Service parts for the 10RY
Grouped by system, with how many of each the parts manual calls for.
Oil system
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | LP Gas or Natural Gas |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 10 kW |
| Controller | relay |
| Oil capacity | 2.8 L |
| Alternator | 4H5 (RY) |
| Voltage options | 120/240 V, 127/220 V, 220/380 V |
| Phase | 1 |
| Power factor | 1.0 |
| Battery cranking | 235 CCA |
| Battery voltage | 12 V |
| Battery quantity | 1 |
| Coolant capacity | 3.5 L |
| Max ambient | 50 °C |
| Dry weight | 263 kg |
Maintenance & consumables
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Oil filter | 279218 | Amazon eBay $18.91 NAPA $12.22 |
Service intervals
35| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Engine oil | Change | 50 hr | 12 mo | 50 or Y |
| Oil filter(s) | Replace | 50 hr | 12 mo | 50 or Y; service more frequently in dusty areas |
| Blow dust out of generator | Clean | 300 hr | 2 Y or 300; more often in dusty conditions | |
| Air cleaner element | Replace | 400 hr | 6 mo | S |
| Bolt torque | Adjust | 500 hr | 3 Y or 500 | |
| Valve clearance | Adjust | 500 hr | 3 Y or 500 | |
| Wire-cable insulation breakdown | Test | 500 hr | 3 Y or 500 | |
| Brushes | Replace | 1000 hr | replace as necessary | |
| Battery charger operation, charge rate | Check | 1 mo | M | |
| Battery electrolyte level | Check | 1 mo | M | |
| Battery specific gravity, charge state | Test | 1 mo | M | |
| Bearing condition | Inspect | 12 mo | Y; replace as necessary | |
| Choke, carburetor adjustment | Adjust | 6 mo | S | |
| Circuit breakers, fuses | Test | 1 mo | M | |
| Clean and tighten battery terminals | Clean | 3 mo | Q | |
| Coolant | Change | 12 mo | Y | |
| Crankcase breather | Clean | 3 mo | Q; 10/12 kW also 100 h | |
| Exciter | Test | 12 mo | Y | |
| Fuel filter(s) | Change | 3 mo | Q | |
| Fuel piping | Inspect | 12 mo | Y | |
| Gasoline supply | Replace | 6 mo | S | |
| Governor operation, lubricate moving parts | Lubricate | 1 mo | M | |
| Ignition components | Inspect | 12 mo | Y | |
| Measure and record winding resistance with Megger | Test | 12 mo | Y | |
| Radiator exterior | Clean | 12 mo | Y | |
| Recharge after engine start | Check | 1 mo | M | |
| Remove corrosion, clean and dry battery and rack | Clean | 1 mo | M | |
| Run generator set | Test | 1 mo | M | |
| Safety and alarm operation | Test | 6 mo | S | |
| Tighten DC electrical connections | Adjust | 6 mo | S | |
| Tighten control and power wiring connections | Adjust | 12 mo | Y | |
| Transfer switch main contacts | Inspect | 12 mo | Y | |
| Voltage regulator | Test | 12 mo | Y | |
| Voltage-sensing device/relay adjustment | Adjust | 12 mo | Y | |
| Wire abrasions where subject to motion | Inspect | 3 mo | Q |
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
59| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Gap | Kohler governor magnetic pickup air gap | 1.02 ±0.127 | mm | 0.040 ±0.005 in. |
| Gap | Magnetic pickup air gap | 0.51--1.27 | mm | 0.020--0.050 in. |
| Gap | Magnetic pickup air gap, A-249922 | 0.37 ±0.127 | mm | 0.015 ±0.005 in. |
| Other | Battery cold cranking amps, above -1.1 C | 235 minimum | CCA | above -1.1 C (30 F) |
| Other | Battery cold cranking amps, below -1.1 C | 400 minimum | CCA | below -1.1 C (30 F) |
| Other | Battery specific gravity, fully charged | 1.260 | at 26.7 C (80 F) | |
| Other | Battery specific gravity, recharge threshold | 1.215 | at 26.7 C (80 F) | |
| Other | Belt tension, new belt | 36--46 | kg | 79--101 lb. |
| Other | Belt tension, used belt | 25--34 | kg | 56--75 lb.; used after 10 min operation |
| Pressure | Anticipatory low oil pressure switch | 138 ±14 | kPa | prealarm |
| Pressure | Low oil pressure fault, 5-light controller | 49 | kPa | 7.1 psi |
| Pressure | Low oil pressure shutdown switch | 103 ±14 | kPa | |
| Pressure | Operating oil pressure | 276--414 | kPa | 18 kW; 40--60 psi |
| Pressure | Operating oil pressure | approximately 150 | kPa | 10/12 kW; 21.7 psi |
| Resistance | Exciter armature resistance | 0.6--0.8 | ohm | continuity |
