TM 1-1520-238-23
7-353
7.91.
UTILITY HYDRAULIC ACCUMULATOR APU START CHECK VALVE REPLACEMENT
(AVIM)
7.91.1. Description
This task covers:
Removal. Cleaning. Inspection. Installation.
7.91.2. Initial Setup
Tools:
Hydraulic tool kit (item 384, App H)
Light duty laboratory apron (item 27, App H)
Industrial faceshield (item 129, App H)
Chemical protective gloves (item 154, App H)
5/8-inch hexagon x 1/2-inch drive screwdriver socket
wrench attachment (item 326, App H)
0 - 600 inch-pound 3/8-inch drive dial indicator torque
wrench (item 447, App H)
Materials/Parts:
Packing (5)
Cloth (item 52, App F)
Hydraulic fluid (item 92, App F)
Wire (item 226, App F)
Personnel Required:
68H
Aircraft Pneudraulics Repairer
67R3F
Attack Helicopter Repairer/Technical
Inspector
7.91.3. Removal
a. Remove accumulator APU start check valve
plug (1) from manifold (2).
(1) Remove lockwire from plug (1).
(2) Remove plug (1) from manifold (2). Use
hexagon screwdriver.
(3) Remove packing (3) and two retainers (4)
from plug (1).
(4) Discard packing (3).
b. Remove accumulator APU start check valve
assembly (5) from manifold (2).
(1) Remove check valve (5) with packing (6) and
two retainers (7).
(2) Discard packing (6).
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