Service parts for the 18TRES
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredOil system
1 requiredElectrical
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | natural gas or propane (LP) vapor |
|---|---|
| Standby power | 18 kW |
| Controller | ADC-RES, ADC-RES (Advanced Digital) |
| Oil capacity | 2.8 L |
| Phase | 3 |
| Circuit breaker | 25 A |
| Battery cranking | 500 CCA |
| Battery voltage | 12 V |
| Battery quantity | 1 |
Same engine, other brands
1 brandThe Kohler CH 980 in this set also powers 1 generator set sold under 1 other brand. Service parts and maintenance intervals for the engine are shared; enclosure, alternator, controller and ratings are not.
| Brand | Models |
|---|---|
| SDMO | RES 16 TEC |
Maintenance & consumables
for the Kohler CH 980| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Element, air filter | 62 083 01-S | buy | ||
| Fuel filter | Check | — | 8 hr | ||
| Oil filter | Filter, oil | 52 050 02-S | Amazon eBay | ||
| Battery | 12-volt battery with a minimum rating of 500 cold cranking amps at 0 F; negative ground, 12-volt engine electrical system | 53AB | 12 hr | Amazon eBay | |
| Belt | Replace stepper motor coupling and bushing | — | 500 hr | ||
| Coolant filter | Inspect and clean the oil cooler | — | 500 hr | ||
| Oil | 2.8 L | — | 150 hr | ||
| Spark plug | 0.76 mm (0.030 in.) | — | 300 hr |
Service intervals
40| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Oil level | Check | 8 hr | 8 hours or before use; 8.5/12 kW models | |
| Air cleaner and precleaner (8.5/12RES) | Replace | 100 hr | 12 mo | Yearly or 100 hours; replace as necessary |
| Air cleaner and precleaner service | Clean | 100 hr | Yearly or 100 hours; 8.5/12 kW models; service more often in dusty/dirty conditions | |
| Air cleaner and precleaner service (8.5/12 kW) | Replace | 100 hr | Yearly or 100 hours; service more frequently under dusty/dirty conditions | |
| Engine oil | Change | 100 hr | 12 mo | 8.5/12RES: yearly or 100 hours |
| Oil cooler | Clean | 100 hr | Yearly or 100 hours; 17/18 kW models | |
| Oil cooler | Inspect | 100 hr | Yearly or 100 hours (17/18 kW models) | |
| Oil cooler (17/18RES) | Clean | 100 hr | 12 mo | Yearly or 100 hours; inspect and clean |
| Air cleaner service | Clean | 150 hr | Yearly or hours shown; 17/18 kW models | |
| Air cleaner service (17/18 kW) | Replace | 150 hr | Yearly or 150/300 hours | |
| Change oil | Change | 150 hr | Yearly or 150 hours (17/18 kW models) | |
| Engine oil (17/18RES) | Change | 150 hr | 12 mo | Yearly or 150 hours |
| Oil | Change | 150 hr | Yearly or 150 hours; 17/18 kW models | |
| Oil filter (17/18RES) | Replace | 150 hr | 12 mo | Yearly or 150 hours |
| Spark plugs | Clean | 150 hr | Yearly or hours shown; 17/18 kW models | |
| Spark plugs (17/18 kW) | Replace | 150 hr | Yearly or 150/300 hours | |
| Oil filter | Replace | 200 hr | 12 mo | Yearly or 200 hours; 8.5/12 kW models |
| Replace filter (oil filter) | Replace | 200 hr | Yearly or 200 hours (8.5/12 kW models) | |
| Air cleaner service | Change | 300 hr | Yearly or hours shown; 17/18 kW models | |
| Spark plugs | Check | 300 hr | Yearly or 300 hours; 8.5/12 kW models | |
| Spark plugs | Replace | 300 hr | Yearly or hours shown; 17/18 kW models | |
| Spark plugs (8.5/12 kW) | Replace | 300 hr | Yearly or 300 hours | |
| Spark plugs (8.5/12RES) | Check | 300 hr | 12 mo | Yearly or 300 hours |
| Crankcase breather hose | Check | 500 hr | 12 mo | Yearly or 500 hours; 8.5/12 kW models |
| Replace stepper motor coupling and bushing | Replace | 500 hr | 500 hours; authorized distributor/dealer only | |
