Service parts for the 20REOZD
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredFuel system
1 requiredOil system
1 requiredBelts
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 20 kW |
| Standby kVA | 25 |
| Prime power | 18 kW |
| Emissions | Tier 4i |
| Controller | Decision-Maker 3000 |
| Oil capacity | 5.8 L |
| Alternator | Fast-Response PMG (Class Class H insulation) |
| Voltage options | 480 V |
| Phase | 3-phase |
| Rated current | 25 A |
| Circuit breaker | 25 A |
| Battery group | Group 27 |
| Battery cranking | 650 CCA |
| Battery voltage | 12 V |
| Battery quantity | 1 |
| Coolant capacity | 2.7 L |
| Wet weight | 771 kg |
| Sound level | 64.0 dBA @ 7 m |
| Fuel tank | 152.0 L |
Maintenance & consumables
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Element, air cleaner | ×1 | GM42265 | 250 hr | Amazon eBay $30.00 |
| Fuel filter | Filter, fuel | GM32359 | 500 hr | Amazon eBay $26.87 NAPA $27.27 KuduParts $20.00 | |
| Oil filter | Filter, oil | 252834 | 50 hr | Amazon eBay $27.95 PartsGeek $7.98 NAPA $9.09 | |
| Battery | Check the battery | — | 50 hr | ||
| Belt | Belt, fan | 225022 | 500 hr | Amazon eBay | |
| Coolant | Replace the coolant | — | 250 hr | ||
| Oil | CD or CF class | — | 50 hr | ||
| Spark plug | Check the spark plugs | — | 500 hr |
Service specifications
52| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Torque | American Standard fastener 1-12 | 283.0 Nm (209 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 2 or 5 |
| Torque | American Standard fastener 1-8 | 259.0 Nm (191 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 2 or 5 |
| Torque | American Standard fastener 1/2-13 | 60.0 Nm (44 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 2 or 5 |
| Torque | American Standard fastener 1/2-20 | 66.0 Nm (49 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 2 or 5 |
| Torque | American Standard fastener 1/4-20 | 6.8 Nm (60 in. lb.) | Nm (in. lb.) | assembled into cast iron or steel, grade 2 or 5 |
| Torque | American Standard fastener 1/4-28 | 8.1 Nm (72 in. lb.) | Nm (in. lb.) | assembled into cast iron or steel, grade 2 or 5 |
| Torque | American Standard fastener 10-24 | 2.9 Nm (26 in. lb.) | Nm (in. lb.) | assembled into cast iron or steel, grade 2 or 5 |
| Torque | American Standard fastener 10-32 | 2.9 Nm (26 in. lb.) | Nm (in. lb.) | assembled into cast iron or steel, grade 2 or 5 |
| Torque | American Standard fastener 3/4-10 | 199.0 Nm (147 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 2 or 5 |
| Torque | American Standard fastener 3/4-16 | 222.0 Nm (164 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 2 or 5 |
| Torque | American Standard fastener 3/8-16 | 24.0 Nm (18 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 2 or 5 |
| Torque | American Standard fastener 3/8-24 | 27.0 Nm (20 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 2 or 5 |
| Torque | American Standard fastener 5/16-18 | 13.6 Nm (120 in. lb.) | Nm (in. lb.) | assembled into cast iron or steel, grade 2 or 5 |
| Torque | American Standard fastener 5/16-24 | 14.9 Nm (132 in. lb.) | Nm (in. lb.) | assembled into cast iron or steel, grade 2 or 5 |
| Torque | American Standard fastener 5/8-11 | 113.0 Nm (83 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 2 or 5 |
| Torque | American Standard fastener 5/8-18 | 128.0 Nm (94 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 2 or 5 |
| Torque | American Standard fastener 7/16-14 | 39.0 Nm (29 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 2 or 5 |
| Torque | American Standard fastener 7/16-20 | 43.0 Nm (32 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 2 or 5 |
| Torque | American Standard fastener 8-32 | 1.8 Nm (16 in. lb.) | Nm (in. lb.) | assembled into cast iron or steel, grade 2 or 5 |
| Torque | American Standard fastener 9/16-12 | 81.0 Nm (60 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 2 or 5 |
| Torque | American Standard fastener 9/16-18 | 91.0 Nm (67 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 2 or 5 |
| Torque | Metric fastener M10 x 1.25 | 31.0 Nm (23 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 5.8 or 8.8 |
| Torque | Metric fastener M10 x 1.50 | 30.0 Nm (22 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 5.8 or 8.8 |
| Torque | Metric fastener M12 x 1.50 | 56.0 Nm (41 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 5.8 or 8.8 |
| Torque | Metric fastener M12 x 1.75 | 53.0 Nm (39 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 5.8 or 8.8 |
| Torque | Metric fastener M14 x 1.50 | 87.0 Nm (64 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 5.8 or 8.8 |
| Torque | Metric fastener M14 x 2.00 | 83.0 Nm (61 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 5.8 or 8.8 |
| Torque | Metric fastener M16 x 1.50 | 132.0 Nm (97 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 5.8 or 8.8 |
| Torque | Metric fastener M16 x 2.00 | 127.0 Nm (94 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 5.8 or 8.8 |
| Torque | Metric fastener M18 x 1.50 | 189.0 Nm (140 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 5.8 or 8.8 |
| Torque | Metric fastener M18 x 2.50 | 179.0 Nm (132 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 5.8 or 8.8 |
| Torque | Metric fastener M6 x 1.00 | 6.2 Nm (4.6 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 5.8 or 8.8 |
