DIPPERSTICK CYLINDER FOR 615 KEEPS BLOWING TOP OFF

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   HELLO ALL,   I HAVE A 615 BACKHOE THAT STARTED BLOWING THE TOP OFF THE DIPPERSTICK CYLINDER, I IMAGINE THE THREADS ON THE INSIDE OF THE CAP HAVE GOTTEN PRETTY THIN AFTER THE 4TH TIME IN A WEEK. ANYBODY HAVE A SUGGESTION FOR A REPAIR, OR DOES ANYBODY HAVE AN OLD 615 THEY ARE PARTING OUT?
ANY HELP IS APPRECIATED, THANK YOU.

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Dezeldog Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 03 Jun 2017 Location: Oregon Points: 2	Post Options Post Reply Quote Dezeldog Report Post Thanks(0) Quote Reply Topic: DIPPERSTICK CYLINDER FOR 615 KEEPS BLOWING TOP OFF Posted: 06 Jun 2017 at 11:00am
	HELLO ALL, I HAVE A 615 BACKHOE THAT STARTED BLOWING THE TOP OFF THE DIPPERSTICK CYLINDER, I IMAGINE THE THREADS ON THE INSIDE OF THE CAP HAVE GOTTEN PRETTY THIN AFTER THE 4TH TIME IN A WEEK. ANYBODY HAVE A SUGGESTION FOR A REPAIR, OR DOES ANYBODY HAVE AN OLD 615 THEY ARE PARTING OUT? ANY HELP IS APPRECIATED, THANK YOU.

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Dozer Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 16 Aug 2011 Location: SW New York Points: 689	Post Options Post Reply Quote Dozer Report Post Thanks(0) Quote Reply Posted: 06 Jun 2017 at 4:56pm
	You will likely need to replace the cylinder. For a good repair take the complete cylinder to a hydraulic repair shop. I have had cylinders rebuilt for about $700 If you are trying to get by put it back together and tack weld it knowing that when anything else happens your cylinder is junk.

DiyDave Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 11 Sep 2009 Location: Gambrills, MD Points: 50509	Post Options Post Reply Quote DiyDave Report Post Thanks(0) Quote Reply Posted: 06 Jun 2017 at 6:30pm
	Also check the system relief valve, to make sure it isn't stuck shut...

Coke-in-MN Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Afton MN Points: 41185	Post Options Post Reply Quote Coke-in-MN Report Post Thanks(0) Quote Reply Posted: 07 Jun 2017 at 9:20am
	The cast ring that holds the gland has worn along with the threads on the steel barrel . For a quick repair to finish a job - I ground about 1/4" off the barrel this allowed the cast ring to grab new threads - Still working and further repair not needed yet. My next fix was going to be a plate over the ring with hole for shaft - then threaded rod back to clamp around barrel - kind of like tire rods . As that outside ring only retains the packing gland and seals it does not function to do anything but hold that gland - A couple spot welds of say 1/4 bead a couple places can help also if rest of areas are good . The cylinders used on AC 715 hoe are the same size and lengths but the 715 uses a smaller rod diameter on those cylinders . In fact i have one cylinder from my 615 on the 715 now Edited by Coke-in-MN - 07 Jun 2017 at 9:23am
	Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something. "Challenges are what make life interesting; overcoming them is what makes life meaningful."

LeonR2013 Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 01 Jan 2013 Location: Fulton, Mo Points: 3500	Post Options Post Reply Quote LeonR2013 Report Post Thanks(0) Quote Reply Posted: 10 Jun 2017 at 12:00am
	Coke I had the same problem as you with the cylinder so I capped it and welded a piece of small pipe to the barrel and drilled and tapped the plate over the end. If it starts weeping just snug the bolts a little. When I welded the small pipes to the barrel it did shrink the barrel a bit at the weld so had to work that out.