Service parts for the E140
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredFuel system
1 requiredOil system
1 requiredBelts
1 requiredIgnition
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 | |
|---|---|---|---|---|---|
| Air filter | 00-031 | Amazon eBay | |||
| Fuel filter | 00-028 | Amazon eBay | |||
| Oil filter | 00-026 | Amazon eBay | |||
| Belt | Belt traction drive | GX20006 | Amazon eBay FridayParts $14.60 | ||
| Spark plug | 00-027 | Amazon eBay $195.89 |
Procedures
12Carburetor - Adjust adjustment
- Adjust throttle stop
- Adjust main jet
- Adjust idle jet
- Note: 1995 C.A.R.B. engines have tamper proof carburetor
- Test run unit
Governor, Mechanical - Adjust adjustment
- Adjust governor lever, idle speed, choke, speed control cable
- Test run engine
Valves - Adjust, All adjustment
- Remove and install rocker cover
- Adjust valve lash
- Test run unit
Air Cleaner Element - Replace maintenance
- Remove and install outer air cleaner cover, inner air cleaner cover
- Remove and install air element, air element wrapper
- Install new element
- Clean and visually inspect wrapper
- Apply fresh oil to wrapper
- Test run unit
Air Cleaner Element - Service maintenance
- Remove and install outer air cleaner cover, inner air cleaner cover, air filter wrapper
- Clean and visually inspect wrapper and paper element
- Apply fresh oil to wrapper
- Test run unit
Breather Valve - Service maintenance
- Remove and install rocker cover
- Clean and visually inspect breather valve
Lubricating Oil And Filter - Change maintenance
- Drain and fill oil base
- Remove and install filter
- Fill filter and engine with oil
- Check for oil leaks
- Test run unit
Oil By-Pass - Inspect and Reuse (Horizontal) maintenance
- Disconnect and connect electrical wiring
- Remove and install oil by-pass bolt, washer, by-pass spring, by-pass ball bearing
- Clean and visually inspect bore, ball, spring
- Test run unit
Oil By-Pass - Inspect and Reuse (Vert) maintenance
- Disconnect and connect choke cable, governor linkage, electrical wiring
- Remove and install oil base cover and o-ring, retaining spring, by-pass spring, by-pass ball bearing
- Clean and visually inspect
- Test run unit
Oil Filter, Full Flow - Replace maintenance
- Remove and install oil filter, rubber filter gasket
- Fill oil pan
- Check for oil leaks
- Test run unit
Spark Plug - Remove and Install maintenance
- Disconnect and connect spark plug wire
- Test run unit
Administrative Time - Open/Close Repair Order (In Shop) operation
- Clock on and off the job
- Move equipment to and from work area
- Clean work area and write repair order at the end of each shift
- Record engine model number
- Record engine serial number
- Record customer name and address
- Record original date of purchase
- Record hours of operation
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
Which oil filter part number does the Onan Corporation (Cummins Power Generation) E140 take?
The Onan Corporation (Cummins Power Generation) E140 uses oil filter part number 00-026.
Which fuel filter part number does the Onan Corporation (Cummins Power Generation) E140 take?
The Onan Corporation (Cummins Power Generation) E140 uses fuel filter part number 00-028.
Which air filter part number does the Onan Corporation (Cummins Power Generation) E140 take?
The Onan Corporation (Cummins Power Generation) E140 uses air filter part number 00-031.
