bobbd Posted April 15, 2010 Share Posted April 15, 2010 Hello again, I have got a H14 superwinch (hydraulic off PTO pump) off a utility vehicle and it works fine and I was told by superwinch it should shift about 6 tons but mine cuts out well before this. I was winching tree sections and using the 11 mm wire rope and a rope extension to reach some of the sections of tree. The winch cut out when the tree section dug in the bank but it did not break the rope. It made me think of what the winch pulling power was. Have any of you guys had a winch pull tested or have any idea where I could get it done. Does anyone have a clue how a winch could be downrated like this. Many thank, Bob Quote Link to comment Share on other sites More sharing options...
western Posted April 15, 2010 Share Posted April 15, 2010 maybe the load relief valve needs resetting, manual here Quote Link to comment Share on other sites More sharing options...
K88 MUD Posted April 15, 2010 Share Posted April 15, 2010 It will probly have a flow restrictor fitted in one of the pipes from the pump to the rotor....its there for a reason but with a bit of help from the manufactor you should be able to modifie it. My mile marker has one fitted but ive opened the hole up with the help from them and a lifting specailist to test it. Quote Link to comment Share on other sites More sharing options...
bobbd Posted April 15, 2010 Author Share Posted April 15, 2010 Thanks for the info, Just been under the landy and had a look at the pump that is on the back of the transfer box and it is a solid unit with in and out pipes but no adjustment that I can see, am I looking in the right place Thanks, Bob Quote Link to comment Share on other sites More sharing options...
K88 MUD Posted April 15, 2010 Share Posted April 15, 2010 Thanks for the info, Just been under the landy and had a look at the pump that is on the back of the transfer box and it is a solid unit with in and out pipes but no adjustment that I can see, am I looking in the right place Thanks, Bob Mine is inside one of the pipe fittings like a washer with a hole in it to limit the flow. What engine rev's did you have when winching ? Quote Link to comment Share on other sites More sharing options...
bobbd Posted April 15, 2010 Author Share Posted April 15, 2010 It will probly have a flow restrictor fitted in one of the pipes from the pump to the rotor....its there for a reason but with a bit of help from the manufactor you should be able to modifie it. My mile marker has one fitted but ive opened the hole up with the help from them and a lifting specailist to test it. It also has the outlets for hydraulic tools on the bumper and it says on the PDF file they have full flow from the pump so there will be full flow to the spool valve assy. It must be one of the pipes from the spool valve to the winch drive motor. Would new pipes give it full flow ??. Thanks again, Bob Quote Link to comment Share on other sites More sharing options...
bobbd Posted April 15, 2010 Author Share Posted April 15, 2010 Mine is inside one of the pipe fittings like a washer with a hole in it to limit the flow. What engine rev's did you have when winching ? It has the hydraulic throttle control which kicks in when winching, about 1500rpm. Quote Link to comment Share on other sites More sharing options...
bobbd Posted April 15, 2010 Author Share Posted April 15, 2010 maybe the load relief valve needs resetting, manual here Been looking at the pdf again and there are only 2 pipes on the motor in the diagram, mine has a third small bore pipe that returns direct to the tank, do you think the motor has a built in relief system. Thanks, Bob Quote Link to comment Share on other sites More sharing options...
Anderzander Posted April 15, 2010 Share Posted April 15, 2010 Page 17 of the manual in the link shows the PTO in a side view with the relief valve and locking nut - its on top of the pto. You'll get at it from the access panel under the middle seat - release the nut and screw the valve in to increase line pull. Quote Link to comment Share on other sites More sharing options...
ajh Posted April 16, 2010 Share Posted April 16, 2010 Find somewhere to borrow a pull strength gauge and you'll be able to get an accurate measure as well. Quote Link to comment Share on other sites More sharing options...
bobbd Posted April 16, 2010 Author Share Posted April 16, 2010 Page 17 of the manual in the link shows the PTO in a side view with the relief valve and locking nut - its on top of the pto. You'll get at it from the access panel under the middle seat - release the nut and screw the valve in to increase line pull. I have removed the panel and there is a bolt head sticking out of the top of the pto casing there is no lock nut or adjustment. The pump is just a block with in and outlets. could this be it. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted April 16, 2010 Share Posted April 16, 2010 I believe some of them have a PRV elsewhere in the system , possibly on the control block although I'm not 100% sure. Quote Link to comment Share on other sites More sharing options...
bobbd Posted April 16, 2010 Author Share Posted April 16, 2010 I believe some of them have a PRV elsewhere in the system , possibly on the control block although I'm not 100% sure. Had a nosey at the spool valve block and there is what could be the relief valve. It looks something like a brass coloured spark plug!!. It has lock nuts and a cap. What damage can I do by playing with this. . Could I do damage to the pump, that is my main concern. Thanks, Bob Quote Link to comment Share on other sites More sharing options...
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