| Stepper motor coupling and bushing | Replace | 500 hr | Authorized distributor/dealer only; 8.5/12 kW models | |
| Wire-cable insulation condition | Inspect | 500 hr | 36 mo | 3 years or 500 hours |
| Wire-cable insulation condition | Test | 500 hr | 3 Years or 500 hours; 8.5/12 kW models | |
| Air ducts, louvers | Clean | 12 mo | Yearly | |
| Battery and rack | Clean | 12 mo | Yearly; remove corrosion, clean and dry | |
| Battery charger operation, charge rate | Check | 1 mo | Monthly | |
| Battery electrolyte level and specific gravity | Check | 12 mo | Yearly; not necessary for maintenance-free batteries | |
| Battery terminals | Clean | 12 mo | Yearly; clean and tighten | |
| Brushes and collector ring | Inspect | 12 mo | Yearly; authorized distributor/dealer only | |
| Control and power wiring connections | Other | 12 mo | Yearly; tighten | |
| Exhaust insulation, fire hazards | Inspect | 12 mo | Yearly | |
| Flexible fuel lines and connections | Inspect | 3 mo | Quarterly; replace as necessary | |
| Fuel piping | Inspect | 12 mo | Yearly | |
| Generator visible wear or damage | Inspect | 3 mo | Quarterly | |
| Interior of sound enclosure | Inspect | 3 mo | Quarterly |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Service specifications
42| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Gap | Spark Plug Gap 12/17/18RES | 0.76 | mm (0.030 in.) | |
| Gap | Spark Plug Gap 8.5kW | 0.51 | mm (0.020 in.) | |
| Gap | Spark plug gap | 0.51 | mm | |
| Gap | Spark plug gap | 0.76 | mm | |
| Other | Fuel system leak test pressure | 6-8 ounces per square inch (10-14 inches water column) | oz/in² | LPG vapor or natural gas system |
| Other | Overfrequency shutdown threshold | 110 | % of system frequency setpoint | more than 5 seconds, active 10s after start |
| Other | Underfrequency shutdown threshold | 54 | Hz | more than 5 seconds (or below 56.5 Hz for more than 60 seconds) |
| Pressure | Gas fuel system leak test pressure | 6--8 | ounces per square inch (10--14 inches water column) | fuel system test pressurized; use soap and water solution without ammonia or chlorine |
| Speed | Crank cycle | 15 | seconds crank and 15 seconds off, 3 attempts | starting |
| Speed | Crank cycle | 15 seconds crank and 15 seconds off, 3 attempts | seconds | |
| Speed | Cut-in frequency | 47.5 | Hz | 50 Hz units |
| Speed | Cut-in frequency | 57.5 | Hz | 60 Hz units |
| Speed | Overfrequency shutdown threshold | 110% of system frequency setpoint for more than 5 seconds | % | active 10 seconds after engine start |
| Speed | Overspeed shutdown threshold | 110 | % of normal running speed | more than 0.3 seconds |
| Speed | Overspeed shutdown threshold | 110% of normal running speed for more than 0.3 seconds | % | |
| Speed | Rated engine speed | 3000 | rpm | 50 Hz operation |
| Speed | Rated engine speed | 3600 | rpm | 60 Hz operation |
| Speed | Underfrequency shutdown threshold | below 54 Hz for more than 5 seconds; below 56.5 Hz for more than 60 seconds | Hz | active 10 seconds after engine start |
| Temperature | Battery heater thermostat ON / OFF | 16-18 °C (60-65 °F) on; 27 °C (80 °F) off | °C | |
| Temperature | Carburetor heater thermostat OFF | 16 ± 3 | °C | 60 ± 5 °F |
| Temperature | Carburetor heater thermostat ON | 4 ± 3 | °C | 40 ± 5 °F |
| Torque | Spark Plug Torque | 24.4-29.8 | Nm (18-22 ft. lb.) | |
| Torque | Spark plug | 18-22 | ft. lb. | |
| Torque | Spark plug | 24.4--29.8 | Nm (18--22 ft. lb.) | |
| Torque | Spark plug | 24.4-29.8 | Nm | |
| Voltage | Battery charger charging voltages (red/green LED) | 11.8-14.0 V (bulk 6 A); 14.0-14.5 V (absorption 1.5-5 A); 13.0-13.6 V (float 0.1-1.5 A) | VDC | 6-amp RES charger |
