TM 10-4930-351-14
0083 00
PILOT VALVE CLEANING, INSPECTION AND REPAIR (Refer to figure 4.)
INITIAL SET-UP:
Materials/Parts Required:
Tools:
None
Wiping Rag (WP 0116 00, Item 21)
1.
Wash all metal parts in a hot, mild commercially available soap and water solution. Dry parts with wiping rag.
2.
Inspect bellows assembly (12) for cracks or breaks.
3.
Inspect for burred valve stem (8) or damaged valve stem threads.
4.
Replace all damaged parts.
PILOT VALVE ASSEMBLY AND INSTALLATION (Refer to figure 4.)
INITIAL SET-UP:
Tools:
Materials/Parts Required:
Tool Kit, General Mechanic Automotive
Silicone Compound (WP 0116, Item 12)
(WP 0113 00, Item 1)
Seal (WP 0117, Item 68)
Retaining Ring (WP 0117, Item 82)
O-Ring (WP 0117 00, Item 100)
O-Ring (WP 0117 00, Item 108)
1.
Install valve guide (17) and retaining ring (16) on valve stem (8).
2.
Grasp the unthreaded end of valve stem (8), place threaded end in bellows assembly (12), and turn valve stem clockwise
to install valve stem through bellows assembly.
3.
Install seal (15) and O-rings (13 and 14) coated with silicone compound.
4.
Screw nut (7) on valve stem (8) until approximately one half of valve stem threads are through nut.
5.
Place bellows assembly (12) against housing body (2), aligning holes in bellows assembly (12) with holes in housing
body.
6.
Install three screws (11) through bellows assembly (12) into housing assembly. Tighten screws securely.
7.
Place two housing bodies (2 and 3) together, align holes in bodies, and install four screws (5 and 6) and nuts (4).
Torque nuts to 20 foot-pounds (2.77 m-kg).
8.
Test and adjust pilot valve in accordance with procedures in pilot valve test and pilot valve adjustment paragraphs.
0083 00-12
