F 250 4WD Pickup V8-7.3L DSL (1988)
Mainshaft: Service and Repair
Disassembly
DISASSEMBLY
1. Clamp output end of mainshaft firmly in a suitable soft jawed vise.
2. Remove 4th synchronizer ring from 3rd/4th synchronizer assembly.
3. Place bearing collets tool No. T87T-7025-FH or equivalent on either side of mainshaft front bearing.
4. Position puller tube, tool No. T77J-7025-B or equivalent in collets, then pass collet retaining collet retaining ring tool No. T75L-7025-G or
equivalent over puller and into collets so they clamp firmly to bearing.
Installing Bearing Collets
5. Pull bearing from mainshaft.
Removing 3rd Gear Sleeve
6. Remove 3rd/4th gear sliding sleeve from mainshaft.
NOTE: Place a cloth around synchronizer assembly to catch compression springs, pressure pieces and balls that will be released when sliding
sleeves are removed.
7. Remove 3rd/4th synchronizer body to mainshaft retaining ring, the place collet retaining ring tool No. T87T-7025-OH or equivalent over
mainshaft and let it rest on mainshaft 1st gear.
