That machine may be really difficult to get parts for, my reference docs do not mention it at all.

Call Tom Smith @ ForkliftPartsWorld dot com in Little Rock, Arkansas. ph 501-366-1640 during business hours CST. He sells aftermarket parts for lifts, was a service manager for Toyota heavy equipment for about 40 years, knows these old machines better than anyone and will give you the low-down on your machine. I am doing a head job on my old Toyota lift, Tom helped me out a LOT with advice and parts.