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Michigan power shovel power steering filter

J

john *.?-!.* cub owner

Well-known Member
My neighbor has an old Power shovel he uses to load gravel for his road, move big bales, etc. He called me today, his steering had gotten hard to turn. He is VERY negligent regarding preventative maintenance, and I told him to check the power steering filter. He didn't know where it was, so I went down to help him find it, and followed the lines back to a large canister beside the Hydrualic lift tank. The steering and lift cylinders have a common reservoir, but different filters and pumps. I have no idea how old the filter was, but it was a Fleetguard filter, and the filter element had deteriorated to a fuzz like material that had plugged the small holes in the outer shell. It had even blown part of the outer shell out. I wonder if that missing part of the shell and the fuzz is in the valves of the steering system.
 
Deteriorated paper is likely the cause of grief. If the fluid is good (unlikely) it could be filtered and reused, but Flushing the system will be the first step. Jim
 
I agree, but knowing the owner he won't unless it becomes an absolute necessity. Of course, considering the plumbing and valves involved since the reservoir is also shared by the loader hydraulics, it is going to be a challenge. Thank goodness the hydrostatic drive has a separate system.
 
Is he too cheap to change the filter again after a couple of hours (or maybe less) use?
 
I told him to get 2 filters for the steering and also 2 for the hydraulics since they both use a common reservoir, but he does not believe machinery should ever get any preventive maintenance, so he will probably buy one of each and let it go at that.
 
Update, Jeff got another filter and fired it up with no noticeable improvement. It is a 4wd, 4wheel steer system with 2 steering cylinders on the front, and 2 more on the rear. When you use the bucket to rase the front off the ground and engage the 4 wheel steer, all the wheels steer as they should, but the front ones do not respond as quick as the rear, even though they are off the ground. When you let the front down and raise the bucket so there is some weight on the front it cannot be steered unless it is moving. He said they had the packing replaced on the front cylinders due to leaking about 3 years or so ago, but I do not know if they did anything else. I am suspecting one of the front cylinders may be leaking past the piston internally, and it only has one cylinder assisting the steering on the front, and I tole him to try capping off the lines to the front cylinders one at a time and see if it made any difference.
 
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