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 299 of 657

TM 9-2320-260-34-1

3-83. INJECTOR AND VALVE ADJUSTMENT (TORQUE METHOD) (Contd)

8.

9.

10.

11.

12.

13.

14.

Before checking or setting valve clearance, ensure crossheads are

adjusted (para. 3-16).

NOTE

Crossheads operate two valves with one rocker lever. Crosshead

adjustments are necessary to ensure equal operation of each valve.

Loosen locknut (4) on adjusting screw (3) of crosshead (13).

Back out adjusting screw (3) one full turn.

Using light finger pressure on rocker lever contact surface (9), hold crosshead (13) against valve

stem (11).

Turn adjusting screw (3) down until adjusting screw (3) touches valve stem (12).

Tighten locknut (4) 22-26 lb-ft (30-35 N•m.

NOTE

Ensure adjusting screw does not move when tightening locknut.

While holding adjusting screw (3) with screwdriver, tighten locknut (4) 25-30 lb-ft (34-41 NŽm).

Using feeler gage, check clearance between crosshead (13) and valve spring retainer (10). There

must be a minimum clearance of 0.020 in, (0.51 mm).

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