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TB135 Drive motor not shifting

elkjunkie

elkjunkie

Well-Known Member
Joined
Aug 7, 2018
Messages
45
Location
Washington
This machine has excellent rabbit speed on one track and none on the other. works fine in turtle. I loosened the shift port hose on the motor and got charged flow when I depressed the rabbit button. Do I need to pull the drive? there does not seem to be a removable plate on the back of this motor for the 2-speed circuit. There are some hex screws that I havent messed with.
Thanks.
 
elkjunkie

elkjunkie

Well-Known Member
Joined
Aug 7, 2018
Messages
45
Location
Washington
Thanks guys- I have searched and read threads on this issue wich lead me to check case drain. Rondig mentioned some pressure testing although I still need to identify ports, plugs, and relief valves. TCM brought up the drive motor swashplate wich I need to investigate further. As it turned out I checked the supply for the 2 speed shift instead of case drain. It would seem my problem is in the motor judging from my 2 speed shift flow increase to the motor in question; and the fact that it seems to run fine in low speed.
 
elkjunkie

elkjunkie

Well-Known Member
Joined
Aug 7, 2018
Messages
45
Location
Washington
So I pulled the motor. I'm guessing the large plugs are reliefs. I can split the motor removing seven bolts but there are multiple plugs I wanted to ID first. So far I think the ports are:
Red- 2 speed shift
White- case drain
Black- drive flow20180823_185726.jpg
 
elkjunkie

elkjunkie

Well-Known Member
Joined
Aug 7, 2018
Messages
45
Location
Washington
20180824_184951.jpg 20180824_185338.jpg well the motor is apart. The shift port will not clear under pressure or vacuum. I think the the shift actuator is in the bottom right of pic 2 between the 2 small ports. The center is rough, perhaps some extension broke off?
 
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