Bypass AirPump
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Joined: Dec 2003
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Bypass AirPump
I have a 1995 7.5L in my Class C motorhome. The airpump is pulley is starting to squeal.
Can I bypass the airpump and use a shorter belt to go from the fan to the alternator? Will it hurt anything? If I do have to replace the airpump, is it hard?
Can I bypass the airpump and use a shorter belt to go from the fan to the alternator? Will it hurt anything? If I do have to replace the airpump, is it hard?
Posting Guru
Joined: Feb 2007
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If the bearings are making noise, you can take it apart and grease them. They are not supposed to be servicable, but they can be taken apart and reassembled without damage. I took mine apart, gutted it, greased the bearings, and put it back together.
I tried using a shorter belt and it didn't work. I used the same length belt everyone else used on the 351 (94.5") and it started jumping off as soon as it stretched a little. If you are interested in taking it apart, I will give you a more detailed explanation on how to do so.
Good luck!
I tried using a shorter belt and it didn't work. I used the same length belt everyone else used on the 351 (94.5") and it started jumping off as soon as it stretched a little. If you are interested in taking it apart, I will give you a more detailed explanation on how to do so.
Good luck!
pedant
Joined: Jan 2008
Posts: 23,576
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From: EXTREME southwest CT
If there's a tight spot I doubt lubing the bearing will help for long.
A.I.R. pumps are available at reasonable cost from places like LMC. (this is where I got mine)
I don't know how your later serpentine belt is routed, but you can bypass them on an older Vee belt system like mine easily enough.
It is no more difficult than replacing an alternator.
A.I.R. pumps are available at reasonable cost from places like LMC. (this is where I got mine)
I don't know how your later serpentine belt is routed, but you can bypass them on an older Vee belt system like mine easily enough.
It is no more difficult than replacing an alternator.
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