TM 1-1520-238-23
7-217
7.51.
SERVOCYLINDER CONTROL SOLENOID VALVE REPLACEMENT
7.51.1. Description
This task covers:
Removal. Cleaning. Inspection. Installation.
7.51.2. Initial Setup
Tools:
Aircraft mechanic’s tool kit (item 376, App H)
Light duty laboratory apron (item 27, App H)
Industrial faceshield (item 129, App H)
Chemical protective gloves (item 154, App H)
5/32-inch hexagon x 1/4-inch drive screwdriver socket
wrench attachment (item 324, App H)
0 - 30 inch-pound 1/4-inch drive dial indicator torque
wrench (item 445, App H)
Materials/Parts:
Packing (3)
Hydraulic fluid (item 92, App F)
Personnel Required:
67R
Attack Helicopter Repairer
67R3F
Attack Helicopter Repairer/Technical
Inspector
References:
TM 1-1520-238-T
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
2.2
Access fairings L540 and L546 removed (di-
rectional servocylinder only)
Access panel R200 removed (collective and
longitudinal servocylinders only)
Access panel L200 removed (lateral servo-
cylinder only)
7.3
Primary hydraulic system vented
7.57
Utility hydraulic system vented
NOTE
This task is typical for the SAS solenoid valve and BUCS solenoid valve on the lateral, longitudinal,
collective, and directional servocylinders. Valves differ only in their locations.
GO TO NEXT PAGE
