I'm wondering if the community can point us in the right direction troubleshooting a Hyster E65 lift truck. Production will drop the truck off citing that the tilt and shift operation does not work. We verify this by trying to quickly engage the tilt or shift. The pump kicks in but we get no movement. However, if we very carefully work the tilt or shift the situation will eventually correct itself. We can't understand why it works sometimes, sometimes doesn't. The pump is kicking in...just no movement. Play with it a bit...it corrects itself. A very agitating intermittent situation. Any ideas???