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Discussion Starter #1
For grins and giggles, I getting ready to take off my Racor set up and putting
in a CAT set up on the frame. I machined out the cast CAT base and all fitting
openings to 23/64 th's to provide the maximum opening. I believe the I/D of our
fuel lines is 26/64th's.

Question......... Do I use any teflon compound on the threads of the fittings with
the O-Rings that marry to the CAT base? Also, how much torque are you applying
at these O-ring fittings?

Edited by: 56Nomad
 

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I did not put teflon on mine and hasnt leaked in 15000 miles


I put a little lube on the o-rings and got it snug, probably 15-20 FTlbs.Edited by: Big Red Max
 

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Discussion Starter #3
Big Red Max.......

I don't think you'd see a leak since have a vacuum
system. If nothing burbs, yep no leaks.
 

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OK I'll bite. Why are you changing filter setups?
 

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Discussion Starter #5
I'm retired with lots of time on my hands........ plus I like to tinker
on my truck


I actually like the Racor better, with the clear fuel bowl and
if I lived in cold weather it would definitely stay on because
of the heater option.

But here in the Santa Cruz, CA area...... no one will order me a
Racor filter
There are no vendors locally for Racor. We do
have Marine West, but the salesman could not help me in
ordering the R60S. The Cat dealer is a couple of miles away
and the 1R-0750 is well stocked, so that's why I'm switching.
 

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I know the pipe thread sealant question has it been briefly discussed before, but I've never heard CAT's view on it. Are there any install instructions?
 

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Well, your's looks different than mine (straight vs 90 on mine and no on/off valve), but to your point, the instructions say to put it on the brass hose fitting, threaded side. I'll do that with mine, but there's an O-ring for that to seat against too, so don't think it should be needed.
 

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someone on this site had said not to use teflon tape, and to use the paste, as the (tape will damage the injection system if it gets in it). Just a messenger of info. Fran
 

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04wanabemax said:
someone on this site had said not to use teflon tape, and to use the paste, as the (tape will damage the injection system if it gets in it). Just a messenger of info.   Fran
In addition to the contamination problem Fran pointed out, from what I've read Teflon tape is also not recommended for applications where vibration is present - its good for static conditions (like domestic plumbing) but not on a moving/vibrating machine.Edited by: jbplock
 

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56Nomad said:
Big Red Max.......

I don't think you'd see a leak since have a vacuum
system. If nothing burbs, yep no leaks.
[/QUOTE


It will leak when the truck is not running. I had a compression fitting that did not seal properly and leaked. The strange thing is I never had a problem with air in the line the 400miles I drove with the leak. There was never any air present at either filter when I checked before fixing the leak.
 

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Nomad, Your picture shows the correct way as far as I can see. There is nothing wrong with Teflon tape on any installation. Teflon tape and any other sealer is only a problem when you disassemble a system. It is a common practice to use it on stainless hydraulic systems both mobile and stationary. A lot depends on the maintenance supervisor in each location. Never put any sealer on the first thread or two. All sealers will ball up when you disassemble a system and the remainder should be wire brushed off. Nice looking set up. Later! Frank
 

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FYI - w/ o-ring boss connectors pipe dope/teflon tape is not required. that's from the old man and the hydraulic store plus my neighbor that works for CAT..
 

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Didn't mean to imply sealer went on the "0" connections, only on the tapered treads. Later! Frank
 

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56NOMAD,


Use RectorSeal #5. Available at Home Depot, etc...


Josh
 

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I didn't use any sealer when I went with the cat head. Brass is a very soft metal, when you use fittings that are tapered and mate in a brass material they will actually conform to each other as they are tightened. Now I'm not saying it wouldn't have it's benefit of a just in case situation, but shouldn't really be needed.


Now with my new permacool head I used Loctite thread sealer(white tube and can't remember the number).
 
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