Got an aisle master 20SE. The battery is in below average condition, however when sideshift is operated the pump motor operates at full speed. When tilt or lift are operated the pump is very slow, like it's still in steering only mode.
From what I can see the Motor speed is controlled by a pressure switch on the valve block, does this send a signal to the controller to tell the motor to speed up when it senses pressure? It is a DC lift, AC drive model.
I wouldn't have thought that would be faulty though as it seems to be working with sideshift. I'm tempted to think that the battery is cactus but voltage is not significantly dropping when lift is applied. It is dropping to to 42V when sideshift bottoms out though.
Thoughts?
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