DETROIT DIESEL 53
2.2.1
FUEL PUMP DRIVE
The fuel pump is mounted on the flywheel housing and
is driven by an accessory drive gear. The fuel pump
drive consists of a gear, stationary hub and drive
adaptor (Fig. 1). The fuel pump drive gear rotates on
the stationary hub attached to the cylinder block and is
driven at approximately twice the engine speed by the
camshaft gear.
Fig. 2. - Camshaft Drive for Fuel Pump (6V Engine
Lubrication
Shown)
The fuel pump drive gear bearing (bushing type) is
Remove Fuel Pump Drive Gear (V-Type Engine)
pressure lubricated. Lubricating oil from the oil gallery
in the cylinder block flows through a drilled passage in
With the flywheel housing removed, the fuel pump drive
the block, around the gear retaining bolt, and through
gear may be removed as follows:
another drilled hole in the gear hub to the bearing.
1. Remove the bolts and detach the fuel pump drive
adapter from the gear.
2. Loosen the fuel pump drive gear retaining bolt and
remove the bolt, gear, washers and hub from the
engine.
Fig. 1. - Typical Fuel Pump Drive Gear Mounting and Details (V-Type Engine)
1970 General Motors Corp.
December, 1970
SEC. 2.2.1 Page 1