| Voltage | Battery charger output (RES, 6 Amp) | 12 | VDC @ 6 Amps | INPUT 115 VAC 50/60Hz @ 1.6A |
| Voltage | Battery charger output (TRES, 2.5 Amp) | 13.2 | VDC | verify with battery disconnected |
| Voltage | Battery charger output, 6-amp RES | 12 | VDC | @ 6 Amps; input 115 VAC 50/60Hz @ 1.6A; max battery 180 Amp Hr. |
| Voltage | Digital voltage regulation | ±1.5 | % RMS | no-load to full-load |
| Voltage | High battery voltage warning threshold | 16 | VDC | more than 30 seconds while engine running |
| Voltage | High battery voltage warning threshold | above 16 | VDC | for more than 30 seconds when engine is running; not operative during crank cycle |
| Voltage | Low battery voltage warning threshold | 11 | VDC | more than 30 seconds while engine not running |
| Voltage | Low battery voltage warning threshold | below 11 | VDC | for more than 30 seconds when engine is not running; not operative during crank cycle |
| Voltage | Overvoltage shutdown threshold | 120 | % of system nominal voltage | more than 2 seconds |
| Voltage | Overvoltage shutdown threshold | 120% of system nominal voltage for more than 2 seconds | % | |
| Voltage | Undervoltage shutdown threshold | 80 | % of nominal system voltage | more than 10 seconds |
| Voltage | Undervoltage shutdown threshold | 80% of nominal system voltage for more than 10 seconds | % | |
| Voltage | Voltage change per step (coarse), ADC parameter 1P | 5 | VAC | measured voltage 85-132 VAC |
| Voltage | Voltage change per step (coarse), ADC parameter 1P | 7 | VAC | measured voltage 180-251 VAC |
| Voltage | Voltage change per step (fine), ADC parameter 1P | 0.5 | VAC | measured voltage 85-132 VAC |
| Voltage | Voltage change per step (fine), ADC parameter 1P | 0.7 | VAC | measured voltage 180-251 VAC |
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 |
|---|---|---|---|---|---|
| Engine oil | 5W-30 | API SG, SH, or SJ synthetic | Synthetic oil recommended | ||
| Fuel | LPG | Fuel supply pressure 1.7-2.7 kPa (7-11 in H2O); nominal fuel rating 2500 Btu/ft3 (93 MJ/m3); supply inlet 1/2 NPT | |||
| Fuel | Natural Gas | Fuel supply pressure 1.3-2.7 kPa (5-11 in H2O) for 8.5/12RES, 1.7-2.7 kPa (7-11 in H2O) for 18RES; nominal fuel rating 1000 Btu/ft3 (37 MJ/m3); supply inlet 1/2 NPT | |||
| Fuel | Natural gas or propane (LP) vapor | Field-convertible multi-fuel; CARB emission certified | Clean-burning natural gas or propane (LP) vapor; air-cooled engine, no liquid coolant | ||
| Other | Bicarbonate of soda (baking soda) and water solution | Battery acid cleanup: 500 g (1 lb.) bicarbonate of soda to 4 L (1 gal.) water; also used to clean battery and cables | |||
| Other | Petroleum jelly, silicone grease, or other nonconductive grease | Coat battery terminals after reconnecting cables |
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
11| Code | Name | Meaning | Severity | Action |
|---|---|---|---|---|
| AF | Auxiliary fault input shutdown | Shutdown initiated by pushing the emergency stop switch (TRES models only). Not used on RES models. | Shutdown | Check the position of the emergency stop button. (TRES models only) |
| HB | High battery voltage warning | Fault code is displayed if the engine starting battery voltage rises above 16 VDC for more than 30 seconds when the engine is running. Not operative during the engine crank cycle; does not inhibit engine starting. Clears when the battery voltage returns to an acceptable level. | Warning | Check the battery rating and condition; check battery charger operation. |
