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Hd7g Hd6ec brake control valve
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doctorcorey View Drop Down
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Joined: 17 Jul 2011
Location: S. KC Missouri
Points: 589 		Post Options Post Options   Thanks (0) Thanks(0)   Quote doctorcorey Quote  Post ReplyReply Direct Link To This Post Topic: Hd7g Hd6ec brake control valve
    Posted: 29 Feb 2012 at 6:10pm
  Anyone here ever replace inner and outer seals on these. Just looking for some heads-up and any advice on sourcingTongue the seals. Mine were fine 'till I had to remove the spool to service the tranny control valve, and after reassembly they started leaking; probably were dry rotted and didn't like being disturbed. Thanks, Corey Chartier
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Mactractor View Drop Down
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Joined: 20 Jun 2011
Location: New Zealand
Points: 652 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mactractor Quote  Post ReplyReply Direct Link To This Post Posted: 29 Feb 2012 at 7:20pm
Minpar is always a good starting point for parts Corey. I`ve never had to replace those on my tractors. When I got my first one with power assist brakes, an old timer advised me to back the relief pressure on those valves way down to less than 100psi (factory setting about 350 I think). He said I would then never snap brake bands which was a common occurance. Have to put a lot more boot power on the pedals when tractor is cold, but once up to operating temp, brakes work just as good.
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