The compressed air system normally consists of a gear driven air compressor, an air governor, air tanks and all necessary plumbing. The Holset SS191B air compressor is an engine-driven, piston-type compressor which supplies compressed air to operate air activated devices. The compressor operates continuously but has a “ loaded” and “ unloaded” operating mode. The… Read More »
Replacement Preparatory Steps: • Remove the air crossover tube, if used. • Disconnect the charge air cooler hose (automotive engines only). • Disconnect the air intake and exhaust piping. • Remove the turbocharger, if used. Removal 15 mm. Remove the exhaust manifold and gaskets. Cleaning and Inspection Clean the sealing surfaces and inspect the exhaust… Read More »
Replacement Preparatory Steps: • Remove the air crossover tube, if used. • Disconnect the charge air cooler hose. • Disconnect the boost capsule actuator hose. • Disconnect the intake and exhaust piping. Removal 10 m m Remove the capscrews from the oil drain tube. 16 mm Disconnect the oil supply line. NOTE: Engines built after… Read More »
Replacement Preparatory Steps: • Disconnect the cold starting aid, if used. • Remove the air crossover tube. • Drain 2 litres [2.1 U.S. quarts] of coolant. Removal 8 mm Remove the coolant supply tube (1) and the coolant return tube (2). 10 mm Remove the aftercooler housing and gasket. Cleaning Clean the sealing surface. NOTE:… Read More »
Replacement Preparatory Steps: • Disconnect the cold starting aid, if used. • Remove the air crossover tube, if used. • Disconnect the charged air cooler hose, if used. • Remove the high pressure fuel lines. Removal 10 mm Remove the manifold cover, gasket, and grid heater if equipped. Cleaning Clean the sealing surface. NOTE: Keep… Read More »
Replacement Removal and Installation 8 mm or Screwdriver Loosen the hose clamps and position the hose so the crossover tube can be removed. Use new hose and clamps as required to install the cross over tube. Torque Value: 8 N®m [72 in-lb]
If the engine experiences a turbocharger failure or any other occasion where oil or debris is put into the CAC, the CAC must be cleaned. Remove the CAC from the vehicle. Refer to the vehicle manufacturer’s instructions. ” Flush the CAC internally with solvent in the opposite direction of normal air flow. Shake the CAC… Read More »
NOTE: The long term integrity of the charge air cooler system is the responsibility of the vehicle and component manufacturers; however, the following symptoms can be checked by any Cummins Authorized Repair Location: Intake Manifold Pressure – Check Install pressure gauge, Part No. ST-1273, to the fitting in the turbocharger outlet. Install another pressure gauge,… Read More »
Install pressure gauge, Part no. ST-1273 to the pressure tap in the exhaust head pipe or at the inlet to the catalyst/ muffler assembly. Operate the engine at rated speed and load. Record the exhaust restriction. If restriction exceeds specification, inspect the oxidation catalyst and/or muffler and replace per vehicle manufacturers instructions.
NOTE: The wastegate is set accurately from the factory. Adjustment is not necessary unless the capsule is removed. Connect clean regulated air pressure to the boost cap sule (2). Regulate the air pressure to the wastegate capsule per the following table. Measure actuator travel (1). Specified wastegate measurement is 0.33 to 1.3 mm [0.013 to… Read More »