grease zerk - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 7 (permalink) Old 10-09-2014, 04:15 AM Thread Starter
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grease zerk

My grease zerk on my steering box is leaking fluid. I want to replace it but its like pressed in. Anyone had this problem before
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post #2 of 7 (permalink) Old 10-09-2014, 05:30 AM
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All the zerks I have seen have threads that hold it in. Is there nut like flats that a wrench can get hold of?

Dave

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post #3 of 7 (permalink) Old 10-09-2014, 02:25 PM
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There are press type grease fittings. They have a serrated shank instead of threads. Used in low pressure applications, cheaper manufacturing, only drill hole and tap into place, no threads to tap.
http://www.saeproducts.com/drive-typ...-fittings.html

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post #4 of 7 (permalink) Old 10-11-2014, 01:21 PM
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Drive in grease zerks are commonly found on riding lawn mowers and some cheaper lines of smaller farm implements. You might try a small engine type place that services things like that. Most of the ag dealerships in this area service both.
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post #5 of 7 (permalink) Old 10-11-2014, 03:03 PM
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Power steering fluid is leaking out of the grease fitting on your steering box?
There are needle bearings on both ends of the sector shaft.
The inner one is lubed when the steering box is assembled.
The outer one is lubed by the grease fitting.

There are seals on both sides of the outer needle bearing.
The outer seal keeps the dirt out of the needle bearing and the grease in.
The inside seal keeps the power steering fluid inside steering box.

It sounds like the inner seal is starting to leak letting oil into the needle bearing.
Your steering box probably needs to be resealed or replaced.

Terry
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post #6 of 7 (permalink) Old 10-11-2014, 09:14 PM
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Quote:
Originally Posted by terry_g View Post
Power steering fluid is leaking out of the grease fitting on your steering box?
There are needle bearings on both ends of the sector shaft.
The inner one is lubed when the steering box is assembled.
The outer one is lubed by the grease fitting.

There are seals on both sides of the outer needle bearing.
The outer seal keeps the dirt out of the needle bearing and the grease in.
The inside seal keeps the power steering fluid inside steering box.

It sounds like the inner seal is starting to leak letting oil into the needle bearing.
Your steering box probably needs to be resealed or replaced.

Terry
You may well be right about that. I never actually went any deeper than to change the top seal (outer). But years ago when I was generally too busy and just had mine serviced at Speedco or whatever I had the same thing happen right after getting it serviced. I had noticed it was always greased or actually IMHO, overgreased. I replaced top seal, greased it and then removed grease zerk. Ran it that way for probably 10 yrs and 800k before I had the whole thing pulled, freshened and resealed because it was leaking at the arm.

While on that subject, I will give Lucas PS fluid a plug. That arm started leaking originally right after I bought the truck. It had around 500k at the time. It leaked enough to leave a small puddle the size of your hand everytime I would back in a dock and idle for an hour or so. (hot weather) When I got home, I started checking on getting it fixed and the shops just wanted to replace box with a rebuilt. Money was tight and someone mentioned trying Lucas. I drained resevoir down pretty low and added Lucas to the point of probably 3:1 Lucas PS fluid to OE PS fluid. It stopped leaking completely. Ran it 1 mil miles before it give any trouble again. With exception of when I had a hose let go and couldnt get the Lucas to put back in it. Then it leaked again. And when I say leaked I mean seeped pretty good. And when I say stopped, I mean stopped-dry.
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post #7 of 7 (permalink) Old 10-14-2014, 12:11 AM
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That zerk leaked on the box of my 900L. Put a little stop leak in to top it off, and since getting the kingpins redone, and slapping new sneakers on it doesn't leak anymore.
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