| Torque | Metric fastener M8 x 1.00 | 16.0 Nm (11 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 5.8 or 8.8 |
| Torque | Metric fastener M8 x 1.25 | 15.0 Nm (11 ft. lb.) | Nm (ft. lb.) | assembled into cast iron or steel, grade 5.8 or 8.8 |
| Torque | Pressure wire connector with internal-drive socket-head screw; socket size across flats 12.7 mm (1/2 in.) | 56.5 Nm (500 in. lb.) | Nm (in. lb.) | |
| Torque | Pressure wire connector with internal-drive socket-head screw; socket size across flats 14.3 mm (9/16 in.) | 67.8 Nm (600 in. lb.) | Nm (in. lb.) | |
| Torque | Pressure wire connector with internal-drive socket-head screw; socket size across flats 3.2 mm (1/8 in.) | 5.1 Nm (45 in. lb.) | Nm (in. lb.) | |
| Torque | Pressure wire connector with internal-drive socket-head screw; socket size across flats 4.0 mm (5/32 in.) | 11.4 Nm (100 in. lb.) | Nm (in. lb.) | |
| Torque | Pressure wire connector with internal-drive socket-head screw; socket size across flats 4.8 mm (3/16 in.) | 13.8 Nm (120 in. lb.) | Nm (in. lb.) | |
| Torque | Pressure wire connector with internal-drive socket-head screw; socket size across flats 5.6 mm (7/32 in.) | 17.0 Nm (150 in. lb.) | Nm (in. lb.) | |
| Torque | Pressure wire connector with internal-drive socket-head screw; socket size across flats 6.4 mm (1/4 in.) | 22.6 Nm (200 in. lb.) | Nm (in. lb.) | |
| Torque | Pressure wire connector with internal-drive socket-head screw; socket size across flats 7.9 mm (5/16 in.) | 31.1 Nm (275 in. lb.) | Nm (in. lb.) | |
| Torque | Pressure wire connector with internal-drive socket-head screw; socket size across flats 9.5 mm (3/8 in.) | 42.4 Nm (375 in. lb.) | Nm (in. lb.) | |
| Torque | Screw-type pressure wire connector, wire size 1/0-2/0 AWG (53.5-67.4 mm2), other connections | 20.3 Nm (180 in. lb.) | Nm (in. lb.) | |
| Torque | Screw-type pressure wire connector, wire size 1250-2000 kcmil (635-1016 mm2), other connections | 67.8 Nm (600 in. lb.) | Nm (in. lb.) | |
| Torque | Screw-type pressure wire connector, wire size 18-10 AWG (0.82-5.3 mm2), other connections | 8.5 Nm (75 in. lb.) | Nm (in. lb.) | |
| Torque | Screw-type pressure wire connector, wire size 250-350 kcmil (127-177 mm2), other connections | 36.7 Nm (325 in. lb.) | Nm (in. lb.) | |
| Torque | Screw-type pressure wire connector, wire size 3 AWG (26.7 mm2), other connections | 16.9 Nm (150 in. lb.) | Nm (in. lb.) | |
| Torque | Screw-type pressure wire connector, wire size 3/0-4/0 AWG (85.0-107.2 mm2), other connections | 28.2 Nm (250 in. lb.) | Nm (in. lb.) | |
| Torque | Screw-type pressure wire connector, wire size 500 kcmil (253 mm2), other connections | 42.4 Nm (375 in. lb.) | Nm (in. lb.) | |
| Torque | Screw-type pressure wire connector, wire size 6-4 AWG (13.3-21.2 mm2), other connections | 12.4 Nm (110 in. lb.) | Nm (in. lb.) | |
| Torque | Screw-type pressure wire connector, wire size 800-1000 kcmil (406-508 mm2), other connections | 56.5 Nm (500 in. lb.) | Nm (in. lb.) |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Recommended fluids
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Fuel | No. 2 domestic burner oil (diesel) | Fuel Inlet 1/4 NPT; Fuel Return 8 mm (5/16 in.); day tank sizes 38-3952 L (10-1044 gal.); day tank should provide at least 4 hours of fuel consumption; main tank recommended sized for 8 hours of operation at rated load if no code requirement applies; never fill tank more than 95% full |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Fault codes
2| Code | Name | Meaning | Severity | Action |
|---|---|---|---|---|
| CO-3 | Fault displayed if the CO parameter is set incorrectly | Shutdown | ||
| CO-6 | Fault displayed if the CO parameter is set incorrectly | Shutdown |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
12Controller Configuration adjustment
⚠ Be sure to save the new settings immediately before exiting the configuration mode; changes are lost if the controller times out (about 1 minute).
- Hold the Select button and move the master switch to RUN to enter configuration mode.
- Press the down arrow key then the up arrow key 3 times to enter configuration mode (password).
- Set the voltage/frequency parameter Uu for the model.
- Set the unit configuration parameter Uc (marine, standby, mobile).
- Set the engine type parameter Ec.
- Press the up arrow at the Adnc display to enter advanced configuration mode.
- Set the engine data input type Ed.
- Set the battery voltage Bt (12 or 24 VDC).
- Set the communications parameter Cn.
- Enter save mode and save your settings before exiting.
Output Voltage and Frequency Adjustment adjustment
⚠ The generator set must be running during these adjustments.
⚠ The engine speed (frequency) adjustment menus are not accessible on models with mechanical governors.
Tools: multimeter
- Move the master switch to RUN; the engine starts and runtime hours display.
- Hold the Select button about 5 seconds until the program version number displays.
- Press the down arrow key then the up arrow key 3 times to enter adjustment mode.
- 1P: adjust voltage coarse in large increments (approximately 5-7 volts per step).
- 2P: adjust voltage fine in smaller increments (approximately 0.5-0.7 volts per step).
- Adjust voltage stability (gain) coarse and fine.
- 3P: set volts/Hz (00=low, 09=high).
- 4P: adjust engine governor speed coarse and fine.
- 5P: adjust engine governor stability (gain) coarse and fine.
