tychoS Posted April 27, 2008 Share Posted April 27, 2008 Having installed a Milemarker H12 we set out to test it on a hill. Uphill went fine, no funny noises and a nice steady pull in low gear. Upon reversing however, the winch screamed at us, the speed varied quite a bit between 2x and 4x the uphill speed, with a period of say one meter of cable, as if the winch alternated between freespooling and providing some resistance. What could be wrong? The winch, pump, control block and installation instructions are those available as a kit from www.4x4winches.com. Quote Link to comment Share on other sites More sharing options...
m&mv80 Posted April 27, 2008 Share Posted April 27, 2008 did you make sure the little disc was inserted into the port of the valve block (cant remember off hand which one) this is to stop it runninig away when spooling out under load, you should be able to tell by the fact that when spooling in the winch is almost silent but when spooling out you can hear a 'screaching' noise from the relief valve, (you can check this off load) cant think of anything else off the top of my head but there are a lot of knowledgeable people on here who can prob help you more than i can hth cheers martin Quote Link to comment Share on other sites More sharing options...
Happyoldgit Posted April 27, 2008 Share Posted April 27, 2008 I'm moving this out of the Defender forum to the Int'l where it might attract more traffic. Quote Link to comment Share on other sites More sharing options...
pugwash Posted April 27, 2008 Share Posted April 27, 2008 Having installed a Milemarker H12 we set out to test it on a hill.Uphill went fine, no funny noises and a nice steady pull in low gear. Upon reversing however, the winch screamed at us, the speed varied quite a bit between 2x and 4x the uphill speed, with a period of say one meter of cable, as if the winch alternated between freespooling and providing some resistance. What could be wrong? The winch, pump, control block and installation instructions are those available as a kit from www.4x4winches.com. Do you have a PTO pump and were you driving the vehicle in reverse with the winch engaged? or do you just mean that you were trying to lower out? Quote Link to comment Share on other sites More sharing options...
BogMonster Posted April 27, 2008 Share Posted April 27, 2008 Sounds like the restrictor is either missing or around the wrong way (or in the wrong pipe) to me too. I have not tried it but I think what happens is the motor on the winch acts as a pump and pumps the fluid back through the return system too fast and what you are hearing could be cavitation in the hydraulics due to a lack of resistance in the outlet from the winch when you are letting out. As said you should hear a "hydraulicy" noise when powering out with no load on the cable, if you don't hear this and it is as silent as it is on winch in, then there is something wrong. If you are getting hydraulic noise when winching in with nothing on the cable, and no noise when winching out, I'd be almost sure the pipes are fitted the wrong way round! Quote Link to comment Share on other sites More sharing options...
Milemarker Type S Posted April 27, 2008 Share Posted April 27, 2008 As has been said you either have the little disc with the hole the wrong way round or indeed missing completely- it should be in the port on the valve block that it attached to the upper connection on the winch with the slot facing outwards as per page 3 here The disc basically ensures that there is enough hydralic resistance when you are lowering out under load to prevent the system trying to overrun the pump and therefore causing negative pressure which leads to cavitation- causing the nice screaming noise! Quote Link to comment Share on other sites More sharing options...
tychoS Posted April 28, 2008 Author Share Posted April 28, 2008 We have had a look at the location of the "little disc". It appears that we did place it in the correct hole and oriented correctly according to the installation instructions, but that we swapped the hoses to the winch around. We are sorting this at the moment and will test it later today after having aired the system out. Quote Link to comment Share on other sites More sharing options...
Milemarker Type S Posted April 28, 2008 Share Posted April 28, 2008 We have had a look at the location of the "little disc". It appears that we did place it in the correct hole and oriented correctly according to the installation instructions, but that we swapped the hoses to the winch around. We are sorting this at the moment and will test it later today after having aired the system out. Easy mistake to make as the top hose on the valve block goes to the bottom connection on the winch... obviously depending on which way up you have your valve!!! Quote Link to comment Share on other sites More sharing options...
tychoS Posted April 28, 2008 Author Share Posted April 28, 2008 Test finished. The winch operates perfect now. Thanks for the help, it lead us strait to the solution. Much appreciated. We will participate in Pomerania at the end of this week, and really look forward to winching for long periods without overheating or low battery issues. Quote Link to comment Share on other sites More sharing options...
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