Hi, I am trying to figure out what I think is an electrical problem with a Tak TL120 rubber tracked skid loader with 2700 hrs. After running the machine 20-30 minutes, I begin to hear loud "clunks" in the drive train, and the machine will jerk like the parking pins are trying to engage with the lap bar down. About that time, both sticks go dead. The engine continues to run smoothly. Cycling power, or the lap bar, will sometimes get the sticks back momentarily, sometimes not. Shutting the engine down and letting it sit has worked to get it moving so far, until it warms up and the cycle starts over again. I pulled the relay panel out from in front of my feet and located the lap bar relay. I swapped it with the relay beside it, same problem. I read in this forum about cold solder joints on the larger relays, so I pulled them apart and re-tinned all leads on the circuit boards, same problem. The lap bar triggers a magnetic prox switch. Cycling the lap bar activates the relay. When the problem starts, I can hear the lap bar relay pulling in and dropping out quickly chattering. I am trying to trace the prox switch cable to where it terminates, but am getting lost. I don't have a wiring diagram. I suspect the prox switch is somehow getting hot and failing. My next step is to jump around the prox switch to eliminate it from the circuit.
This is my first post, and appreciate any help anyone might offer. I am a hobby mechanic with limited equipment experience, but enjoy learning and always enjoy the victory of successful repairs. Thank you.
This is my first post, and appreciate any help anyone might offer. I am a hobby mechanic with limited equipment experience, but enjoy learning and always enjoy the victory of successful repairs. Thank you.