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MAIN ROTOR SWASHPLATE SHOULDER PIN REPLACEMENT – continued | Up
TM-1-1520-238-23-7-1 Helicopter Attack AH-64A Apache (NSN 1520-01-106-9519) (EIC: RHA) Manual | Next
MAIN ROTOR SWASHPLATE SHOULDER PIN REPLACEMENT – continued |
TM 1-1520-238-23
Change 8
11-61
11.8.
MAIN ROTOR SWASHPLATE SHOULDER PIN REPLACEMENT – continued
d. Measure diameter of pin mating bore in
swashplate. Diameter shall not exceed 0.8135
INCH. Use caliper. Replace swashplate if mea-
surement exceeds limits.
11.8.6. Installation
WARNING
·A heater can cause severe burns.
Do not allow heater to contact skin.
Wear protective equipment. If injury
occurs, seek medical aid.
·Handling frozen items presents a
serious low temperature burn po-
tential. Temperature resistant
gloves are required.
a. Install shoulder pin (1) in swashplate (2).
Torque nut (4) 55 to 66 FOOT-POUNDS.
(1) Freeze shoulder pin (1) in freezer at 0 °F (-18
°C) or below for 3 hours or use carbon dioxide
(item 40, App F).
(2) Heat swashplate pin orifice area to 200 °F
(93.3 °C). Use heater and pyrometer and
thermocouple tester.
(3) Install shoulder pin (1) in swashplate (2). Use
hydraulic press.
(4) Install two washers (5) and nut (4) on shoul-
der pin (1).
(5) Torque nut (4) to 55 FOOT-POUNDS. Use
torque wrench.
(6) Increase torque to aline cotter pin hole, but do
not exceed 66 FOOT-POUNDS.
(7) Install new cotter pin (3).
(8) Apply sealing compound around nut (4) and
washer(s) (5). Use sealing compound
(item 176, App F).
b. Inspect (QA).
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