TM-9-2320-260-34-1

TRUCK, 5-TON, 6X6, M809 SERIES (DIESEL)

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE; VOLUME 1 OF 2

JULY 1994

TM-9-2320-260-34-1 - Page 269 of 657

TM 9-2320-260-34-1

3-77. INTAKE AND EXHAUST VALVES REFACING

THIS TASK, COVERS:

a. Valve Specifications

c. Cleaning After Refacing

b. Grinding or Refacing Valves

INITIAL SETUP

APPLICABLE MODELS

REFERENCES (TM)

All

TM 9-2320-260-34 P-1

TM 9-4910-484-10

TOOLS

General mechanic’s tool kit

EQUIPMENT CONDITION

(Appendix B, Item 1)

Intake and/or exhaust valve(s) removed (para. 3-51).

Valve refacer (Appendix B, Item 41)

Outside micrometer (Appendix B, Item 8)

a. Valve Specifications

Inspect intake and exhaust valves (1). Refer to table 3-4, Valve Specifications, for limits. If rim thickness

is 0.0591 in. (1.501 mm) or greater, intake and/or exhaust valve(s) can be resurfaced.

Table 3-4. Valve Specifications.

WEAR LIMITS/TOLERANCES

POINT OF MEASUREMENT

ENGLISH

METRIC

Stem

0.449-0.4510 in.

11.40-11.46 mm

Seat angle

Intake

30°

Exhaust

45°

Refacing depth

0.0591 in.

1.501 mm

Valve head thickness

0.105 in.

2.67 mm

3-217