- Enter SAVE mode and save settings before exiting the adjustment mode.
Voltage Regulator Adjustment Procedure adjustment
⚠ The voltage regulation menus on the Decision-Maker 3000 controller will not be displayed for these models.
Tools: voltmeter, frequency meter
- Verify that the generator set master switch is in the OFF/RESET position.
- Turn the Volts/Hz and the stability potentiometers fully counterclockwise. Connect the voltmeter to the AC circuit or an electrical outlet.
- Move the generator set master switch to the RUN position.
- Change the voltage adjustment control at the controller until the desired output voltage is achieved.
- Rotate the stability potentiometer clockwise until light flicker minimizes.
- Readjust the voltage adjustment control at the controller until the desired output voltage is achieved.
- If the engine has a speed adjustment governor, adjust engine speed to the specified cut-in frequency.
- Rotate the volts/Hz potentiometer clockwise until the voltage level begins to drop.
- Readjust the engine speed to 1800 rpm for 60 Hz models or 1500 rpm for 50 Hz models.
- Readjust the voltage adjustment control until the desired output is achieved.
- Readjust the stability potentiometer until light flicker minimizes.
- Move the generator set master switch to the OFF/RESET position.
Cooling System Checklist diagnostic
⚠ Shut down immediately if problems arise during startup
⚠ Recheck belt tension after 5-10 minutes and again after 8-12 hours of operation
- Verify cooling fan position in fan shroud
- Check mounting hardware
- Check fan motor for free rotation
- Check V-belts for alignment and tension
- Fill system with coolant and check all connections for tightness and leaks
- Verify electrical connections secure and power source matches motor nameplate
- Verify no foreign material loose in fan air stream
- With unit running check fan clearance, excessive vibration, excessive noise, coolant leaks
Battery Installation and Connection installation
⚠ Battery gases. Explosion can cause severe injury or death. Do not smoke or permit flames or sparks near a battery.
⚠ Remove the negative (--) lead first when disconnecting; reconnect the negative (--) lead last.
- Verify that the generator set master control switch is in the OFF/RESET position.
- Ensure that the starting battery is fully charged before placing the battery in service.
- Clean the battery posts and/or adapters if necessary.
- Install battery post adapters, if needed.
- Place the battery on the battery rack on the skid.
- Connect the red battery cable to the positive (+) battery terminal.
- Connect the black battery cable to the negative (--) battery terminal.
- Place the boots over the battery terminals.
- Plug the battery heater and battery charger, if equipped, into the 120 VAC power supply.
Controller Replacement installation
⚠ Disconnect the battery cables before working on the generator set; remove the negative lead first and reconnect it last.
Tools: multimeter, personal computer with Program Loader Software
- Record generator set information required for configuration: model, market, voltage, frequency, phases, battery voltage.
- Place the generator set master switch in the OFF position.
- Disconnect power to the battery charger, if equipped.
- Disconnect the engine starting battery(ies), negative lead first.
- Open the junction box; disconnect the controller at P1, J15, and J16.
- Models ECD/EFCD, EGD/EFGD, EGZD only: disconnect the CO sensor harness at the 4-pin connector.
- Remove four controller mounting screws and remove the old controller.
- ECD/EFCD, EGD/EFGD, EGZD only: install CO sensor module assembly GM46362 on the back of the new controller GM47982.
- Install the new controller and secure with the mounting screws.
- Reconnect the P1, J15, and J16 connectors; connect the CO sensor harness on applicable models.
- Models 10/13/15EG, 10/13/15ERG, 15/30RES, 15/30RYG with S/N before 2053692: cut a 1-in. section of the gray/orange lead entering pin 9 at the ECM connector.
- Check that the generator set master switch is in the OFF position.
- Reconnect the engine starting battery, negative lead last.
- Reconnect power to the battery charger, if equipped.
- Check the controller application software version and load the latest application code if necessary.
Lifting the Generator Set installation
⚠ Unbalanced and elevated weight. Do not lift the generator set from the engine or alternator eyes.
⚠ Never stand under a unit being lifted. Always maintain a safe distance from the unit being lifted.
- Install proper size rigging at the skid lifting eyes providing a direct pull on the skid lifting eye.
- Use a spreader bar to prevent lifting cables from contacting air cleaners, shrouds, or other protruding components.
- Select single or double spreader bar and hook method, or single or double spreader bar and skid lifting bar method.
- Protect cables, chains, and straps from sharp edges.
- After transporting, check radiator alignment and tighten hardware to specified torque.
Lifting the Generator Set with Attached Enclosure installation
⚠ Do not attach hoisting equipment to the enclosure.
- Enclosure attached directly to skid: lift the assembly by lifting on the skid.
- Enclosure attached directly to subbase fuel tank: lift by all subbase fuel tank lifting eyes.
- For generator set, enclosure, and subbase fuel tank package, use ALL lifting eyes on the subbase fuel tank.
Lifting the Subbase Fuel Tank installation
- Confirm the subbase fuel tank has lifting eyes.
- Empty the tank; do not lift a fuel tank containing fuel or any liquid.
- Remove any vent piping longer than 1 m (3.3 ft.) from the fuel tank.
- Attach one or two spreader bars as shown.
Prepare the Site, Indoor Installations, Open Units installation
- Clear all combustible materials from the generator set location.
- Lay a concrete pad that extends at least 152 mm (6 in.) beyond the generator set on all sides.
- Include mounting bolts at the locations shown on the dimension drawing.
- Provide air intake and outlet openings as described in Section 5.1.
Prepare the Site, Outdoor Installations, Enclosed Units installation
- Obtain a building permit and contact local utility companies to mark underground pipes and cables.
- Clear combustible materials from an area at least 2.4 m (8 ft.) beyond the exhaust end.
