Gener
Member
I posted a short question recently but didn't get a response so I will try a longer version of it.
Cat 287B. S/N AZSA03121. Machine has about 2000 hours on it.
The relief valves on the piston pump were leaking so my hired man changed the o-rings on two of them. There are four total. These are the 1 1-4" hex heads on the side of the piston pump. He cleaned up the machine and did some other minor maintenance at the same time. Shortly after the track motors nearly locked up. The tracks still turn but with a lot of resistance. The arms raise and lower normally.
My guess is that we messed something up replacing the relief valves. I took all of them out and checked them. There are heavy spring mechanisms with a light spring underneath. I did notice that the upper front has a smaller inner spring than the others. I don't know the proper service procedure is on these so it would be great if someone could provide that. I can't seem to "release" the track motors. Is there a way to relieve the pressure?
If there is any other insight anyone can provide I would appreciate it. Basic info on how the system works, etc. Also, could there be anything that happened coincidentally that is common with the track motors not wanting to turn?
If I can't come up with anything I suppose CAT service is next but I thought I'd try here again.
Cat 287B. S/N AZSA03121. Machine has about 2000 hours on it.
The relief valves on the piston pump were leaking so my hired man changed the o-rings on two of them. There are four total. These are the 1 1-4" hex heads on the side of the piston pump. He cleaned up the machine and did some other minor maintenance at the same time. Shortly after the track motors nearly locked up. The tracks still turn but with a lot of resistance. The arms raise and lower normally.
My guess is that we messed something up replacing the relief valves. I took all of them out and checked them. There are heavy spring mechanisms with a light spring underneath. I did notice that the upper front has a smaller inner spring than the others. I don't know the proper service procedure is on these so it would be great if someone could provide that. I can't seem to "release" the track motors. Is there a way to relieve the pressure?
If there is any other insight anyone can provide I would appreciate it. Basic info on how the system works, etc. Also, could there be anything that happened coincidentally that is common with the track motors not wanting to turn?
If I can't come up with anything I suppose CAT service is next but I thought I'd try here again.
