Detroit Diesel — Checking the Fuel Pump Driven Gear Bolt Torque
Testing & diagnosis
From a Detroit Diesel service manual — check it applies to your exact model before use.
Before you start
- NOTICE: Do not apply a torque over 30 N·m (22 lb·ft); excessive torque can cause bolt/gear failure.
Procedure
- Remove the fuel pump.
- Set a clicker-type torque wrench to 30 N·m (22 lb·ft).
- Turn the torque wrench until it clicks; if no resistance and the shaft turns freely, proceed to further inspection.
- Remove the crankshaft vibration damper (refer to 1.11.1).
- Remove the idler pulley (refer to 8.1.9).
- Remove the air conditioner compressor pad (refer to 8.1.11).
- Remove the camshaft gear cover.
- Remove the bolt and use a puller to remove the gear.
- Check the mounting between bolt, gear, and shaft; replace damaged parts.
- Install gear and bolt with Loctite 271 sealant; hold with J-46187 and torque bolt to 35 N·m (26 lb·ft).
- Install camshaft front cover with eight bolts; torque to 50 N·m (37 lb·ft).
- Install the air conditioner compressor pad (refer to 8.1.12).
- Install idler pulley (refer to 8.1.10).
- Install the alternator and electrical connections.
- Install the crankshaft vibration damper (refer to 1.11.2).
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Check torque setting: 30 N·m (22 lb·ft)
- Driven gear bolt final torque: 35 N·m (26 lb·ft)
- Camshaft front cover bolts: 50 N·m (37 lb·ft)
- Fuel pump bolts: 25 N·m (18 lb·ft)
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.