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Old 05-29-2007, 09:45 AM   #29
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One thing that hasn't been mentioned is the vertical pivot arm visible when you roll out the gen slide. This gizmo has no grease fitting, at least on older models like mine (08/06). Workhorse (who bought the old General Motors chassis works that produced P30 and P40 series chassis for motorhomes and delivery vans) now uses the same brake system on some of their rigs, and they put a zirc fitting on the vertical pivot arm. Seems that somewhat randomly that pivot mechanism, which I think is just a bushing) is subjet to corrosion sufficient to inhibit the arm action. It doesn't take a lot of friction in the right place to make a system difficult to operate. Usually this means hard to push and hard to return also, IIRC from when I was looking at that, but with differences in hydraulic pressures that have been reported there might also be a hard-to-push-sufficient-boost-to-return variant as well. Those w/difficult braking might want to check this out. A zirc fitting is cheap to install and most DIY'ers can do it easily.
I thought there was a thread on this earlier including a photo, but it may have been on the Workhorse Custom Chassis Forum (I didn't find it there on a quick search; I probaly don't know how to spell 'zirc' properly).
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Old 05-29-2007, 10:45 AM   #30
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I had mentioned that I would report on my factory appointment and to tell about what I found out about the brake pressure issue. Well, I really didn't find out much, even though I asked 2 or 3 times. What I got was that the engineering staff would look into it. I left on Friday, without anyone reporting back - sorry.

My week at the factory, in general, was favorable. The service writers and techs had good attitudes. Their follow up on on-going projects made me check on progress a little more closely. They are operating with about 20 folks short making even small projects, more time-consuming than they should. I had a face to face with Richard Fish. If anyone can bring this company back, he should. He is well aware of the company's shortcomings. Meetings don't get my roof fixed, but the production and services management staff are meeting regularly, resulting in greater appreciation of each areas problems.

The good and the bad is that it is a 37 year old company. They definitely have a good product but they definitely need attitude adjustments.

I have written to them following my appointment and expressed the fact that I notice improvement in the service area but expressed my disappointment in not receiving a response to my brake question even if is an answer I didn't want to hear.

To summarize what I am trying to say is that the company is on the right track but it is going to take time. It takes time to find and train good people. It appears that they are beginning to listen to the end users. None of the management-types are RV users.
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Old 05-29-2007, 10:48 AM   #31
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The proper spelling is Zerk.

If at all possible, when buying the fitting, get the Alemite brand. As cheap as they are, going for the best (Made in USA) quality only makes sense.

You will need a 1/8 NPTF (NOT NPT) tap to create a proper thread. Also, if you can get it, buy the tapered Reamer to dress the hole the fitting will thread to.
When tapping the thread, do not turn the tap in too far as it will compromise the thread. Generally speaking, run the tap in only far enough to allow the fitting to thread about 5/8 up the length of the thread. When the hole is completed, run the fitting into the tapped hole by hand until you can't turn it further. Then, using a small wrench, tighten the fitting about 2 turns.

Finally, although the NPTF thread was designed to eliminate the need for it, 1-1/2 to 2 turns of Teflon tape can't hurt.

Make sure there are no shavings in the assembly!

BTW, the hole for the thread should be drilled with a 5/16 diameter drill.
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Old 05-29-2007, 11:07 AM   #32
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Oh great.
The last statement conjures an image of a Gastroenterologist performing a Craneotomy.

Forgive me but I still believe in "it takes one to know one".
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Old 05-29-2007, 05:15 PM   #33
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Bob & Peg, are you certain of the thread you are referencing. NPTF,American National taper pipe thread for dryseal pressure-tight joints. Most unusual for some of us typical layman. Mike E could certainly shed some light on this subject and yes Mike it is a Zerk fitting. Doesn't matter as we all understood that part.
Thanks for all of your input,I really find it enjoyable as well as extremely informative. What is your thought on the pipe thread issue?
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Old 05-29-2007, 07:24 PM   #34
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Was the 45' 06 air brakes or hydraulic?

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Old 05-30-2007, 01:08 AM   #35
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Yes, I am certain it is NPTF, the "Dryseal" thread you described.

The Male NPT thread has truncated crests where the Male NPTF crest is fully developed. The theory is that the sharp male thread will deform to comply with the truncated female thread to form a joint having no path for fluid passage. An interference fit.
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