Specifications
| Fuel | Diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 33 kW |
| Standby kVA | 41 |
| Oil capacity | 5.7 L |
| Alternator | YHB (2-pole) |
| Voltage options | 3000 V, 50 V, 3600 V, 60 V |
| Phase | 3 |
| Power factor | 0.8 |
| Battery group | 31 |
| Battery cranking | 530 CCA |
| Battery voltage | 12 V |
| Battery quantity | 1 |
| Coolant capacity | 11.5 L |
Engine
| Oil capacity | 5.7 L |
|---|---|
| Coolant capacity | 11.5 L |
| Aspiration | naturally aspirated |
| Rated speed | 3600 rpm |
Maintenance & consumables
for the Cummins/Onan L423D| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | clean/replace based on air restriction gauge (DL4B/DL6B) or visual inspection (DL6TB) | — | 400 hr | ||
| Fuel filter | — | 400 hr | |||
| Oil filter | — | 200 hr | |||
| Battery | 12 volt, Group 31; check specific gravity 1.260 fully charged | — | 50 hr | ||
| Belt | tension 60 lbs (267 N) | — | 50 hr | ||
| Coolant | 50/50 ethylene glycol antifreeze and clean, low-mineral water | — | |||
| Oil | SAE 15W-40/30W/20/20W-20/10W (API CD/SF, CD/SE, or MIL-L-2104C); or synthetic 5W-20/5W-30 (MIL-L-46167, MIL-L-2104C, or MIL-L-46152B) | — | 200 hr |
Service intervals
16| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Coolant Level | Check | 50 hr | ||
| Crankcase Oil and Filter | Change | 200 hr | First service — Perform after first 50 hours on new sets | |
| Fan Belt | Check | 50 hr | ||
| Generator Set | Inspect | 50 hr | With engine running, visually/audibly check exhaust for leaks | |
| Oil Level | Check | 50 hr | ||
| Valve Lash Clearance | Check | 400 hr | First service — Perform after first 50 hours on new sets; refer to L-Series Engine Service Manual | |
| Air Cleaner | Check | 100 hr | Perform more often under extremely dusty/dirty conditions | |
| Exhaust Condensate Trap | Drain | 100 hr | ||
| Fuel Level | Check | 100 hr | ||
| Battery Condition | Check | 200 hr | ||
| Electrolyte Level | Check | 200 hr | ||
| Generator Assembly | Clean | 200 hr | ||
| Air Cleaner Element | Change | 400 hr | ||
| Crankcase Breather Cap (DL6TB) | Clean | 400 hr | ||
| Fuel Filter | Change | 400 hr | 12 mo | Whichever comes first |
| Generator Bearing | Inspect | 500 hr | Replace every five years |
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
60| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Gap | Overspeed switch magnetic air gap | 0.005 | inch (0.13 mm) | must not be less than |
| Gap | Overspeed switch magnetic air gap | 0.005 inch (0.13 mm) minimum | inch | |
| Other | Battery electrolyte specific gravity | 1.260 | specific gravity | fully charged battery at 80F (27C) |
| Other | Battery electrolyte specific gravity (fully charged) | about 1.260 | specific gravity | at 80 deg F (27 deg C) |
| Other | Control breaker rating | 7 | amperes | |
| Other | Field breaker rating | 5 | amperes | |
| Other | Low Oil Pressure Delay before shutdown/pre-alarm | 7.5 to 12.5 | seconds | after Start-Disconnect Relay energized |
| Other | Low oil pressure delay circuit | 7.5 to 12.5 | seconds | after start-disconnect relay energized |
| Other | Maximum allowable exhaust back pressure | 41 | inches (1041 mm) H2O | |
| Other | Oil pressure gauge range | 0 to 100 psi (0 to 700 kPa) | psi | |
| Other | Overcranking timer cranking limit | 45 to 75 | seconds | |
| Other | Overcranking timer limit | 45 to 75 | seconds | |
| Other | Remote breaker rating | 7 | amperes | |