| HE | High engine temperature shutdown | Shutdown occurs if the engine coolant temperature exceeds the maximum temperature for more than 5 seconds. This function becomes active after the engine reaches the crank disconnect speed. | Shutdown | Check for blocked air inlets and exhaust outlets. |
| LB | Low battery voltage warning | Fault code is displayed if the engine starting battery voltage falls below 11 VDC for more than 30 seconds when the engine is not running. Not operative during the engine crank cycle; does not inhibit engine starting. Clears when the battery voltage returns to an acceptable level. | Warning | Check the battery rating and condition; check battery charger operation; charge or replace battery. |
| LOP | Low oil pressure shutdown | Shutdown occurs if a low oil pressure condition exists for more than 5 seconds. This function becomes active 30 seconds after the engine has reached crank disconnect speed (30 second inhibit). The low oil pressure shutdown does not protect against low oil level. | Shutdown | Check for leaks in the lubrication system. Check the oil level and add oil if the level is low. |
| OC | Overcrank shutdown | Shutdown occurs after 3 unsuccessful starting attempts. The crank cycle is set for three starting attempts of 15 seconds cranking and 15 seconds rest. The generator set also shuts down on OC if no engine rotation is sensed during cranking; shuts down 3 seconds after the fault is detected (locked rotor). | Shutdown | Check the fuel supply, spark plug, and battery. Check for loose connections. Contact an authorized distributor/dealer for service if problem continues. |
| OF | Overfrequency shutdown | Shutdown occurs when the governed frequency exceeds 110% of the system's frequency setpoint for more than 5 seconds. This function becomes active 10 seconds after engine start (10 second inhibit). | Shutdown | Contact an authorized distributor/dealer for service if problem continues. |
| OS | Overspeed shutdown | Shutdown occurs if the engine speed exceeds 110% of the normal running speed for more than 0.3 seconds. | Shutdown | Contact an authorized distributor/dealer for service if problem continues. |
| OU | Overvoltage shutdown | Shutdown occurs if voltage exceeds 120% of system nominal voltage for more than 2 seconds. | Shutdown | Contact an authorized distributor/dealer for service if problem continues. |
| UF | Underfrequency shutdown | Shutdown occurs if the governed frequency falls below 54 Hz for more than 5 seconds. Shutdown also occurs if the governed frequency falls below 56.5 Hz for more than 60 seconds. This function becomes active 10 seconds after engine start (10 second inhibit). | Shutdown | Reduce the load and restart the generator set. Contact an authorized distributor/dealer for service if problem continues. |
| UU | Undervoltage shutdown | Shutdown occurs if voltage falls below 80% of nominal system voltage for more than 10 seconds. | Shutdown | Reduce the load and restart the generator set. Contact an authorized distributor/dealer for service if problem continues. |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
12Frequency Adjustment Procedure adjustment
Tools: frequency meter
- Attach a frequency meter to the AC output leads or an outlet on the load side of the generator set.
- Start and run the generator set, then adjust engine governor speed to set output frequency (3600 rpm for 60 Hz, 3000 rpm for 50 Hz).
Voltage Adjustment Procedure adjustment
Tools: digital multimeter
- With the generator set off, connect a digital multimeter to the output leads or an outlet on the load side; set meter to AC voltage.