- Spread a 76-mm (3-in.) thick layer of gravel to support the concrete mounting pad.
- Lay a concrete pad that extends at least 152 mm (6 in.) beyond the generator set on all sides.
- Include mounting bolts at locations shown on the dimension drawing.
Procedure to Fill with Deaeration installation
- Fill the radiator at the filler neck
- Fill the radiator through a top tank or expansion/surge tank inlet before the final hose connection
- Continue filling until coolant appears in the sight glass in the radiator top tank
- Check and correct any leaks in the system
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Voltage reconnection
| Voltage | Phase | Connection | Leads | Notes |
|---|---|---|---|---|
| 12-lead optional voltage connections | 12 | Alternator optional feature | ||
| 4-lead dedicated voltages | 4 | Alternator standard feature | ||
| 100 VAC | 1 | 1Ph, 2W | Uu00; 60 Hz | |
| 100 VAC | 1 | 1Ph, 3W | Uu00; 60 Hz | |
| 100-120/200--240 | single | 4-lead, 3-wire configuration (no jumper lead, two-pole circuit breaker required) | L1, L2 | Leads L1 and L2 are for different phases; never connect them together |
| 100-120/200-240 | single phase, 3-wire | does not use a jumper lead; use a two-pole circuit breaker | L1, L2 (different phases; never connect together) | Four-lead reconnection; application of two single-pole circuit breakers does not conform to NEC for a 200--240-volt load |
| 100/200 VAC | 1 | 1Ph, 3W | Uu08; 60 Hz | |
| 110 VAC | 1 | 1Ph, 2W | Uu05; 50 Hz | |
| 110 VAC | 1 | 1Ph, 3W | Uu05; 50 Hz | |
| 110/127/139/240/254/277 | single-phase | switchable | Towable generator model specifications; some models n/a | |
| 110/190 VAC | 3 | Wye | Uu17; 50 Hz | |
| 110/220 VAC | 1 | 1Ph, 3W | Uu07; 50 Hz | |
| 110/220 VAC | 1 | Dogleg | Uu07; 50 Hz | |
| 110/220 VAC | 3 | Delta | Uu15; 50 Hz | |
| 115 VAC | 1 | 1Ph, 2W | Uu05; 50 Hz | |
| 115/200 VAC | 3 | Wye | Uu23; 50 Hz | |
| 115/230 VAC | 1 | 1Ph, 3W | Uu02; 50 Hz | |
| 115/230 VAC | 1 | Dogleg | Uu06; 50 Hz | |
| 115/230 VAC | 3 | Delta | Uu14; 50 Hz | |
| 120 VAC | 1 | 1Ph, 2W | Uu00; 60 Hz | |
| 120 VAC | 1 | 1Ph, 3W | Uu00; 60 Hz | |
| 120/208 VAC | 3 | Wye | Uu11; 60 Hz | |
| 120/240 VAC | 1 | 1Ph, 3W | Uu01; 60 Hz | |
| 120/240 VAC | 1 | Dogleg | Uu01; 60 Hz | |
| 120/240 VAC | 3 | Delta | Uu10; 60 Hz | |
| 127/220 VAC | 3 | Wye | Uu16; 60 Hz | |
| 139/240 VAC | 3 | Wye | Uu10; 60 Hz | |
| 208/220/240/415/440/480 | 3-phase | reconnectable | Towable generator model specifications | |
| 208/220/240/415/440/480 | 3-phase | switchable | Towable generator model specifications | |
| 220 VAC | 1 | 1Ph, 2W | Uu12; 50 Hz |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Common questions
What is the power rating of the Kohler 20REOZD?
The Kohler 20REOZD is rated 20 kW standby (25.0 kVA).
What fuel does the Kohler 20REOZD use?
The Kohler 20REOZD runs on diesel.
What is the coolant capacity of the Kohler 20REOZD?
The Kohler 20REOZD cooling system holds 2.7 liters (0.7 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
How much oil does the Kohler 20REOZD take?
The Kohler 20REOZD has an engine oil capacity of 5.8 liters (6.1 US quarts), per the manufacturer specification sheet.
What is the prime power rating of the Kohler 20REOZD?
The Kohler 20REOZD is rated 18 kW prime (22 kVA), against 20 kW standby.
How loud is the Kohler 20REOZD?
The Kohler 20REOZD is rated at 64.0 dBA at 7 m, per the manufacturer specification sheet.
What size fuel tank does the Kohler 20REOZD have?
The Kohler 20REOZD has a 152 liter (40 US gallon) fuel tank.
What voltage does the Kohler 20REOZD produce?
The Kohler 20REOZD is offered in 480 V, 3-phase-phase.
What size battery does the Kohler 20REOZD need?
The Kohler 20REOZD uses 1 battery, 12 V each, 650 CCA, group Group 27, per the manufacturer specification sheet.
Which alternator is fitted to the Kohler 20REOZD?
The Kohler 20REOZD uses a Fast-Response PMG alternator. Insulation class Class H.
What oil filter does the Kohler 20REOZD use?
The Kohler 20REOZD uses oil filter part number 252834.
What fuel filter fits the Kohler 20REOZD?
The Kohler 20REOZD uses fuel filter part number GM32359.
What air filter fits the Kohler 20REOZD?
The Kohler 20REOZD uses air filter part number GM42265.