| Other | Switching regulator (standard setting) nominal switching frequency | approximately 125 | Hz | |
| Other | Water temperature gauge range | 100 to 250F (40 to 121C) | F | |
| Pressure | Air cleaner cleaning air pressure | 35 | psi (241 kPa) | |
| Pressure | Air cleaner rinse water pressure maximum | 40 | psi (276 kPa) | |
| Pressure | Low oil pressure shutdown (LO OIL PRES) | 14 | psi (97 kPa) | |
| Pressure | Low oil pressure switch closes | 14 | psi (97 kPa) | |
| Pressure | Low oil pressure switch closes | 14 psi (97 kPa) | psi | |
| Pressure | Oil pressure gauge normal range | 30 to 55 | psi (207 to 380 kPa) | operating temperature |
| Pressure | Oil pressure gauge range | 0 to 100 | psi (0 to 700 kPa) | |
| Pressure | Pre-low oil pressure switch closes | 20 | psi (138 kPa) | |
| Pressure | Pre-low oil pressure switch closes | 20 psi (138 kPa) | psi | |
| Pressure | Pre-low oil pressure warning | 20 | psi (138 kPa) | |
| Resistance | Commutating reactor L21 coils 1-2 | 0.031 to 0.37 | ohms | at 77 deg F (25 deg C) |
| Resistance | Commutating reactor L21 coils 3-4 | 0.037 to 0.46 | ohms | at 77 deg F (25 deg C) |
| Resistance | Commutating reactor L21/L22 coil 1-2 resistance | .031 to 0.37 | ohms | at 77F (25C) |
| Resistance | Commutating reactor L21/L22 coil 3-4 resistance | 0.037 to 0.46 | ohms | at 77F (25C) |
| Resistance | Commutating reactor coil to frame | infinity | ohms | |
| Resistance | Exciter rotor leads T1-T2, T2-T3, T1-T3 resistance | 0.6 to 0.7 | ohms | at 68F (20C) |
| Resistance | Exciter rotor winding between lead pairs T1-T2, T2-T3, T1-T3 | 0.6 to 0.7 | ohms | at 68 deg F (20 deg C) |
| Resistance | Exciter stator / rotor / generator winding insulation to ground | 1 megohm (1,000,000 ohms) or greater | ohms | minimum |
| Resistance | Exciter stator field leads F1-F2 resistance | 13.05 to 15.95 | ohms | at 77F (25C) |
| Resistance | Exciter stator winding between F1+ and F2- | 13.05 to 15.95 | ohms | at 77 deg F (25 deg C) |
| Resistance | Generator rotor field leads F1-F2 resistance (60 Hz) | 2.9 | ohms | at 77F (25C) |
| Resistance | Generator rotor field leads F1-F2 resistance (60 Hz) | 3.1 | ohms | at 77F (25C) |
| Resistance | Reference transformer T21 primary coil resistance | 333-407 | ohms | |
| Resistance | Reference transformer T21 primary coil resistance | 350-427 | ohms | |
| Resistance | Reference transformer T21 primary coil resistance | 531-649 | ohms | |
| Resistance | Stator resistance Code 15R (60 Hz) | 33.5 | milliohms | Test between T1-LO, T2-LO, T3-LO at 77F (25C) |
| Resistance | Stator resistance Code 15R (60 Hz) | 39.4 | milliohms | Test between T1-LO, T2-LO, T3-LO at 77F (25C) |
| Resistance | Stator resistance Code 15R (60 Hz) | 9.8 | milliohms | Test between T1-LO, T2-LO, T3-LO at 77F (25C) |
| Resistance | Stator resistance Code 515R (50 Hz) | 46.5 | milliohms | at 77F (25C) |
| Resistance | Voltage reference transformer T21 primary winding (H leads) | 350-427 / 333-407 / 303-371 / 282-344 / 531-649 | ohms | |
| Speed | Engine rated speed (per flow charts) | 1800 | rpm | |
| Speed | Frequency-to-speed conversion | 1 | hertz = 30 r/min | |
| Speed | Nominal switching frequency (switching regulator) | 125 | Hz | approximately |
| Speed | Overspeed switch contact closure | 2200 to 2250 | rpm | |
| Speed | Overspeed switch contacts close | 3950 to 4050 | rpm | |
