I have a 1984 toyota pickup sr5 22r and i recently lost my front brakes. I have bled them multiple times and replaced the master cylinder. i bench bled the master cylinder and still no change. what else can it be? When i lost them i had the truck stuck in the woods for a few days and tore one of the boots on the piston in the brake caliper so i replaced the whole caliper with a new one.

 

You did bleed all the brakes ??

Sometimes it can take quite a while to get all the air out.

 

Yes I did I borrow a vacuum bleeder from a friend I will see if it works tomorroq after work

 

don't forget to bleed the LSPV

 

I did bleed the lspv a couple times but the first time there was a lot of sediment crap in it it actually stained my garage floor hahah I'll bleed it when I get up today (night worker) so I'll let yall know thanks for the replies

 

its weird that you would lose front brakes. id take all the lines off the master and the calipers/drums. blow air thru them get all the ˟˟˟˟ out of them and get new fluid. usually what happens is youll lose rear brakes cause if you have sediment in the lines and it clogs up the lpsv or whatever will sent the fluid back to the front pass tire itll feel like your losing brakes but it just moves the fluid around the system. id blow the lines out remove the lpsv (or whatever) and just take a hard line back to the rear axle so you have 2 lines up front and 2 lines in the rear.

 

had some stuff come up and didnt have time to bleed them but i think i have tommorrow off so ill stay up and try and get them bled if i still dont get them ill blow them out and delete the lspv

 

well i got out there and bled them still not better someone suggested a proportioning valve by the firewall tonight at work so ill have to go look for it in the morning when i get home

 

Still not getting them to bleed ??

Perhaps a poor connection from replacing the calipers all it takes is dirt

might be a bad bleeder valve drawing air in.

Have the calipers on correct ?? Bleeder at the top??

 

Well update I deleted the lspv with a brand new direct line to the axle. bled them again and still no front brakes on either side they will stop a spinning tire but you can still turn the tire by hand with not much pressure. And I only had to replace the one caliper but they are both acting the same

 

Oh and I had to tear into the tranny when I got it stuck I don't know if that would make a difference

 

And also as soon as I start it the brake pedal gets super soft. When I try to pump the brakes up my idle raises

 

with power assist brakes, if you hold the brake pedal down before starting the truck, i think that it's supposed to sink down right when the truck starts up... feels weird, but it's not wrong.

 

Well I had a doh moment the caliper I installed had the bleeder valve on the bottom side of the caliper so it wouldn't let all the air out once I switched it out I got it all rebled and bam I'm wheeling again

 

Nailed that one !!

Glad you got it fixed.