ROD 2Y6049 - Caterpillar

(1) Bore in rocker arm for shaft ... 24.803 0.013 mm (.9765 .0005 in.) Diameter of rocker arm shaft ... 24.752 0.013 mm (.9745 .0005 in.)(2) Put 5P3931 Anti-Seize Compound on all the threads of bolts that hold rocker arm shafts and tighten the bolts in the step sequence that follows: 1. Tighten bolts from 1 through 6 in number sequence to ... 270 27 N m (200 20 lb.ft.) 2. Tighten bolts from 1 through 6 in number sequence to ... 450 20 N m (330 15 lb.ft.)3. Tighten bolts from 1 through 6 in number sequence again to ... 450 20 N m (330 15 lb.ft.)(3) Torque for locknut for valve adjustment screw ... 30 4 N m (22 3 lb.ft.)(4) Torque for locknut for bridge adjustment screw ... 30 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 ... 11.008 0.003 mm (.4334 .0001 in.) Bore in bridge for dowel ... 11.13 0.05 mm (.438 .002 in.)Bore in head for dowel ... 10.968 0.020 mm (.4318 .0008 in.)(8) Diameter of valve lifter ... 27.896 0.013 mm (1.0983 .0005 in.) Bore in block for valve lifter ... 27.953 0.019 mm (1.1005 .0008 in.) See GUIDELINE FOR REUSABLE PARTS; SALVAGE OF LIFTER BORES IN 3400 ENGINES, Form No. SEBF8069 for the procedure, tooling and specifications needed to install 4W4588 Sleeves for salvage of the lifter bores in the cylinder block.(9) Guide springs. See GUIDELINE FOR REUSABLE PARTS, Form No. SEBF8066 for more information on using guide springs again. (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 ... 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).