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 Rear Disc headache 88 Pajero swb
#794695
03/05/07 09:41 PM
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Joined: Sep 2006
Posts: 9
OP
Need a Spot
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Hello, i have been having a rough go trying to change the rear pads on my 88 pajero, it has rear disc, which is great however, i cannot get the brake pistons pressed back to accept the new pads.
Can these piston be pressed back with leverage or is there a trick to them?
i have tried pressing them back with a long bar (foot and a half) but they dont budge. i seem to remember hearing somwhere that they need to be screwed back but i cannot find that reference again. any help is appreiciated.
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Re: Rear Disc headache 88 Pajero swb
[Re: skaught]
#794696
03/05/07 10:30 PM
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Joined: Aug 2004
Posts: 576
Rock Warrior
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Use a big C-Clamp and maybe a block of wood to push the piston back into the caliper. Keep an eye on your fluid level, and don't forget to pump the brakes a few times to reset the piston when you start the car back up. Otherwise nothing will happen when you try to stop that first time. <img src="/forums/images/graemlins/scared.gif" alt="" />
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Re: Rear Disc headache 88 Pajero swb
[Re: JacknCoke]
#794697
03/05/07 11:09 PM
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Joined: Jan 2000
Posts: 16,227
Web Wheeler
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Use a big C-Clamp and maybe a block of wood to push the piston back into the caliper. Keep an eye on your fluid level, and don't forget to pump the brakes a few times to reset the piston when you start the car back up. Otherwise nothing will happen when you try to stop that first time. <img src="/forums/images/graemlins/scared.gif" alt="" /> This is what I do also. I use a big C clamp & a big flat metal plate to push it back in. IIRC the C clamp has something like an 8" opening. This way you apply even pressure across the entire piston. You also have to be careful that the rubber dust protector folds up properly when the piston recedes. <img src="/forums/images/graemlins/kewl.gif" alt="" />
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Re: Rear Disc headache 88 Pajero swb
[Re: skaught]
#794698
03/05/07 11:51 PM
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Joined: Sep 2006
Posts: 2,712
Roll Me Over
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If I am correct these are a parking brake caliper?
The pistons are threaded internally and have recesses in there face for a tool to grab and twist them in.
I generally use a syringe with ATF to lubricate the piston, you can lift the dust seal to get a bit of lube in there also.
You can make a tool, buy one or use long nose pliers.
But please do not use a C clamp.
Cheers, Charlie
If It ain't broke, Modify it!
87 Montero turbo Converted back in Spring1989
95 Montero SR 3.8 DOHC Only one?
93 Pajero 3 door 6G75 Mivec with paddle shifted 5 speed
Then a Gen2 SR with full coil independent suspension.
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Re: Rear Disc headache 88 Pajero swb
[Re: OldColt]
#794699
03/05/07 11:59 PM
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Joined: Jan 2000
Posts: 16,227
Web Wheeler
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If I am correct these are a parking brake caliper?
The pistons are threaded internally and have recesses in there face for a tool to grab and twist them in.
I generally use a syringe with ATF to lubricate the piston, you can lift the dust seal to get a bit of lube in there also.
You can make a tool, buy one or use long nose pliers.
But please do not use a C clamp. Hmmm when examining mine recently I saw that it doesn't have a caliper for the parking brake as it uses the standard drum brake for parking brake duties. I just assumed he did some kind of disk brake conversion on his such as swapping in an axle from a Gen II or something.
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Re: Rear Disc headache 88 Pajero swb
[Re: OldColt]
#794700
03/06/07 12:47 AM
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Joined: Sep 2006
Posts: 9
OP
Need a Spot
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OldColt , ok so i think you may be on the right track. The E-brake uses the piston and the piston really did not want to give when i tried to push it back -hope i dint screw any thing up- i did try to turn the whole piston, but it didnt seem to want to turn is it standard righty tighty lefty loosey? or do you kinda wiggle it back?. im at work right now so i'll have to try this in the morning.
Thank you all for your replies
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Re: Rear Disc headache 88 Pajero swb
[Re: skaught]
#794701
03/06/07 02:29 AM
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Joined: Sep 2006
Posts: 2,712
Roll Me Over
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The gen 1 rear discs are closer to a Starion style caliper.
The gen 2 are drum in disc, a much simpler caliper but the parking mechanism can have its own problems from moisture retention tightening the actuating arm on the brake shoe.
Yes the tread is standard rotation, give a push while you twist it. A little bit of lubricant on the pistons every few years can keep moisture out and keep things moving free.
Cheers, Charlie
If It ain't broke, Modify it!
87 Montero turbo Converted back in Spring1989
95 Montero SR 3.8 DOHC Only one?
93 Pajero 3 door 6G75 Mivec with paddle shifted 5 speed
Then a Gen2 SR with full coil independent suspension.
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