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joe shelton (Littlewind) (67.241.230.27)

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Posted on Monday, August 05, 2002 - 10:44 am:   

I want to replace my air compressor. Should I rebuild the one I have, buy a used one or trade it in? Getting core trade-in price from deans coach.

And whats to changing one out (i.e. any tricks or heads-up on remove & install)?

joe 4106-2119
Scott Whitney (66.82.32.1)

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Posted on Monday, August 05, 2002 - 1:31 pm:   

Hi Joe,

I changed out my TuFlo-700 last year. I did some research and learned it was cheaper and easiest to just buy a rebuilt unit. (part number ends in 'R' if I recall) I also found that my local truck shop had as low a price as I could find anywhere on the Net.

Mine sits on an 8V71 transverse mount (flxible transit). So accessability is great - chest height right in front. You have a GM if I recall? So it is probably in the same spot. However, it was still a big help to have two people.

Getting the locking nut off the old compressor w/o spinning the thing was interesting. (you'll need the gear widget as it doesn't come with the compressor) They probably make some special tool that locks the gear teeth so you can turn the nut. What we did was take the mating piece off the engine and held it with a pipe wrench if I recall. Not elegant, but worked.

Upon reinstalling, lining up the teeth is not easy either. I held the compressor on the studs and pushed while a friend slowly turned the crankshaft with a breaker bar until the teeth lined up and she slid on. What I should have done, but didn't cause I didn't know better at the time, was to tie off the engine shut down solenoid to make sure it would not start accidentally by hand cranking it.

Maybe yours is belt driven and all the above is irrelevant.

That is about all I can think of. The rest is just connecting coolant lines, air lines, replacing the goveneror, etc.

(Oh, make sure all the plugged ports that come with the unit are tight.)

Scott
joe shelton (Littlewind) (67.242.199.216)

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Posted on Monday, August 05, 2002 - 2:16 pm:   

I got a rebuilt price from deans coach for $430. My pockets are some what shallow so that's a bit much for me.

found a used one for 175. I'm up in the air between used & rebuilt.

I really want an uploader replacement kit and discharge parts.

joe
Jim Ashworth (Jimnh) (172.152.39.76)

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Posted on Monday, August 05, 2002 - 5:42 pm:   

Joe- What makes you think the used one is any better than the one you have? Your's is used, too. Air on a bus is like blood in your body. Without it- you don't go. If you put a rebuilt on, it will likely outlast you and the bus. This is not the time to be penny wise and pound foolish. Save up and do the job once and do it right.

Jim
Scott Whitney (66.82.9.25)

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Posted on Monday, August 05, 2002 - 6:51 pm:   

Ouch. $430 does sound steep. I think I paid about three bills for mine. What model do you need? Might call Luke.

I agree with Jim, though. No sense in putting a used one on. Only way I would do that is if it were from a wreck and they could prove that it was very low miles. (hours?)

Scott
jmaxwell (66.42.92.9)

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Posted on Tuesday, August 06, 2002 - 2:48 am:   

Ure best price is probably going to be at a truck parts house. Local one here had a deal last summer where u could actually make $25 on the deal; the core charge was $25 above their sale price on a rebuild.
joe shelton (Littlewind) (67.241.230.136)

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Posted on Tuesday, August 06, 2002 - 5:09 am:   

Here is a good site for reviewing compressor maintenance and more.

http://www.bendix.com/products/Compressors.shtml

Also provided the uploader kit p/n
Steven Gibbs (12.148.43.8)

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Posted on Tuesday, August 06, 2002 - 10:38 am:   

Joe,

I think my net price with 300.00 core credit was 275.00 through MCI.

Don't turn the crank shaft on the engine. Put a socket on the compressor and turn the compressor crank a little bit at a time then try to line up. And, yes, tighten all the plugs (even the ones you don't need) since the factory only hand tightens. (hard lesson learned) had to remove and reinstall since the plug I missed was inaccessable with unit installed.

Steve
MC-9
Pontiac
joe shelton (Littlewind) (67.241.228.221)

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Posted on Tuesday, August 06, 2002 - 1:13 pm:   

Thanks everyone! Good stuff. I found an unloader replacement kit at my local truck shop for $22. When I do need to replace I'll check MCI. Joe

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