Yep it's a good question. Has stumped me in the past. Just did some quick web research (haven't got any books at all with me atm).
These links may help for starters.
http://holdenpaedia.oldholden.com/Br...rtioning_Valve - (need to scroll down to bottom of page to see all three entries)
http://www.aussiev8.com.au/members-l...ing-valve.html - (look especially at post #4, it also conflicts with psi numbers on post #1)
But, this is only brief web research, and isn't conclusive, the aussie8forum post #4 lists four valves, and the holdenapeadia site entry only comes up with three, also neither focus on vans. (I realise you have a ute Jim).
For the brakes to work as designed you obviously need the right proportioning valve for your set up, however (and I have wondered this before), many H series in existence today may have had the valve replaced with a spare from a wreckers by a previous owner at any time, and that could have come off Torana or any 70s H series - which may be the issue you face Jim, - (unless, as an alternative, the wiring harness could have been changed/adapted)?
About a decade ago I got handed a "clean" proportioning valve for my HJ wagon from a wrecker who pulled it off a car with good lines for me, but I never knew what it came off! (it passed the brake test at rego so lol.... well, lol with a 'hmmmn um' , attached.)
Knowing what models of proportioning valve were used, and which one for which type of vehicle and brake set up has always been beyond me - I never knew where to get the information. Does anyone happen to know off-hand? Otherwise, maybe this could be a good research thread.
An affirmed and accurate list, (model nos, crack points, vehicle series and brake options) would be a really useful thing.
Reply With Quote
Bookmarks