Specifications
| Fuel | Number 2 diesel fuel |
|---|---|
| Frequency | 50.0 Hz |
| Standby power | 26 kW |
| Standby kVA | 33 |
| Prime power | 24 kW |
| Controller | PowerCommand 1301, PowerStart |
| Voltage options | 127/220 V, 120/208 V, 133/230 V, 138/240 V, 230/400 V, 240/416 V, 220/380 V, 255/440 V, 277/480 V, 265/460 V, 254/440 V |
| Phase | 3 |
| Power factor | 1.0 |
| Battery voltage | 12 volt, negative ground V |
| Max ambient | 50 °C |
| Dimensions (L×W×H) | 1753×930×1238 mm |
| Dry weight | 743 kg |
| Fuel tank | 170.0 L |
Filters & service parts
model family| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Dry replaceable element | — | |||
| Fuel filter | Single element, Spin-on fuel cum Water Separator, Filtration efficiency 25 micron 99% (min), Water separation efficiency 90% (min) | — | |||
| Oil filter | — | ||||
| Battery | — | ||||
| Belt | — | ||||
| Coolant | — | ||||
| Oil | — | ||||
| Spark plug | — |
Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number.
Service specifications
55| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Resistance | Coolant heater coil resistance | 10 to 60 | ohms | closed heater |
| Resistance | Injection pump actuator resistance | 2.3 | ohms | |
| Resistance | Main rotor resistance | 0.415 | Ohms | within 10% of value |
| Resistance | Main rotor resistance | 0.437 | Ohms | within 10% of value |
| Resistance | Main rotor resistance | 0.465 | Ohms | within 10% of value |
| Resistance | Main rotor resistance | 0.545 | Ohms | within 10% of value |
| Resistance | Main rotor resistance | 0.551 | Ohms | within 10% of value |
| Resistance | Main rotor resistance | 0.657 | Ohms | within 10% of value |
| Resistance | Main rotor resistance | 0.67 | Ohms | within 10% of value |
| Resistance | Main rotor resistance | 0.708 | Ohms | within 10% of value |
| Resistance | Main rotor resistance | 0.857 | Ohms | within 10% of value |
| Resistance | Main rotor resistance | 0.89 | Ohms | within 10% of value |
| Resistance | Main rotor resistance | 0.983 | Ohms | within 10% of value |
| Resistance | Main rotor resistance | 0.99 | Ohms | within 10% of value |
| Resistance | Main stator winding resistance | 0.3 | Ohms | |
| Resistance | Main stator winding resistance | 0.353 | Ohms | |
| Resistance | Main stator winding resistance | 0.51 | Ohms | |
| Resistance | Main stator winding resistance | 0.625 | Ohms | |
| Resistance | Main stator winding resistance | 0.95 | Ohms | |
| Resistance | Main stator winding resistance | 1.33 | Ohms | |
| Resistance | Main stator winding resistance | 1.908 | Ohms | |
| Resistance | Stator insulation resistance | 1.0 | Meg-Ohm | minimum to Earth (Ground) |
| Torque | AVR cover to NDE bracket | 5 | Nm | |
| Torque | AVR to NDE bracket | 5 | Nm | |
| Torque | Axial air inlet cover to NDE bracket | 5 | Nm | |
| Torque | Clamping spacer to rectifier hub | 2.8/3.6 | Nm | |
| Torque | Coupling disc to flywheel | 51 | Nm | |
| Torque | Coupling disc to shaft | 75 | Nm | |
| Torque | DE Adaptor to Flywheel housing | 51 | Nm | |
| Torque | DE Adaptor to frame blocks | 26 | Nm | |
| Torque | DE Air outlet cover | 6.5 | Nm | |
| Torque | Diode fitting | 2.8/3.6 | Nm | |
| Torque | Diode fitting torque | 36 to 42 | in-lbs (4 to 4.8 Nm) | |
| Torque | EBG Housing cover to housing | 6.5 | Nm | |
| Torque | EBG Rtr to shaft | 50 | Nm | |
| Torque | EBG Str Hsg to NDE bracket | 10 | Nm | |
| Torque | EBG Str to EBG Str Hsg | 10 | Nm | |
| Torque | Earth lead to NDE bracket | 6 | Nm | |
| Torque | Excitor stator to NDE bracket | 10 | Nm | |
| Torque | Fan to fan hub 290 and 344 | 5 | Nm | |
| Torque | Main rotor terminals | 24 | in-lbs (2.7 Nm) | |
