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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Case 1845 Skidsteer Cessna pump mounting

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Dave in OR

06-16-2006 19:31:40




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I gave the 188 Diesel a major rebuild and it runs great. Now that it's running, I have problems moving. Moves very slow. Lots of slop in the forward and reverse hand control rods and linkage. I can adjust much of this out, but I found the tandem pump ears were previously broken where the pump mounts to the bulkhead. These were welded and one side is broken again so that when I reverse the left control rod, the tandem pump assembly moves back away from the bulkhead about 1/8 inch on the left side. Apparently, the whole pump assembly is held up an on to the bulkhead with just two mounting bolts? Has anyone solved a problem like this by creating a heavy duty mount - turnbuckle/rod setup or something to hold the pump to the bulkhead? I do not have any leaks from the pumps and if I can adjust the linkage and make a mount to hold this pump assembly tight against the bulkhead, maybe I can get this machine to move a little quicker? Or am I trying to resurrect a dead horse? -p.s.- The bucket pump works fine. The charge pressure sender is missing from the junction block and a plug is in its place. I do not have a manual for this- just a parts book.

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JCSinGA

06-17-2006 15:33:53




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 Re: Case 1845 Skidsteer Cessna pump mounting in reply to Dave in OR, 06-16-2006 19:31:40  
I had the drive pumps out of an 1845C a while back but it had the Cummins engine. However I would assume the pump mounting to be similar. The C model had the 2 ear mounting pad but also had a brace that was bolted to the bottom of the bellhousing and extended the length of the pumps and bolted at the back of the pumps to give some support there. It's alot to ask of two 1/2" bolts to hold up probably over 100lbs. of pumps without this extra support.
While all this needs to be on the machine and bolted up tight it's not going to cause slow drive. However if you have enough slop/motion/movement to not allow the pump lever to fully stroke both ways then this will cause slow drive.

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Dave in OR

06-18-2006 20:18:31




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 Re: Case 1845 Skidsteer Cessna pump mounting in reply to JCSinGA, 06-17-2006 15:33:53  
Well, JCS, I might have spoken too soon. I don't know how I missed it, but there is a support under the pump assembly on the 1845. It is a vertical steel plate underneath and btwn the tandem pump assembly and the third (bucket) pump. I adjusted the play out of the linkage; seems to help the drive somewhat but it is still slow in reverse. Does anyone know how to pressure test each of the tandem pumps? Where to hook up a gauge? And what should the pressure range be? This unit has 7300 hours. -Thanks

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JCSinGA

06-20-2006 11:16:16




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 Re: Case 1845 Skidsteer Cessna pump mounting in reply to Dave in OR, 06-18-2006 20:18:31  
If your certain the pump lever is moving the full travel it should then you should do a pressure check on the pumps.
The way I do it is to put the machine up on jackstands (tires off the floor) make sure it's stable and not acting like it wants to fall off the stands.
You'll need at least a 6000 psi gauge with a high psi capacity hose and a fitting(s) to adapt to the size of the large hoses coming from the pump going to the motor. Remove 1 hose from the pump, put the gauge fitting directly on the pump where hose was removed (deadhead). Start engine find which control gets pressure on the gauge, raise rpm's a little (less than half throttle tho) stroke the lever and read pressure. You will have to look fast if the pump is in good shape it will probably want to stall the engine.
I would look for pressure in the 4500-5000 psi range.
If you dont understand what I've talked about here then please get someone to do it for you this can be a dangerous procedure.

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Troy Perry

02-28-2007 17:54:33




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 Re: Case 1845 in reply to JCSinGA, 06-20-2006 11:16:16  
I am looking for all the info I can get on a Case 1845 Uniloader, especially the hydraulics. i bought a 1985 but some of the systems were messed up by previuos owner.



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