Compression - Test - Perkins 1104D NH1 Systems Operation Testing And Adjusting

RENR7967
3. Slowly apply air pressure to the wastegate so that
the actuator rod (4) moves 1.0 mm (0.039 inch).
The air pressure should be within 107 to 117 kPa
(15.5 to 17.0 psi). Ensure that the dial indicator
returns to zero when the air pressure is released.
Repeat the test several times. This will ensure that
an accurate reading is obtained.
4. If the operation of the wastegate is not correct, the
actuator rod (4) can be adjusted.
5. Remove Tooling (A) from the turbocharger.
6. When the air pressure is applied, loosen the nut
on the actuator. Remove the circlip (1). Remove
the pin (2) from the actuator rod (4).
7. When the air pressure is too low, adjust the end of
the actuator rod (4) in order to reduce the length
of the actuator rod (4). If the air pressure is too
high, adjust the end of the actuator rod (4) in order
to increase the length of the actuator rod (4).
8. Install the pin (2) to the actuator rod (4). Install the
circlip (1) to the actuator rod (4). Tighten the nut to
a torque of 5 N·m (44 lb in).
9. Repeat steps 2 to 3 in order to repeat the pressure
test.
10. If the air pressure is correct, remove the air
supply. Remove Tooling (A). Install the pipe for the
boost sensor (7).

Compression - Test

The cylinder compression test should only be used in
order to compare the cylinders of an engine. If one or
more cylinders vary by more than 350 kPa (51 psi),
the cylinder and related components may need to
be repaired.
A compression test should not be the only method
which is used to determine the condition of an engine.
Other tests should also be conducted in order to
determine if the adjustment or the replacement of
components is required.
Before the performance of the compression test,
make sure that the following conditions exist:
•
The battery is in good condition.
• The battery is fully charged.
•
The starting motor operates correctly.
•
The valve lash is set correctly.
•
All glow plugs are removed.
•
The fuel supply is disconnected.
Illustration 52
Typical example
1. Remove the glow plug (1) from the hole in the
cylinder head (2). Refer to Disassembly and
Assembly Manual, "Glowplugs - Remove and
Install" for the correct procedure for the removal of
the glow plug (1).
2. Install a suitable gauge for measuring the cylinder
i02562219 compression in the hole for a glow plug.
3. Operate the starting motor in order to turn the
engine. Record the maximum pressure which is
indicated on the compression gauge.
4. Repeat steps 1 to 3 for all cylinders.
Testing and Adjusting Section
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