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Old 02-08-2019, 04:07 PM   #1
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Cummins parts....

I've heard of a few instances here where the AC compressor cratered and took out the belt on Berkshires with the 6.7 Cummins.

I carry a spare belt, but without the compressor that isn't much help. We have talked about getting a smaller belt to bypass the compressor, but no one seems to have the right size/numbers. I have found pictures of the engine with a pulley where the compressor sits.... Anyone know of a source where I could get a (used?) pulley AND bracket for not too much $$ ?

Plan would be to do an emergency repair where I pull the compressor, install the pulley and new belt, hang the compressor off to the side and then be able to get to a place where I can effect the permanent repair....

One assumption here is that the belt size is the same whether the compressor is on there or the pulley.... Once I get it I'll have to take a close look at that, and MAYBE even do a test run.
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Old 02-08-2019, 04:13 PM   #2
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Where is the compressor on that engine you have the picture of?
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Old 02-08-2019, 04:24 PM   #3
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It isn't, the picture is not of my engine.....

On our engines it is in place of the pulley that the arrow is pointing at. So I want to have the pulley with me to put on there when the compressor craters and run sans compressor until I can fix it.

This is an emergency plan....

Trying to find a cheap source for the bracket. Haven't talked to my Cummins dealer yet, but suspect it will not be cheap from him. Since I don't need it on there, I can settle for a used one.
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Old 02-08-2019, 04:44 PM   #4
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Can you run without a compressor ?

I assumed that the the compressor was required to provide compressed air for the braking system ?
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Old 02-08-2019, 04:59 PM   #5
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Take a rope and run it around the pulleys that will be used if the AC compressor needs to be removed then take it to an auto parts store and get the right size, just make sure you go a little bigger to make sure it isn't to small, you will also need to make that no pulleys will be running backwards in that scenario, I have by passed AC compressors and air pumps (smog) on engines before until I could get the defective part replaced.
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Old 02-08-2019, 05:04 PM   #6
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Quote:
Originally Posted by raidernation View Post
Can you run without a compressor ?

I assumed that the the compressor was required to provide compressed air for the braking system ?
I'm talking about the Air Conditioning compressor..... The air compressor is on the other side of the engine.
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Old 02-08-2019, 05:05 PM   #7
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Quote:
Originally Posted by wildcatter View Post
Take a rope and run it around the pulleys that will be used if the AC compressor needs to be removed then take it to an auto parts store and get the right size, just make sure you go a little bigger to make sure it isn't to small, you will also need to make that no pulleys will be running backwards in that scenario, I have by passed AC compressors and air pumps (smog) on engines before until I could get the defective part replaced.
That is an option although I remember doing that on another motor when I did a modification and having to go back three times until I got the right size....
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Old 02-08-2019, 05:30 PM   #8
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I don't know how hard it will be to change the bracket vs: changing the compressor.
A truck service/dealer should be able to supply a new compressor for $2-300 and you could mount without hooking the lines or wiring up if an emergency repair. Might still need a belt and would still leave you working on a hot engine.
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Old 02-08-2019, 08:38 PM   #9
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I have a belt and I'll let it cool.

I do like the idea of bringing a compressor... That way I KNOW it's the right dimensions. The clutch would not engage as it's not hooked up....

Hmmm.....
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Old 02-08-2019, 08:49 PM   #10
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I am one that had the A/C Compressor seize up and cut the belt. The belt cut the wires to the Horton Fan controller and broke the bracket for the controller. I had the same idea of pulling the compressor, using a short a belt.
I drove about 50 miles from Lordsburg, NM to Wilcox, AZ to NAPA Auto parts and purchases a belt to fit a 5.9 without A/C and it was to long.
I ended up calling a Tow Truck and had our 2011 Berkshire towed 178 miles to Tucson FreightLiner.
We had not used the A/C for our trip from Fort Worth Texas.
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