We have Kalmar AC P50BXPS 584044A (2006?). This machine has a K21 or K25 nissan motor, its a newer truck.

The problem we have is; when lifting (its a triple stage) the full free lift cylinder 4 or 5 feet a number of times, the secondary inner channel hoist cylinders also begin to push up the channels during free lift.

If I extend the mast fully up and bottom out the lift height, then drop the forks to the floor, the FFL cylinder works fine for a time. Before I repack the FFL cylinder is there something else to look at.

This machine is a Komatsu with red paint, can anyone provide me w/ a komatsu model and serial #

Thanks for any assistance,
The Spartan Warrior