TM 1-1520-238-23
1-119
1.37.
UTILITY HYDRAULIC RETURN ACCUMULATOR SERVICING – NITROGEN
1.37.1. Description
This task covers:
Servicing.
1.37.2. Initial Setup
Tools:
Aircraft mechanic’s tool kit (item 376, App H)
Tire inflator assembly (item 364, App H)
Nitrogen hand truck (item 398, App H)
30 - 150 inch-pound 1/4-inch drive click type torque
wrench (item 435, App H)
Materials/Parts:
Wire (item 226, App F)
Personnel Required:
67R
Attack Helicopter Repairer
67R3F
Attack Helicopter Repairer/Technical
Inspector
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
2.2
Access fairing L175 removed
1.37.3. Servicing
WARNING
The utility hydraulic accumulator con-
tains high pressure nitrogen. Open
and close valve carefully to prevent
possible injury from sudden blast. If
injury occurs, seek medical aid.
a. Vent utility hydraulic pressure (para 7.57).
b. Connect nitrogen truck and inflator kit service
hose (1) to valve (2).
(1) Remove cap (3) from valve (2).
(2) Remove lockwire from valve (2).
(3) Hold valve (2). Install quick-disconnect adapt-
er (4) and service hose (1) on valve (2).
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