CYLINDER HEAD & VALVES - CONT - TM-5-3820-256-24-5

CYLINDER HEAD & VALVES - CONT - TM-5-3820-256-24-5_207

CYLINDER HEAD & VALVES - CONT - TM-5-3820-256-24-5_209

TM-5-3820-256-24-5 Drilling System Well Rotary Truck Mounted Air Transportable 600 Feet Capacity Model LP-12 NSN 3820-01-246-4276 Manual
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SERVICE MANUAL CYLINDER HEAD & VALVES Section 3 Adjust Valve Lash as Follows: 1. Remove the valve cover. Turn the crankshaft until the number one piston is on the compression stroke and the timing pointer on the front cover is in line with the TDC mark (pin) on vibration damper or flywheel (as shown in Fig. 37). Figure 37. - Timing Marks on Flywheel NOTE: Be sure that the number one piston is on the compression stroke by turning both push rods by hand to determine that both valves are closed. Valves are closed when push rods are loose and can be turned easily. 2. Six valves are adjusted when the No. 1 piston is at TDC (compression) and the remaining six are adjusted when the No. 6 piston is at TDC (compression). As depicted in Fig. 38 odd numbered valves are intake valves; and even numbered valves are exhaust valves. 3. Valve tappet clearance (lash) is specified in Valve Lash Adjustment Chart (located in this section). NOTE: When tightening head bolts, place a .005" feeler gauge between the outside brackets and the rocker levers to prevent binding. 4. Replace the valve cover (see INSTALLATION in this Section). CGES-185-3 PRINTED IN UNITED STATES OF AMERICA Page 28

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