Hi i am new to the forum and looking for someone to help with a issue i have. I have a case 1840 skid steer and i was driving along heard a faint whining noise and the machine slowed to a stop and will no longer go in forward or reverse. The loader does everything it should. The engine does not bog or have any effect when i try to move the drive levers. Fluid level is good. No whining or grinding noises. Is there a relief stuck or possibly a stripped coupler on the tandem pump? any help would be greatly appreciated!
I'd remove the seat and verify whether or not the tandem drive pump driveshaft is spinning. The loader hydraulic pump is at the rear of the machine, under the radiator. Different drive connection, hence looking at tandem drive pump driveshaft.
1845c loses drive after shutting off check out the above thread and see if it wont answer some of your ? and welcome to the forum
Is there a good way to determine if the driveshaft is spinning? its not visible.
The park pins are working as they should otherwise the engine would box while trying to move
My mistake...on my 1845C, the tandem drive pump has a short drive shaft between it and the bell housing. Yours is direct mounted. You'll have to slide the pump forward to inspect.
Thanks for the schematic!
Thanks for all your help, i was able to slide cab forward, slide pump forward and find that the pump coupler was bad due to the bolts falling out of the lower pump mount causing it to have movement. New pump coupler for $190 on its way!
Wonder how hard it will be to get that new coupler in? Do you have to disconnect all the hoses and linkage? If so take pictures if it's not too late for future reference. And thanks for posting what the problem was, too often someone will get an answer and then disappear so no one knows if it was the solution or not!
The linkages you will have to remove to get the cab forward. I supported the pump by using a ratchet strap and was able to slide it back just enough to get the coupler out without disconnecting any hoses. It’s tight but it can be done.
Here are a couple pic of the project
pump splines still good?
Yes those splines show no wear, must be a lot harder steel then the coupler.
Glad you have it fix! Now can I borrow it for a couple days?
I have the same issue on a Case 1840. I have the pump supported/out of the way, have taken off the nuts but have been unable to get the coupler off of the flywheel plate. Any suggestions?
You'll have to take out the plate, by removing the 4 #20 bolts in the parts diagram above, first.
It would be a good idea to check the pilot where the tandempumps enter the Bell housing cover, if that wore much from working back and forth loose you may have an alignment problem that could cause future coupler issues as well, It is hard to believe there was no damage with the coupler that worn. When assembling we always used a Molybdenum lubricant paste on the splines and coupler