We've discussed several times about slides moving out a bit, but never at full travel, so I don't know what's going on with your unit. Generally if the slides creep out a few inches, either a cylinder piston seal is shot or the integral check valve in your pump is bad. If it is narrowed down to the pump ...I think the pumps on your model are obsolete by now. If you have air in the system ... cycle the slides in and out 3-4 times and the system will self bleed.
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