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Old 09-07-2014, 06:08 PM   #1
KIX
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ENGINE Air Compressor Help

I need to remove the engine air compressor to be able to access the ESS and EPS. The compressor appears to be mounted directly to the hydraulic pump. So, after removing hoses do I just unbolt the hydraulic pump and air compressor assembly as one unit??
Thanks for any help
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Old 09-07-2014, 06:37 PM   #2
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Check the Cummins engine books real close. Some of these direct drive units need to be "timed" after installing. Not sure which, and not sure exactly how it needs to be done, but I'm sure it's in the Cummins maintenance procedures.
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Old 09-07-2014, 06:46 PM   #3
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Thanks Pigman.........I need to call Cummins to find out how to time it if needed.
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Old 09-07-2014, 07:00 PM   #4
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RTFM...Read the fine manual!

Best to get a copy of the factory maitenace manual and read it 3 times before you do anything.

First time is new to brain and it does not make anyy sense.

Second time brain is not surprised.

Third time brain has seen it twice and telling you it is ready..

The manual should hsve details regarding what to remove in what order and warnings aboit that 5 cent pin that may fall out.

It slso should describe installation and setup with timing if needed.

Be carefull of dirt!
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Old 09-07-2014, 11:38 PM   #5
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Not sure if the same setup, mine is an older mechanically injected C. I haven't had to remove mine but I have studied the manual. On mine the compressor is gear driven off the cam gear and the hydraulic pump is piggybacked onto it. It is water cooled with coolant lines from the engine and uses engine oil for lubrication. It is indeed timed with markings on the gears for balance. If I remember right, it depends on the brand compressor installed as to what marks you should see on the gear. Manuals should be available online at cummins quickserve.
The lower right gear in this photo shows the compressor gear. I had an oil leak between the gear housing and engine block so lots of stuff had to be removed. The gear housing came off over the compressor gear without removal of the compressor so I would assume the compressor could be removed without pulling the gear off the shaft. I think you would still have to remove the gear cover as in this picture for timing though.
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Old 09-09-2014, 06:35 PM   #6
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Update

I didn't have to remove the air compressor after all. I did remove the hydraulic pump that was mated to the air comp. That gave enough access to get the ESS and EPS changed. Thanks for the help guys.
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