Troubleshooting
74Fault codes
| Code | Meaning | Remedy |
|---|---|---|
| F4 | Aux. winding fuse F4 blown (lead 55) | Replace blown fuse; If fuse blows again, check stator. |
Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Generator set does not crank | Weak or dead battery | Recharge or replace battery; Check battery charger connections and operation, if equipped. |
| Generator set does not crank | Battery connections | Check for reversed or poor battery connections. |
| Generator set does not crank | Open circuit in engine/controller connections | Check for loose connections; Check the wire harness continuity. |
| Generator set does not crank | Blown fuse | Replace fuse; if fuse blows again, check circuit and components. |
| Generator set does not crank | Crank relay | Check connections to the crank relay; Check for a good ground connection; Test the crank relay. |
| Generator set does not crank | Poor ground (--) connection | Clean and retighten. |
| Generator set does not crank | Starter | Check the starter connections; Rebuild or replace the starter. |
| Generator set does not crank | Controller | Check the controller connections and operation; Check for power to the controller; Troubleshoot the controller. |
| Generator set cranks but does not start | No fuel | Check the fuel supply. |
| Generator set cranks but does not start | Loose connection or open circuit | Check for loose or open connections at the fuel solenoid (lead 70A); Check the controller/engine wiring continuity. |
| Generator set cranks but does not start | Air cleaner clogged | Clean or replace. |
| Generator set cranks but does not start | Incorrect controller configuration | Check for correct controller configuration parameters. |
| Generator set cranks but does not start | No engine rotation sensed (check for an overcrank fault shutdown) | Check for a locked rotor. |
| Generator set starts hard | Low battery voltage | Check battery voltage; Check battery charger connections and operation, if equipped. |
| Generator set starts hard | Air cleaner clogged | Replace element. |
| Generator set starts hard | Worn piston rings, valves | Check compression. |
| Generator set starts but shuts down | Fault shutdown | Check for a fault shutdown message on the controller display; Correct the fault and then reset the controller. |
| Generator set stops suddenly | Fault shutdown | Check for a fault shutdown message on the controller display; Correct the fault and then reset the controller. |
| Generator set stops suddenly | No fuel | Check the fuel supply. |
| Generator set stops suddenly | Fuel line restriction | Inspect fuel lines. |
| Generator set stops suddenly | Air cleaner clogged | Replace element. |
| Generator set stops suddenly | Blown fuse | Replace fuse; If fuse blows again, test generator components. |
| Generator set stops suddenly | Engine overheated (hot engine only) | Check air intake, oil level, air inlet/outlet. |
| Generator set stops suddenly | Low oil pressure (LOP) shutdown | Attempt startup; If the unit shuts down, remove the lead from the LOP switch and reset the controller; A successful restart attempt indicates a faulty LOP shutdown switch. |
| Generator set stops suddenly | Engine overloaded | Reduce electrical load. |
| Generator set stops suddenly | Loss of generator output voltage to controller | Check controller connections; Check voltage regulator connections; Check continuity of AC sensing leads 11 and 44 (for 1-phase models) or leads 7, 8, and 9 (for 3-phase models). |
| Generator set stops suddenly | Faulty flash relay | Test/replace flash relay P16. |
| Generator set operates erratically | Air cleaner clogged | Replace element. |
| Generator set operates erratically | Governor adjustment incorrect | Adjust governor stability. |
| Generator set operates erratically | Inadequate cooling (hot engine only) | Inspect air inlet and outlet. |
| Generator set operates erratically | Carbon buildup in engine | Clean cylinder head. |
| Generator set operates erratically | Engine valves not seating correctly | Inspect valves and valve seats. |
| Generator set lacks power | Air intake restriction, inadequate cooling | Inspect air intakes and exhaust for obstructions; Check the air cleaner. |
| Generator set lacks power | Generator overloaded | Reduce load. |
| Generator set lacks power | Controller speed/frequency setting incorrect | Check controller settings. |
| Generator set lacks power | Engine power loss | Refer to the Engine Service Manual for troubleshooting and repair instructions. |
| Generator set lacks power | Governor misadjustment or malfunction | Test/adjust governor. |
| Generator set overheats | Inadequate cooling | Inspect cooling system for obstructions. |
| Generator set overheats | Air cleaner clogged | Replace element. |
| Low output or excessive drop in voltage | Generator overloaded | Reduce load. |
| Low output or excessive drop in voltage | Incorrect controller settings | Check and adjust the controller settings. |
