M978 Tanker Maintenance Procedures Instructions (Cont)
22-3. PRIMARY PUMP HYDRAULIC MOTOR REPAIR (CONT).
Measure thickness of gear housing (7)
and record measurement.
Compare gear housing measurement and
gear thickness measurement. If gear
housing measurement is 0.0035 in.
(0.088 mm) greater than gear thickness
measurement, replace both gears.
Measure distance across gear boxes of
housing (7) along dowel pin center line.
Replace housing (7) if measurement is
greater than 3.259 in. (82.77 mm).
Wear safety glasses while installing retaining rings to protect
eyes from possible injury or blindness.
Lubricate seal (1) with oil and install seal and retaining
ring (2) in adapter (3).
Lubricate backup ring (4) with
grease and install backup ring and
preformed packing (5) on
Lubricate bushing (6) with grease and install fiber
washer (7) and two roller bearings (8).
Install two balls (9) and plugs (10).
Lubricate two preformed packings (11) with grease
and install preformed packings and packing