Re: B7100 oil pressure problem and specs
Update on the low oil pressure problem:
I put the test gauge on the machine. At cold start up, the pressure read 52psi at high idle. I'm currently using 15w-40 oil. I cut the lawn using the 60" belly mower, ambient temp was 60F. Within the first 10-15 minutes, the oil pressure started to drop. Within 45-60 minutes the pressure dropped from 52psi down to 15psi at which time I shut the machine off. I let the machine cool for 4 hours at which time I replaced the oil filter(again) and checked the oil level which oddly read a high. Note, about 1 1/2 years ago I replaced the hydraulic pump because it was leaking hydraulic oil into the crankcase. I was surprised to see the oil level high by about 1 quart because when I changed the oil I used the exact prescribed amount. I drained the excess oil and started the tractor. Same situation, started at 50+psi and dropped to 15-20 psi after about an hour of mowing. Question, do you thing the hydraulice pump failure and the oil it dumped into the crankcase could have caused any damage. To the best og my knowledge, the tractor was run for maybe 5 hours with the hydraulic oil in the crankcase.
Nest steps: I plan to replace the relief valve assembly located below the oil filter housing. Does anyone have any tips on accessing this part. Looks like it's hidden behind the frame rail. I think I've read that some guys drill a hole in the frame rail to access. Is this the best method? If so, does anyone have the measurements for hole placement?
What else: If the relief valve does not fixt it, I plan to check the plug in the camshaft. Any tips or suggestions for this task? Is there anything else I should check at this point?
Thanks for the help!