sounds a little like my 922B i too would like to do a complete fluid change with filter so take some pics when you do it lol. sorry i can't be any help but let me know what oil you decide to go with.
you are building air right the trans need air to work right check for air leaks you air pump might be slow and just need to build up?
On the contrary, the air operated "neutralizer" valve is spring return to the drive position, so air pressure is not required for the transmission to operate.
If, after starting the engine, the loader will not move until the speed lever is pulled into 1 and 2 and does not push back forward to the neutral position, the safety valve is working properly.
There is a strainer in the bottom right corner of the trans/range selector sump. I don't have an operator's manual that details how it is to be checked, but it appears to be under a cover accessible from the rear held on by some small bolts. This appears to be the suction for all trans, loader and steering booster pump flow on the whole machine. It could be clogged with sludge.
The transmission oil filter should be changed at this time as well. I believe the CAT recommendation for oil would have been 10 wt motor oil, but a drive train oil should be substituted if possible. If you need to pick something up at the autoparts, there is a low viscosity universal tractor hydraulic fluid available. I have been running the regular viscosity "303" fluid in our 944 and 910 for years, but it doesn't get very cold here in winter.
Edit...I see Rusted replied while I was babysitting and typing in between looking in the books. Better info than my off the top of the head recommendations.
Hi Dan,
the Trans. suction screen has an angled oil pickup tube out from its outer case.
It is aligned by a pin that can get bent or break off. When this occurs the angled tube end can droop down and contact the floor of the Transfer Case, or if you like oil sump, and restrict the flow of Trans. oil to the high mounted Trans pump.
Be sure to orientate the tube so as to be held up from the case floor or you can experience your exact problem--many Cat machines of the day had this type oil pickup and suffered the same similar restricted oil problem.
Hope this helps.
Cheers,
Eddie B.
Hello
Simple check to carry out is to make sure there is no
air leakage via the left brake pedal ( transmission neutralize)
that could be partially effecting the gear box operation, ie
disconnect line.
Thanks for all the advice I have received from the various members so far, I have been told to check for any air leaks that might possibly affect the neutralizer function on the transmission. Last year I replaced both the left and right air brake foot valves and all of the copper air lines that correspond to the valves, I also dropped the rear counter weight so I could get at the rear mounted air tank and replaced all lines, fittings, and drain valves, so I'm pretty sure I have no air leaks. The only thing I have noticed since replacing all of the air lines, valves, and fittings is when my air pressure gauge reaches maximum pressure the needle on the gauge itself will kinda dance back and forth a little bit, whether that is an issue I'm not sure. As far as checking the trans suction screen and the oil pickup tube associated with it I have no idea where to even check for it, I have no manual and finding info on a mid 60's cat 922b wheel loader is proving to be almost impossible. If anyone could give me a reference or general idea where those parts are located I would certainly appreciate it. I also have a dash mounted trans converter temp gauge that is not working and am wondering if that should be a priority to have it replaced so I can monitor the converter temp, thanks again. Dan
Right side lower rear face of transfer case/range selector just below the suction line leading up to the pump stack
i was able to get bran new books for my 922b right from Cat i think it took about 6-8 weeks but i got new reprints. i sure JenSales out on MN will have something if you don't like the lead time from Cat. other option is too post a add in the buy and sell on what you are looking for with you # of your machine i sure you can get some used one floating around out there. take some pic's and keep us in the loop
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