Cummins ISX11.9 CM2250 – Service Manual 009-053   Belt Tensioner, Refrigerant Compressor, Automatic

WARNING  Tensioner is spring loaded. Do not attempt to disassemble the tensioner. Severe bodily injury can result.

With the tensioner installed on the engine, pivot the tensioner through the full range of motion. The tensioner must move with resistance while pivoting the tensioner away from the belt. If there is no resistance, replace the tensioner.

• Remove the cooling fan drive belt. Refer to Procedure 008-002 in Section 8.
• Remove the refrigerant compressor belt. Refer to Procedure 009-052 in Section 9.

Remove the mounting capscrew and refrigerant compressor belt tensioner from the bracket.

Check the belt for damage.

Transverse (across the belt width) cracks are acceptable.

Longitudinal (direction of the belt length) cracks that intersect with transverse cracks are not acceptable.

If the belt is frayed or has any piece of material missing, the belt is unacceptable and needs to be replaced.

WARNING  The belt tensioner is spring loaded. Do not attempt to disassemble the tensioner. Personal injury can result.

WARNING  When using solvents, acids, or alkaline materials for cleaning, follow the manufacturer’s recommendations for use. Wear goggles and protective clothing to reduce the possibility of personal injury.

Check the tensioner for dirt buildup. If the tensioner has dirt buildup, remove the tensioner and use solvent to clean the belt tensioner.

Check the belt tensioner pulley and body for cracks. If cracks are found, replace the tensioner.

Spin the tensioner pulley. The pulley must spin freely. If the pulley does not spin freely, replace the belt tensioner.

Install the belt tensioner.

Install and tighten the capscrew.

• Install the refrigerant compressor belt. Refer to Procedure 009-052 in Section 9.
• Install the cooling fan drive belt. Refer to Procedure 008-002 in Section 8.