1986 XJ700S Front Caliper

First I want to say I am so happy to have this forum as a resource, I was drawn to the Maxim after rebuilding a 1971 Yamaha R5D 350. Anyway really this site seems to be the oracle on all things XJ.

I think I did my diligence in searching for this information. I had to split the front calipers as they we full of crud. Len was spot on that behind the old o rings is hardened brake fluid and crud that has to go. I struggled to get the pistons out and in the end I watched a shop easily slip a straight punch into the crossover hole and blow air into the piston and out it came.

So what is the torque spec for bolting these halves together? The service manual says to not loosen those bolts so no torque offered.

Many thanks

 

Interesting, I just checked my service manual and I can’t find any torque specs for those either. However, the torque for the mounting bolts is 25 ft-lb. I separated my calipers for a complete rebuild and I hand tightened them pretty tight and used some of the blue thread lock. It has been a couple of years with no problems.

 

Pretty darn snug............

 

How does one dial in “pretty darn snug.”

 

I have that setting on my wrenches.....don't you?

 

I have the "click" built into my elbow. I either wait for the click or stop at German torque

 

Yup, it's right there between and "not sure " and "oops!"

 

Tighten until the fastener spins freely, then back off 1/2 turn.

The real answer is to consult a general torque table (for steel fasteners in aluminum), and use medium strength threadlock.

 

i know this is an old post, but i recently serviced my calipers. I used a torqometer by snap on to measure the disassembly torque , and all 4 bolts were at 15 ft lbs. (182, 182, 185 and 179 inch pounds to be exact) I realize that is lower than the similar bolt holding it to the fork, but there may be a reason associated with heat or the direction of forces.

 

Wow, that seems really low (not doubting you though), we've always had to use a breaker bar to get them loose, just by feel, I would estimate 40-50 ft-lbs...........