TM 9-2320-272-24-4
6.
Wipe head (5) and gland (6) clean and inspect. If cracked or broken, replace head (5) or gland (6).
7.
Measure inside diameter of head (5) and gland (6). If inside diameter is not 2.010 in. (51.05 mm),
replace head (5) or gland (6).
8.
Measure free length of three bypass springs (1). If length is not 1.25 in. (31.75 mm), replace bypass
spring (1).
9.
Compress each bypass spring (1) to 0.938 in. (23.8 mm) length. If torque reading is not 10 lb&
(14 Nm), replace bypass spring (1).
Inspect three piston rings (11) for breaks. If any ring (11) is broken, replace all three rings (11).
10.
Wipe orifice plug (2) and hoist cylinder walls (4) clean and inspect. If scratched or chipped, replace
11.
orifice plug (2) or hoist cylinder walls (4).
NOTE
Both hoist cylinders are assembled in the same way. Steps 1
through 12 cover the left hoist cylinder.
1.
Install three piston rings (11) on piston grooves (10).
2.
Slide piston (9) on piston rod (8) until seated and install with slotted nut (13) and new cotter pin (12).
CAUTION
Use care when performing step 3 to prevent damage to cylinder
bore or piston.
3.
Slide piston (9) and piston rod (8) in cylinder housing (3).
4.
Install new O-ring (7) on cylinder head (5).
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