Wabco Air Compressors Caterpillar

Average weight (Wabco 318 cc) ... 17 kg (38 lb)

Number of cylinders ... 1

Bore size (Wabco 250 cc) ... 75.0 mm (2.95 inch)

Bore size (Wabco 318 cc) ... 85.0 mm (3.38 inch)

Stroke ... 55.9 mm (2.20 inch)

Displacement at 1250 rpm (Wabco 250 cc) ... 10.9 CFM (15 CFM Equivalent Output)

Displacement at 1250 rpm (Wabco 318 cc) ... 14 CFM (18.7 Equivalent Output)

Maximum recommended rpm ... 3000 RPM

Maximum continuous pressure of the discharge line (Wabco 250 cc) ... 1000 kPa (145 psi)

Maximum continuous pressure of the discharge line (Wabco 318 cc) ... 1034 kPa (150 psi)

Maximum transient pressure of the discharge line depends on boost pressure. Maximum pressure depends on system pressure setting. Maximum pressure depends on the system restriction. ... 1379 ± 517 kPa (200 ± 75 psi)

The system for the air supply must have an air dryer. Insulate the air line on applications when the duty cycle is low. Insulate 0.91 m (3.000 ft) of the discharge line. Insulate the discharge line from the inlet fitting of the air dryer. The discharge line must be sloped downward to the air dryer. The line should not have any droops that exceed one half of the diameter of the discharge line.

Tighten the gear retaining nut to the following torque. Wabco 250 cc ... 152 ± 2 N·m (112 ± 1.5 lb ft)

Place an index mark on the gear retaining nut and turn an additional 65 ± 5 degrees.

Tighten the gear retaining bolt to the following torque. Wabco 318 cc ... 160 ± 15 N·m (118 ± 11 lb ft)

Use a soft faced hammer to seat the gear onto the shaft. Strike the gear in line with the shaft.

Torque the gear retaining bolt again to the following torque. Wabco 318 cc ... 160 ± 15 N·m (118 ± 11 lb ft)

Coolant flow

Minimum coolant flow at 600 rpm (Wabco 250 cc) ... 1.5 L (0.40 US gal)

Minimum coolant flow at 600 rpm (Wabco 318 cc) ... 2 L (0.5 US gal)

Minimum coolant flow at 2000 rpm (Wabco 250 cc) ... 6 L (1.6 US gal)

Minimum coolant flow at 2000 rpm (Wabco 318 cc) ... 8 L (2.1 US gal)

Maximum coolant temperature ... 90 °C (194 °F)

Maximum coolant flow at 2000 rpm (Wabco 250 cc) ... 21 L (5.5 US gal)

Maximum coolant flow at 2000 rpm (Wabco 318 cc) ... 28 L (7.3 US gal)

Maximum inlet air temperature ... 90 °C (194 °F)

Maximum inlet air temperature for less than 30 minutes ... 110 °C (230 °F)

Maximum discharge air temperature ... 204 °C (400 °F)

Minimum ambient temperature ... -40 °C (-40 °F)

Maximum inlet temperature of the air dryer ... 71 °C (160 °F)

Minimum inlet temperature of the air dryer ... 7 °C (45 °F)

Note: Low air inlet temperatures of the air dryer must be avoided in order to minimize the risk of freeze-up in the air inlet line of the air dryer.

A heat shield is required if the air compressor is located within 76 mm (3.0 inches) of an exhaust pipe. A heat shield is required if the air compressor is located within 76 mm (3.0 inches) of a turbocharger.

Lubrication

Minimum oil pressure of the Wabco 250 cc at idle speed ... 104 kPa (15 psi)

Minimum oil pressure of the Wabco 318 cc at idle speed ... 104 kPa (15 psi)

Minimum oil pressure of the Wabco 250 cc at maximum speed ... 138 kPa (20 psi)

Minimum oil pressure of the Wabco 318 cc at maximum speed ... 138 kPa (20 psi)

Maximum temperature at oil inlet ... 121 °C (250 °F)

Minimum inside diameter of air inlet line ... 25.4 mm (1.00 inch)

Minimum inside diameter of discharge line ... 12.7 mm (0.50 inch)

Minimum cut-in pressure of the air compressor governor ... 414 kPa (60 psi)