The motor runs but the cable does not pull the lever, what is the reason?
If the motor turns, the electrical side is sound; the problem is mechanical. The most frequent causes are the cable having slipped or been loosely fixed in the kit's socket, the movement resistance of the lever exceeding the kit's pulling force (10 kg for the LFT20, 15 kg for the LFT54), and friction created by sharp bends along the cable route.
Check in this order:
- Cable connection: Confirm that the outer end of the cable is fixed tightly and cannot slip in the kit's cable entry socket. Slipping is the most common cause.
- Cable length: If it is slacker than necessary, the whole pull distance (60 mm on the LFT20, 50 mm on the LFT54) is spent taking up the slack and no movement reaches the lever.
- Mechanical resistance: Disconnect the kit and pull the lever by hand. If it moves with difficulty even by hand, grease the joints and clean off rust and mud. If the resistance exceeds the kit's force limit, no adjustment will help.
- Route: If the cable passes through sharp bends or a jammed guide, friction absorbs a significant part of the force. Lay the route as straight as possible.
- Cable condition: Strands that have started to break, a crushed sheath and water frozen inside all obstruct movement.
The cable does not come with the kit; on both models the tractor's existing cable is used. If the cable is worn, renew it first. If the problem continues after the mechanism has been freed up, it may be necessary to move to a model with a higher pulling force.
The full topic: Converting a tractor hydraulic lever to electronic control