| Low output or excessive drop in voltage | Voltage regulator misadjustment or malfunction | Test/adjust voltage regulator. |
| Low output or excessive drop in voltage | Alternator or control system | Perform separate excitation procedure to isolate problem to the alternator or the control system. |
| Low output or excessive drop in voltage | Controller | Check the controller wiring and connections; Troubleshoot the controller. |
| Low output or excessive drop in voltage | Rotor (open, grounded, or shorted windings) | Test and/or replace. |
| Low output or excessive drop in voltage | Stator (open, grounded, or shorted windings) | Test and/or replace. |
| Low output or excessive drop in voltage | Low engine speed causing voltage roll-off | Check system voltage, frequency and engine type settings; Adjust the engine governor speed; Troubleshoot the engine. |
| Light flicker | Voltage stability (gain) setting | Check and adjust the voltage stability (gain) setting; Test/adjust voltage regulator. |
| High generator output voltage | Incorrect controller voltage settings | Check and adjust the controller voltage settings. |
| High generator output voltage | Voltage regulator misadjustment or malfunction | Test/adjust voltage regulator. |
| High generator output voltage | Engine speed too high | Check the engine speed using tachometer or frequency meter; Adjust governor as necessary. |
| High generator output voltage | Loose voltage sensing connections | Check connections: stator leads 11 and 44 (for 1-phase models) or leads 7, 8, and 9 (for 3-phase models); Check controller connections; Check V voltage regulator connections. |
| High generator output voltage | Controller | Check wiring and connections; Troubleshoot the controller. |
| No output voltage | AC output circuit breaker open | Check for AC voltage on the generator side of the circuit breaker; If there is AC voltage on the generator side of the breaker, then a problem in the load circuits is causing the line circuit breaker to trip; Check for and correct short circuits or overloading on the load side before resetting the circuit breaker. |
| No output voltage | Alternator or control system | Perform separate excitation procedure to isolate the problem to the alternator or the control system; Then troubleshoot the alternator or control system components as follows. |
| No output voltage | Controller | Check controller settings; Check wiring and connections; Troubleshoot the controller. |
| No output voltage | Rotor connections | Check for open circuit in the rotor connection circuit (leads FN and FP to the voltage regulator). |
| No output voltage | Rotor (open, grounded, or shorted windings) | Check voltage and continuity. |
| No output voltage | Stator (open, grounded, or shorted windings) | Check voltage and continuity. |
| No output voltage | Flash relay | Test/replace flash relay P16. |
| Generator set is noisy | Exhaust system leaks | Check and replace as necessary. |
| Generator set is noisy | Engine not running smoothly | See "Generator set operates erratically" in this table. |
| Generator set is noisy | Broken or damaged vibromount(s) | Check and replace as necessary. |
| Generator set is noisy | Loose or vibrating sheet metal/housing | Retighten screws, replace rivets. |
| Generator set is noisy | Exhaust piping or air inlets/outlets not securely installed | Inspect for loose parts and secure if necessary. |
| Generator set is noisy | Excessive engine/generator vibration | Check rotor, crankshaft, bearing, etc. (disassembly of engine and/or alternator may be required). |
| Emits black or gray smoke | Air intake restriction | Check air cleaner and intake. |
| Emits black or gray smoke | Oil level high | Check oil level. |
| Emits black or gray smoke | Worn piston rings, valves, etc. | Check compression. |
| High oil consumption | External leakage/defective gaskets | Replace gaskets. |
| High oil consumption | Worn piston rings, valves, etc. | Check compression. |
| Engine knocks | Excessive load | Reduce load. |
| Engine knocks | Low oil level | Check oil level and add oil if low. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Repair guides
11- Battery Installation and Connection
- Cooling System Checklist
- Lifting the Generator Set with Attached Enclosure
- Lifting the Subbase Fuel Tank
- Prepare the Site, Indoor Installations, Open Units
- Prepare the Site, Outdoor Installations, Enclosed Units
- Procedure to Fill with Deaeration
- Procedure to Fill without Deaeration
- Remote Radiator Installation
- Twelve-Lead Reconnection Procedure
- Voltage Regulator Adjustment Procedure
Step-by-step procedures compiled from the Kohler service manual for this model.
Parts
131| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 225006 | Gasket, thermostat | 1 | Gasket | Amazon eBay |
| 225022 | Belt, fan | 1 | Belt | Amazon eBay |
| 225222 | Gasket, exhaust | 1 | Gasket | Amazon eBay |
| 225223 | Gasket, exhaust | 1 | Gasket | Amazon eBay |
| 225265 | Flange, exhaust outlet | 1 | Flange | Amazon eBay $49.99 |