| Temperature | High engine temperature shutdown | 220 | F (104 C) | |
| Temperature | High engine temperature switch closes | 222 | deg F (106 deg C) | |
| Temperature | High engine temperature switch closes | 222F (106C) | F | |
| Temperature | Low engine temperature switch closes | 70F (21C) | F | coolant drops below |
| Temperature | Low engine temperature switch closes below | 70 | deg F (21 deg C) | |
| Temperature | Low engine temperature warning (LO ENG TEMP) | 70 | F (21 C) | engine block temperature |
| Temperature | Oil temperature gauge range | 150 to 300 | deg F (66 to 149 deg C) | |
| Temperature | Pre-high engine temperature switch closes | 216 | deg F (102 deg C) | nominal |
| Temperature | Pre-high engine temperature switch closes | 216F (102C) | F | nominal |
| Temperature | Pre-high engine temperature warning | 215 | F (102 C) |
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 | Ethylene glycol anti-freeze (permanent type) with rust/corrosion inhibitor, no stop-leak additive | Use at least 50/50 mixture of anti-freeze and clean, soft water | |||
| Engine oil | 15W-40, 30W, 20, 20W-20, 10W (API CD/SF, CD/SE, or MIL-L-2104C); synthetic 5W-20 or 5W-30 (MIL-L-46167, MIL-L-2104C, MIL-L-46152B) | API CD/SF, CD/SE, MIL-L-2104C | Mineral base 5W-20/5W-30 not recommended under any conditions; select grade for lowest expected temperature | ||
| Fuel | ASTM 2-D (No. 2 Diesel) or ASTM 1-D (No. 1 Diesel), Cetane 45 minimum | ASTM 2-D / ASTM 1-D | Use No. 1 diesel below 0C (32F) and during long light-load periods; cloud point at least 10 degrees below lowest expected fuel temperature | ||
| Grease | MolyKote grease or equivalent | Apply thin film to mating surfaces of end bearing and end bell bearing hole | |||
| Grease | Molykote grease or equivalent | Apply a thin film to the mating surfaces of the end bearing and the end bell bearing hole. | |||
| Other | Approved water for battery electrolyte | Add approved water to keep battery electrolyte at proper level. |
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
8| Code | Name | Meaning | Severity | Action |
|---|---|---|---|---|
| HI ENG TEMP | High Engine Temperature | Engine overheated above 220F (104C) or low coolant | Shutdown | Check coolant level, airflow, fan belt |
| LO ENG TEMP | Low Engine Temperature | Engine block temperature below 70F (21C) | Info | Wait for block temperature to rise |
| LO OIL PRES | Low Oil Pressure | Oil pressure dropped to 14 psi (97 kPa) | Shutdown | Check oil level, reset control |
| OVERCRANK | Overcrank | Engine failed to start after 45-75 seconds cranking | Shutdown | Check fuel system |
| OVERSPEED | Overspeed | Engine exceeded normal operating speed | Shutdown | Contact Onan Dealer or Distributor |
| PRE HI ENG TEMP | Pre-High Engine Temperature | Engine temperature approximately 215F (102C) | Warning | Check ventilation, reduce load |
| PRE LO OIL PRES | Pre-Low Oil Pressure | Oil pressure dropped to 20 psi (138 kPa) | Warning | Check oil level |
| SWITCH OFF | Switch Off | Start/Stop/Remote switch in Stop position | Info | Move switch to Remote for automatic starting |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
12Changing Sensitivity Reference adjustment
⚠ Do not mark on printed circuit boards with a pencil; graphite lines are conductive.
Tools: soldering iron
- Unsolder W1 on VR21 at hole F for frequency sensitive.
- Resolder W1 to hole S for semi-frequency sensitive.