| Resistance | Exciter field resistance | 4.5 ±10% | ohm | cold |
| Resistance | Exciter field resistance | 5.0 ±5% | ohm | cold |
| Resistance | Main field (rotor) resistance | 6.0--7.4 | ohm | cold |
| Resistance | Main field (rotor) resistance | 7.0--8.6 | ohm | cold |
| Resistance | Oil pressure sender at 0 kPa (0 psi) | 240 ±10% | ohm | 0 kPa (0 psi) |
| Resistance | Oil pressure sender at 345 kPa (50 psi) | 103 ±10% | ohm | 345 kPa (50 psi) |
| Resistance | Oil pressure sender at 690 kPa (100 psi) | 33 ±10% | ohm | 690 kPa (100 psi) |
| Resistance | Rotor resistance | 2.8±10% | ohm | cold |
| Resistance | Rotor resistance | 3.9±10% | ohm | cold |
| Resistance | Stator winding 1--2, 3--4 | 0.05 | ohm | cold; ±10% |
| Resistance | Stator winding 1--2, 3--4 | 0.06 | ohm | cold; ±10% |
| Resistance | Stator winding 1--4, 2--5, 3--6, etc. | 0.04 | ohm | cold; ±10% |
| Resistance | Stator winding 1--4, 2--5, 3--6, etc. | 0.19 | ohm | cold; ±10% |
| Resistance | Stator winding 33--44 | 0.05 | ohm | cold; ±10% |
| Resistance | Stator winding 33--44 | 0.06 | ohm | cold; ±10% |
| Resistance | Stator winding 55--33 | 1.10 | ohm | cold; ±10% |
| Resistance | Stator winding 55--33 | 1.26 | ohm | cold; ±10% |
| Resistance | Stator winding 55--66 | 1.30 | ohm | cold; ±10% |
| Resistance | Stator winding 55--66 | 1.40 | ohm | cold; ±10% |
| Resistance | Water temperature sender at 104 C (220 F) | 47 | ohm | 104 C (220 F) |
| Resistance | Water temperature sender at 38 C (100 F) | 450 | ohm | 38 C (100 F) |
| Resistance | Water temperature sender at 71 C (160 F) | 130 | ohm | 71 C (160 F) |
| Speed | Governor speed | 1500 | rpm | 50 Hz |
| Speed | Governor speed | 1800 | rpm | 60 Hz |
| Speed | Relay controller overspeed shutdown | 62 | Hz | 50 Hz models; 1860 rpm |
| Speed | Relay controller overspeed shutdown | 72 | Hz | 60 Hz models; 2160 rpm |
| Temperature | Anticipatory high engine temperature switch | 121±4 | °C | prealarm |
| Temperature | Coolant freezing protection, 50% ethylene glycol | -37 | °C | -34 F |
| Temperature | Coolant overheating protection, 50% ethylene glycol | 129 | °C | 265 F |
| Temperature | High engine temperature shutdown switch | 103±4 | °C | |
| Temperature | Thermostat opening temperature | 91 | °C | 195 F; wet exhaust manifold |
| Temperature | Thermostat test temperature | 93 | °C | 199 F |
| Temperature | Thermostat wide open temperature | 104 | °C | 219 F |
| Torque | Drive disc to flywheel | 19 | Nm | 10/12RY/RFY; 168 in. lb. |
| Torque | Drive disc/rotor nuts | 7.9 | Nm | 10/12RY/RFY; 70 in. lb. |
| Torque | Drive discs and rotor to flywheel | 65 | Nm | 18RY/RFY/RZ/RFZ; 50 ft. lb. |
| Torque | Intake manifold bolts | 16--20 | Nm | 10/12 kW; 12--15 ft. lb. |
| Torque | Overbolt torque | 24.4 | Nm | 18RY/RFY/RZ/RFZ; 216 in. lb. |
| Torque | Overbolt torque | 6.8 | Nm | 10/12RY/RFY; 60 in. lb. |
| Voltage | Kohler governor magnetic pickup voltage during cranking | 1.75 minimum | V AC | during engine cranking |
| Voltage | Magnetic pickup signal voltage | approximately 7 | V DC | engine running |
| Voltage | Magnetic pickup supply voltage | approximately 9.5 | V DC | master switch OFF/OFF-RESET |
| Voltage | PowerBoost III/IIIE voltage adjustment range | 100--130 | V | |
| Voltage | PowerBoost V voltage adjustment range | 190--270 | V | line-to-line |
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 |
|---|---|---|---|---|---|
| Coolant | 50% ethylene glycol and 50% clean, softened water | permanent-type coolant | above -37°C | 11.8 L | Freezing protection to -37 C (-34 F), overheating protection to 129 C (265 F); 10/12 kW capacity. |
| Fuel | LP gas or natural gas | LP liquid withdrawal system available as accessory. | |||
| Fuel | regular grade unleaded gasoline with pump sticker octane rating 87 or higher | gasohol max 10% ethanol; methanol max 5% with cosolvents and corrosion inhibitors |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
12Drive Belt Tension Adjustment adjustment
Tools: belt tension gauge
- Check belt tension with belt tension gauge.
