Service parts for the 20ROZJ81
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
Ratings spec sheet not in our library yet — see the documents below.
Maintenance & consumables
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Fuel filter | Primary | 223414 | Amazon eBay $13.45 NAPA $34.79 | ||
| Fuel filter | Secondary | 223953 | Amazon eBay $80.00 NAPA $56.25 | ||
| Oil filter | 223673 | Amazon eBay $26.99 NAPA $35.41 KuduParts $14.00 |
Service intervals
15| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| System | Test | 1 hr | ToCI quarterly: exercise system under full load for 1 hour | |
| Battery | Test | 6 mo | Load-test battery at each semi-annual visit | |
| Coolant antifreeze | Change | 12 mo | NCCI/RCI: antifreeze change once per year during contract term | |
| Engine tune-up | Other | 12 mo | Annual: engine tune-up with parts | |
| Fuel filters | Change | 12 mo | Annual: change fuel filters | |
| Generator sets and associated systems | Inspect | 6 mo | Semi-annual inspection, testing and preventive maintenance (default unless Appendix A states otherwise) | |
| Load bank | Test | 12 mo | Annual four (4) hour load bank test / emergency service operation with four (4) hours full load test once per year | |
| Lube oil | Change | 12 mo | CMC/HCF: additional services on second visit - lube, oil and filter change | |
| Lube oil analysis | Test | 12 mo | Annual: lube oil analysis | |
| Oil | Change | 12 mo | NCCI/RCI: oil shall be changed once every 12 months | |
| Oil filter, fuel filter and air filter | Change | 12 mo | NCCI: change once every 12 months during the contract period | |
| Primary and bypass lube filters | Change | 12 mo | Annual: change primary and bypass lube filters | |
| Transfer switch | Lubricate | 12 mo | ToCI annual: check, clean and lubricate transfer switches and breakers | |
| Valve clearance | Adjust | 12 mo | ToCI annual: check valve clearance | |
| Water filters | Change | 12 mo | Annual: change water filters |
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
5| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Other | Exercise under full load | 1 | hour | ToCI quarterly |
| Other | Full load test duration | 4 | hours | Once per year |
| Other | Load bank data recording interval | 15 | minutes | During load bank test |
| Other | Load bank test load level | 80 | % of generator nameplate capacity | 4-hour resistive load bank test |
| Other | Load bank test profile | 2 hours at 50%, 1 hour at 75%, 1 hour at 100% | Annual four (4) hour load bank test |
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 | meeting manufacturer's specs | Add crankcase oil (grade meeting manufacturer's specs) to correct level (SCI) |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
11Automatic Transfer Switch Semi-Annual Service maintenance
- Verify proper operation of exerciser clock; adjust if necessary.
- Provide visual inspection of all contacts and connection points.
- Perform building load test if practical and inspect for proper transfer and re-transfer.
- Verify operation of all control lamps.
Battery and Battery Charger System Semi-Annual Service maintenance
- Clean all battery terminals; verify integrity of cables and connectors.
- Load-test battery.
- Measure specific gravity of each battery cell.
- Inspect electrolyte level and add fluid if necessary.
- Verify proper operation and float voltage of external battery charger.
- Verify and record output of engine alternator.
Controls Semi-Annual Service maintenance
- Verify and record output voltage and adjust voltage regulator, if necessary.
- Calibrate control meters.
- Verify and record output frequency and adjust governor, if necessary.
- Verify operation of all control panel lamps.
- Inspect for any loose connections, terminals or discoloration.
Coolant System Semi-Annual Service maintenance
- Inspect all clamps, verify condition of all hoses and identify any leaks.
- Verify proper operation of engine water jacket heater.
- Test coolant freeze point and verify coolant level.
- Test coolant additive package for proper corrosion inhibitors.
- Inspect belt condition and tension; correct as required.
- Inspect radiator core for visual blockage or obstructions.
- Inspect for proper operation of intake louvers.
- Verify proper operation of remote radiator and belt condition.
Cooling System Semi-Annual Service (SCI) maintenance
- Visual inspection of Radiator/Heat exchanger for leaks, damage and obstructions.
- Add coolant to correct level.