- Resolder W1 to hole N for non-frequency sensitive.
Fan Belt Adjustment adjustment
Tools: belt adjustment tool
- Loosen alternator bolt through elongated slot in mounting bracket
- Slide alternator until fan belt tension of 60 lbs (267 N) is obtained
- Tighten alternator mounting bolt to lock in place
- Check tension and repeat if necessary
Governor Control Adjustment adjustment
⚠ Hold the throttle linkage so that the set will not overspeed.
Tools: frequency meter
- Place Start/Stop/Remote switch in STOP.
- Attach frequency meter to generator output leads if none on panel.
- Locate governor control in control box.
- Adjust GAIN potentiometer fully counterclockwise.
- Hold throttle linkage to prevent overspeed; start the set.
- Adjust SPEED potentiometer to correct frequency (50 or 60 hertz).
- Adjust GAIN clockwise until governor hunts, then counterclockwise until stable.
- Test by tapping actuator lever; set should return to speed without hunting.
- Stop and restart set to verify it does not overspeed.
Magnetic Pickup Sensor Adjustment adjustment
- Place Start/Stop/Remote switch in the STOP position.
- Loosen stop-nut on the magnetic sensor on the flywheel housing.
- Turn sensor IN until it just contacts flywheel ring gear.
- Back sensor OUT 1/2 turn and tighten stop-nut.
Reconnection (Test Q) adjustment
- Refer to the generator reconnection possibilities when changing voltage.
- Reconnect lead W12 (inside control box) to the proper H terminal (H2, H3, H4, H5, or H6) depending on voltage selected.
- Change jumper W12 from TB2-2 to the proper TB2 terminal.
Voltage Adjustment (Standard Regulator) adjustment
- Center the panel mounted voltage adjustment knob with pointer vertical.
- Start the set and allow it to stabilize at correct frequency and speed.
- Turn R18 counterclockwise to decrease voltage or clockwise to increase.
- Set voltage with no load connected (e.g., 246 volts for 120/240).
- Turn R26 counterclockwise until unstable, then clockwise until voltage stabilizes.
Voltage Adjustment (Test P) adjustment
Tools: voltmeter
- Center the panel-mounted voltage adjustment knob vertically.
- Start the set and allow it to stabilize at the correct frequency and speed.
- Standard regulator: turn R18 counterclockwise to decrease voltage, clockwise to increase; set no-load voltage (e.g. 246 volts for 120/240 connection).
- Standard regulator: turn R26 counterclockwise until voltage hunts, then clockwise until stable.
- Switching regulator: turn R36 counterclockwise to increase voltage, clockwise to decrease; set no-load voltage.
- Switching regulator: turn R5 counterclockwise until voltage hunts, then clockwise until stable.
Alternator Checkout diagnostic
Tools: voltmeter
- With engine running, check battery charge rate DC ammeter.
- Ammeter should show slight charge tapering to zero as battery becomes charged.
- If constant discharge or high charge, stop set and check drive belt, terminals, leads.
- Measure alternator output voltage: positive lead to output terminal, negative to ground.
- Nominal output voltage should be 13.8 to 14.8 volts.
- If over 15 volts, check voltage regulator leads; replace regulator if shorted.
Alternator Checkout (C) diagnostic
Tools: DC ammeter, voltmeter
- With engine running, check the battery charge rate DC ammeter; it should show a slight charge tapering to zero.
- If constant discharge or constant high charge, stop set and check drive belt, terminal connections, and lead wires.
- Use a voltmeter between output terminal and ground; nominal output should be 13.8 to 14.8 volts.
- If output high (over 15 volts), check for loose or corroded voltage regulator leads; replace regulator if shorted.
- If output low, problem could be worn/broken brushes, open regulator, or open field diode.
Battery Cable Checkout (B) diagnostic
Tools: voltmeter
- With the starter motor operating, check voltage drop from battery negative post to cylinder block.
- Check voltage drop from battery positive post to battery terminal stud on the solenoid.
