Fuel System Pressure

TM 9-2320-312-24-2

Testing and Adjusting Section

i01665918

Fuel System Pressure - Test

SMCS Code: 1250-081; 1256-081

Table 5

Tools Needed

Part Number

Part Name

Quantity

Engine Pressure Test

1U-5470

Group

198-4240

Pressure Indicator Tool Gp

3Y-2888

Connector

3J-1907

O-Ring Seal

Note: Both the 5P-2720 Probe Adapter and the

5P-2718 Pressure Probe can be used with these

tools. Use these additional tools to allow the future

g00936682

installation of pressure probes.

Illustration 47

Typical example

Follow these steps in order to prime the fuel system:

Fuel leaked or spilled onto hot surfaces or elec-

1. Locate the fuel priming pump.

trical components can cause a fire. Clean up fuel

spills immediately.

2. Operate priming pump's plunger (1) in order

to fill the final fuel filter. Continue until you feel

resistance.

NOTICE

Keep all parts clean from contaminants.

Note: You may need to pump the priming pump

for 25 times or more in order to fill the fuel filter.

Contaminants may cause rapid wear and shortened

Furthermore, you may need up to 75 pump strokes

component life.

to fill the fuel supply passage.

NOTICE

3. Push the plunger and tighten the plunger in a

Care must be taken to ensure that fluids are contained

counterclockwise direction. Tighten the plunger

during performance of inspection, maintenance, test-

by hand.

ing, adjusting and repair of the product. Be prepared to

collect the fluid with suitable containers before open-

4. After you pressurize the fuel system, promptly

ing any compartment or disassembling any compo-

crank the engine.

nent containing fluids.

Note: Use the engine starting procedure. Refer

Refer to Special Publication, NENG2500, "Caterpillar

to Operation and Maintenance Manual, "Engine

Tools and Shop Products Guide" for tools and supplies

Starting" in the Operation Section.

suitable to collect and contain fluids on Caterpillar

products.

Dispose of all fluids according to local regulations and

mandates.

The 1U-5470 Engine Pressure Test Group or the

198-4240 Pressure Indicator Tool Gp can be used

in order to check the engine's fuel pressures.