Re: Slow hydraulics

Slow response to hydraulic system is most likely caused by worn or broken parts. The first place to check is after removing the hold position valve on top of the pump. You will see four 3/4 plugs these are the discharge check valves. Remove the plugs and look for broken springs. If this is not the problem you will need to remove the pump, when removing the pump it is best to remove the PTO shift lever and take it out the bottom, when reinstalling insert it from the top. If you remove the pump you will see it is a cam driven 4 plunger pump 3-11/16 and 1-5/16 is for traction boost .
check for: stuck plungers, broken return spring, rollers and pins worn.
This is caused by running low on oil.

I hope this will help you out. If you have further questions e-mail me at Ref: WD Hyd Pump--- there are 3 adjustments on the pump 1. top block hold position valve, this is where your hyd. .lines connect to the rams connect to, and is bolted to the top of the pump body with two 5/16 bolts. The nurled adjustment knob on the front should be turned out all the way untill it hits on the end check valve plug. 2. the knurled adjustment screw for the control valves on end of pump dell@ala.nu.
Don -Retired AC mechanic