ISC, ISCe, QSC8.3, ISL, ISLe3, ISLe4 and QSL9 Engines – 004-014   Push Rods or Tubes

WARNING  Batteries can emit explosive gases. To reduce the possibility of personal injury, always ventilate the compartment before servicing the batteries. To reduce the possibility of arcing, remove the negative (-) battery cable first and attach the negative (-) battery cable last.

Remove the following:

• Disconnect the batteries. Refer to Procedure 013-009 in Section 13.
• Crankcase breather tube, external crankcase breather only. Refer to Procedure 003-018 in Section 3.
• Rocker lever cover. Refer to Procedure 003-011 in Section 3.
• Engine brake assembly, if equipped. Refer to Procedure 020-004 in Section 20.
• Rocker levers. Refer to Procedure 003-008 in Section 3.

Mark the push tubes to identify their location.

Remove the push tubes.

WARNING  Wear appropriate eye and face protection when using compressed air. Flying debris and dirt can cause personal injury.

Clean the push tubes in hot soapy water.

Dry with compressed air.

Inspect the push tube ball and socket for signs of scoring. Check for cracks where the ball and the socket are welded into the tube.

Check the push tubes for straightness.

Different adjusting screws are used depending on the engine configuration. Older designs used a collar feature (A) between the adjusting screw threads and the ball. Newer designs (B) have eliminated the collar feature. These components are matched depending on the engine configuration. If components are being replaced, make sure the correct part numbers are being installed.

Install the push tubes in their original location.

Install the push tubes into the sockets of the valve tappets.

Lubricate the push tube sockets with clean 15W-40 engine oil.

WARNING  Batteries can emit explosive gases. To reduce the possibility of personal injury, always ventilate the compartment before servicing the batteries. To reduce the possibility of arcing, remove the negative (-) battery cable first and attach the negative (-) battery cable last.

Install the following:

• Crossheads and rocker levers. Refer to Procedure 003-008 in Section 3.
• Adjust the valve lash. Refer to Procedure 003-004 in Section 3.
• Engine brake assembly, if equipped. Refer to Procedure 020-004 in Section 20.
• Rocker lever cover and associated gasket. Refer to Procedure 003-011 in Section 3.
• Crankcase breather tube and drain tube, external crankcase breather only. Refer to Procedure 003-018 in Section 3.
• Connect the battery. Refer to Procedure 013-009 in Section 13.

Operate the engine and check for leaks.