Specifications
| Frequency | 50.0 Hz |
|---|---|
| Standby power | 1540 kW |
| Prime power | 1400 kW |
| Emissions | 2g TA Luft – EPA Tier 2 |
| Controller | PowerCommand digital |
| Oil capacity | 204.0 L |
| Alternator | Permanent Magnet Generator (PMG) (4-pole, Class H insulation) |
| Voltage options | 60 V, 50 V |
| Phase | A (U), B (V), C (W) |
| Battery cranking | 1800 CCA |
| Dimensions (L×W×H) | 6381×2285×2474 mm |
| Dry weight | 11926 kg |
Engine
| Oil capacity | 204.0 L |
|---|---|
| Coolant capacity | 161.0 L |
| Displacement | 50.3 L |
| Aspiration | 4-cycle industrial diesel |
| Rated speed | 1900 rpm |
Filters for the Cummins/Onan QSK50
1Engine-mounted filters the filter manufacturers list for this engine family. These come from the engine, not from this generator set’s own parts list, so confirm against your serial number before ordering.
Listed for this engine in only one kind of machine, so they may depend on how the engine was installed:
| System | Filter | Description | Cross-references | |
|---|---|---|---|---|
| Fuel / water separator | P550849 | Fuel Filter, Water Separator Cartridge | CUMMINS 3944901S, NAPA 3763, BALDWIN PF7928, DAVCO 102526 | FridayParts $20.90 KuduParts $39.00 |
Maintenance & consumables
for the Cummins/Onan QSK50| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | ||||
| Fuel filter | Fleetguard® ES Filtration, CENTINEL™ | — | |||
| Oil filter | Fleetguard® ES Filtration, CENTINEL™ | — | |||
| Battery | — | ||||
| Belt | — | ||||
| Coolant | CENTINEL Advanced Engine Oil Management System | — | |||
| Oil | Cummins Prelub System | — | |||
| Spark plug | — |
Common questions
What size generator is the Cummins/Onan D-3521?
The Cummins/Onan D-3521 is rated 1540 kW standby.
Which engine powers the Cummins/Onan D-3521?
The Cummins/Onan D-3521 is powered by the Cummins/Onan QSK50 engine.
How much oil does the Cummins/Onan D-3521 take?
The Cummins/Onan QSK50 engine in the Cummins/Onan D-3521 has an oil capacity of 204.0 liters.
How much coolant does the Cummins/Onan D-3521 hold?
The Cummins/Onan D-3521 cooling system holds 161 liters (42.5 US gallons) for the engine, per the manufacturer specification sheet.
What is the continuous rating of the Cummins/Onan D-3521?
The Cummins/Onan D-3521 is rated 1400 kW prime, against 1540 kW standby.
How much does the Cummins/Onan D-3521 weigh?
The Cummins/Onan D-3521 has a dry weight of 11926 kg (26292 lb).
What voltage does the Cummins/Onan D-3521 produce?
The Cummins/Onan D-3521 is offered in 60 V, 50 V, A (U), B (V), C (W)-phase.
How many cold cranking amps does the Cummins/Onan D-3521 require?
The Cummins/Onan D-3521 uses 1800 CCA, per the manufacturer specification sheet.
Which alternator is fitted to the Cummins/Onan D-3521?
The Cummins/Onan D-3521 uses a Permanent Magnet Generator (PMG) alternator. It has 4 poles. Insulation class H.
Parts
11| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 140-3963 | Cleaner, Air (Spec A-C Metal) | 2 | Air filter | Amazon |
| 149-2792 | Filter, Fuel | 1 | Fuel filter | Amazon eBay |
| 501-0970-01 | Line, Fuel | 1 | Hose | Amazon eBay |
| 503-1705 | Hose, Hump | 2 | Hose | Amazon eBay |
| 503-2754-01 | Hose, Oil | 1 | Hose | Amazon eBay |
| 503-2754-02 | Hose, Oil | 1 | Hose | Amazon eBay |
| 543-0088 | Package, Fuel Filter | 1 | Fuel filter | Amazon eBay |
| 6794600 | Washer, Sealing | 1 | Seal | Amazon eBay |
| AF2559300 | Air Cleaner replacement element (Nelson), for Air Cleaner Housing 140-3737 | 1 | Air filter | Amazon eBay |
| 102-1335 | Plug, Oil Drain | 1 | Service part / kit | Amazon eBay |
| 140-1548 | Indicator, Service | 1 | Service part / kit | Amazon eBay $49.99 NAPA $32.16 |
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
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.