SHAFT AS-DRIVE 1249437 - Caterpillar

Illustration 1 g02711856
Table 1
Specification for 220-3745 Valve Mechanism Gp
Item Qty Part Specification Description
A - - Valve lash for 212-0932 Inlet Valve is 0.38 0.10 mm (0.015 0.004 inch).
Valve lash for 212-0933 Exhaust Valve is 1.02 0.10 mm (0.040 0.004 inch).
1 12 9L-7712 Nut Torque to 30 4 N m (266 35 lb in).
Tighten the nut after you set the valve lash.
B 1 104-4212 Rocker Arm As Bore in the rocker arm for the rocker arm shaft is 24.803 mm (0.9765 inch).
2 12 9L-7712 Nut Torque to 30 4 N m (266 35 lb in).
C - - Height to top of the dowel is 53.3 0.8 mm (2.10 0.03 inch).
D 12 2N-5775 Dowel Diameter of new dowel is 11.008 0.003 mm (0.4334 0.0001 inch).
Bore in valve bridge assembly for dowel is 11.13 mm (0.438 inch).
Bore in cylinder head for dowel is 10.968 0.020 mm (0.4318 0.0008 inch).
3 24 305-6843 Guide Spring The guide spring must not be used again. Always install new guide springs.
E 1 4P-8258 Lifter Body Diameter of new lifter body is 27.896 0.013 mm (1.0983 0.0005 inch).
Diameter of the valve lifter bore that is in the cylinder block is 27.9527 0.0190 mm (1.10050 0.00075 inch).
Lubricate the bore in the cylinder block for the 105-5139 Valve Lifter As with the 50/50 mixture of clean engine oil and 8T-2998 Lubricant before installation.
Illustration 2 g02711857
Table 2
Specification for 220-3745 Valve Mechanism Gp
Item Qty Part Specification Description
F 1 4N-1109 Rocker Arm Shaft Diameter of new rocker arm shaft is 24.752 0.013 mm (0.9745 0.0005 inch).
G 2 4N-0955 Dowel Protrusion of the dowel above the top surface of the shaft bracket is 10.0 1.0 mm (0.40 0.04 inch).
H 2 2N-7228 Washer Use the required number of washers (5) in order to obtain the end play of 0.30 to 1.40 mm (0.012 to 0.055 inch) for the rocker arm shaft.
4 2 2N-7229 Spring Length under test force is 74.17 mm (2.920 inch).
Test force is 44.5 to 53.4 N (10.0 to 12.0 lb).
Free length after test is 114.3 mm (4.50 inch).