Bendix TU-FLO 300 Air Compressor for Cat 944

VaTom · Jan 5, 2015

OK, both Cat (their part 9M5475) and Bendix both tell me this small air compressor is too old to supply parts. The compressor Cat listed for replacement is also obsolete. Far as they're concerned I've got a tractor (944) with no brakes, other than dropping the bucket.

I found a rebuild kit for the governor and a few compressor parts at Off Road Equipment, not unusual for them to have Cat parts that Cat no longer does. Best thing about a rebuild kit is it includes instructions. I'm a little afraid to go very deep into the compressor without.

Considering how it failed, suddenly, my guess is a governor problem. While I had it off, I figured it was a good time to go through both.

Anybody have other parts sources they would share? I live on a mountain, brakes are necessary.

NCWayne · Jan 5, 2015

If I'm not mistaking the only real difference between the TU-FLO compressors like the 300, 400, 500, etc, it that as the number increases the CFM becomes a little more. That being the case, why not just get a 400, that appears to still be available, as a replacement. I can't find a CFM output for the 300, but looking at the others, they appear to step up in relatively small steps. That being the case the engine isn't going to ever notice the increase in power needed for that little bit extra.

In the end it might cost a little more, but you'd have a compressor that you wouldn't have to worry about.

jean claude marleau · Jan 5, 2015

I do have a good used Tu-Flo 300 air compressor for sale. . My e mail is [email protected]

VaTom · Jan 6, 2015

Thanks guys.

Part of what I was trying to avoid was changing the mounting. I've got a larger compressor in a spare deuce-and-a-half that I could probably get to work. Close fit on whether it would go under the engine cover, but this is a working tractor.

Right Wayne, more cfm wouldn't be any problem, and power loss negligible. I'm sure Bendix would tell me the mounting differences.

That's interesting Jean Claude, but I'm not sure yet that I have a compressor problem. First warmer day I'll learn that.

I wasn't smart enough to build an adequate shop to get this tractor inside. Larger than anything I ever expected to own. When there's a little wind in the area, there's a lot of wind on this mountain.

AJ. · Jan 6, 2015

Have you established whats wrong with the compressor,if there is a carbon build up in either of the valves it will not pump air,take the head off and have a look,the compressor draws in air through the inlet valve on the downward stroke,on the upward stroke the inlet valve closes and air is pushed out through the outlet valve to the reservoir,that valve should not be able to leak back,when a pre set pressure is reached air passes through the regulator valve and goes into the inlet valve chamber holding the valve open,now the piston is pulling air in and pushing it out again through the inlet valve till the pressure drops and the inlet valve closes and the cycle keeps repeating,if for any reason the valves are been held open it will not build up pressure.
AJ

VaTom · Jan 6, 2015

Thank you AJ, I have not. I'll try to figure this out tomorrow , no chance of my wanting to reinstall outside with wind chill around 10º. Not sure my parts diagram lists which valve is which, but if I can get to them it should be obvious if there's a build up.

Part of my looking for a rebuild kit was to get instructions. Off Road had some parts that were in the (unavailable) rebuild kit, but no instructions.

I've dealt with shop air compressors a couple of times, this doesn't look like them even if the function is similar.

Bendix TU-FLO 300 Air Compressor for Cat 944

VaTom

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NCWayne

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jean claude marleau

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VaTom

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AJ.

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VaTom

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