Detroit Diesel — Assemble Blower Drive Gear And Support Assembly
Repair & overhaul
From a Detroit Diesel service manual — check it applies to your exact model before use.
Procedure
- With the blower drive support clamped in soft jaws, position the inner blower drive gear thrust washer on the support so the tangs register with the holes.
- Lubricate the hub of the support, the bushings in the gear, both thrust washers and the support thrust washer with clean engine oil.
- Slide the gear on the hub with the flat side of the gear down.
- Install the second thrust washer with the tangs facing up (brass side toward the gear).
- Position the blower drive support thrust washer on the support so the slots register with the tangs on the gear thrust washer.
- Place the lock washer on the support against the thrust washer with the small tang in the slot; install the locknut and tighten to 50-60 lb-ft.
- Bend the tabs on the lock washer against the flats on the nut.
- Check the clearance between the blower drive gear support thrust washer and the blower drive gear thrust washer (.002"-.018").
Tools required
- Bench vise with soft jaws Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Blower drive gear locknut 50-60 FridayParts $15.68 lb-ft (68-81 N·m)
- Thrust washer clearance .002"-.018"
- New gear thrust washer thickness .1190"-.1210"
Source: Detroit Diesel service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.