b. Check the center area of thrust plates where the
a. Peen edge of check valve holes 1/32 to 1/16 in.
gears mesh. Erosion in this area indicates oil
using a 1-1/2 in. diameter steel ball.
Pitted thrust plates indicate
cavitation or oil aeration. Discoloration of plates
3. INSTALL SHAFT END BEARING AND SEALS.
would indicate overheating, probably as a result
of insufficient oil.
4. INSPECT BEARINGS.
Coat outer edge of new lip seal (17)
with Aviation Form-A-Gasket No. 3
non-hardening sealant or equivalent
prior to installation.
If the gears are replaced, bearings
must be replaced also.
a. With metal side up press new lip seal (17) in
shaft end cover (16) using suitable press and lip
a. Examine roller bearings (6) for spalling and
If replacement is necessary, pull
is fully seated in bore.
bearings with a bearing puller.
b. Install seal retainer (19) in shaft end cover (16).
b. If bearings have been removed, deburr bearing
bores. Clean all parts in a suitable solvent and
c. Install spacer bearing (20) and retaining ring (18)
dry them with compressed air.
in shaft end cover (16).
c. Bearings should fit into bore with a light press fit,
d. Using a press install outboard bearing (21) into
however, a neat hand fit is allowable. If the
shaft end cover.
bearings tend to fall from bore, bore is probably
e. Install snap ring (22) into shaft end cover groove
to retain outboard bearing.
4. INSTALL RING SEALS (8) IF REMOVED.
When securing the motor in a vise,
do not grip on or near the machined
The notch in ring seal (8) must be
visible to ensure notched side is next
1. IF REMOVED, INSTALL PLUG (15) IN SHAFT END
HOUSING (16). TORQUE PLUG TO 240 IN-LBS
a. Install new ring seals (8) into bottom of integral
shaft and gear bearing bore on both shaft end
cover (16) and port end cover (4).
2. IF REMOVED, INSTALL CHECK ASSEMBLIES (7)
IN SHAFT END COVER (16) USING CHECK