HALE AP, Technical Manual

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141
NOTES
The endcap is NOT serviceable after removal.
If a heavy enough tool is NOT available, using a hammer drive a long thin chisel into
the endcap, then use a short length of steel rod as a fulcrum and pry (the hammer
may again be used) the endcap out of the gearbox.
B. Discard endcap.
Pump Shaft Endcap Installation
A. Install in pump shaft endcap.
Apply Loctite 680 (or equivalent) to mating surfaces of new pump shaft 1.
endcap.
Place new pump shaft endcap over gearbox opening with smooth part of 2.
cap facing outward.
Using non-marring hammer and seal driver, drive pump shaft endcap 3.
flush with gearbox.
B. Perform Gearbox Oil Level Check. (Refer to paragraph 4.3.2.)
This procedure may have required the removal of the pump from the gearbox; if so use the instal-
lation portion of paragraph 5.9.1 (on page 118) for instructions to reassemble the gearbox and
pump assemblies (unit) and paragraph 5.8.8 (on page 117) to install the unit can on the appa-
ratus after this bench procedure is completed.
5.9.2.2.3
Pump Gear (ONLY)
The pump gear is located on the pump shaft inside the gearbox. The input shaft via the drive
gear mating with the pump gear turns the pump shaft. The pump shaft turns faster than the in-
put shaft, how much faster depends on the gear ratio selected when the pump was designed/
manufactured. The Flex series gearbox design requires gearbox cover removal for GR 1.14, 1.31,
1.64, and 1.90:1 since the pump gear diameter exceeds the pump shaft bearing bore preventing
pump gear removal via the bore.
This procedure requires unit removal from the apparatus followed by pump removal from the
gearbox prior to performance to provide pump gear and/or pump shaft access. See para-
graph 5.9.2 (on page 120) for reference to the required Removal From The Apparatus and Gear-
box R&R procedures.
Performing the removal portion of this procedure places a lot of stress on the pump shaft bear-
ings, requiring their replacement. Additionally, pump shaft installation always requires all associ-
ated gaskets, O-rings, seals, snap rings, and endcap replacement. If the pump gear requires R&R
the drive gear requires close inspection to check for possible damage requiring drive gear R&R.
Inspect for damaged and/or worn teeth, indications of overheating, stress cracking, etc.
NOTES
For this procedure, reuse the existing pump shaft (if serviceable) and the gearbox
cover (if serviceable).
Do NOT reuse bearings, gaskets, gear oil, mechanical (pump) seal, O-rings, oil seals,
and retaining rings.