| 249865 | Gasket, thermostat | 1 | Gasket | Amazon eBay |
| 252834 | Filter, oil | 1 | Oil filter | Amazon eBay $27.95 PartsGeek $7.98 NAPA $9.09 |
| GM20748 | Boot, battery lug | 1 | Boot | Amazon eBay |
| GM28823 | Sensor, oil temperature | 1 | Sensor | Amazon eBay $50.00 |
| GM29351 | Screen, air inlet guard | 8 | Screen | Amazon eBay |
| GM32359 | Filter, fuel | 1 | Fuel filter | Amazon eBay $26.87 NAPA $27.27 KuduParts $20.00 |
| GM33146 | Boot, battery lug | 1 | Boot | Amazon eBay |
| GM34362-KA1 | Rodent Guard | 1 | Rodent guard | Amazon eBay |
| GM34387 | Thermostat | 1 | Thermostat | Amazon eBay $98.63 |
| GM41673 | Muffler, exhaust | 1 | Muffler | Amazon eBay |
| GM41674 | Muffler, exhaust | 1 | Muffler | Amazon eBay $324.95 |
| GM41678-KA1 | Silencer, engine mounted | 1 | Silencer | Amazon eBay |
| GM41678-KA2 | Silencer, engine mounted | 1 | Silencer | Amazon eBay |
| GM41678-KA3 | Silencer, engine mounted | 1 | Silencer | Amazon eBay |
| GM41916 | Screw, hex cap | 4 | Screw | Amazon eBay |
| GM42265 | Element, air cleaner | 1 | Air filter | Amazon eBay $30.00 |
| GM42266 | Element, air cleaner | 1 | Air filter | Amazon eBay $22.50 |
| GM42549 | Adapter, exhaust | 2 | Adapter | Amazon eBay |
| GM42797 | Bracket, fire extinguisher | 1 | Bracket | Amazon eBay |
| GM42798 | Rear Stabilizer Jacks | 1 | Stabilizer jacks | Amazon eBay |
| GM46005-KP2 | Rack, battery | 1 | Battery rack | Amazon eBay |
| GM46016-KP1 | Fire Extinguisher | 1 | Fire extinguisher | Amazon eBay |
| GM47465 | Filter, oil | 1 | Oil filter | Amazon eBay $23.52 FridayParts $20.19 |
| GM47579-KP1 | Stand, jack (set of 2) | 1 | Jack stand | Amazon eBay |
| M933-10020-60 | Screw, hex cap | 1 | Screw | Amazon eBay |
| X-205-29 | Pipe | 1 | Pipe | Amazon eBay |
| X-205-30 | Pipe | 1 | Pipe | Amazon eBay |
| X-215-21 | Fitting, elbow, 90 degree | 1 | Elbow | Amazon eBay |
| X-216-39 | Coupling, pipe | 1 | Coupling | Amazon eBay |
| X-25-73 | Washer, plain, 0.266 ID x 1 in. OD | 8 | Washer | Amazon eBay $3.61 |
| X-545-188 | Cable, battery | 1 | Cable | Amazon eBay |
| X-545-189 | Cable, battery | 1 | Cable | Amazon eBay |
| 223316 | Fuse, 10 A, 250 V | 1 | Service part / kit | Amazon eBay $31.37 |
| GM10397 | Harness, low fuel level alarm | 1 | Service part / kit | Amazon eBay |
| GM10407 | Box, assembly | 1 | Service part / kit | Amazon eBay |
| GM41972-KA1 | Bracket, leak alarm | 1 | Service part / kit | Amazon eBay |
| GM42116 | Inner Tank Leak Alarm | 1 | Service part / kit | Amazon eBay |
| M125A-03-80 | 3.2 7.0 0.5 M3 | 1 | Service part / kit | Amazon eBay eBay |
| M125A-04-80 | Bolt/Part No. ID OD Thick. Screw M125A-04-80 4.3 9.0 0.8 M4 | 1 | Service part / kit | Amazon eBay eBay |
| M125A-05-80 | Bolt/Part No. ID OD Thick. Screw M125A-05-80 5.3 10.0 1.0 M5 | 1 | Service part / kit | Amazon eBay eBay |
| M125A-06-80 | Washer, Plain | 1 | Service part / kit | Amazon eBay eBay |
| M125A-08-80 | Washer, Plain 8.4 ID x 16.0 OD | 1 | Service part / kit | Amazon eBay eBay |
| M125A-10-80 | Washer, plain | 1 | Service part / kit | Amazon eBay eBay |
| M125A-12-80 | Bolt/Part No. ID OD Thick. Screw M125A-12-80 13.0 24.0 2.5 M12 | 1 | Service part / kit | Amazon eBay eBay |
| M125A-14-80 | Bolt/Part No. ID OD Thick. Screw M125A-14-80 15.0 28.0 2.5 M14 | 1 | Service part / kit | Amazon eBay eBay |
| M125A-16-80 | Bolt/Part No. ID OD Thick. Screw M125A-16-80 17.0 30.0 3.0 M16 | 1 | Service part / kit | Amazon eBay eBay |
| M125A-18-80 | Bolt/Part No. ID OD Thick. Screw M125A-18-80 19.0 34.0 3.0 M18 | 1 | Service part / kit | Amazon eBay eBay |
| M125A-20-80 | Bolt/Part No. ID OD Thick. Screw M125A-20-80 21.0 37.0 3.0 M20 | 1 | Service part / kit | Amazon eBay eBay |
| M125A-24-80 | Bolt/Part No. ID OD Thick. Screw M125A-24-80 25.0 44.0 4.0 M24 | 1 | Service part / kit | Amazon eBay eBay |
| M6923-06-80 | Nut, Hex 6mm | 2 | Service part / kit | Amazon eBay $8.80 eBay |
| M6923-08-80 | Nut, Hex 8mm | 1 | Service part / kit | Amazon eBay $8.80 eBay |
| M6923-10-62 | M10-1.50 | 1 | Service part / kit | Amazon eBay eBay |
| M6923-10-80 | M10-1.50 | 16 | Service part / kit | Amazon eBay eBay |
| M6923-12-80 | M12-1.75 | 1 | Service part / kit | Amazon eBay eBay |
| M6923-16-80 | M16-2.00 | 1 | Service part / kit | Amazon eBay eBay |
| M7985A-03010-20 | M3-0.50 x 10 | 1 | Service part / kit | Amazon eBay |
| M7985A-03012-20 | M3-0.50 x 12 | 1 | Service part / kit | Amazon eBay |
| M7985A-04010-20 | M4-0.70 x 10 | 1 | Service part / kit | Amazon eBay |
| M7985A-04016-20 | M4-0.70 x 16 | 1 | Service part / kit | Amazon eBay |
| M7985A-04020-20 | Screw, pan head machine | 1 | Service part / kit | Amazon eBay |
| M7985A-04050-20 | M4-0.70 x 50 | 1 | Service part / kit | Amazon eBay |
| M7985A-04100-20 | M4-0.70 x 100 | 1 | Service part / kit | Amazon eBay |
| M7985A-05010-20 | M5-0.80 x 10 | 1 | Service part / kit | Amazon eBay |
| M7985A-05012-20 | M5-0.80 x 12 | 1 | Service part / kit | Amazon eBay $10.76 |