- Loosen alternator and/or governor mounting and adjusting bolts.
- Move component away from engine until correct tension.
- Retighten mounting bolts.
Electronic Governor Adjustment adjustment
Tools: frequency meter or tachometer
- Verify actuator swivel fully threaded and secured.
- Back out idle adjust screw.
- Snap linkage back to idle and listen for click.
- Turn threaded rod 1/2 turn at a time until sharp click.
- Set actuator rod about 90 degrees to throttle lever at no load rated rpm.
- Tighten ball joint locknuts.
- Select 50 Hz or 60 Hz with jumper; do not jumper for 60 Hz.
- Adjust gain at full load until stable at all loads.
Gasoline Carburetor Adjustment adjustment
⚠ Do not force idle speed mixture screw.
- With engine stopped, turn idle mixture screw in until lightly seated.
- Turn idle mixture screw out 1-3/4 turns.
- Start engine and run at no load about 5 minutes.
- Adjust idle mixture screw ±3/8 turn for best stability.
- Stop generator set.
- Adjust governed speed via electronic governor if incorrect.
Gasoline Choke Adjustment adjustment
- Loosen screws securing choke bracket.
- Shift choke assembly position.
- Set choke plate within 10 degrees of full-closed at about 21 C (70 F).
LP/Natural Gas Conversion adjustment
- Remove retaining screw from underside of gas regulator.
- Remove retainer and internal spring for LP gas operation.
- Reinstall retaining screw.
- Save spring and retainer for conversion back to natural gas.
- For natural gas, replace spring and retainer.
- Rotate spring retainer to obtain 5 in. water column at full load.
12-Lead Separate Excitation diagnostic
⚠ Observe hazardous voltage precautions.
Tools: DC ammeter, 10-amp fuse, 12-volt automotive battery
- Disconnect all leads from voltage regulator.
- Remove exciter field F1 and F2 leads from terminal strip.
- Connect ammeter and 10-amp fuse in series with F1 to 12-volt battery.
- Record ammeter reading; expected battery voltage divided by exciter resistance.
- Start engine and check ammeter remains stable.
- Check AC output across stator leads against specification.
- If rotor and stator test good, replace voltage regulator.
4-Lead Separate Excitation diagnostic
⚠ Observe hazardous voltage precautions.
Tools: DC ammeter, 10-amp fuse, 12-volt automotive battery
- Disconnect all leads from voltage regulator.
- Connect DC ammeter, 10-amp fuse, and 12-volt battery to brush leads.
- Record ammeter reading; expected battery voltage divided by rotor resistance.
- Start engine and check ammeter remains stable.
- Check AC output across stator leads against specification.
- If rotor and stator test good, replace voltage regulator.
PowerBoost III/IIIE Voltage Regulator Test diagnostic
⚠ Do not touch voltage regulator heat sink when testing.
Tools: Variable transformer 0--140 V, AC voltmeter, 120-volt 100-watt lamp
- Connect variable transformer, AC voltmeter, regulator, and 120-volt lamp.
- Set variac to zero and plug in.
- Increase to 100 volts; lamp should light.
- Increase to 120 volts; lamp should go out.
- If lamp behavior fails, replace voltage regulator.
Battery Cleaning maintenance
⚠ Do not let cleaning solution enter battery cells.
Tools: wire brush
- Disconnect cables; remove negative lead first.
- Remove corrosion with wire brush from posts and connectors.
- Clean battery and cables with baking soda and water solution.
- Flush with clean water and wipe dry.
- Reconnect cables and coat terminals with petroleum jelly.
Battery Electrolyte Level Check maintenance
⚠ Do not add fresh electrolyte.
- Remove filler caps.
- Check electrolyte level is up to bottoms of filler holes.
- Refill with distilled or clean tap water as necessary.
- Tighten filler caps.
Battery Specific Gravity Check maintenance
Tools: battery hydrometer
- Draw electrolyte from each cell into hydrometer.
- Read number at top of electrolyte level.
- Fully charged is 1.260 at 26.7 C (80 F).
- Charge battery if below 1.215 at 26.7 C (80 F).
- Correct reading for electrolyte temperature if needed.
Cooling System Drain and Refill maintenance
⚠ Allow engine to cool before removing pressure cap.