- Start the generator set by moving the master switch to RUN.
- Use the ADC controller to adjust the voltage (parameter 1P) until output voltage reaches the desired value.
- Adjust the voltage stability (gain, parameter 2P) to minimize light flicker.
- Readjust the voltage if necessary.
- Set the multimeter to measure frequency.
- Adjust engine speed to the cut-in frequency (57.5 Hz for 60 Hz units, 47.5 Hz for 50 Hz units) via engine governor speed (parameter 4P).
- Adjust the volts/Hz (parameter 3P) until voltage begins to drop as load is applied at cut-in frequency.
- Reset engine speed to operating frequency (50 or 60 Hz) via parameter 4P.
- Readjust voltage stability (parameter 2P) if necessary.
- Readjust voltage (parameter 1P) if necessary.
- Save settings.
- Stop the generator set.
Resetting Controller after a Fault Shutdown diagnostic
- Move master switch to OFF/RESET
- Disconnect generator set from load using line circuit breaker or ATS
- Identify and correct the cause of the fault shutdown
- Start generator set by moving master switch to RUN; test operate
- Move master switch to OFF/RESET
- Reconnect generator set to load
- Move master switch to AUTO for remote start
Battery Cleaning and Terminal Service maintenance
⚠ Battery electrolyte is a diluted sulfuric acid; wear splashproof safety goggles, rubber gloves, and boots.
⚠ Remove the negative (--) lead first when disconnecting the battery.
Tools: Wire brush
- Disconnect the cables from the battery.
- Scrub the terminals with a wire brush to remove corrosion.
- Clean the battery and cables with a solution of baking soda and water.
- Flush the battery and cables with clean water and wipe with a dry, lint-free cloth.
- Reconnect the battery cables and coat terminals with petroleum jelly, silicone grease, or other nonconductive grease.
Oil Change Procedure maintenance
⚠ Drain oil while still warm
Tools: oil filter wrench
- Place generator set master switch to OFF
- Disconnect power to battery charger
- Disconnect starting battery, negative lead first
- Remove housing side panel
- Clean area around dipstick and oil fill cap
- Remove oil drain hose from clip, remove cap, lower hose into container
- Open oil drain valve on engine
- Remove dipstick and oil fill cap, drain completely
- Close oil drain valve; replace cap and hose in clip
- Replace dipstick
- Remove oil filter by rotating counterclockwise
- Clean gasket sealing surface
- Apply light oil coat to new filter's rubber seal and install
- Fill engine to F mark on dipstick
- Reinstall dipstick and oil fill cap
Oil Cooler Cleaning (17/18 kW) maintenance
Tools: Brush, Compressed air
- Remove the top mounting screw and loosen the two side screws.
- Lift off the cylinder shroud to access the oil cooler under the No. 2 cylinder shroud.
- Clean the outside of the oil cooler fins with a brush or with compressed air.
- Keep the oil cooler free of debris.
Paper Element Service (Air Cleaner) maintenance
⚠ Do not wash the paper element or clean it with pressurized air, as this will damage the element.
- Place master switch in OFF/RESET; disconnect battery charger power and battery (negative lead first).
- Loosen retaining knob(s) and remove the cover.
- Remove element cover nut/element cover and the paper element with precleaner.
- Remove precleaner from the paper element.
- Replace the element if dirty, bent, or damaged.
- Check air cleaner base, cover and seal; clean base carefully so dirt does not enter intake throat.
- Reinstall paper element, precleaner, element cover, nut and cover; secure with retaining knob.
- Reconnect battery charger power and battery, negative (-) lead last.
Precleaner Service (8.5/12RES Air Cleaner) maintenance
- Place master switch to OFF/RESET
- Disconnect power to battery charger
- Disconnect battery, negative lead first
- Loosen cover retaining knob and remove cover
- Remove precleaner from paper element, wash in warm water with detergent, rinse and air dry
- Saturate precleaner with new engine oil, squeeze out excess
- Reinstall precleaner over paper element
- Reinstall air cleaner cover
- Reconnect battery charger power
- Reconnect battery negative lead last
Precleaner Service (8.5/12RES) maintenance
⚠ Service more often under extremely dusty or dirty conditions.
