SLACK ADJUSTER GP 8X7921 - Caterpillar

(1) Bore in rocker arm for shaft (new) ... .9765 .0005 in.(24.803 0.013 mm)(2) Put engine oil on all the threads of bolts that hold rocker arms shaft and tighten the bolts in the following step sequence: 1. Tighten bolts from 1 to 6 in number sequence to ... 200 20 lb. ft.(270 27 N m)2. Tighten bolts from 1 to 6 in number sequence to ... 330 15 lb. ft.(450 20 N m)3. Tighten bolts from 1 to 6 in number sequence again to ... 330 15 lb. ft.(450 20 N m)(3) Torque for locknut for valve adjustment screw ... 22 3 lb. ft.(28 4 N m)(4) Torque for locknut for bridge adjustment screw ... 22 3 lb. ft.(28 4 N m)(5) Clearance for valves: Intake valves ... .015 in.(0.38 mm)Exhaust valves ... .030 in.(0.76 mm)(6) Height to top of dowel ... 2.10 .02 in.(53.3 0.5 mm)(7) Diameter of dowel (new) ... .4334 .0001 in.(11.008 0.003 mm) Bore in bridge for dowel (new) ... .4350 .0012 in.(11.049 0.030 mm)Bore in head for dowel ... .4322 .0008 in.(10.978 0.020 mm)(8) Diameter of valve lifter (new) ... 1.09850 .00025 in.(27.9019 0.0064 mm) Bore in block for valve lifter (new) ... 1.1005 .0008 in.(27.953 0.019 mm)(9) Guide springs must not be used again. Always install new guide springs.(10) 2N7229 Spring: Length under test force ... 2.92 in.(74.2 mm)Test force ... 10 to 12 lb.(45 to 53 N)Free length after test ... 4.50 in.(114.3 mm)Outside diameter ... 1.17 in.(29.7 mm)(11) Dowel length above top surface of rocker shaft support to be ... .50 .04 in.(12.7 1.0 mm)(12) Clearance for rocker arms (both ends) ... .012 to .055 in.(0.30 to 1.40 mm)(13) Use 2N7228 Washer as needed to get clearance (12).(14) Torque for 26 bolts ... 120 24 lb. in.(13.6 2.8 N m)