FUEL SYSTEM
6-12
BY Service Manual
Tests and Adjustments
6. Repeat procedure at the outlet end of the fuel
fine filter (Figure 6-5, (2)).
Specification
Results
• If pressure reading is not within specification,
inspect pre-filter (if equipped), fuel filter / water
separator, fuel fine filter, and fuel feed pump.
Testing Return Fuel Pressure
Note: This test is dependent on the fuel supply.
Test the low-pressure fuel system prior to
performing this test. See Measuring Fuel
Feed Pump Pressure on page 6-11.
1. Assemble a tee, hose, and 0 - 100 kPa
(0 - 15 psi) pressure gauge.
Figure 6-6
2. Disconnect the hose from the fuel return line
(Figure 6-6, (1)).
3. Connect test gauge assembly between
disconnected ends. Install and tighten hose
clamps.
4. Start engine and allow speed to stabilize at
normal low idle.
5. Read and record pressure.
Specification
Results
• If test pressure reading is not within
specifications, find and correct the return fuel
restriction.
Inspection Item RPM Specification
Fuel Feed Pump
Pressure
(Minimum)
All 5 bar (73 psi)
CAUTION
• ALWAYS be environmentally
responsible.
• Follow the guidelines of the EPA or
other governmental agencies for the
proper disposal of hazardous
materials such as engine oil, diesel
fuel and engine coolant. Consult the
local authorities or reclamation facility.
• NEVER dispose of hazardous
materials irresponsibly by dumping
them into a sewer, on the ground, or
into ground water or waterways.
• Failure to follow these procedures may
seriously harm the environment.
0000013en
Inspection Item RPM Pressure
Return Fuel
Pressure
All speeds
1.9 kPa (0.28 psi)
(7.6 in.Aq)
0003634A
(1)
To Next Page
General