- Place master switch in OFF/RESET; disconnect battery charger power.
- Disconnect battery, negative (-) lead first.
- Loosen cover retaining knob and remove cover; remove precleaner from paper element.
- Wash precleaner in warm water with detergent; rinse thoroughly; squeeze out excess water and air dry.
- Saturate precleaner with new engine oil and squeeze out excess oil.
- Reinstall precleaner over the paper element; reinstall cover and secure with knob.
- Reconnect battery charger power and battery, negative (-) lead last.
Precleaner Service (Air Cleaner, 8.5/12RES) maintenance
- Place generator set master switch in the OFF/RESET position.
- Disconnect the power to the battery charger.
- Disconnect the battery, negative (--) lead first.
- Loosen cover retaining knob and remove cover; remove precleaner from paper element.
- Wash precleaner in warm water with detergent; rinse thoroughly until all detergent is eliminated.
- Squeeze out excess water (do not wring); allow the precleaner to air dry.
- Saturate the precleaner with new engine oil; squeeze out all excess oil.
- Reinstall the precleaner over the paper element.
- Reinstall the air cleaner cover and secure with the cover retaining knob.
- Reconnect the power to the battery charger.
- Reconnect the generator set engine starting battery, negative (--) lead last.
Spark Plug Service maintenance
Tools: wire feeler gauge, torque wrench
- Clean area around base of spark plug
- Remove spark plug and check condition; replace if worn
- Check spark plug gap with wire feeler gauge
- Adjust gap by bending ground electrode
- Reinstall spark plug and torque to 24.4-29.8 Nm (18-22 ft. lb.)
Storage Procedure maintenance
- Operate generator set to operating temperature (~15 min)
- Stop generator set
- Drain engine lubrication oil while warm
- Refill crankcase with oil
- Run for a few minutes to distribute oil
- Stop generator set
- Start generator set, shut off gas supply, run until engine stops
- Remove spark plugs, pour one tablespoon of oil into each hole, install plugs, ground leads
- Crank engine two or three revolutions to lubricate cylinders
- Clean exterior surface
- Seal openings with nonabsorbent tape
- Spread light oil film on unpainted metallic surfaces
- Disconnect battery, negative lead first; place in warm dry location; connect to float/equalize charger
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 |
|---|---|---|---|---|
| 120 VAC | Utility Power terminals on field-connection terminal block | Utility power circuit must be backed up by the generator set |
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
How many kW is the Kohler 18TRES?
The Kohler 18TRES is rated 18 kW standby.
What engine does the Kohler 18TRES use?
The Kohler 18TRES is powered by the Kohler CH 980 engine.
What kind of fuel does the Kohler 18TRES run on?
The Kohler 18TRES runs on natural gas or propane (LP) vapor.
How much oil does the Kohler 18TRES take?
The Kohler CH 980 engine in the Kohler 18TRES has an oil capacity of 2.8 liters.
How many cold cranking amps does the Kohler 18TRES require?
The Kohler 18TRES uses 1 battery, 12 V each, 500 CCA, per the manufacturer specification sheet.
What oil filter fits the Kohler 18TRES?
The Kohler 18TRES uses oil filter part number 52 050 02-S.
What air filter fits the Kohler 18TRES?
The Kohler 18TRES uses air filter part number 62 083 01-S.
