Perkins 854E-E34TA Systems Operation Testing And Adjusting page 57

UENR0623
Table 5
Position Measurement
A Inlet of fuel injec-
tion pump
B Inlet of secondary
fuel filter
C Outlet of secon-
dary fuel filter
D Injector return line
E Return line
1. Remove all relevant tube assemblies. Refer to
Disassembly and Assembly for the correct
procedures.
2. Install Tooling (A) at location (A). Refer to
illustration 51 . Install Tooling (B) at locations (B),
(C), (D), and (E). Refer to illustration 51 .
3. Start the engine. Refer to Operation and
Maintenance Manual for the correct procedure.
4. Use Tooling (A) and (B) to measure the pressure
values in the order indicated in table 5 at both idle
speed and at maximum engine speed with zero
load. In both measurement conditions, the values
measured must be between the minimum and
maximum permissible pressure values.
5. Use Tooling (A) to measure the pressure value at
position (A). If the pressure value measured is
lower than the minimum permissible pressure,
check that the primary fuel filter is not restricted.
Check that the tube assemblies upstream of the
measurement point are not restricted. Check that
there are no signs of air infiltration or damage in
the tube assemblies and connectors upstream of
the inlet of the fuel injection pump. Replace any
damaged components.
6. Use Tooling (B) to measure the pressure value at
position (B). If the pressure value measured is
lower than the minimum permissible pressure,
check that the fuel injection pump functions
correctly. Check for leaks in the circuit. If the
pressure value measured is greater than the
maximum permissible pressure, check that the
lines between the secondary fuel filter and the fuel
injection pump are not restricted. Replace any
damaged components.
This document is printed from SPI². Not for RESALE
Minimum Maximum
Pressure Pressure
50 kPa -
(7.25 psi)
400 kPa 650 kPa
(58 psi) (94 psi)
400 kPa 650 kPa
(58 psi) (94 psi)
30 kPa 80 kPa
(4.35 psi) (11.6 psi)
- 20 kPa
(2.9 psi)
7. Use Tooling (B) to measure the pressure value at
position (C). If the pressure value measured is
lower than the minimum permissible pressure, or if
the difference between the value and the value
measured in step 6 is greater than 150 kPa
(22 psi), check if the secondary fuel filter is
restricted. If the pressure value measured is
greater than the maximum permissible pressure,
check that the tube assemblies between the
secondary fuel filter and the fuel injection pump are
not restricted. If the problem persists, check that
fuel injection pump functions correctly. Replace
any damaged components.
8. Use Tooling (B) to measure the pressure value at
position (D). If the pressure value measured is
lower than the minimum permissible pressure,
check that there is no leakage from the injector
return line. Check that the check valve (6) that is
integrated in the injector return line is functioning
correctly. If the pressure value measured is greater
than the maximum permissible pressure, check
that there are no restrictions in the lines of the
injector return line. Check that the check valve (6)
that is integrated in the injector return line is
functioning correctly. If the problem persists, check
that the electronic unit injectors are functioning
correctly with the electronic service tool. Replace
any damaged components.
9. Use Tooling (B) to measure the pressure value at
position (E). If the pressure value measured is
greater than the maximum permissible pressure,
check that there are no restrictions in the fuel
return lines. Check that the components of the
high-pressure fuel system, such as the fuel
injection pump, fuel manifold and electronic unit
injectors are working correctly by using the
electronic service tool test function to identify any
faults relative to these components. Replace any
damaged components.
Note: Check that the manifold connector (7) is
functioning correctly. Check that fuel flow is visible in
the transparent pipe downstream of the connector (7).
10. Remove Tooling (A) and (B) at locations (A), (B),
(C), (D), and (E).
11. Install all relevant tube assemblies. Refer to
Disassembly and Assembly for the correct
procedures.
57
Fuel System