- Normally each should be less than 0.3 volt.
- Clean all connections in any part of the circuit showing excessive voltage drop.
Fuel Solenoid Checkout diagnostic
- Listen for a click in the injection pump when start switch is placed in run position.
- If no click is heard and there is power to solenoid, replace the fuel solenoid.
Fuel Solenoid Checkout (F) diagnostic
- To check energized-to-run operation, listen for a click in injection pump when start switch is placed in run position.
- If no click and there is power to solenoid, the fuel solenoid must be replaced.
- To check energized-to-stop operation, listen for a click when switch is placed in stop position.
- If no click and there is no power to solenoid, the fuel solenoid must be replaced.
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 |
|---|---|---|---|---|
| Connect loose wire W12 from TB2-2 to TB2 (H terminal) | H2, H3, H4, H5 or H6 depending on voltage selected | W12 reconnection lead inside control box; must be reconnected to proper H terminal when reconnecting for a different voltage | ||
| X1 (red) to VR21-9, X2 (red) to VR21-10 | X1, X2 | Reference transformer T21 secondary connections | ||
| 110/190 | 3 | Figure 26 generator voltage connections | ||
| 110/220 | 1 | Connect lead W12 to H6 (per Figure 26 reconnection table) | 50 Hz. Figure 26 generator voltage connections. OCR partially garbled. | |
| 115/200 | 3 | Figure 26 generator voltage connections | ||
| 115/230 | 1 | Connect lead W12 to H6 (per Figure 26 reconnection table) | 50 Hz. Figure 26 generator voltage connections. OCR partially garbled. | |
| 120/208 | 3 | Figure 26 generator voltage connections | ||
| 120/240 | 1 | Connect lead W12 to H5 (per Figure 26 reconnection table) | 60 Hz. Figure 26 generator voltage connections. OCR partially garbled. | |
| 120/240 | 1 | Reconnectible generator (code 15/515) | W12 (TB2) to H3/H4/H5/H6 on voltage reference transformer | 12-lead generator reconnection |
| 127/220 | 3 | Figure 26 generator voltage connections | ||
| 130/400 | 3 | Figure 26 generator voltage connections | ||
| 139/240 | 3 | Figure 26 generator voltage connections | ||
| 220/380 | 3 | Figure 26 generator voltage connections | ||
| 220/380 | 3 | Non-reconnectible (code 7) | H3 | |
| 240/416 | 3 | Figure 26 generator voltage connections | ||
| 254/440 | 3 | Figure 26 generator voltage connections | ||
| 277/480 | 3 | Figure 26 generator voltage connections | ||
| 347/600 | 3 | Non-reconnectible (code 9X) | H5 | |
| Various | Reconnect lead W12 (inside control box) from TB2-2 to the proper H terminal (H2, H3, H4, H5, or H6) depending on voltage selected | W12, H2, H3, H4, H5, H6 | Figure 25. Single phase generators use leads 1 and 4 (lead 2 not used); three phase generators use leads 4, 7, 8, 9 and 10 for control input and metering. |
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 Cummins/Onan DL4?
The Cummins/Onan DL4 is rated 33 kW standby (41.2 kVA).
Which engine powers the Cummins/Onan DL4?
The Cummins/Onan DL4 is powered by the Cummins/Onan L423D engine.
What kind of fuel does the Cummins/Onan DL4 run on?
The Cummins/Onan DL4 runs on Diesel.
How much oil does the Cummins/Onan DL4 take?
The Cummins/Onan L423D engine in the Cummins/Onan DL4 has an oil capacity of 5.7 liters.
How much coolant does the Cummins/Onan DL4 hold?
The Cummins/Onan DL4 cooling system holds 11.5 liters (3.0 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
What voltages is the Cummins/Onan DL4 available in?
The Cummins/Onan DL4 is offered in 3000 V, 50 V, 3600 V, 60 V, 3-phase.
What battery does the Cummins/Onan DL4 use?
The Cummins/Onan DL4 uses 1 battery, 12 V each, 530 CCA, group 31, per the manufacturer specification sheet.
