BOLT 7X0377 - Caterpillar

(1) Bore in rocker arm for shaft (new) ... 24.803 0.013 mm (.9765 .0005 in.)(2) Put 2P2506 Thread Lubricant on the threads of all bolts that hold rocker arms shaft and tighten the bolts in the step sequence that follows: Step 1.Tighten bolts in number sequence shown to ... 270 25 N m (200 20 lb.ft.) Step 2. Tighten bolts in number sequence shown to ... 447 20 N m (330 15 lb.ft.) Step 3. Tighten bolts in number sequence shown again to ... 447 20 N m (330 15 lb.ft.) (3) Torque for locknut for valve adjustment screw ... 28 4 N m (22 3 lb. ft.)(4) Torque for locknut for bridge adjustment screw ... 28 4 N m (22 3 lb. ft.)(5) Clearance for valves: Intake valves ... 0.38 mm (.015 in.)Exhaust valves ... 0.76 mm (.030 in.)(6) Height to top of dowel ... 53.3 0.5 mm (2.10 .02 in.)(7) Diameter of dowel (new) ... 11.008 0.003 mm (.4334 .0001 in.) Bore in bridge for dowel (new) ... 11.15 0.05 mm (.438 .002 in.) Bore in head for dowel ... 10.968 0.020 mm (.4318 .0008 in.) (8) Diameter of valve lifter (new) ... 27.8956 0.0127 mm (1.09825 .00050 in.) Bore in block for valve lifter (new) ... 27.9527 0.0190 mm (1.10050 .00075 in.) (9) Guide springs must not be used again. Always install new guide springs. (10) 2N7229 Spring: Length under test force ... 74.2 mm (2.92 in.)Test force ... 45 to 53 N (10 to 12 lb.) Free length after test ... 114.3 mm (4.50 in.)Outside diameter ... 29.7 mm (1.17 in.)(11) Dowel length above top surface of rocker shaft support to be (both ends) ... 12.7 1.0 mm (.50 .04 in.)(12) Clearance for rocker arms (both ends) ... 0.30 to 1.40 mm (.012 to .055 in.) (13) Use 2N7228 Washer as needed to get clearance (12).
SEQUENCE FOR ROCKER ARM BOLTS (3412)
SEQUENCE FOR ROCKER ARM BOLTS (3408)