Troubleshooting
5Symptoms & remedies
| Symptom | Remedy |
|---|---|
| Engine Overspeeds | - Check Governor adjustment - Check Throttle cable |
| Engine Power Output Low | - Check Governor - Check Throttle cable - Check Carburetor choke - Check Fuel filter - Check Air cleaner element - Check Fuel pump - Check Carburetor - Perform checks in Step 01 - Perform engine leak down test |
| Engine Runs Rough or Misfires | - Check Spark plugs - Check Fuel supply - Perform checks in Step 01 - Check Fuel filter - Check Fuel pump - Check Carburetor choke - Check Carburetor - Check Spark plug wires - Check Ignition coil - Check Engine electrical ground |
| Engine Surges | - Check Fuel supply - Check Fuel filter - Check Fuel pump - Check Plugged idle jet - Perform checks in Step 01 |
| Lubricating Oil Consumption Excessive | - Check: -01 - Oil consumption report - For external oil leaks - For overfilled oil pan - Oil specifications - For fuel contamination - Oil change interval - For engine oil in torque converter - Perform checks in Step 01 (0.4 hours) - Check: - Oil temperature - Air compressor oil consumption - Turbocharger seal - Crankcase blowby - Perform checks in Step 02 if problem not located in Step 01 (additional 0.6 hours, total 1.0 hours) |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Parts
40| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 00-021 | Troubleshoot − Engine Cranks But Will Not Start | 1 | Engine | Amazon eBay FridayParts $39.70 |
| 00-024 | Troubleshoot − Engine Difficult To Start | 1 | Engine | Amazon eBay |
| 00-026 | Intake manifold gaskets | Gasket | Amazon eBay | |
| 00-027 | Fuel pump | Pump | Amazon eBay $195.89 | |
| 00-037 | Troubleshoot − Engine Starts But Will Not Keep Running | 1 | Engine | Amazon eBay |
| 00-101 | Engine - Remove and Install (Gas Engine) | 1 | Engine | Amazon Amazon eBay eBay |
| 00-203 | Engine − Rebuild (Gas Engine) | 1 | Engine | Amazon Amazon eBay eBay |
| 01-112 | Crankshaft - Remove and Install | 1 | Crank | Amazon eBay |
| 01-121 | Gear Cover - Remove and Install | 1 | Cover | Amazon eBay |
| 01-1AB | Governor, mechanical | Mechanical | Amazon eBay | |
| 01-304 | Crankshaft Seal,Front − Replace | 1 | Seal | Amazon eBay |
| 01-308 | Crankshaft Seal, Rear - Replace (Horizontal) | 1 | Seal | Amazon eBay |
| 01-311 | Crankshaft seal, front | Seal | Amazon eBay | |
| 01-3AB | Gear Cover Gasket - Replace | 1 | Gasket | Amazon eBay |
| 01-541 | Cylinder Block - Hone or Bore | Block | Amazon eBay | |
| 02-104 | Cylinder Head - Remove and Install | - | Head | Amazon Amazon eBay eBay |
| 02-302 | Valve guides | Guide | Amazon Amazon eBay eBay | |
| 02-3AA | Cylinder Head Gasket - Replace | - | Gasket | Amazon eBay |
| 02-513 | Valves - Grind | Valve | Amazon eBay | |
| AM116304 | Fuel filter in-line | 5 | Fuel filter | Amazon eBay $8.72 FridayParts $9.80 |
| AM125424 | Engine oil filter | 5 | Oil filter | Amazon eBay $7.90 FridayParts $9.50 |
| GX20006 | Belt traction drive | 1 | Belt | Amazon eBay FridayParts $14.60 |
| GX21833 | Belt mower | 1 | Belt | Amazon eBay FridayParts $28.99 |
| MIU14395 | Air filter | 5 | Air filter | Amazon eBay $10.00 |
| TY22029 | Engine oil Turf-Gard 10W30 | 10 | Fluid | Amazon eBay $36.64 |
| TY24416 | John Deere multi-purpose HD lithium complex grease | 2 | Fluid | Amazon eBay |
| UC19085 | Spark plug | 10 | Spark plug | Amazon eBay |
| 00-028 | Carburetor | Service part / kit | Amazon eBay | |
| 00-031 | Ignition coil | Service part / kit | Amazon eBay | |
| 00-040 | Engine mounting | Service part / kit | Amazon eBay | |
| 00-044 | Troubleshoot − Engine Will Not Crank Or Cranks Slowly | 1 | Service part / kit | Amazon eBay |
| 00-045 | Exhaust system | 1 | Service part / kit | Amazon eBay |
| 00-901 | Administrative Time - Open/Close Repair Order (Shop) | 1 | Service part / kit | Amazon eBay |
| 01-140 | Piston and connecting rod assembly | 1 | Service part / kit | Amazon eBay |
| 01-1AA | Connecting Rod - Remove and Install | 1 | Service part / kit | Amazon eBay |
| 01-3AC | Piston Rings - Replace | 1 | Service part / kit | Amazon eBay |
| 01-3AD | Governor linkage | Service part / kit | Amazon eBay | |
| 01-3AE | Camshaft | 1 | Service part / kit | Amazon eBay |
| TY25221 | BATTERY (DRY) | 1 | Service part / kit | Amazon eBay $79.00 |
| TY26518 | Grease gun | 1 | Service part / kit | 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
Service manual — 900-0602C Onan Elite E124-E140 Repair Times (Onan Corporation (Cummins Power Generation))