| M7985A-05016-20 | M5-0.80 x 16 | 1 | Service part / kit | Amazon eBay |
| M7985A-05020-20 | M5-0.80 x 20 | 1 | Service part / kit | Amazon eBay $8.80 |
| M7985A-05025-20 | M5-0.80 x 25 | 1 | Service part / kit | Amazon eBay |
| M7985A-05030-20 | M5-0.80 x 30 | 1 | Service part / kit | Amazon eBay |
| M7985A-05080-20 | M5-0.80 x 80 | 1 | Service part / kit | Amazon eBay |
| M7985A-05100-20 | M5-0.80 x 100 | 1 | Service part / kit | Amazon eBay |
| M7985A-06100-20 | M6-1.00 x 100 | 1 | Service part / kit | Amazon eBay |
| M933-06025-60 | Screw, Hex Cap | 1 | Service part / kit | Amazon eBay |
| M933-14025-60 | M14-2.00 x 25 | 1 | Service part / kit | Amazon eBay |
| M933-16025-60 | M16-2.00 x 25 | 1 | Service part / kit | Amazon eBay |
| M933-16030-82 | M16-2.00 x 30 | 1 | Service part / kit | Amazon eBay |
| M933-16035-60 | M16-2.00 x 35 | 1 | Service part / kit | Amazon eBay |
| M933-16040-60 | M16-2.00 x 40 | 1 | Service part / kit | Amazon eBay |
| M933-16045-82 | M16-2.00 x 45 | 1 | Service part / kit | Amazon eBay |
| M933-16050-60 | M16-2.00 x 50 | 1 | Service part / kit | Amazon eBay |
| M933-16050-82 | M16-2.00 x 50 | 1 | Service part / kit | Amazon eBay |
| M933-16060-60 | M16-2.00 x 60 | 1 | Service part / kit | Amazon eBay |
| M933-18035-60 | M18-2.50 x 35 | 1 | Service part / kit | Amazon eBay |
| M933-18050-60 | M18-2.50 x 50 | 1 | Service part / kit | Amazon eBay |
| M933-18060-60 | M18-2.50 x 60 | 1 | Service part / kit | Amazon eBay |
| M933-20050-60 | M20-2.50 x 50 | 1 | Service part / kit | Amazon eBay |
| M933-20055-60 | M20-2.50 x 55 | 1 | Service part / kit | Amazon eBay |
| M933-24060-60 | M24-3.00 x 60 | 1 | Service part / kit | Amazon eBay |
| M933-24065-60 | M24-3.00 x 65 | 1 | Service part / kit | Amazon eBay |
| M933-24070-60 | M24-3.00 x 70 | 1 | Service part / kit | Amazon eBay |
| M934-03-50 | M3-0.50 | 1 | Service part / kit | Amazon eBay eBay |
| M934-04-50 | M4-0.70 | 1 | Service part / kit | Amazon eBay eBay |
| M934-04-B | M4-0.70 | 1 | Service part / kit | Amazon eBay eBay |
| M934-05-50 | M5-0.80 | 1 | Service part / kit | Amazon eBay $8.80 eBay $8.80 |
| M934-06-60 | M6-1.00 | 1 | Service part / kit | Amazon eBay eBay |
| M934-06-64 | M6-1.00 | 1 | Service part / kit | Amazon eBay eBay |
| M934-08-60 | M8-1.25 | 1 | Service part / kit | Amazon eBay eBay |
| M934-10-60 | M10-1.50 | 1 | Service part / kit | Amazon eBay eBay |
| M934-10-60F | M10-1.25 | 1 | Service part / kit | Amazon eBay eBay |
| M934-12-60 | M12-1.75 | 1 | Service part / kit | Amazon eBay eBay |
| M934-12-60F | M12-1.25 | 1 | Service part / kit | Amazon eBay eBay |
| M934-18-80 | M18-2.5 | 1 | Service part / kit | Amazon eBay eBay |
| M934-20-80 | M20-2.50 | 1 | Service part / kit | Amazon eBay eBay |
| M934-22-60 | M22-2.50 | 1 | Service part / kit | Amazon eBay eBay |
| M934-24-80 | M24-3.00 | 1 | Service part / kit | Amazon eBay eBay |
| M934-30-80 | M30-3.50 | 1 | Service part / kit | Amazon eBay eBay |
| M961-14025-60 | M14-1.50 x 25 | 1 | Service part / kit | Amazon eBay |
| M961-14050-82 | M14-1.50 x 50 | 1 | Service part / kit | Amazon eBay |
| M961-16025-60 | M16-1.50 x 25 | 1 | Service part / kit | Amazon eBay |
| M961-16030-82 | M16-1.50 x 30 | 1 | Service part / kit | Amazon eBay |
| M961-16040-60 | M16-1.50 x 40 | 1 | Service part / kit | Amazon eBay |
| M961-16045-82 | M16-1.50 x 45 | 1 | Service part / kit | Amazon eBay |
| M965A-04012-20 | M4-0.70 x 12 | 1 | Service part / kit | Amazon eBay |
| M965A-05012-20 | M5-0.80 x 12 | 1 | Service part / kit | Amazon eBay |
| M965A-05016-20 | M5-0.80 x 16 | 1 | Service part / kit | Amazon eBay |
| M965A-06012-20 | M6-1.00 x 12 | 1 | Service part / kit | Amazon eBay |
| M982-06-80 | Nut, hex, elastic stop | 2 | Service part / kit | Amazon eBay $8.80 eBay $8.80 |
| M982-08-80 | M8-1.25 | 1 | Service part / kit | Amazon eBay $8.80 eBay $8.80 |
| M982-10-80 | M10-1.50 | 1 | Service part / kit | Amazon eBay eBay |
| M982-12-80 | M12-1.75 | 1 | Service part / kit | Amazon eBay eBay |
| M982-14-60 | M14-2.00 | 1 | Service part / kit | Amazon eBay eBay |
| M982-16-80 | M16-2.00 | 1 | Service part / kit | Amazon eBay eBay |
| M982-18-60 | M18-2.50 | 1 | Service part / kit | Amazon eBay eBay |
| M982-20-80 | M20-2.50 | 1 | Service part / kit | Amazon eBay eBay |
| M982-24-60 | M24-3.00 | 1 | Service part / kit | Amazon eBay eBay |
| X-22-26 | Washer, lock, 0.521 ID x 1.24 in. OD | 1 | Service part / kit | Amazon eBay |
| X-25-115 | Washer, lock #10 | 8 | Service part / kit | Amazon eBay $7.70 |
Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Prime | 100% | 0.5 | 0.14 |
| Standby | 100% | 0.5 | 0.14 |
Available documents
Reference — 10REOZDC G6096 (Kohler)Reference — Katalog-promyshlennoj-produktsii (Kohler)Parts manual — tp6395 (Kohler)Parts manual — tp6802 (Kohler)Service manual — adv8857 (Kohler)Service manual — g260823 (Kohler)Service manual — tp6609 (Kohler)Service manual — tp6795 (Kohler)Service manual — tt1364 (Kohler)
This page was generated from the 9 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.