CABINET-SAFETY 2619067 - Caterpillar

Valve Lash Adjustment
Use the following procedure to adjust the valves:
Put the No. 1 piston at the top center position on the compression stroke.Note: See Testing and Adjusting, "Finding The Top Center Position for No. 1 Piston" for further details.
With No. 1 piston at the top center position of the compression stroke, an adjustment can be made to half of the valves. Adjust the valves that are listed in Table 6 for this position.Before any adjustments are made, lightly tap each rocker arm at the top of the adjustment screw. Use a soft mallet to ensure that the lifter roller seats against the camshaft's base circle.
Illustration 6 g00454433
Valve Lash Adjustment (1) Valve stem. (2) Rocker arm. (3) Rocker arm adjustment screw locknut. (4) Rocker arm adjustment screw.
Loosen rocker arm adjustment screw locknut (3) . Insert an appropriate feeler gauge between the rocker arm and the valve stem. If the clearance is insufficient to insert the feeler gauge, turn rocker arm adjustment screw (4) counterclockwise in order to increase the valve lash.
Table 7
Valve Lash Adjust: Engine Stopped    
Valves     Gauge Dimension    
Inlet    
0.38 mm (0.015 inch)    
Exhaust    
0.64 mm (0.025 inch)    
With the feeler gauge between the rocker arm and the valve stem, turn the rocker arm adjustment screw in a clockwise direction. Continue turning the adjustment screw until the valve lash reaches the specification that is provided in Table 7 .
After each adjustment, tighten the rocker arm adjustment screw locknut (3) to a torque of 25 7 N m (18 5 lb ft). Then, check the adjustment again.
Remove the top center bolt, and turn the flywheel by 360 degrees in the direction of the engine's rotation. This will position the No. 1 piston at the top center on the exhaust stroke. Install the top center bolt in the flywheel.
With the No. 1 piston at the top center position on the exhaust stroke, adjustment can be made to the remaining valves. Adjust the valves that are listed in Table 6 for this position.
Repeat steps 3, 4, and 5 for these valve adjustments.
Remove the top center bolt from the flywheel after all valve lash adjustments have been made.Turbocharger
The turbocharger senses boost pressure which actuates the waste gate valve. The waste gate valve controls the amount of exhaust gas that is allowed to bypass the turbine side of the turbocharger. Regulating the amount of the exhaust gas that enters the turbocharger regulates the rpm of the turbocharger.
Illustration 7 g00295815
(1) Actuating rod. (2) Canister. (3) Line. When the engine operates in conditions of low boost (lug), a spring presses against a diaphragm in canister (2) . This moves actuating rod (1) in order to close the waste gate valve. Then, the turbocharger can operate at maximum performance.As the boost pressure increases against the diaphragm in canister (2) , the waste gate valve opens. The rpm of the turbocharger becomes limited. This limitation occurs because a portion of