DonRina
Bronze Member
Ok, second post for the other brake unit. I thought this would go slick as I now knew what to look for.
Removed the cover plate expecting the same condition as the other side but no it was a disaster. The inside looked completely filled up with crud. This was oily with maybe dirt and rust bits, not good. It was so bad I had to remove the crud before I could remove any of the parts.
Finally wriggled out the drake disc and pressure plates and remaining disc. The disc didn’t have a lot of wear but was oily. The pressure plate was quite rusty. When I removed the springs two were basically rusted out. The ball bearings were all corroded and the ramps too corroded to use. This was a real mess!
The brake shaft had a lot of corrosion as well so I cleaned that out. Overall, this side had obvious water, dirt and oil intrusion.
The actuating mechanism on the outside of the unit was, however, in great shape! I never could find any source for the dirt intrusion so my theory is one of the two 10mm bolts must have been open at some point and crud got in. The rubber cap seemed ok but that could have been it too I guess.
New parts will need to be obtained for this repair. I had the brake discs and seals plus o rings but wasn’t expecting new pressure plates etc to be required.
So the lesson is to somehow get your cover plates off before attempting this repair to see exactly what the heck is going on. Wouldn’t have saved me any cash but some time I guess.
Some ugly part pictures attached.
Update to this the rubber cap was indeed cracked enough to let in crud so most likely was the culprit.
Parts ordered from my “local” Jinma dealer on the west coast.
Removed the cover plate expecting the same condition as the other side but no it was a disaster. The inside looked completely filled up with crud. This was oily with maybe dirt and rust bits, not good. It was so bad I had to remove the crud before I could remove any of the parts.
Finally wriggled out the drake disc and pressure plates and remaining disc. The disc didn’t have a lot of wear but was oily. The pressure plate was quite rusty. When I removed the springs two were basically rusted out. The ball bearings were all corroded and the ramps too corroded to use. This was a real mess!
The brake shaft had a lot of corrosion as well so I cleaned that out. Overall, this side had obvious water, dirt and oil intrusion.
The actuating mechanism on the outside of the unit was, however, in great shape! I never could find any source for the dirt intrusion so my theory is one of the two 10mm bolts must have been open at some point and crud got in. The rubber cap seemed ok but that could have been it too I guess.
New parts will need to be obtained for this repair. I had the brake discs and seals plus o rings but wasn’t expecting new pressure plates etc to be required.
So the lesson is to somehow get your cover plates off before attempting this repair to see exactly what the heck is going on. Wouldn’t have saved me any cash but some time I guess.
Some ugly part pictures attached.
Update to this the rubber cap was indeed cracked enough to let in crud so most likely was the culprit.
Parts ordered from my “local” Jinma dealer on the west coast.
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