C13 On-highway Engine Caterpillar

Illustration 1	g01173764
(1) Inlet port (2) Weep hole (3) Outlet port (4) Pressure regulating valve

When the fuel transfer pump is using diesel fuel, the fuel transfer pump has the following specifications:

1. Run the pump at 2940 rpm. The full bypass pressure must be 2100 to 2170 kPa (305 to 315 psi).

2. Run the pump at 840 rpm. The flow at 550 kPa (80 psi) must be minimum 3.0 L/min (0.8 US gpm).

3. Run the pump at 2940 rpm. The flow at 1930 kPa (280 psi) must be minimum 7.0 L/min (1.85 US gpm).

4. Run the pump at 120 rpm. Keep the inlet open to the atmosphere for 10 seconds. Block the inlet. The pump must maintain the vacuum of 30 kPa (4.5 psi) minimum in 30 seconds.

5. Run the pump at 840 rpm. Keep the inlet open to the atmosphere for 10 seconds. Block the inlet. The pump must maintain the vacuum of 45 kPa (6.5 psi) minimum in 30 seconds.

6. Run the pump at 120 rpm with a blocked inlet for 30 seconds. The pump inlet must have a suction lift of 60.9 kPa (9 psi) minimum.

When the pump is viewed from the drive end the rotation of the pump is counterclockwise.