My brakes have been pretty weird lately. When driving my brakes are really good when you are aggressive with them but when you are soft on the brake pedal you have no power/pressure until you reach the floor and then it locks up. I also have brake fluid leaking from the cap of one reservoir (the one closest to the back of the vehicle. And the reservoir closest to the front of the vehicle keeps needing to be topped up.
Is this just a result of the master cylinder needing to be changed? My guess is it’s from 77.
Yeah, the fluid is bypassing the seal around the MC piston and getting pushed out the cap when the piston returns instead of pushing the caliper piston and staying in the system. You definitely need a new MC.
So tell us, what year Huppmobile is it? Or is that a secret?
Toyota Dolphins were built on Toyota Hilux chassis. They didn’t have independent rear suspension but they had independent front suspension. A semi-floating solid rear axle with spring-under leaf suspension was found in the rear. A common upgrade is to replace the semi-float 5-lug rear axle with a full-floating, 6-lug axle from a later Toyota 1-ton chassis but if you’re removing the camper part, the 5-lug semi-float axle should be sufficient. Toyota offered at least two different frame lengths on their cab-chassis trucks in the 80s. The earlier ones may have only come in one length. You can look at the original brochures here: http://www.toyotareference.com/hilux
So I ordered a Brake master cylinder (Centric) and the brake lines go in on the bottom of the brake MC rather than the side. My brake lines are set up to go in on the side. So I guess now my only two options are to send the MC back or to buy new brake lines right? Are brake lines something that most places will stock or is this something I am going to have to source out on the internet again?
ALSO! There is a second component to brake MC on the vehicle now. I am not sure what it is, you guys probably will. After the brake line leaves the MC it goes about 6 inches and then goes through another small metal piece attached to the brake booster then another brake line comes out the other side. Both sides of this “small metal piece” have similar connections to MC. Anyone have an idea or should I take some pictures to show everyone?
From what I’ve been able to dig up, which isn’t much, the proportioning valve was definitely different on the Dolphin than on the regular Hilux. Wouldn’t surprise me if the MC was too - they’d have had to beef up the brakes to haul the coach assembly around.