TM-9-2320-272-24-4
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 4 OF 4
JUNE 1998
TM-9-2320-272-24-4 - Page 29 of 836
TM 9-2320-272-24-4
5-5. VALVE SEAT INSERTS MAINTENANCE (Contd)
Table 5-2. Valve Seat Specifications.
CYLINDER HEAD
VALVE SEAT
COUNTERBORE DEPTH
Standard
CYLINDER HEAD
INSERT
COUNTERBORE
INSERT
OUTSIDE DIAMETER
INSIDE DIAMETER
THICKNESS
2.0025 - 2.0035 in.
1.9995 - 2.0005 in.
0.278 - 0.282 in.
(50.864 - 50.889 mm)
(50.787 - 50.813 mm)
(7.0612 - 7.1629 mm)
5-23
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