Howto: Center Support Bearing replacement (93 pickup)
#1
Registered User
Thread Starter
Howto: Center Support Bearing replacement (93 pickup)
I just had to replace my center support bearing this weekend, and since I didn't see a howto here I thought I would post one up.
I performed my replacement on-vehicle. Most writeups and the FSM call for removal and replacement on bench. I didn't have a way to keep the shaft clamped off of the vehicle so I got creative.
I don't have the pics right now; I'll upload them when I get home.
Tools needed:
Procedure:
I performed my replacement on-vehicle. Most writeups and the FSM call for removal and replacement on bench. I didn't have a way to keep the shaft clamped off of the vehicle so I got creative.
I don't have the pics right now; I'll upload them when I get home.
Tools needed:
- 2 14mm box wrenches
- 12mm and 14mm sockets and ratchet
- 24mm impact socket and breaker bar
- 3-jaw or bearing Puller (I didn't need to use this, but some folks might)
- Small chisel or trash screwdriver Approx 3/16" wide
- Hammer
- Dead blow/rubber mallet
- Chain wrench, or 6" pipe wrench
Procedure:
- Remove dust cover from behind CSB (12mm bolts)
- Clean and mark the driveshaft, you need to be able to align the front shaft to the flange and the flange to the rear shaft yoke. My shaft still had a painted line from a balance job I had done a few years ago.
- Disconnect rear shaft yoke from front shaft flange (14mm nuts/bolts)
- Now you should be able to see the staked nut on the inside of the flange. Use the hammer/chisel to carefully open up the stake in the nut. (I've heard that the nut can be safely removed with an impact wrench, but I didn't have one)
- Attach chain/pipe wrench to the front yoke of the front driveshaft half. My truck was low enough that the chain wrench could be braced against the ground. If you have a lift you may need to find another bracing method (or a helper)
- Loosen the flange nut with the breaker bar (even after chiseling, this can take a lot of muscle)
- Detach center support bearing from bracket on frame (14mm bolts)
- Remove flange nut and washer, then pull the flange and shim,
- Pull the old bearing
- Clean old grease and contaminants off of the splines of the shaft, and out of the flange, then replace with fresh grease
- Slide new bearing onto shaft (FSM says to install with corner cutouts facing rearward)
- Slide the shim and flange on to drive shaft, ensuring that the marks you made line up. Use a mallet to drive flange onto shaft if necessary.
- Replace flange washer and nut then hand tighten
- re-attach center support bearing to support and tighten the bolts to hold the bearing in place.
- Change the direction of your chain/pipe wrench and torque flange to 134 ft/lbs
- Back the nut off, then re-torque to 51ft/lbs
- Using hammer/chisel, stake the nut back into cutout on spindle.
- re/attach rear half of driveshaft to flange and replace dust cover.
Last edited by technojunkie; 05-14-2012 at 01:03 PM.
Thread
Thread Starter
Forum
Replies
Last Post