| Torque | NDE bracket to Frame blocks | 26 | Nm | |
| Torque | Pigtail terminals | 24 | in-lbs (2.7 Nm) | |
| Torque | Radial Inlet cover to Nde bracket | 5 | Nm | |
| Torque | Rectifier hub to excitor rotor | 2.8/3.6 | Nm | |
| Torque | Rotor leads to Clamping spacer | 2.8/3.6 | Nm | |
| Torque | Small Terminal box to NDE bracket | 5 | Nm | |
| Torque | Stator Lead to terminal studs | 6.5 | Nm | |
| Torque | Surge suppresser terminals | 24 | in-lbs (2.7 Nm) | |
| Torque | Terminal block to NDE bracket | 5 | Nm | |
| Torque | Terminal box lid to terminal box | 5 | Nm | |
| Torque | Varistor to rectifier hub | 2.8/3.6 | Nm | |
| Voltage | MPU output while cranking | 3.5 to 15 | VAC | while cranking |
| Voltage | Oil pressure sender output | 0.5 | VDC | at 0 psi |
| Voltage | Oil pressure sender output | 4.5 | VDC | at 100 psi |
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 |
|---|---|---|---|---|---|
| Fuel | Number 2 diesel fuel | Direct injection |
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
59| Code | Name | Meaning | Severity | Action |
|---|---|---|---|---|
| 1 | HIGH COOLANT TEMP | Engine has overheated; coolant temperature has risen above shutdown trip point. | Shutdown | Allow engine to cool. Check coolant level, airflow obstructions, fan belt, blower and circulation pumps. Reset and restart. |
| 12 | HIGH AC VOLTAGE | One or more phase voltages exceeded 130% of nominal for 0 second, or exceeded high AC voltage threshold for time delay. | Shutdown | Check fault simulation, block load removal, threshold setting, Base board or generator, voltage sense connections. |
| 121 | Speed Signal Lost - Shutdown | Shutdown | ||
| 13 | LOW AC VOLTAGE | One or more phase voltages dropped below low AC voltage threshold for time delay. | Shutdown | Check fault simulation, threshold, overload, output connections, excitation inputs, rotating rectifier diodes, connector or Base board. |
| 1311 | CUST_FAULT #1 - Warning | Warning | ||
| 1312 | CUST_FAULT #2 - Warning | Warning | ||
| 1317 | CUST_FAULT #3 - Warning | Warning | ||
| 135/141 | Oil Pressure Sensor OOR - Warning | Warning | ||
| 14 | OVER FREQUENCY | Frequency is 10% above base frequency for approximately 10 seconds. | Shutdown | Check threshold, fuel or air delivery, governor, connector or Base board. |
| 143 | Pre-Low Oil Pressure - Warning | Warning | ||
| 1438 | Fail to Crank - Shutdown | Shutdown | ||
| 1442 | Weak Battery - Warning | Warning | ||
| 1446 | High AC Voltage - Shutdown | Shutdown | ||
| 1447 | Low AC Voltage - Shutdown | Shutdown | ||
| 1448 | Under Frequency - Shutdown | Shutdown | ||
| 1449 | Over Frequency - Shutdown | Shutdown | ||
| 145 | Coolant Sensor OOR - Warning | Warning | ||
| 146 | Pre-High Coolant Temp - Warning | Warning | ||
| 1471 | High AC Current - Warning | Warning | ||
| 1472 | High AC Current - Shutdown | Shutdown | ||
| 15 | UNDER FREQUENCY | Engine speed dropped below 90% of nominal for approximately 10 seconds. | Shutdown | Check fuel supply, intake air supply, load, threshold, governor, connector or Base board. |
| 151 | High Coolant Temp - Shutdown | Shutdown | ||
| 1944 | Annunciator Error - Warning | Warning | ||
| 2 | LOW OIL PRESSURE | Engine oil pressure has dropped below shutdown trip point. | Shutdown | Check oil level, lines and filters; replenish if low; reset and restart; check oil switch. |
| 202 | PRE-HIGH COOL TMP | Engine is operating near cooling system capacity. | Warning | Review code 1 correction list. |
| 203 | LOW COOLANT TEMP | Engine coolant temperature is 70F (21C) or lower. | Warning | Check coolant heater power, low coolant level, heater element; check current draw. |
