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955H SN60A2990 Brake Lining Replacement Questions

955H SN60A2990 Brake Lining Replacement Questions

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ekasl
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Hi Guys,
How difficult is it to remove and replace the brake lining group (p/n 9H4280) on a 955H? I removed the seat, fuel tank, floor plates, and inspection covers. It appears that the linings on the left side are disenegrating and I suspect that's why the machine will not turn to the left. The right side lining looks okay and steers fine.

The service manual says the brake lining areas should be drained often (i.e. every 60 hours or so) and to my knowledge my father in law (previous owner) had never done this. So I removed the drain plugs per the service manual instructions and removed almost 15 gals (30 wt oil + a little muddy grunge) total from both sides. I think the lining areas are supposed to be dry based on what the service manual says so it seems like I should probably replace the linings on both sides since they've been submerged in oil for a long, long time.

My parts books indicates that 12 linings (p/n 5H6030) and 96 rivets (p/n 7B5054). Are any special tools required for removal or installation of the linings or lining assemblies? Seems like a cable or wire of some sort might help reinstallation. Please provide a procedure if possible.

Thanks
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Sun, Aug 15, 2010 11:11 AM
rusted
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The later 60A series were wet clutches/brakes..I suspect you have one given the amount of oil you drained out of it; also it would be highly unlikely the brakes would have worked on either side if they were dry type given the amount of oil in there.
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Sun, Aug 15, 2010 1:29 PM
gemdozer
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Reply to rusted:
The later 60A series were wet clutches/brakes..I suspect you have one given the amount of oil you drained out of it; also it would be highly unlikely the brakes would have worked on either side if they were dry type given the amount of oil in there.
The 955h has wet stering cluch and brake and you need to pull out the bevel gear shaft assambly with stering cluch for changing the brake (big job)
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Sun, Aug 15, 2010 5:49 PM
Old Magnet
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Reply to gemdozer:
The 955h has wet stering cluch and brake and you need to pull out the bevel gear shaft assambly with stering cluch for changing the brake (big job)
Early 60A models are dry steering clutches and brakes. Change to wet deck occurred at serial #3626.
Dry brake bands can be removed using the access covers at the back of the case. Not all units had the lower covers and the service manual gives instructions on where these openings should be cut. The process is remove the top access covers, bottom support screw and brake anchor then the brake band sections using the access holes and rotating the band sections and brake band.
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Sun, Aug 15, 2010 11:06 PM
gemdozer
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Reply to Old Magnet:
Early 60A models are dry steering clutches and brakes. Change to wet deck occurred at serial #3626.
Dry brake bands can be removed using the access covers at the back of the case. Not all units had the lower covers and the service manual gives instructions on where these openings should be cut. The process is remove the top access covers, bottom support screw and brake anchor then the brake band sections using the access holes and rotating the band sections and brake band.
I make a mistake and OLD MAGNET is correct the 955 serie 60a are dry brake 1 to 3625
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Mon, Aug 16, 2010 12:33 AM
ekasl
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Reply to gemdozer:
I make a mistake and OLD MAGNET is correct the 955 serie 60a are dry brake 1 to 3625
Thank you Old Magnet, Gemdozer, and Rusted for your comments.

My 955H does have the lower access covers to remove the brake linings. The service manual does mention up through SN3625 is dry and says that oil can seep into the case area around the lining areas and needs to be routinely drained out via a couple of threaded plugs on each side.

One item that still puzzles me is the lower left access cover. The cover has a dip stick receptacle (with a missing dipstick) on the outside and two side-by-side mounted to it on the inside. The filters have Cat part nos. and are about 1" diameter and 6-7" long.

Close inspection of the receptable indicates that the weld is not painted Cat yellow and was probably welded to the access cover by someone. My parts book and service manual do not mention this dipstick receptacle or filters.

Does this ring a bell with anyone?
Is it possible that the Cat was retrofitted for some reason and I should be looking to purchase a dipstick for this?
Perhaps it serves some sort of venting purpose?
Perhaps someone did this to make checking the oil easier?

Thanks again guys.
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Mon, Aug 16, 2010 2:10 AM
ekasl
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Reply to ekasl:
Thank you Old Magnet, Gemdozer, and Rusted for your comments.

My 955H does have the lower access covers to remove the brake linings. The service manual does mention up through SN3625 is dry and says that oil can seep into the case area around the lining areas and needs to be routinely drained out via a couple of threaded plugs on each side.

One item that still puzzles me is the lower left access cover. The cover has a dip stick receptacle (with a missing dipstick) on the outside and two side-by-side mounted to it on the inside. The filters have Cat part nos. and are about 1" diameter and 6-7" long.

Close inspection of the receptable indicates that the weld is not painted Cat yellow and was probably welded to the access cover by someone. My parts book and service manual do not mention this dipstick receptacle or filters.

Does this ring a bell with anyone?
Is it possible that the Cat was retrofitted for some reason and I should be looking to purchase a dipstick for this?
Perhaps it serves some sort of venting purpose?
Perhaps someone did this to make checking the oil easier?

Thanks again guys.
Should say with two side by side mounted FILTERS
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Mon, Aug 16, 2010 2:12 AM
Old Magnet
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Reply to ekasl:
Should say with two side by side mounted FILTERS
Just to be sure we are on the same page....there would be four access holes/covers visible at the back end, two in the main case cover and two in the main case itself.

Don't know what that may be mounted on the cover. The parts books do not show anything mounted all the way through 60A production.

Are there any lines or hoses involved as if someone tried to add a lube system or booster for the clutches....otherwise you would not want to be putting oil in those normally dry compartments. Could be some type of vent system???
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Mon, Aug 16, 2010 3:59 AM
gemdozer
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Reply to ekasl:
Should say with two side by side mounted FILTERS
If you removed 15 gals. oil each side you should have the wet brake
and stering cluch and you must have a bad serie number and the dry cluch should not have a dipstick and a photo could help
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Mon, Aug 16, 2010 4:13 AM
Old Magnet
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Reply to gemdozer:
If you removed 15 gals. oil each side you should have the wet brake
and stering cluch and you must have a bad serie number and the dry cluch should not have a dipstick and a photo could help
Have a look in there...the wet brake has no segments. the dry brake does.
Wouldn't be the first time someone tried to make an "okie" wet system out of a dry system!!!!!
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Mon, Aug 16, 2010 4:42 AM
ekasl
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Reply to Old Magnet:
Have a look in there...the wet brake has no segments. the dry brake does.
Wouldn't be the first time someone tried to make an "okie" wet system out of a dry system!!!!!
Hi Guys,
I will post some photos of everything within a day or two. I may have the current lining out by Saturday. If I understand you correctly, there is a good possibility that someone has tried to convert this to a wet system and as such I'd expect to see a 'newer' style lining (consistent with higher SNs).

In your experience, does the 'Okie Style' work? If so, how much oil and what type should be used to fill this area.

If the Okie Style should be removed....just let me know and I'll attempt to restore everything to factory specs.

Thanks again.
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Thu, Aug 19, 2010 8:43 PM
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