En este grupo En todos

Grupo de Motores diesel



Calibracion de valvulas para motor caterpillar c10

MISAEL
Maquinas de combustion interna ceu
Escrito por Misael Bustamante
el 29/09/2010

Que tal compañeros alguno de ustedes me podria facilitar informacion sobre como calibrar valvulas y freno de motor deel motor caterpillar c10 de antemano gracias

Jose Casas
Tecnico automotriz conalep
Escrito por Jose Casas
el 29/09/2010

To make an adjustment to the unit injectors on cylinders 3, 5, and 6 use the following procedure:


  1. Put the number 1 piston at the top center position on the compression stroke. Refer to Systems Operation/Testing and Adjusting, "Finding Top Center Position For No. 1 Piston".

  1. Turn the unit injector adjusting screw clockwise until contact is made with the unit injector.

  1. Turn the unit injector adjusting screw through 180 degrees in a clockwise direction.

  1. Hold the adjusting screw in this position and tighten the locknut to a torque of 55 ± 10 N·m (41. 0 ± 7. 0 lb ft).

  1. To make an adjustment to the unit injectors on cylinders 1, 2, and 4, remove the timing bolt. Turn the flywheel by 360 degrees in the direction of the engine's rotation. The engine rotates in a counterclockwise manner. This will put the number 1 piston at the top center position on the exhaust stroke.

  1. Repeat 2 through 4.

  1. Remove the timing bolt from the flywheel after all of the unit injector adjustments have been made. Reinstall the timing cover.
Jose Casas
Tecnico automotriz conalep
Escrito por Jose Casas
el 29/09/2010

Adjust the valve lash while the engine is stopped. Use the following procedure to adjust the valve lash:


  1. Put the No. 1 piston at the top center position.

    Note: If the engine is equipped with an engine compression brake, loosen the adjusting screw for the lash on the slave piston for the compression brake prior to adjusting the engine valve lash.


  2. Before any adjustments are made, 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.

    Note: Refer to Table for the appropriate engine valve lash setting.


  3. Make an adjustment to the valve lash on the inlet valves for cylinders 1, 2, and 4.
  4. Loosen adjustment locknut.
  5. 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.

  6. 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.

  7. Make an adjustment to the valve lash on the exhaust valves for cylinders 1, 3, and 5.

    1. Loosen adjustment locknut.

    1. 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.

    1. 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.

  8. 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.

  9. Before any adjustments are made, 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.

  10. Make an adjustment to the valve lash on the inlet valves 3, 5, and 6.

    1. 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.

    1. Loosen the adjustment locknut.

    1. 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.

    1. 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.

  11. Make an adjustment to the valve lash on the exhaust valves for cylinders 2, 4, and 6.

    1. Loosen adjustment locknut.

    1. 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.

    1. 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.

  12. Remove the timing bolt from the flywheel after all adjustments to the valve lash have been made. Reinstall the timing cover on the flywheel housing.
Jose Casas
Tecnico automotriz conalep
Escrito por Jose Casas
el 29/09/2010

Note: The engine valve lash must be adjusted before adjusting the slave piston lash.


Table 1 Slave Piston Lash Setting
Jake Brake Compression Brakes Serial Number Prefix Slave Piston Lash Setting
3CS1-UP
2PN1-UP
8YS1-UP

0. 64 ± 0. 08 mm (0. 025 ± 0. 003 inch)
CPD1-UP
9SM1-UP
2KS1-UP
9NS1-UP

1. 02 ± 0. 08 mm (0. 040 ± 0. 003 inch)
1YN1-UP
1. 14 ± 0. 08 mm (0. 045 ± 0. 003 inch)
MBJ1-UP
MBL1-UP

1. 40 ± 0. 08 mm (0. 055 ± 0. 003 inch)

Note: Slave piston lash is measured between the slave piston and the actuating pin that is on the exhaust valve bridge. Adjustments to the slave piston must be completed while the engine is stopped and the exhaust valves are closed.

Use the following procedure to adjust the slave piston lash on cylinders 1, 3, and 5:


  1. Put No. 1 piston at the top center position on the compression stroke.

  1. Loosen adjustment locknut.

  1. Place the appropriate feeler gauge between slave piston and screw assembly. Turn the adjustment screw in a clockwise direction. Slide the feeler gauge between the slave piston and the screw assembly. Continue turning the adjustment screw until a slight drag is felt on the feeler gauge. Remove the feeler gauge.

  1. Tighten adjustment locknut to a torque of 35 N·m (25 lb ft). Recheck the slave piston lash after tightening the locknut.

  1. Continue to check the slave piston lash for each of the cylinders that have been designated for adjustment. After each adjustment, tighten the locknut for the valve adjustment screw to a torque of 35 N·m (25 lb ft) and recheck the slave piston lash adjustment.

  1. Remove the timing bolt and turn the flywheel by 360 degrees in the direction of engine rotation. This will put No. 6 piston at the top center position on the compression stroke. Install the timing bolt in the flywheel.

    Follow steps 2 through 5 in order to adjust the slave piston lash on cylinders 2, 4, and 6.


  1. Remove the timing bolt from the flywheel after all adjustments have been made. Reinstall the timing cover on the flywheel housing.
Misael Bustamante
Maquinas de combustion interna ceu
Escrito por Misael Bustamante
el 30/09/2010

Gracias jose tu informacion es muy extensa y despejo mis dudas saludos compañero