Cummins N14 STC, Celect, Celect Plus – Service Manual 012-014   Air Compressor

NOTE: It is not necessary to time the air compressor on the NT engine. Although the Big Cam III through 88NT publications have specified air compressor timing, this is not required on any NT engine.

Position the timing mark on the air compressor crankshaft at the 12-o’clock position.

Position the accessory driveshaft dowel pin at the 2-o’clock position as view from the front of the engine.

Install the splined coupling onto the accessory drive shaft.

Make sure the gasket surfaces of the accessory drive and the air compressor are clean and not damaged.

Use a new gasket and install the air compressor and four capscrews to the accessory drive.

Install the air compressor support bracket.

Tighten the capscrews.

NOTE: If rubber grommets are used on the coolant lines, make sure they are installed carefully to prevent cuts or tears to the grommets which will cause coolant leaks. When flexible tubing is used, make sure that it does not rub any other surfaces.

Install the coolant and air lines to the air compressor and tighten.

Install the fuel pump drive coupling onto the air compressor.