HALE AP, Technical Manual

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144
Pump Gear Installation
NOTE
The pump gear (ONLY 3.74, 2.91, 2.60, and 2.33:1 gear ratios) will pass thru the
gearbox bore when the pump shaft assembly is installed. All other ratio pump gears
will NOT pass thru the bore of the gearbox housing and must be installed from the
top of the gearbox with the cover and cooling tube removed.
A. Install pump gear.
DO NOT ALLOW PUMP GEAR TO SLIDE THRU SUPPORTS. DO NOT ALLOW THE NEW
OIL SEAL TO BE CUT ON THE KEYWAY OR PINCHED BETWEEN THE ADJACENT PUMP
SHAFT COMPONENTS OR BE DAMAGED IN ANY OTHER WAY. DAMAGING THE OIL
SEAL WILL RESULT IN AN OIL LEAK AND POSSIBLE EQUIPMENT DAMAGE AND/OR
FAILURE.
For ONLY 3.74, 2.91, 2.60, and 2.33:1 gear ratio pumps: 1.
a) Push pump gear on to pump shaft until seated against spacer.
b) Noting notch orientation, push spacer on to pump shaft until seated against gear.
For all other GR pumps: 2.
a) Place pump gear in gearbox from open top.
b) Align pump gear with drive gear teeth and gearbox pump shaft bores.
B. Install pump shaft assembly.
For all EXCEPT 3.74:1 gear ratio pumps, install drive side bearing retain- 1.
ing ring in gearbox.
a)
Using snap ring pliers, insert tips of pliers into holes in a new retaining ring.
(NOTE: Refer to paragraph 5.7.5 for proper ring orientation.)
b) Fully compress ring.
c) Push retaining ring into gearbox until aligned with snap ring groove.
d) Release and remove snap ring pliers.
e) Verify retaining ring seats in groove.
Place gearbox on its side. (This position allows access to both sides of the 2.
gearbox.)
Install pump shaft assembly as follows. 3.
a) Pass drive side of pump shaft thru pump side bearing bore and into gearbox.
b) For ONLY 1.90, 1.64, 1.31 and 1.14:1 gear ratio pumps, slide pump shaft thru
pump gear as follows.
i. Align pump shaft and pump gear key with pump gear bore and keyway. Then
push pump shaft thru pump gear.
ii. Verify alignment of pump gear and drive gear teeth.
Seat pump side bearing in gearbox pump side bearing bore. 4.
a) Using gear oil, lubricate pump side bearing outer race and gearbox housing bore.