Detroit Diesel — Install Crankshaft Pulley
Repair & overhaul
From a Detroit Diesel service manual — check it applies to your exact model before use.
Before you start
- Do not hit the crankshaft end bolt after the last tightening.
- Do not bar the engine over by turning the crankshaft bolt in a counterclockwise direction.
Procedure
- Place the Woodruff key(s) in the key slots in the hub.
- Slide the crankshaft pulley over the hub, aligning the key with the keyway.
- Place the cone over the hub and into position against the pulley.
- Place the pulley retainer on the pulley retaining bolt and thread the bolt into the end of the hub.
- Tighten the bolt to approximately 400 lb-ft, strike the end of the bolt with a lead hammer, then tighten to 450-500 lb-ft.
- On engines with a crankshaft pulley retaining plate, install the plate and three bolts and lock washers; tighten to 30-35 lb-ft.
Tools required
- 2 or 3 pound lead hammer Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Pulley retaining bolt 450-500 lb-ft (610-678 N·m)
- Retaining plate bolts 30-35 FridayParts $14.81 KuduParts $233.00 lb-ft (41-47 N·m)
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.