TM-9-2350-311-34-2

CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS HOWITZER, MEDIUM, SELF-PROPELLED, 155MM

TECHNICAL MANUAL; DIRECT AND GENERAL SUPPORT MAINTENANCE MANUAL

SEPTEMBER 1994

TM-9-2350-311-34-2 - Page 339 of 552

TM 9-2350-311-34-2

6-15 SHUTTLE VALVE ASSEMBLY

This task covers:

a. Disassembly

b. Inspection

c. Assembly

INITIAL STEUP

Tools

Materials/Parts

Artillery and turret mechanic’s tool kit

Preformed packings (2) (item 51, Appx E)

(SC 5180-95-CL-A12)

Equipment Condition

No. 4-40 machine screws (2) (item 16, Appx F)

Shuttle valve assembly removed (para 6-14)

a. Disassembly

1

Remove two spool plugs (1) by screwing a No. 4-40 machine screw (2) into each spool plug (1) and pulling

out of spool (3).

2

Remove and discard two preformed packings (4).

3

Remove spool (3) from body assembly (5).

b. Inspection

1

Inspect two spool plugs (1). Replace shuttle valve assembly (6) if spool plugs are cracked, distorted, or out-

side diameter is less than 0.434 inch (11 mm).

2

Inspect spool (3). Replace shuttle valve assembly (6) if spool is scratched, cracked, or outside diameter is

less than 0.317 inch (8 mm).

3

Inspect body assembly (5). Replace shuttle valve assembly (6) if body assembly is cracked, distorted, or

damaged, or if fit of spool (3) in hole is greater than 0.005 inch (0.127 mm).

c. Assembly

1

Install spool (3) in body assembly (5).

2

Install two new preformed packings (4) on two spool plugs (1).

3

Install two spool plugs (1) in body assembly (5), being careful not to cut preformed packings (4).

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