What alternator comes on the Cummins/Onan DL4?
The Cummins/Onan DL4 uses a YHB alternator. It has 2 poles.
Troubleshooting
7Symptoms & remedies
| Symptom | Remedy |
|---|---|
| Dizziness | Get out into fresh air immediately, shut down the unit and do not use until it has been inspected. |
| Vomiting | Get out into fresh air immediately, shut down the unit and do not use until it has been inspected. |
| Muscular Twitching | Get out into fresh air immediately, shut down the unit and do not use until it has been inspected. |
| Weakness and Sleepiness | Get out into fresh air immediately, shut down the unit and do not use until it has been inspected. |
| NO AC OUTPUT VOLTAGE AT RATED ENGINE RPM | Test voltage regulator assembly per procedure (S). Replace the regulator PC board per procedure (F) if defective. If control panel field breaker CB3 is OFF, replace the defective field breaker. Push to reset breaker and check if AC output voltage builds up. Check residual voltage across TB2-2 and H1 for 5 to 10 VAC or more. Flash exciter field per TEST [D] and check if generator output voltage builds up. Disconnect stator leads 7 (4) and 8 (1) from TB2-2 and H1, then check residual voltage across these leads for 5 to 10 VAC or more. Check reactor L21 and transformer T21 per TEST [B] and [E]. Ensure exciter field voltage across TB1-5 & 6 is 5 VDC or more. Test diodes and SCR’s on bridge assembly CR21, check exciter field wiring harness per TEST [M], and verify fuses F2 and F3 for continuity on VR21 regulator PC board. Check exciter field winding per TEST [H] and replace if bad. |
| Green RUN lamp lights following engine start-up. | Indicates all engine systems are normal. No corrective action required. |
| PRE HI ENG TEMP lamp lights. Engine continues to operate. | Indicates engine has begun to overheat and engine temperature has risen to approximately 215°F (102°C). If engine can be stopped, follow procedures in step 3. Use the following procedures if generator is powering critical loads and cannot be shutdown. a. Check air inlets and outlets and remove any obstructions to airflow. b. Open doors or windows in generator area to increase ventilation. c. Reduce load if possible by turning off non-essential equipment. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Repair guides
27- Alternator Checkout
- Alternator Checkout (C)
- Battery Cable Checkout (B)
- Battery Checkout (A)
- Changing Sensitivity Reference
- Cleaning Crankcase Breather (Turbocharged Engines)
- Flashing the Field (Test D)
- Fuel Solenoid Checkout (F)
- Generator Assembly
- Generator Reassembly
- Governor Control Adjustment
- Magnetic Pickup Sensor Adjustment
- Priming the Fuel System - High Pressure
- Priming the Fuel System - Low Pressure
- Reconnection (Test Q)
- Relay Checkout (E)
- Solenoid Checkout (D)
- Switch Checkout
- Switch Checkout (G)
- Testing Commutating Reactors (L21 and L22)
Step-by-step procedures compiled from the Cummins/Onan service manual for this model.
