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

CYLINDER HEAD & VALVES - CONT - TM-5-3820-256-24-5_185

CYLINDER HEAD & VALVES - CONT - TM-5-3820-256-24-5_187

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 INJECTOR CRAB The new style injector crab provides an improved injector crab seating contact area resulting from the following changes: 1. Increased through hole diameter from 0.344 in. on the displaced style injector crab to 0.375 in. on the new style injector crab (Refer to Figures 8A and 8B). Figure 8A. - Through Hole Diameter Figure 8B. - Through Hole Diameter NEW CYLINDER HEAD BOLT AND TORQUE Revised long and short cylinder head bolts with flange type heads (Figure 9a) have replaced the old style cylinder head bolts (Figure 9b) which required the use of a hardened washer (I H Part No. 252 018 R 1). Use of the new style flange type long and short cylinder head bolts results in the following changes: New Style Cylinder Old Style Cylinder Head Bolt Head Bolt (IH P/N 691 475 C1 (IH P/N 676 119 C1 - Long) - Long) (IH P/N 691 476 C1 (IH P/N 676 120 C1 - Short) - Short) 1. Washer NOT 1. Washer Required. Required 2. Final Torque 2. Final Torque 225 N•m (165 225 N-m (165 Ibf-ft) Ibf-ft) IMPORTANT: Do not intermix old and new style cylinder head bolts. Figure 9a. - "New Style" Cylinder Head Bolt (Flange type) (Washer not required Figure 9b. - "Old Style" Cylinder Head Bolt and Hardened Washer PARTS AFFECTED: New IH Part No. Description 691 475 C1 Long Cylinder Head Bolt 691 476 C1 Short Cylinder Head Bolt HARDENED Washer Displaced IH Part No. 676 119 C1676 120 C1252 018 R1 EFFECTIVE ON: The following engines utilize the "new style" long and short cylinder head bolts with flange head: CGES-185-3 PRINTED IN UNITED STATES OF AMERICA Page 6

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