In my '84 BJ60 I replaced the brake master cylinder a couple of weeks ago with a new part sold under the Beck Arnley brand. Post install inspection reveals that it's already leaking out the back, and down the front of the brake booster. I used a generic auto parts store brand of brake fluid, DOT 3 spec in the system. I have used this or a similar brand of fluid since I've had the truck. The clutch master cylinder (EBI carried part / non Toyota) also leaks out the back too. This wasn't leaking as quickly, but didn't stay leak free for more than 2 - 1/2 yrs. after install. It was the replacement for a new Toyota OEM clutch master cyl. that started leaking within a year of installation.
I swapped out the brake master cylinder to trouble shoot a brake fade issue that I thought could be attributed to brake master cyl. bypass. It did not solve the problem. I might end up putting the original brake master back in as it wasn't leaking at the rear.
Just wanted an opinion on what I could do to not have leaks as mentioned above. Are the non-Toyota parts garbage? Has anyone else had the same issues? Should I use DOT 5 fluid instead? Should I look for a better quality brake fluid? My thoughts were to use Toyota parts only but after the new clutch master leaked, I figured they might be just as bad.
When I push the pedal, the brakes grab OK. If I apply them hard enough (emerg. stop) the pedal seems to sink further with no increase in brake effectiveness detected. I thought I remember being able to lock the front tires on dry pavement (BFG ATs 33 x 12.5 R 15) but maybe I am being optimistic for the stock system.
I can push the pedal to the point where it stops the truck, and then continue to push the pedal further without any resistance besides the pedal return spring. I drove another 60 series once and when brakes were applied, the pedal firmed up and couldn't be moved further towards the firewall. That's what lead me to believe my original brake master was bypassing and why I replaced it. But I don't drive many other cruisers besides mine so I don't have much to compare to in terms of first hand experience.
Many thanks if you can help.
I swapped out the brake master cylinder to trouble shoot a brake fade issue that I thought could be attributed to brake master cyl. bypass. It did not solve the problem. I might end up putting the original brake master back in as it wasn't leaking at the rear.
Just wanted an opinion on what I could do to not have leaks as mentioned above. Are the non-Toyota parts garbage? Has anyone else had the same issues? Should I use DOT 5 fluid instead? Should I look for a better quality brake fluid? My thoughts were to use Toyota parts only but after the new clutch master leaked, I figured they might be just as bad.
When I push the pedal, the brakes grab OK. If I apply them hard enough (emerg. stop) the pedal seems to sink further with no increase in brake effectiveness detected. I thought I remember being able to lock the front tires on dry pavement (BFG ATs 33 x 12.5 R 15) but maybe I am being optimistic for the stock system.
I can push the pedal to the point where it stops the truck, and then continue to push the pedal further without any resistance besides the pedal return spring. I drove another 60 series once and when brakes were applied, the pedal firmed up and couldn't be moved further towards the firewall. That's what lead me to believe my original brake master was bypassing and why I replaced it. But I don't drive many other cruisers besides mine so I don't have much to compare to in terms of first hand experience.
Many thanks if you can help.