Producto:
EXCAVATOR
Modelo: 330C L EXCAVATOR CYA
Configuración: 330C L Excavator CYA00001-UP (MACHINE)
POWERED BY C-9 Engine
Pruebas y Ajustes
C-9 Engine for Caterpillar Built Machines
Número de medio -SENR9501-06Fecha de publicación -01/03/2003 Fecha de actualización -14/03/2003
i02182207
Engine Valve Lash - Inspect/Adjust
SMCS - 1102-025
To prevent possible injury, do not use the starter to turn the flywheel.
Hot engine components can cause burns. Allow additional time for the
engine to cool before measuring valve clearance.
This engine uses high voltage to control the fuel injectors.
Disconnect electronic fuel injector enable circuit connector to prevent
personal injury.
Do not come in contact with the fuel injector terminals while the engine
is running.
Note: Valve lash is measured between the rocker arm and the valve bridge. All
measurements and adjustments must be made with the engine stopped and the valves fully
closed.
Valve Lash Check
An adjustment is NOT NECESSARY if the measurement of the valve lash is in the
acceptable range in Table 1.
Prior to checking the valve lash, put the No. 1 piston at the top center position on the
compression stroke. Refer to Testing and Adjusting, "Finding Top Center Position for No.
1 Piston".
Table 1
Inlet Valves Exhaust Valves
Valve Lash Check (Stopped
0.38 ± 0.08 mm (0.015 ± 0.64 ± 0.08 mm (0.025 ±
Engine)
0.003 inch) 0.003 inch)
TC Compression Stroke 1-2-4 1-3-5
TC Exhaust Stroke (1) 3-5-6 2-4-6
Firing Order 1-5-3-6-2-4 (2)
( 1 )
360° from TC compression stroke
( 2 )
The No. 1 cylinder is at the front of the engine.
If the measurement is not within this range, an adjustment is necessary. Refer to "Valve
Lash Adjustment" for the proper procedure.
Valve Lash Adjustment
g01101255
Illustration 1
Cylinder and valve location
(A) Exhaust valves
(B) Inlet valves
Use the following procedure to adjust the valve lash:
1. Put the No. 1 piston at the top center position on the compression stroke. Refer to
Testing and Adjusting, "Finding Top Center Position for No. 1 Piston".
Table 2
TC Compression
Inlet Valves Exhaust Valves
Stroke
Valve Lash 0.38 ± 0.08 mm (0.015 ± 0.64 ± 0.08 mm (0.025 ±
0.003 inch) 0.003 inch)
Cylinders 1-2-4 1-3-5
g01104149
Illustration 2
Adjustment of the valves
(1) Inlet rocker arm
(2) Adjustment locknut
(3) Exhaust valve rocker arm
(4) Adjustment locknut
2. Adjust the valve lash according to Table 2.
a. Lightly tap the rocker arm at the top of the adjustment screw with a soft
mallet. This will ensure that the lifter roller seats against the camshaft's base
circle.
a. Loosen the adjustment locknut.
a. Place the appropriate feeler gauge between rocker arm and the valve bridge.
Then, turn the adjustment screw in a clockwise direction. Slide the feeler
gauge between the rocker arm and the valve bridge. Continue turning the
adjustment screw until a slight drag is felt on the feeler gauge. Remove the
feeler gauge.
a. Tighten the adjustment locknut to a torque of 30 ± 7 N·m (22 ± 5 lb ft). Do
not allow the adjustment screw to turn while you are tightening the
adjustment locknut. Recheck the valve lash after tightening the adjustment
locknut.
3. Remove the timing bolt and turn the flywheel by 360 degrees in the direction of
engine rotation. This will put the No. 6 piston at the top center position on the
compression stroke. Install the timing bolt in the flywheel.
Table 3
TC Exhaust
Inlet Valves Exhaust Valves
Stroke (3)
Valve Lash 0.38 ± 0.08 mm (0.015 ± 0.64 ± 0.08 mm (0.025 ±
0.003 inch) 0.003 inch)
Cylinders 3-5-6 2-4-6
( 3 )
Position for No. 1 cylinder
4. Adjust the valve lash according to Table 3.
a. Lightly tap the rocker arm at the top of the adjustment screw with a soft
mallet. This will ensure that the lifter roller seats against the camshaft's base
circle.
a. Loosen the adjustment locknut.
a. Place the appropriate feeler gauge between rocker arm and the valve bridge.
Then, turn the adjustment screw in a clockwise direction. Slide the feeler
gauge between the rocker arm and the valve bridge. Continue turning the
adjustment screw until a slight drag is felt on the feeler gauge. Remove the
feeler gauge.
a. Tighten the adjustment locknut to a torque of 30 ± 7 N·m (22 ± 5 lb ft). Do
not allow the adjustment screw to turn while you are tightening the
adjustment locknut. Recheck the valve lash after tightening the adjustment
locknut.
5. Remove the timing bolt from the flywheel after all adjustments to the valve lash
have been made. Reinstall the timing cover.¿
