Page 1 of 1
Soft brakes and Loosing brake fluid
Posted: Sat May 23, 2009 4:39 pm
by MARKx4
My brakes on my 88 GQ SWB patrol with 3" lift and 33s have become real soft latelly and ive been loosing breake fluid but i cant find where the fluid is leaking?
Any idea on what the problem could be and where is the best place to start fixing the problem.
MARKx4
Posted: Sat May 23, 2009 5:01 pm
by Jacked
from the back of the master cylinder into the booster
Posted: Sat May 23, 2009 6:33 pm
by MARKx4
Does that mean i need to change the master cylinder or the booster?
Posted: Sat May 23, 2009 6:51 pm
by meiamaro
If there are no obvious leaks,
Clamp rubber hoses's at diff. Now push brake pedal.
1/ if soft,undo master(no need to crack lines) and move it out
far enough to check if the rear seal is leaking.It should be.(new master needed)
2/ If hard, release font hose clamp and try again.
if soft you can isolate wich caliper by clamping the hose's on the caliper.
if its hard, repeat # 2 on the rear.
fluids/coolant just dont disappear,they must go sumwhere.
Hope this helps
Cheers Ian.
Posted: Sun May 24, 2009 5:04 pm
by NutterGQ
does the car have body lift? and dont forget to check proportioning valve
Posted: Sun May 24, 2009 5:23 pm
by MARKx4
It doesnt have a body lift, ill have to check what has been mentioned. Thanks for the replys, keep them coming.
Posted: Sun May 24, 2009 5:27 pm
by waandy
i had same problem with me laser. brakes were soft an say if u stopped for an intersection ur foot would sink to the floor. was master cylinder. goes well now
Posted: Sun May 24, 2009 5:51 pm
by NutterGQ
best bet start by clamping off then pull master back as mentioned.
Posted: Sun May 24, 2009 7:49 pm
by meiamaro
NutterGQ wrote:does the car have body lift? and dont forget to check proportioning valve
Yea, always a good idea to bleed brakes when vehical is on the ground position(no axles hanging in the air)on axle stands is ok.
sometimes the prop valve give a ????? during bleeding.
Cheers Ian.
Posted: Mon May 25, 2009 11:57 am
by Jacked
if its "useing" fluid and he is needing to top it up its got nothing to do with proportioning valve unless the valve is leaking.
Mark just undo the 2 bolts that hold the master to the booster, bend it out a little and have a look. if its wet its the master. Thats as long as you have already looked around for a fluid leak at the calipers/lines/hoses
Posted: Mon May 25, 2009 6:38 pm
by MARKx4
Ill check it out in the next couple of days. Loving the replys, allways need new info on fixing things.