cover (41) and new gasket (30) to water
pump body (15). Check clearance
between impeller vanes and cover; it
should be 0.020 to 0.040 inch (0.051 to
Water Pump With Idler Assembly.
(1) Disassembly. Prior to disassembly, remove
the water pump and idler assembly in
accordance with the Operator/Crew and
Organizational manual. Refer to figure 13-
(a) Remove screws (3) and washers (4) and
separate cover (21) from the body (52).
Remove and discard gasket (17).
(b) With a suitable puller, remove impeller
(11) and pulley (6). Remove front water
pump oil seal (7).
(c) Support water pump body (52) on
impeller end. Press the water pump
shaft (16) and bearing assembly (8)
from the body by applying pressure to
the pulley end of the shaft.
(d) Remove bushing (14), gasket (15) and
water pump seal (13) from the shaft
(e) Remove the inner race (cone and
bearing) of the roller bearing assembly
(8) with a suitable puller.
Remove the two bearing races of the
roller bearing assembly (8) from the
water pump body (52) with a suitable
retaining ring. Do not damage pump
(g) Remove large retaining ring of bearing
assembly (8) from the water pump
(h) Remove screw (22) and washer (23)
and take off idler pulley cover (24) and
Remove locknut (26).
Remove idler pulley (29) and bearing
assembly (28) from idler shaft (31).
(k) Remove rear oil seal (30) from the idler
Remove inner bearing races (cones)
from the pulley.
(m) With a suitable puller or punch, remove
the bearing races (cups) from the
retaining ring. Do not damage idler
(n) Remove the bearing retaining ring
inside the idler pulley.
(o) Remove the retaining ring (37) and
washer (38) from the pivot shaft (35).
(p) Remove the pivot arm bushing (40) and
O-rings (36) from the shaft.
(2) Repair. Proceed as follows:
(a) Inspect pump body and idler bearings
for rough or worn races, or damaged
shield. Replace if necessary.
(b) Inspect impeller and cover for cracks or
corrosion. Replace if necessary.
(c) Measure internal clearances and press
fits in accordance with tabulated