| 204,205 | CONFIGURABLE INPUT #1,#2 | Optional configurable input warning. | Warning | Disconnect signal lead from TB1 and reset control; check CUST_IN1 TB1-14 and CUST_IN2 TB1-12. |
| 212 | COOL SENSOR OOR | Coolant temperature sensor output is out of range (high or low). | Warning | Check sender, connectors and wires. |
| 213 | LOW BATTERY | Battery voltage supply to control is approaching a low level. | Warning | Check battery charger fuse; recharge or replace battery; clean connections; check wiring/calibration, engine DC alternator, float level. |
| 214 | HIGH BATTERY | Battery voltage supply to control is approaching a high level. | Warning | Check float level on battery charger; check battery wiring/calibration. |
| 215 | PRE-LOW OIL PRESSURE | Engine oil pressure dropped below warning trip point. | Warning | Follow code 2 procedure. |
| 216 | HIGH AC CURRENT | One or more phase currents exceeded high AC warning threshold for time delay. | Warning | Check load and load lead connections. |
| 217 | OIL PRESS SENSOR OOR | Engine oil pressure sensor output is out of range (high or low). | Warning | Check sender, connectors and wires. |
| 218 | BATTLE SHORT ACTIVE | Control is in Battle Short mode; bypasses several fault shutdowns for emergency operation. | Warning | |
| 219 | CHARGER FAILURE | Battery charging alternator has not reached acceptable voltage range within selected period (default 120 seconds). | Warning | Refer to engine service manual if fault occurs; check wiring if not failed. |
| 220 | FAIL TO SHUTDOWN | Genset continues to run after shutdown command; Battle Short feature enabled. | Warning | |
| 221 | WEAK BATTERY | During cranking, battery voltage is at or below weak battery warning trip point for time >= weak battery set time. | Warning | See code 213 for corrective action. |
| 222,223,224 | ANNUNCIATOR FAULT 1,2,3 | Optional configurable annunciator fault. | Warning | |
| 225 | ANNUNCIATOR OUTPUT CONFIGURATION ERROR | Mismatch in configuration of one of the annunciator relay outputs. | Warning | Check network setup for duplicate use of same annunciator relay output; troubleshoot network devices. |
| 2335 | Excitation Fault - Shutdown | Shutdown | ||
| 234 | Overspeed - Shutdown | Shutdown | ||
| 2677 | Fail to Stop - Shutdown | Shutdown | ||
| 27 | EXCITATION FAULT | Loss of all three voltage sense leads or failure in excitation circuit. | Shutdown | Check field wiring (X1 and X2) for shorts or opens. |
| 31 | OVERSPEED | Engine exceeded normal operating speed; default thresholds 1725 RPM (50 Hz) or 2075 RPM (60 Hz). | Shutdown | Check cold engine, single step large block load removal, fault simulation, threshold, MPU, governor, flywheel teeth, fuel stop settings. |
| 359 | Fail to Start - Shutdown | Shutdown | ||
| 38 | FIELD OVERLOAD | Field AVR Duty Cycle has been at maximum for at least 15 seconds. | Shutdown | |
| 415 | Low Oil Pressure - Shutdown | Shutdown | ||
| 441 | Low Battery - Warning | Warning | ||
| 442 | High Battery - Warning | Warning | ||
| 45 | SPEED SIGNAL LOST | No magnetic pickup pulses are sensed for Loss of Speed delay; if no MPU, speed sensing is by AC line frequency and fault cannot occur. | Shutdown | Inspect MPU wires/connector pins; test MPU for 3.5 to 15 VAC while cranking; check P11-12 to P11-24; replace Base board if needed. |
| 46 | HIGH AC CURRENT | Individual phase alternator output current exceeded high current threshold continuously for more than time delay. | Shutdown | Check load and load lead connections. |
| 61 | EMERGENCY STOP | Remote Emergency Stop. | Shutdown | Open (disable) remote emergency stop button; move rocker switch to OFF or press OFF; select desired operating mode. |
