Cub Cadet 2140 with low power


Old 09-08-09, 07:32 PM
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Join Date: Jul 2009
Posts: 6
Cub Cadet 2140 with low power

I have a Cub Cadet 2140 with hydrostat drive, the engine runs great but the drive has very little power. If you push the forward pedal all the way down the mower will move slowly but will not climb any incline. What would cause this? I am quite familiar with larger hydrostats, I'm a Bobcat mechanic, but these little guys confuse me. Does it have a charge pump? This seems like a charge pressure issue. Any help would be greatly appreciated.
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Old 09-08-09, 09:55 PM
cheese's Avatar
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Join Date: Jul 2001
Location: USA
Posts: 16,819
If the belt isn't slipping and the bypass valve is not engaged, then take a look at this info I found online and copy/pasted here:

The solution is to remove the frame cover (6 bolts) to get access to the top of the cluth assembly. The clutch assembly has a cover on on the top rear. If you remove this cover (3 bolts) you will see a bearing. The clearance between the outer race of this bearing and the cover (put straight edge against it shuold be 2/1000 - 7/1000. If it is not your clutch will slip. To fix it buy some $2 shims (washers). The part numbers are
736-3126 - Washer, flat, 1.25 x 1.8 x 0.005
736-3127 - Washer, flat, 1.25 x 1.8 x 0.010
736-3104 - Washer, flat, 1.25 x 1.8 x 0.015
736-3105 - Washer, flat, 1.25 x 1.8 x 0.020
736-3106 - Washer, flat, 1.25 x 1.8 x 0.025
736-3107 - Washer, flat, 1.25 x 1.8 x 0.062

Once you have these remove the bearing. Press on the forward pedal to help push it out and then pull it the of the way. I did this with a bent heavy paper clip. Insert the proper washers to get back within spec (2/1000 - 7/1000), insert the bearing and put the cover back on.
If the spacing is to small (< 2/1000) then the tractor may creep when idling in 1st gear. Other than that you shuold be in good shape!
Old 09-09-09, 09:14 AM
bontai Joe's Avatar
Join Date: Apr 2004
Location: Pennsylvania
Posts: 592
Also check that you don't have a key sheared off or missing in a drive pulley somewhere allowing friction to move you slowly if level or downhill, but slipping under any kind of load. I have seen a couple of times where the set screw holding the key fell out, then the key fell out leaving nothing to lock the sheave to the shaft.

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