Troubleshooting
6Fault codes
| Code | Meaning | Cause | Remedy |
|---|---|---|---|
| AF | Indicates a shutdown initiated by pushing the emergency stop switch. | Not used on RES models. | Check the position of the emergency stop button. (TRES models only) |
| HE | High engine temperature shutdown | Shutdown occurs if the engine coolant temperature exceeds the maximum temperature for more than 5 seconds. This function becomes active after the engine reaches the crank disconnect speed. | Check for blocked air inlets and exhaust outlets. |
| LOP | Low oil pressure shutdown | Shutdown occurs if a low oil pressure condition exists for more than 5 seconds. This function becomes active 30 seconds after the engine has reached crank disconnect speed (30 second inhibit). Note: The low oil pressure shutdown does not protect against low oil level. Check the oil level at the engine. | Check for leaks in the lubrication system. Check the oil level and add oil if the level is low. |
| OC | Overcrank shutdown | Shutdown occurs after 3 unsuccessful starting attempts. The crank cycle is set for three starting attempts of 15 seconds cranking and 15 seconds rest. | Check the fuel supply, spark plug, and battery. Check for loose connections. Contact an authorized distributor/dealer for service if problem continues. |
| Locked rotor | The generator set also shuts down on OC if no engine rotation is sensed during cranking. Shuts down 3 seconds after the fault is detected. | ||
| OF | Overfrequency shutdown | Shutdown occurs when the governed frequency exceeds 110% of the system’s frequency setpoint for more than 5 seconds. This function becomes active 10 seconds after engine start (10 second inhibit). | Contact an authorized distributor/dealer for service if problem continues. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Kohler 18TRES troubleshooting guide (25 entries) →
Repair guides
12- Battery Cleaning and Terminal Service
- Exercising Generator Set
- Oil Change Procedure
- Oil Cooler Cleaning (17/18 kW)
- Paper Element Service (Air Cleaner)
- Precleaner Service (8.5/12RES Air Cleaner)
- Precleaner Service (8.5/12RES)
- Precleaner Service (Air Cleaner, 8.5/12RES)
- Resetting Controller after a Fault Shutdown
- Resetting Emergency Stop Switch (TRES Models only)
- Storage Procedure (three months or longer)
- Voltage Adjustment Procedure
Step-by-step procedures compiled from the Kohler service manual for this model.
Parts
16| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 25 158 08-S | Bushing, linkage retaining | 4 | Bushing | buy |
| 25 435 06-S | Kit, starter solenoid | 1 | Kit | buy |
| 358358 | Coupling, stepper motor | 4 | Coupling | Amazon eBay |
| 52 050 02-S | Filter, oil | 1 | Oil filter | Amazon eBay |
| 52 099 08-S | Switch, oil pressure | 1 | Sensor | buy |
| 62 083 01-S | Element, air filter | 1 | Air filter | buy |
| 62 132 04-S | Spark plug | 2 | Spark plug | buy |
| GM28823 | Sensor, oil temperature | 1 | Sensor | Amazon eBay $50.00 |
| RSP-FT-03-US-01 | Pack first: complete service kit comprising air filter, air pre filter, spark plugs and oil filter. | Air filter | Amazon eBay | |
| RSP-FT-05-US-01 | Pack first: complete service kit comprising air filter, air pre filter, spark plugs and oil filter. | Air filter | Amazon eBay | |
| 223316 | Fuse, 10 A, 250 V | 1 | Service part / kit | Amazon eBay $31.37 |
| 292937 | Fuse, 20 A, 250 V | 1 | Service part / kit | Amazon eBay $31.78 NAPA $17.36 |
| AGS-10 | AGS 10 inline fuse, battery charger (located in the battery lead) | 1 | Service part / kit | eBay |
| GM58703 | Assy, J1939/ModBus/Ethernet Converter (network bridge) | 1 | Service part / kit | eBay |
| GM62347 | Kit, Resi Maint (17RES) (4/cs) | 1 | Service part / kit | eBay $99.60 |
| X-634-28 | Bushing | 1 | Service part / kit | eBay |
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.
Available documents
Operator's manual (Kohler)Operator's manual — 12 RES Operation (Kohler)Operator's manual — tp6515 (Kohler)Reference — tp6514 (Kohler)Parts manual — tp6518 (Kohler)Service manual — tp6792 (Kohler)
This page was generated from the 6 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.