I think the trans pump may be going out in my old yale G83P. It's squealing when I crank it up, lift wont move until the squeaking/squealing stops. Cheapest I have found is $900 for a hydraulic pump no bigger than my fist and the forklift is barely worth 3x that. Would it be possible to use another brand of pump as long as it's the correct gpm and I can get it to fit? The pump is a YT5067666-01 but I have not been able to find the gpm or any other specs on it. The lift is 5k capacity if that helps any. Thanks !