TM-9-2320-273-34

TRUCK TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

DECEMBER 1980

TM-9-2320-273-34 - Page 563 of 801

TM9-2320-273-34

(c) Insert the valve seat in lapping block (fig. 14-14).

Figure 14-14. Lapping Valve and Valve Seats.

(d) Using a standard hand valve lapper and rubber suction cup, lap the valve until a good

seat is acquired. Add additional lapping compound as necessary.

(e) The valve must be flat within 0.001 in. (0.025 mm) total indicator reading.

(f) Clean parts thoroughly to remove all lapping compound.

(6) Lapping Intake Valve.

(a) Install a rubber buffer in top of the exhaust valve seat.

(b) Apply bluing to the intake valve. Allow to dry.

(c) Apply lapping compound to the intake valve.

Place the intake valve seat on the intake

valve and lap until a good seat is acquired. Valve must be flat within 0.001 in. (0.025 mm) of total

indicator reading.

(d) Remove all lapping compound before assembly.

14-16