Posted by Kurt-NEPA on March 19, 2012 at 11:55:40 from (97.166.13.243):
In Reply to: Ford 600 hydraulics posted by BobW on February 29, 2012 at 10:32:52:
At least the cam follower pin is OK. The unloader valve comes out from the opposite end of the cylinder from that shown on your picture. You should see a plate with 3 bolts there. Remove the bolts slowly, there is a spring under it that works with the control valve. Next to the spring you will see the plug JMOR talked about. Its about 1-1/8" diameter with a threaded hole. I think JMOR is right about it being tapped 1/2-20 - that's a fine thread. You will need to get a bolt that fits it, about 1-1/2 to 2" long. Also get a fist full of 1/2" flat washers. Beg, borrow, or acquire a piece of steel plate and drill a 1/2" hole in it. Put the bolt thought the hole in the plate and then into the plug. Put some washers under the plate to support it. Then tighten the bolt. It will pull the plug out. You'll have to repeat that several times adding washers each time.
Once the plug is out you can push the unloader valve out from the other end with a small roll. If its stuck, you found your problem. It should move easily. Clean everything up and put on new O-ring. Don't use abrasives. Oil it up and reinstall. You can tap in the plug with a hammer, just be gentle.
Make sure you used the correct O-ring on the unloader valve. Don't guess. I get mine from CHN
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