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Hi All ! I own an older GMC PD-4108A that I have parked up here in Maine since I drove it North from Fla a decade ago I try to run it around the field a few times a year and was planning on minor overhaul and drive it to Fla this fall But no matter how hard I try to get it into gear it will not budge --- almost like the Park brakes will not release after sitting up for the winter - -- - -some shaking in first gear but do not want to blow the engine or clutch -- --Could it be in the hydraulics ???
Most likely the brakes are rusted to the drums -or- the brake fluid has absorbed water "which it all does" or the flex hoses have collapsed and holding pressure,try some of the bleeders--be careful NOT to break them off,to release off the pressure-
rich
I'm having the same problem with my rig right now.
I found out that the Hydraulic Park Break system on it ("It's a crap system" words from the truck repair technician) sets a lock on the transmission hub to lock the motorhome from moving. I had to crawl under my rig and cut 1 piece off near the transmission to relase the hub lock with a sawz-all. I drove it yesterday to the local truck repair place once I got the hub to release. It will cost $105.00 to re-adjust the tension on the manual release and the valves being overhauled.
I would check on the rust issue before going to this lenth however. At times the most simple is the fix it needs. Start at the simplest and go from there.
I had a problem with the motorhome b4 with the charging system. I removed the alternator and had it rebuilt. come to find out it was just a ground wire from the alternator to the frame and rusted off. I could had cut the wire stripped it put a new connector on myself and reattached to the frame for.65 cents and 10 minutes intstead of 1 1/2 hours and $114.00 later.
My 1974 grumman was like that it was the cable for the parking brake oil up the parking brake cable try to get it to release then take wheel off and hit all the way around with a heavy sledge type hammer and it will break free mine did.
email Ed Hammond
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