TM 5-3810-300-24&P-3
1.7.7
ACCESSORY DRIVE
Fig. 1 - Accessory Drive Locations
Accessory drives have been provided on the rear of
Belt driven accessories, such as battery charging
engines to accommodate both gear driven and belt
generators or air compressors, are driven off the
driven accessories.
camshaft or balance shaft gears by a drive hub, and
pulley (Fig. 4), or a drive plate, drive shaft, and pulley
For possible accessory drive locations and rotation of the
drive at a particular position, refer to Fig. 1.
In the first arrangement, illustrated in Fig. 4, the drive
The drive for direct gear driven accessories, such as air
pulley hub is bolted to the camshaft or balance shaft
compressors or hydraulic pumps consist of a drive hub,
gear. The oil seal retainer is bolted to the flywheel
coupling and drive plate (Fig. 2) or a spacer, drive plate
housing, and the pulley is keyed to the drive hub shaft
and drive coupling (Fig. 3).
which extends through the oil seal retainer.
The drive plate, and spacer when used, are bolted to the
In the second arrangement, shown in Fig. 5, the spacer
camshaft or the balance shaft gear. The accessory is
and accessory drive plate are bolted to the balance shaft
bolted to the flywheel housing and driven by a drive hub
gear. The accessory drive shaft is splined to the drive
plate at one end and supported by a bearing in the
accessory drive retainer at the other end. The accessory
The current drive coupling and plate has 21 external
drive retainer, which
teeth, the former coupling and plate (Fig. 3) had 23
external teeth.
Fig. 3 - Hydraulic Pump Drive
Fig. 2 - Air Compressor Drive
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