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Old 09-06-2019, 07:46 PM   #1
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Lube Rear Slack Adjusters

'04 HR Ambassador/Monaco Knight, 4 bag chassis. Front slack adjusters are super easy by turning the wheel, rears are a monster. The shaft rotates CC with the zerk positioned at the 11 o'clock position [rotates toward the rear axle housing when the brakes are released]. For some reason, Eaton used a 90 degree zerk pointed toward the rear axle hub. I haven't found any way to get a grease gun onto the zerk because of interference with the drive axle housing. Thought of replacing the zerk with a straight one which would solve the problem, but this is some 11MM (base) monstrosity installed by Hercules himself, last thing I want to do is twist it off in the housing.
I must be missing something -- open to suggestions.
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Old 09-06-2019, 08:22 PM   #2
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I tried to change my zerk only to find they are pressed in, not screwed.
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Old 09-06-2019, 09:00 PM   #3
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I've never seen any pressed in. The ones in the u-joint are screwed in.
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Old 09-07-2019, 04:00 AM   #4
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Quote:
Originally Posted by tomclayton1 View Post
For some reason, Eaton used a 90 degree zerk pointed toward the rear axle hub. I haven't found any way to get a grease gun onto the zerk because of interference with the drive axle housing. Thought of replacing the zerk with a straight one which would solve the problem, but this is some 11MM (base) monstrosity installed by Hercules himself, last thing I want to do is twist it off in the housing.
I must be missing something -- open to suggestions.
You should be able to put a wrench on the fitting and turn it so it points in way you can get the grease gun on it. Usually the zerk fitting takes a 5/16" wrench size or a 3/8" wrench size.
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Old 09-09-2019, 10:22 AM   #5
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There is a grease gun tip on Amazon that I want to try .
It slides on so it is flat and should fit in those tight places .
Ray

https://www.amazon.com/Dr-Lube-Degre...ateway&sr=8-53
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Old 09-09-2019, 11:12 AM   #6
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There is a grease gun tip on Amazon that I want to try .
It slides on so it is flat and should fit in those tight places .
Ray

https://www.amazon.com/Dr-Lube-Degre...ateway&sr=8-53
That design (left in photo) does not too promising to me. Looks like a lot of grease will pour out around the fitting (usually the grease adapter has a "spring loaded tip" that fits tight over the grease fitting.

Maybe the one on the right in the photo will fit. If not you just need to replace the grease fitting with the proper one and angle it so you can get on it.
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Old 09-10-2019, 07:47 AM   #7
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Thanks guys, I've ordered the 90 degree one instead of the slotted one. If it every stops raining here in northern MN, I'll give it a try.
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Old 09-10-2019, 08:21 AM   #8
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Quote:
Originally Posted by CountryB View Post
That design (left in photo) does not too promising to me. Looks like a lot of grease will pour out around the fitting (usually the grease adapter has a "spring loaded tip" that fits tight over the grease fitting.

Maybe the one on the right in the photo will fit. If not you just need to replace the grease fitting with the proper one and angle it so you can get on it.
I wondered about how the grease will not leak out the end too .
Surely it has some way to seal when in use .
I am still tempted to order one so I can see if it will work in some
tight places I have .
The other one does look more promising but still may be to big for
my needs .

Ray
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Old 09-11-2019, 10:30 AM   #9
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Those low profile 90* tips acctually DO work, but if it comes with a warning 'only for use with hand grease guns', heed the warning.
I destroyed mine in less than 5 min with my air powered gun !
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Old 09-11-2019, 10:45 AM   #10
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Quote:
Originally Posted by 96 Wideglide View Post
Those low profile 90* tips acctually DO work, but if it comes with a warning 'only for use with hand grease guns', heed the warning.
I destroyed mine in less than 5 min with my air powered gun !
Ben , Are you referring to the flat tip or the other one ?
The other one looks very much like a regular tip except at a 90deg
and stands up quite a ways .
Ray
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Old 09-11-2019, 12:05 PM   #11
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The flat one. Work good for greasing zirk's with little clearance.
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Old 09-11-2019, 01:09 PM   #12
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Quote:
Originally Posted by 96 Wideglide View Post
The flat one. Work good for greasing zirk's with little clearance.
Great , thanks , I'll order one .

Ray
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