HOSE AS 1146047 - Caterpillar

Pressure Test For The Fuel Transfer Pump
The fuel transfer pump is located on the right side of the engine.The pressure test measures the output pressure of the fuel transfer pump. Low fuel pressure and starting difficulty may be indications of problems with the fuel transfer pump.
Put a pressure gauge in the outlet of the fuel transfer pump.
Disconnect the fuel injection pump solenoid wire (if equipped). Put the fuel shutoff lever in the fuel shutoff position.
Crank the engine for ten seconds. Record the maximum pressure. The pressure indication on the gauge should be in the following ranges: Maximum pressure ... 42 to 70 kPa (6 to 10 psi)Minimum pressure ... 30 kPa (4.4 psi)
Observe the amount of time for the maximum pressure that was recorded during cranking to decrease by one-half. If the time is less than thirty seconds, the fuel transfer pump must be replaced or repaired.
Illustration 1 g00619310
(1) Strainer
(2) Cover
If the pressure is less than the minimum pressure, the fuel transfer pump must be repaired or replaced. Refer to the Disassembly and Assembly, "Fuel Transfer Pump - Remove" for more information. If the pressure is low, remove cover (2). Inspect the strainer (1) for debris.Clean the cover, the seal, and the strainer with a nonflammable solvent. Carefully wash any debris from the chamber of the pump.
Assemble the fuel transfer pump. Ensure that the cover of the fuel transfer pump is secure so that air cannot enter the system. Remove air from the fuel transfer pump. Refer to Testing and Adjusting, "Remove Air From The Fuel System".
Illustration 2 g00805066
Inspect the components of the fuel transfer pump.
(3) Pivot pin
(4) Link arm
(5) Rocker lever
Measure the fuel pressure again. If the pressure remains low, remove the pump from the engine. Inspect the installation of the pivot pin in the rocker lever and the link arm. If the pivot pin (3) fits loosely in the rocker lever (4) and link arm (5), replace the fuel transfer pump. If the pivot pin, the rocker lever, or the link arm are damaged, replace the fuel transfer pump.
Install the fuel transfer pump on the cylinder block. Clean the threads of the bolts or the studs and nuts. Apply 4C-4030 Thread Lock Compound to the first three threads of the bolts or studs. Refer to Specifications, "Fuel Transfer Pump" for the torque for tightening the bolts or the nuts and studs.