Jim thats a lock valve,it protects against dropping the load(people bucket)in case of hose or system failure. Unscrew the lock spool(left in photo)and check it for trash or contaiminates..sometimes they get hung up.I had one on a forklift that drove me crazy..speaking of slow progress its so wet and muddy here Im shut down for a while till it all freezes..IF it does..can't do much until I can mobilize over the mud..my small articulated loader fork is still broken down, can't get it to the shop to work on it cause of the mud..aggravating! Best of luck with your recovery
