TM 1-1520-238-23
6-390
Change 1
6.89.
MAIN TRANSMISSION HYDRAULIC PUMP SEAL REPLACEMENT – continued
WARNING
FLIGHT SAFETY PART
The main transmission is a flight safe-
ty part. Failure to follow maintenance
instructions may result in serious
injury or death of crewmembers
and/or serious damage to the
helicopter.
NOTE
This task is typical for either primary or
utility pump seals.
6.89.3. Removal
a. Remove and discard hydraulic pump seal (1)
from transmission (2). Use seal removal/instal-
lation tool (Figure D-461, App D).
(1) Insert removal tool in seal (1). Use seal re-
moval/installation tool (Figure D-461, App D).
(2) Insert slide hammer in removal tool. Use seal
removal/installation tool (Figure D-461,
App D).
(3) Slide hammer aft contacting bolt head remov-
ing seal (1) from transmission (2).
(4) Discard seal (1).
6.89.4. Cleaning
a. Wipe removed and attaching parts with a
clean rag.
6.89.5. Inspection
a. Check attachment area of seal for cracks.
None allowed.
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