Cleaning, Inspection and Repair
a. Replace all seals and preformed packing for
b. Clean all metal parts with cleaning solvent (Fed.
P-D-680, or equivalent) dry thoroughly with
c. Check wearing surfaces of cartridge parts for
scoring and excessive wear. Light score marks should he
removed by lapping. Parts with excessive scoring or wear
should be replaced.
d. Inspect vanes for burrs, wear and excessive play in
rotor slots. Dress down burrs carefully, with a medium Indian
stone. Rotors with worn slots should be replaced If vane tips
are scored replace vanes with a vane kit.
e. Check bearings for wear, looseness, roughness
and pitted or cracked races by rotating bearings on the shafts
while applying pressure. Replace defective bearings.
Inspect seal and bushing mating surfaces on shafts
for scoring or wear. Replace any shaft that the wear marks
cannot be removed by light polishing.
Check body and cover mating surfaces for paint or
burrs. Remove any paint or burrs prior to reassembly.
Reassembly and Installation
a. Refer to figure 17-12 and reassemble and install
dual steering hydraulic pump as follows:
(1) Install new wiper (46) and seal (45) in body (27). The
OD of seal (45) must be below the chamfer in (27). Place
bearing washer (44) against seal (45).
Soak new wiper (46) in clean engine oil prior to
(2) Press shaft (43) into bearing (42) with an arbor
press. Support inner race of bearing (42). Install snap ring
(41) o)n shaft (43).
(3) Cover shaft end and lubricate with grease or
petroleum to protect seal. Gently tap shaft (43) and bearing
(42) into body (27). Install lock ring (40).
The direct ion of rotation is as viewed from the
shaft end; right hand rotations is clockwise; left
(4) Place pressure plate (36) on blocks as shown in
figure 17-14. Set rotor (5, fig 17-12)on plate (36) with the
arrow pointed in correct direction of rotation (fig. 17-14, step
(5) Install locating pins (39, fig. 17-12) and position ring
(34) over )ins (39) and rotor (35), again observing the rotation
arrow (fig. 17-14, step 2).
(6) Install intra vanes (38, fig. 17-12) in vanes (37) and
place both in rotor slots with the sharp edges toward the
direction of rotation (fig. 17-14, step 3). Both vanes (37, fig.
17-12) and intra vanes (38) must move freely in the rotor Figure 17-14. Dual steering hydraulic pump, reassembly.