| 71 | SPEED HZ MATCH | Measured speed and measured AC output frequency do not agree. | Shutdown | Check genset setup for number of flywheel teeth. |
| 72 | FAIL TO CRANK | Genset failed to sense rotation for two start attempts; possible control, speed sensing or starting system fault. | Shutdown | Check starter, K7 starter relay, Emergency Stop switch/wiring, MPU circuit or Base board. |
| 73 | FAIL TO START | Engine cranks but fails to start; possible fuel system or air induction problem. | Shutdown | Check fuel tank, leaks, plugged fuel lines, fuel filter, air filter; reset and restart; check glow plugs and governor linkage. |
| 74 | FAIL TO STOP | Genset continues to run after receiving shutdown command from controller. | Shutdown | |
| 75,76 | CONFIGURABLE INPUT #1 & #2 | Optional configurable input fault. | Shutdown | Disconnect signal lead from TB1 and reset control; check CUST_IN1 TB1-14 and CUST_IN2 TB1-12. |
| 77 | SHUTDOWN AFTER BS | A shutdown fault occurred while Battle Short mode was enabled. | Shutdown | Check fault history for faults that may have been bypassed. |
| 81,82,83 | ANNUNCIATOR FAULT 1,2,3 | Optional configurable annunciator fault. | Shutdown |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
12Valves - Adjust, All adjustment
- Disconnect battery cables
- Remove valve cover
- Adjust valve lash
- Test run unit
Generator/Base Board Isolation Procedure diagnostic
⚠ Hazardous voltage
⚠ Test involves unregulated excitation; disconnect loads
Tools: 12 volt battery, Jumper leads, Voltmeter
- Throw line circuit breaker OFF and shutdown set.
- Disconnect X and XX exciter stator leads from AC harness.
- Prepare to measure output voltage across generator terminals.
- Bring two jumpers from 12V battery to X (Field +) and XX (Field -).
- Check polarity; correct or test inconclusive.
- Start set and connect battery negative to XX.
- If rated output voltage or higher and balanced, generator OK; troubleshoot control.
- If unbalanced, troubleshoot main stator; if uniformly low, troubleshoot exciter and field.
Testing Diodes diagnostic
⚠ Layers of dust can cause diodes to overheat and fail.
Tools: Ohmmeter
- Disconnect diode pigtails from terminal posts.
- Measure resistance between each diode pigtail and its plate.
- Reverse meter probes and repeat.
- Replace diode if resistance high or low in both directions.
Testing Exciter Rotor diagnostic
Tools: Wheatstone bridge, Ohmmeter
- Disconnect six rotor winding leads from rectifier terminal posts.
- Measure resistance across each pair of rotor windings U-V, V-W, W-U.
- Replace whole rotor shaft assembly if any winding resistance not per Table 6-1.
- Measure insulation resistance between winding lead and rotor laminations.
- Replace rotor shaft assembly if insulation resistance less than 1 megohm.
Testing Exciter Stator diagnostic
Tools: Wheatstone bridge, Digital ohmmeter, Insulation resistance meter
- Measure winding resistance with Wheatstone bridge or digital ohmmeter.
- Replace stator if resistance not as specified in Table 6-1.
- Disconnect X and XX leads and isolate from ground.
- Measure resistance between either lead and stator laminations.
- Replace stator if insulation resistance less than 1 megohm.
Testing Main Rotor diagnostic
Tools: Wheatstone bridge, Digital ohmmeter, Torque wrench
- Disconnect two main rotor leads from rotating rectifier terminals.
- Measure resistance between two leads with Wheatstone bridge or digital ohmmeter.
- Replace rotor if resistance not as specified in Table 6-1.
- Measure resistance between either lead and main rotor laminations.
