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

CYLINDER HEAD & VALVES - CONT - TM-5-3820-256-24-5_203

CYLINDER HEAD & VALVES - CONT - TM-5-3820-256-24-5_205

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 Figure 30. - Valve Seat and Insert Counterbore Radii d. Install valve seat inserts as follows: 1. Chill valve seat inserts and driver tool in dry ice or Liquid Freon for one-half hour before installing. NOTE: Chilling will prevent metal scraping at counterbore, ensuring maximum contact of mating surfaces. 2. Align insert to avoid cocking. 3. Press insert into cylinder head using an arbor press and insert driver as shown in Fig. 31. Exert an even pressure of 2225 N•m (500 Ibf-ft) for five (5) seconds to assure proper seating. Figure 31. - Installing Insert 4. Properly seated, insert should be recessed into head as shown in Fig. 32. Figure 32. - Insert Properly Installed Inspect Valve Springs as follows: 1. Clean all valve springs and valve spring seats in a suitable solvent. 2. Examine springs and seats for rust, pitting and cracks. 3. Test valve spring tension using a spring test loader (see Tool List for tool number) as follows: CGES-185-3 PRINTED IN UNITED STATES OF AMERICA Page 24

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