WASHER 7D7603 - Caterpillar

Valve Guides
The tools needed to remove and install valve guides are the 9U-6895 Valve Guide Driver and 9U-6894 Guide Collar. The counterbore in the driver bushing installs the guide to the correct height. Use a 1P-7451 Valve Guide Honing Group to make a finished bore in the valve guide after installation of the guide in the head. Special Instruction, Special Instruction, SMHS7526 gives an explanation for this procedure. Grind the valves after the new valve guides are installed. Valve Guide Bore
Illustration 8 g00580855
Valve Guide Gauge
Use the 5P-3536 Valve Guide Gauge Group in order to check the bore of the valve guides. Refer to Special Instruction, GMG02562 for complete instructions on the 5P-3536 Valve Guide Gauge Group.Bridge Dowel
Use a 5P-0944 Dowel Puller Group with a 5P-0942 Dowel Extractor to remove the bridge dowels. Install a new bridge dowel with a 5P-2406 Dowel Driver. This dowel driver installs the bridge dowel to the correct height.Bridge Adjustment
When the head is disassembled, keep the bridges with the respective cylinders. Adjustment of the bridge will be necessary after the valves are ground or other reconditioning of the cylinder head is performed. The bridge should be checked and/or adjusted each time the valves are adjusted. Use the procedure that follows to adjust the bridge. Note: Fully close the valves.
Put engine oil on the bridge dowel in the cylinder head and in the bore in the bridge.
Install the bridge with the adjustment screw toward the exhaust manifold.
Loosen the locknut for the adjustment screw. Loosen the adjustment screw.
Put a force on the bridge with a finger. Keep the bridge in contact with the valve stem that is opposite to the adjustment screw.
Illustration 9 g00580860
Typical Example Of Bridge Adjustment
Turn the adjustment screw clockwise until contact is made with the valve stem. Turn the adjustment screw in the clockwise direction. ... 30 degreesThis adjustment will make the bridge straight on the dowel and also compensate for the clearance in the threads of the adjustment screw.
Hold the adjustment screw in position and tighten the locknut to a torque of 28 4 N m (21 3 lb ft).
Put engine oil at the point of contact between the rocker arm and the bridge. Valve Clearance Setting
Note: Valve clearance is measured between the rocker arm and the bridge for the valves.Note: If the valve clearance is adjusted, the bridge must be checked.
Table 3
Setting For The Clearance Of The Valves
Exhaust 0.76 0.10 mm (0.03 0.004 inch)
Intake 0.38 0.10 mm (0.015 0.004 inch)
Illustration 10 g00580863
Valve Adjustment
Illustration 11 g00274783
Cylinder And Valve Location
To adjust the valve clearance, turn the adjustment screw in the rocker arm. Valve clearance adjustments can be made by using the procedure that follows:
Put the No. 1 piston at the piston top center position on the compression stroke. Refer to Fuel System, "Finding Top Center Compression Position For No. 1 Piston" for additional information.
Loosen the locknut for the adjustment screw on the pushrod. Turn the screw counterclockwise in order to increase