- Replace rotor if insulation resistance less than 1 megohm.
- Torque terminals to 24 in-lbs (2.7 Nm) when reassembling.
Testing Main Stator diagnostic
Tools: Wheatstone bridge, Insulation tester
- Measure resistance across each pair of stator leads U1-U2, U5-U6, V1-V2, V5-V6, W1-W2, W5-W6.
- Use Wheatstone bridge or ohmmeter with at least 0.001 ohm precision.
- Replace stator if any winding resistance not as specified in Table 6-1.
- Disconnect AVR completely before insulation test.
- Disconnect Neutral to Earth and any connections.
- Use 500 or 1000 V insulation tester for low voltage generators up to 690V.
- Minimum insulation value is 1.0 Meg-Ohm to Earth; dry windings if below.
Genset, Standby - Remove and Install installation
- Disconnect and connect battery cables
- Disconnect and connect output leads
- Disconnect and connect fuel lines
- Disconnect and connect exhaust system
- Remove and install genset
- Test run unit
Magnetic Speed Pickup Unit (MPU) Installation installation
⚠ Do not use fan blade to bar over engine.
Tools: MPU sensor, Lock nut
- Bar engine until a flywheel gear tooth lines up in center of mounting hole.
- Thread sensor in gently by hand until it just touches gear tooth.
- Back it out one quarter turn and set lock nut.
Air Cleaner Element - Replace maintenance
- Remove and install cover and gasket
- Remove and install filter element
- Test run unit
Circuit Board Removal/Replacement maintenance
⚠ Electrostatic discharge will damage circuit boards.
Tools: Grounding wrist strap, InPower Service Tool, PCC1301 Interface Kit
- Turn off AC power to battery charger.
- Remove negative battery cable from starting battery.
- Wear grounding wrist strap; attach clip to chassis ground.
- Create capture file of genset parameters using InPower before replacing Base board.
- Remove circuit board connectors and board.
- After replacement, write previous settings to new Base board using capture file.
Fuel Filter, Spin-on Type - Replace maintenance
- Remove and install fuel filter
- Prime fuel system
- Test run unit
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 |
|---|---|---|---|---|
| above 300 volts L-L | X1 & X2 | CT secondaries | CTs have dual secondaries (3 pins marked X1, X2 & X3). | |
| below 300 volts L-L | X1 & X3 | CT secondaries | CTs have dual secondaries (3 pins marked X1, X2 & X3). |
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 is the power rating of the Cummins/Onan C33 D5?
The Cummins/Onan C33 D5 is rated 26 kW standby (33.0 kVA).
What engine is in the Cummins/Onan C33 D5?
The Cummins/Onan C33 D5 is powered by the Cummins/Onan C33 D5 engine.
What fuel does the Cummins/Onan C33 D5 use?
The Cummins/Onan C33 D5 runs on Number 2 diesel fuel.
Troubleshooting
6Fault codes
| Code | Meaning |
|---|---|
| 81 u | Generator set output frequency cannot be maintained. |
| 59 | High AC voltage shutdown (Output voltage on any phase exceeds pre-set values). |
| 27 | Low AC voltage shutdown (Voltage on any phase has dropped below a preset value). |
Symptoms & remedies
| Symptom | Remedy |
|---|---|
| Output voltage on any phase exceeds pre-set values. | Values adjustable from 105-125% of nominal voltage, with time delay adjustable from 1-10 seconds. Default value is 110% for 5 seconds. |
| Voltage on any phase has dropped below a preset value. | Adjustable over a range of 50-95% of voltage, time delay 2-20 seconds. Default value is 90% for 5 seconds. |