Parts
37| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 140-1791 | Indicator Service | 1 | Sensor | Amazon eBay |
| 151-0437 | Kit, Throttle Modification (Fuel Injection Pump) | 1 | Fuel pump | Amazon eBay |
| 193-0244 | Sender, Pressure - 0i1 | 1 | Sensor | Amazon eBay |
| 305-0693 | Regulator assembly - voltage (standard voltage regulator assembly) | 1 | Avr | Amazon eBay |
| 332-2044 | PC BOARD ASSEMBLY | 1 | Avr | Amazon eBay |
| 503-0354 | Clamp, Hose | 4 | Hose | Amazon eBay |
| 503-0465 | Clamp, Hose | 2 | Hose | Amazon eBay $23.99 |
| 503-0482 | Hose, Rubber | 1 | Hose | Amazon eBay |
| 140-0078 | Band, Mount ing | 2 | Service part / kit | Amazon eBay NAPA $33.55 |
| 140-1844 | DGAB. DL4, A41 | 1 | Service part / kit | Amazon eBay |
| 140-1845 | DGAC. DGAD. DL6. A61 | 11 | Service part / kit | Amazon eBay |
| 140-1851 | Element | 1 | Service part / kit | Amazon eBay NAPA $51.90 |
| 140-1864 | Elbow, Rubber | 1 | Service part / kit | Amazon eBay NAPA $28.15 |
| 140-1871 | Tube, Air Inlet | 1 | Service part / kit | Amazon eBay |
| 150-0939 | Joint, Ball | 2 | Service part / kit | Amazon eBay |
| 150-1996 | Bracket, Mounting | 1 | Service part / kit | Amazon eBay |
| 151-0565 | Control Unit, Governor -12 VDC (A12) | 1 | Service part / kit | Amazon eBay |
| 151-0566 | Actuator, Governor | 1 | Service part / kit | Amazon eBay |
| 151-0567 | Arm, Governor (Includes Screw and Nut) | 1 | Service part / kit | Amazon eBay |
| 191-0943 | Fan. Atlernator | 1 | Service part / kit | Amazon eBay |
| 191-1452 | Used on early Spec C Models with isolation Diode Assembly | 1 | Service part / kit | Amazon eBay |
| 191-1453 | Spec C Used on Early Spec C Model with Isolation Diode Assembly | 1 | Service part / kit | Amazon eBay |
| 191-1454 | Diode Assembly. Isolation- Used on Early Spec C Models Diode, Rectifier - Negative | 1 | Service part / kit | Amazon eBay |
| 191-1525 | Alternator (Complete) Used Beginning on Late Spec C Models- Has No Isolation Diodes on Back Side of Alternator (Replaces Early Spec C Models with Isolation Diode Assembly on Back Side of Alternator) | 1 | Service part / kit | Amazon eBay |
| 191-1559 | Used on Late Spec C Models without Isolation | 1 | Service part / kit | Amazon eBay |
| 191-1560 | Used on Late Spec C Modeis without Isolation Diode Assembly | 1 | Service part / kit | Amazon eBay |
| 300-2409 | Switching Regulator | 1 | Service part / kit | Amazon eBay |
| 305-0695-02 | External Adjust Harness, Wiring | 1 | Service part / kit | Amazon eBay |
| 309-0169 | 1 Begin Spec G 25 26 | 1 | Service part / kit | Amazon eBay |
| 503-1222 | Elbow, 90 Tube, Intake | 2 | Service part / kit | Amazon eBay |
| 505-0001 | Cap, Pipe (1/8") | 1 | Service part / kit | Amazon eBay NAPA $63.90 |
| 55432 | 73RD AVENUE NE * MINNEAPOLIS. MINNESOTA | 1400 | Service part / kit | Amazon eBay |
| 718-1067 | Screw. Hex Head | 1 | Service part / kit | Amazon eBay |
| 800-0006 | Screw, Cap - Hex Head (1/4-20 × 7/8") | 4 | Service part / kit | Amazon eBay |
| 850-0040 | Washer, Lock - Spring (1/4") | 2 | Service part / kit | Amazon eBay |
| 870-0131 | Nut. Hex - with ET (#10-32) | 1 | Service part / kit | Amazon eBay |
| 934-0121 | SPEC A | 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 — 934-0121 Onan DL4B DL6B DL6TB Operator's Manual (8-1964) (Onan)Parts manual — 934-0236 Onan DGAB DGAC DGAD (Spec F) DGAE (Spec C) DL4 DL6 (Spec C-F) DLT (Spec A-C) A41 A61 (Spec E) A61T (Spec B) (08-2011) (Cummins/Onan)Service manual — 900-0336 Onan DL4 DL6 DL6T Genset Generator & Controls Service manual (08-1983) (Onan)Service manual — 900-0339 Onan DL4B DL6B DL6TB YHB Generator Controls manual 11-1984 (Onan)
This page was generated from the 4 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.