- Remove radiator cap and open radiator petcock and engine block drain.
- Drain coolant.
- Close drain plug and petcock.
- Fill radiator with recommended coolant mixture.
- Run engine until thermostat opens and upper hose is hot.
- Stop engine, allow cooling, and add coolant to 19--38 mm below filler neck.
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 |
|---|---|---|---|---|
| 100-120 | 1 | 4-lead, 2 wire | L1; L0 | Single-pole circuit breaker; CT2 not used |
| 100-120 | 1 | 4-lead, 3 wire | L0-L1; L0-L2 | 60/50 Hz; jumper lead used; factory two-pole or two 1-pole circuit breakers |
| 100-120/200-240 | 1 | 4-lead, 3 wire | L0-L1; L0-L2; L1-L2 | 60/50 Hz; jumper lead not used |
| 120/240 (60 Hz); 110/220 (50 Hz) | 1 | 12-lead, 3 wire | Used on generators 20-100 kW only | |
| 120/240 (60 Hz); 110/220 (50 Hz) | 3 | 12-lead, 4 wire delta | ||
| 120/240 or 120/208 (60 Hz); 120/208 or 110/190 (50 Hz) | 3 | 12-lead, 4 wire low wye | ||
| 200-240 | 1 | 4-lead, 2 wire | L1; L0 | Single-pole circuit breaker; CT2 not used |
| 277/480 (60 Hz); 220/380 (50 Hz) | 3 | 12-lead, 3 wire high wye | ||
| 600 | 3 | 6-lead stator | 600 volt |
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 size generator is the Kohler 10RY?
The Kohler 10RY is rated 10 kW standby.
What fuel type does the Kohler 10RY take?
The Kohler 10RY runs on LP Gas or Natural Gas.
How much coolant does the Kohler 10RY hold?
The Kohler 10RY cooling system holds 3.5 liters (0.9 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
What is the oil capacity of the Kohler 10RY?
The Kohler 10RY has an engine oil capacity of 2.8 liters (3.0 US quarts), per the manufacturer specification sheet.
How much does the Kohler 10RY weigh?
The Kohler 10RY has a dry weight of 263 kg (579 lb).
What voltage does the Kohler 10RY produce?
The Kohler 10RY is offered in 120/240 V, 127/220 V, 220/380 V, 1-phase.
How many cold cranking amps does the Kohler 10RY require?
The Kohler 10RY uses 1 battery, 12 V each, 235 CCA, per the manufacturer specification sheet.
Which alternator is fitted to the Kohler 10RY?
The Kohler 10RY uses a 4H5 (RY) alternator.
What oil filter does the Kohler 10RY use?
The Kohler 10RY uses oil filter part number 279218.
Repair guides
7- 12-Lead Separate Excitation
- 4-Lead Separate Excitation
- Battery Electrolyte Level Check
- Cooling System Drain and Refill
- Gasoline Carburetor Adjustment
- LP/Natural Gas Conversion
- PowerBoost III/IIIE Voltage Regulator Test
Step-by-step procedures compiled from the Kohler service manual for this model.
Parts
14| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 224300 | 2.75 in. (69.85 mm) Water Pump | Pump | Amazon eBay | |
| 224704 | Engine Gasket Kit - Complete | 1 | Gasket | Amazon eBay |
| 224705 | Engine Gasket Kit - Complete | 2 | Gasket | Amazon eBay $118.45 |
| 224706 | Engine Gasket Kit - Upper | 1 | Gasket | Amazon eBay |
| 224707 | Engine Gasket Kit - Upper | 1 | Gasket | Amazon eBay $206.92 |
| 224748 | Gasket, rear retainer | 1 | Gasket | Amazon eBay |
| 224749 | Gasket, rear retainer | 1 | Gasket | Amazon eBay |
| 224773 | Gasket, water pump | 1 | Pump | Amazon eBay $4.00 |
| 224782 | Seal, crankshaft rear | 1 | Seal | Amazon eBay $74.95 |
| 246058 | Gasket, fuel pump | 1 | Pump | Amazon eBay |
| 276192 | Seal, crankshaft rear | 1 | Seal | Amazon eBay |
| 279143 | Engine Gasket Kit - Lower | 1 | Gasket | Amazon eBay |
| 279145 | Engine Gasket Kit - Lower | 2 | Gasket | Amazon eBay |
| 326618 | 3.00 in. (76.20 mm) Water Pump | Pump | Amazon 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
Owner's manual — tp5870 (Kohler)Parts manual — tp5415 (Kohler)Service manual — 16953202-18RY (Kohler)Service manual — TP5110 Kohler Gen Service 5RMY 7RMY 10RY 15RMOY (02-1990) (Kohler)Service manual — sb527 (Kohler)Service manual — tp5110 (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.