- Inspect radiator cap, gasket and sealing surface.
- Visual inspection of water pump and cooling system gaskets for leaks.
- Inspect belts for cracking and fraying.
- Check water jacket heater for proper operation and adjust thermostat setting as needed.
- Check belt tension.
- Inspect flexible water connections for cracking, leaks and pliability.
- Inspect pulleys for excessive wear.
- Analyze coolant for proper antifreeze percentage.
- Analyze coolant conditioner level and add supplemental coolant additive as needed.
- Tighten hose clamps as needed.
- Lubricate fan drive with bearing lubricant.
Engine Semi-Annual Service maintenance
- Verify and record oil pressure and water temperature.
- Test all safety shutdown circuits and alarms (overspeed, overcrank, low oil pressure, high water temp, low coolant level).
- Inspect air intake system (air filter, crankcase breather, turbocharger).
- Inspect muffler system and drain condensation trap; verify rain cap operation.
- Inspect engine starting system; verify cable integrity and connections.
- Inspect exhaust flex coupling and piping for leaks and proper connection.
- Check for abnormal vibration or noise.
- Inspect spark plugs, plug wires and distributor.
Fuel System Semi-Annual Service maintenance
- Inspect all fuel lines and hoses for leaks and general condition.
- Inspect day tank and float assembly for proper operation and leaks.
- Inspect fuel pump for leaks.
- Verify proper operation of governor and governor linkage.
- Check fuel level in primary supply tank.
- Drain water and sediment from fuel filter and fuel supply tanks.
Generator Semi-Annual Service maintenance
- Inspect and lubricate generator end bell bearing.
- Inspect brushes, brush holders and commutators.
- Inspect cooling screen and general condition of alternator.
- Inspect for abnormal vibration.
- Verify connections and insulation condition.
- Verify proper operation of shunt trip on mainline circuit breaker.
Lubrication System Semi-Annual Service (SCI) maintenance
- Add crankcase oil (grade meeting manufacturer's specs) to correct level.
- Inspect oil heater for proper operation and leaks.
- With engine running, check for excessive crankcase blow-by.
- Visually inspect front and rear crankshaft seals and lubrication system gaskets for leaks.
- Check crankcase breather, inspect hose and connections.
- Take oil sample and perform oil analysis.
Optional Load Bank Testing maintenance
- Perform 4-hour resistive load bank test at 80% of generator nameplate capacity.
- Record all performance data at fifteen minute intervals including oil pressure, water temperature, voltage and frequency.
- Identify proper operation of fuel system, cooling system and overall condition of engine/generator set.
- Load bank testing shall be performed with no interruption to the normal power supply.
Starting System Semi-Annual Service (SCI) maintenance
- Check electrolyte level and add as needed.
- Check and record battery charger amperage.
- Check battery charger and adjust float rate for optimum battery performance and life.
- With engine running, check and record alternator for proper charge rate.
- Check for proper cranking termination upon engine start.
- Clean lead acid battery terminals and apply corrosion inhibitor.
- Tighten battery cable connections as needed.
- Inspect and tighten starter motors, connections and wiring.
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 oil filter does the Kohler 20ROZJ81 use?
The Kohler 20ROZJ81 uses oil filter part number 223673.
Which fuel filter part number does the Kohler 20ROZJ81 take?
The Kohler 20ROZJ81 uses fuel filter part numbers 223414, 223953.
Parts
4model family| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 1000ROZD71-351890 | Generator - 1000ROZD71, Serial No. 351890, Main Compound | Generator | buy | |
| 12V149TI-12E0010387 | Power Unit - 12V149TI, Serial No. 12E0010387, Main Compound | Power unit | buy | |
| 6059T402728 | Power Unit - 4 cylinder, Serial No. 6059T402728, Correctional Camp | Power unit | Amazon eBay | |
| 80ROZJ81-338593 | Generator - 80ROZJ81, Serial No. 338593, Correctional Camp | Generator | Amazon eBay |
Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Available documents
Service manual — OT906706 RC (Ohio Department of Administrative Services (DAS), General Services Division, Office of State Purchasing)
This page was generated from the 1 manufacturer document above by automated extraction; every figure shown is copied from one of them. How the data is compiled.