Allis-Chalmers 21000 MKII Engine Engine
The Allis-Chalmers 21000 MKII is a 13.8 L 8-cylinder natural engine rated at 1800 rpm, producing up to 200 kW. It powers generator sets from Cummins/Onan, including the DYH 200 kW and DYH 250 kW. It holds 11.25 L (3.0 gal) of oil and 16.5 L (4.4 gal) of coolant.
Also known as: Allis-Chalmers 21000 MKII
Part of the Allis-Chalmers 21000 engine family — 2 variants share parts & fitment.
Engine specifications
| Oil capacity | 11.25 L |
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| Coolant capacity | 16.5 L |
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| Displacement | 13.8 L |
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| Cylinders | 8 |
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| Aspiration | Natural |
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| Rated speed | 1800 rpm |
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| Gross power | 200 kW |
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Generator sets powered by this engine
2Common problems
6- Overcrank fault lamp lights and engine stops cranking after approximately 75-seconds.
Fix: See engine service manual for troubleshooting fuel system. After correcting fault, reset engine monitor relay by placing Run-Stop/Reset-Remote switch to Stop/Reset position, depressing Reset button, then to the required running position. - Low oil pressure shutdown.
Fix: 3. Check — a. Oil level. Replenish if necessary. b. Sensor. Faulty sensor will shut down engine. c. Refer to engine service manual for troubleshooting guide for oil system. - High engine temperature shutdown.
Fix: 4. Check — a. Coolant level. Replenish if necessary. b. City water cooled sets. Check water flow, valves, etc. c. Check sensor; check thermostat. d. Radiator model, check fan belts, radiator for obstructions, etc. - Fault lamp lights immediately after engine starts.
Fix: Check for: Overspeed condition as engine starts. - Engine stops cranking and fault lamp lights, after cranking approximately 75 seconds.
Fix: See engine service manual for troubleshooting fuel system. After correcting problem, reset engine monitor relay by placing Run-Stop/Reset-Retrieve switch to Stop/Reset, then back to the required running position. - Engine runs, shuts down, cranks for 75-seconds, cranking cycle stops, overcrank light ON.
Fix: 1. See engine service manual for troubleshooting fuel system. After correcting fault, reset engine monitor relay by placing Run-Stop/Reset-Remote switch to Stop/Reset position, depressing Reset button, then to the required running position. 2. Check fuel supply.
Compiled from service & troubleshooting documentation across every generator set that uses the Allis-Chalmers 21000 MKII.
Also used in
12- Allis-Chalmers 555 — Backhoe Loader
- Allis-Chalmers 560 — Construction Equipment
- Allis-Chalmers D560 — Construction Equipment
- Allis-Chalmers D562 — Construction Equipment
- Allis-Chalmers DES200 — Generator Set
- Allis-Chalmers DES220 — Generator Set
- Allis-Chalmers DES250 — Generator Set
- Allis-Chalmers DES275 — Generator Set
- Fiat 21B — Dozer Tracked
- Fiatallis 21B — Dozer Tracked
- Kenworth K100 — Truck
- Kenworth W900 — Truck
Other equipment known to use this engine, via filter-application cross-reference — useful for sourcing parts even when your exact machine isn't listed elsewhere on this page.
Common questions
What is the oil capacity of the Allis-Chalmers 21000 MKII?
The Allis-Chalmers 21000 MKII engine has an oil capacity of 11.25 liters.
What is the displacement of the Allis-Chalmers 21000 MKII?
The Allis-Chalmers 21000 MKII has a displacement of 13.8 liters with 8 cylinders.
Which generators use the Allis-Chalmers 21000 MKII engine?
The Allis-Chalmers 21000 MKII powers 2 generator set(s), including Cummins/Onan DYH 200 kW, Cummins/Onan DYH 250 kW.
What is a common problem with the Allis-Chalmers 21000 MKII engine?
A commonly reported issue on generators using the Allis-Chalmers 21000 MKII is: Overcrank fault lamp lights and engine stops cranking after approximately 75-seconds.. Fix: See engine service manual for troubleshooting fuel system. After correcting fault, reset engine monitor relay by placing Run-Stop/Reset-Remote switch to Stop/Reset position, depressing Reset button, then to the required running position..