The Zapi panel in the back.
Check BOTH traction & hydraulic motors, make sure the carbon brushes are all ok & also check all the wiring to the motors.
Also check the contactors in the back for dirty tips.
The traction motor can fill up with dirt / debris, these can be pressure washed out BUT you have to be careful!
Make sure battery is disconnected & stays disconnected until the motor has dried out ( we used to leave them for a few days in front of a heater ) & the resistance values are back in spec!
The hydraulic motor can fill up with dust but you can blow these out with an air line.
The Zapi panels on these DC machines don't last long if the battery is in poor condition.
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