Detroit Diesel — Assemble Oil Pump (8V Engines)
Repair & overhaul · Lubricating oil pump
From a Detroit Diesel service manual — check it applies to your exact model before use.
Before you start
- Place a washer between the end of the drive shaft and the puller screw to prevent damage to the drive shaft.
Procedure
- Lubricate the driven shaft with engine oil and insert the drilled end in the pump body. Align the drilled holes and install a new pin to secure the shaft.
- Install a key in the second keyway from the drive gear end of the drive shaft. Press the drive gear on the shaft so it is positioned 2.22 in from the drive gear end.
- Lubricate the end of the drive shaft and slip the gear and shaft assembly through the bushing in the pump body. Install a key in the shaft.
- Start the oil pump drive gear on the drive shaft with the ribbed side facing away from the pump and the slot aligned with the key. Press the gear on to give .020 in maximum clearance when the internal
- Lubricate the driven shaft and slide the driven gear on the driven shaft.
- Attach the cover to the body with six 3/8-16 x 1 1/2 in bolts and lock washers. Tighten the bolts to 30-35 lb-ft (41-47 N*m).
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Cover bolts 30-35 FridayParts $14.81 KuduParts $233.00 lb-ft
- Drive gear position 2.22 in from drive gear end
- Internal gear to body clearance .020 in max; to cover .006 in min
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.