| Low oil pressure or high coolant temperature | The control (with graphical display) will light a yellow Warning lamp or a red Shutdown lamp and display a message on the graphical display. A control without the graphical display indicates a shutdown condition by intermittent flashing of the status indicator. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Cummins/Onan C33 D5 troubleshooting guide (16 entries) →
Parts
35| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 0193-0430-01 | Sender-Pressure | 1 | Sensor | Amazon $35.99 eBay $22.20 FridayParts $29.60 |
| 0193-0432 | Thermostat | 1 | Thermostat | Amazon $76.00 eBay |
| 0502-1507 | Adapter-Hose (Oil) | 1 | Hose | Amazon eBay |
| 0100-3922 | Engine-B3.3G1 | 1 | Service part / kit | Amazon eBay |
| 0155-4215 | Guard-Exhaust (Support) | 2 | Service part / kit | Amazon eBay |
| 0155-4311-02 | Guard-Exhaust | 1 | Service part / kit | Amazon eBay |
| 0320-1981-01 | Accessories-CB (SD Contact) | 1 | Service part / kit | Amazon eBay |
| 0320-1981-02 | Accessories-CB (Shunt Trip) | 1 | Service part / kit | Amazon eBay |
| 0320-2225-01 | Accessories-CB (Shunt Trip) | 1 | Service part / kit | Amazon eBay |
| 0320-2225-02 | Accessories-CB (SD Contact) | 1 | Service part / kit | Amazon eBay |
| 0331-0618-02 | Locknut Conduit | 2 | Service part / kit | Amazon eBay |
| 0332-4001-01 | Rail-Terminal Block (300mm) | 1 | Service part / kit | Amazon eBay |
| 0337-3583-04 | Strap-Ground | 2 | Service part / kit | Amazon eBay |
| 0338-4487 | Harness-Engine (Mechanical governor) | 1 | Service part / kit | Amazon eBay |
| 0338-4720 | Harness-Engine (Electronic governor) | 1 | Service part / kit | Amazon eBay |
| 0338-4819-02 | Harness AC | 1 | Service part / kit | Amazon eBay |
| 0338-4819-03 | Harness AC | 1 | Service part / kit | Amazon eBay |
| 0504-0264-01 | Valve-Hydraulic (Oil) | 1 | Service part / kit | Amazon eBay |
| 0505-0019 | Bushing-Reducer | 1 | Service part / kit | Amazon eBay |
| 0505-2235 | Adaptor-Pipe | 1 | Service part / kit | Amazon eBay |
| 0526-0399-56 | Washer-Flat (M5) | 2 | Service part / kit | Amazon eBay |
| 0526-0399-60 | Washer-Flat (M8) | 4 | Service part / kit | Amazon eBay |
| 0526-0399-62 | Washer-Flat (M10) | 2 | Service part / kit | Amazon eBay $4.00 |
| 0800-0309-93 | Screw-Hex Head (M5) | 2 | Service part / kit | Amazon eBay |
| 0800-3017-19 | Screw-Hex Head (M8 X 20) | 2 | Service part / kit | Amazon eBay |
| 0800-3017-35 | Screw HHC (M10) | 1 | Service part / kit | Amazon eBay |
| 0800-3017-37 | Screw-Hex Head (M10 X 25) | 2 | Service part / kit | Amazon eBay |
| 0850-0114-52 | Washer-Lock (M5) | 2 | Service part / kit | Amazon eBay |
| 0850-0114-54 | Washer-Lock (M8) | 2 | Service part / kit | Amazon eBay |
| 0850-0114-55 | Washer-Lock (M10) | 2 | Service part / kit | Amazon eBay |
| 0862-0026-55 | Nut-Hex (M8) | 2 | Service part / kit | Amazon eBay |
| 0862-0026-56 | Nut Hex (M10) | 1 | Service part / kit | Amazon eBay |
| 0872-0020-01 | Standoff | 2 | Service part / kit | Amazon eBay |
| 0872-0021 | Standoff | 1 | Service part / kit | Amazon eBay |
| 961-0518 | (Issue1) | 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
Spec sheet — Cummins-C38D5-Spec-Sheet (Cummins/Onan)Spec sheet — SS23-CPGKParts manual — 906-0103 Cummins C22D5 C25D6 C30D6 C33D5 Parts (8-2006) (Cummins/Onan)Parts manual — 906-0122 Cummins C33D5 C30D6 Parts (7-2004) (Cummins/Onan)Service manual — 900-0910 Cummins C33D5 - C35D6 Repair Times (Cummins/Onan)Service manual — C3xDx Generator Service Manual (Cummins/Onan)