Proportioning valve
Proportioning valve
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
I just did this, used a line (rubber) for a 91 F250.
I wish I could find a Height Sensing Proportioning Valve, Now that I have rear brakes and no weight it locks up the rears when it's slippery... FUN!
Otherwise it's fine.
-Enjoy
fh : )_~
I wish I could find a Height Sensing Proportioning Valve, Now that I have rear brakes and no weight it locks up the rears when it's slippery... FUN!
Otherwise it's fine.
-Enjoy
fh : )_~
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
Why use a manual Prop valve ... So you DON'T have any brakes when you are loaded ...
You are better off locking the rear brakes when empty then not having enough brakes when loaded.
-Enjoy
fh : )_~
You are better off locking the rear brakes when empty then not having enough brakes when loaded.
-Enjoy
fh : )_~
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Fleet Mechanic
Joined: Apr 2007
Posts: 1,429
Likes: 4
From: patricia ab canada
with mine down all the time i have never had a problem stopping.even with my camper in the back of the truck pulling a loaded 18 foot cargo trailer.they don't lock up and she stops on a dime.plus you don't want the rear end locking up all the time,,hard on tires plus when your tires are locked up and skidding your braking is reduced, plus your out of control on wet pavement the **** end swinging around when the brakes are applied.
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Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
I agree, Lockup is not a good thing! But reducing loaded braking is far worse!
My rear tires don't lockup except when it's slippery (Snow and Ice) and the truck is empty!
I added ~400lbs in the bed and I no longer have that!
They do not lockup on wet or sandy roads even empty.
If your Height Sensing Proportioning Valve is in the down position, it is your front (and or trailer) brakes doing most of the work.
My bet is your Height Sensing Proportioning Valve is already failed anyways.
-Enjoy
fh : )_~
My rear tires don't lockup except when it's slippery (Snow and Ice) and the truck is empty!
I added ~400lbs in the bed and I no longer have that!
They do not lockup on wet or sandy roads even empty.
If your Height Sensing Proportioning Valve is in the down position, it is your front (and or trailer) brakes doing most of the work.
My bet is your Height Sensing Proportioning Valve is already failed anyways.
-Enjoy
fh : )_~
Fleet Mechanic
Joined: Apr 2007
Posts: 1,429
Likes: 4
From: patricia ab canada
i was checking my proportioning valve and noticed this. check between the axle and leaf spring.gotta get those out of there.love what previous owners do.buying new ubolts and get those babys out. poor mans lift.
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
Those are not a poor mans lift, those are factory, though that one is broken!
That is supposed to have a (uumm don't know what to call it) arm that sticks out, what it is for I do not know for sure, I think they are for tie down purposes.
I'm sure some one will respond.
-Enjoy
fh : )_~
That is supposed to have a (uumm don't know what to call it) arm that sticks out, what it is for I do not know for sure, I think they are for tie down purposes.
I'm sure some one will respond.
-Enjoy
fh : )_~
Fleet Mechanic
Joined: Apr 2007
Posts: 1,429
Likes: 4
From: patricia ab canada
i don't want to high jack this fourm.that leaver is the proportioning valve, when there is a load on the truck the leaver go's up,allowing more brake pressure to the rear brakes. those lift blocks are not factory.if you look closely those round parts are axle tubes.a previous owner cut a rear end up. cut the spring perches off and cut the tube in half.i can see this plain as day.ford would have not left rough cutting tourch cuts on something they produced.
Moderator
Joined: Jan 2001
Posts: 56,949
Likes: 2,718
From: Virginia
If this is a 4wd truck, those blocks could be factory. Like the other poster said, it looks like the arm has been cut off. That arm is supposed to stick out so a rubber bump stop can hit it. The rubber bumpstop is mounted on the bottom of the frame above this area.
The 4wd trucks did have blocks from the factory.
The 4wd trucks did have blocks from the factory.
Fleet Mechanic
Joined: Apr 2007
Posts: 1,429
Likes: 4
From: patricia ab canada
ok.i see someone must have cut them off with a torch. really rough.just never seen lift blocks like this. sorry was confused.by the way mhopkins hows that proportion valve,sorry didn't mean to hi jack your forum.
Logistics Pro
Joined: Jan 2007
Posts: 3,826
Likes: 101
From: Martinsburg, WV
The manual valve would be fine with a load, you would just need to remember to crank it up when you load up, Just like the ones we put on the Fox Bodies with the 5 lug and disc conversions.