Perkins 1300 EDi Series, Workshop Manual, Page: 135 / 264

9
Workshop Manual, TPD 1353E, Issue 3 123
Peregrine EDi and 1300 Series EDi
To check the actuator assembly of the waste-gate unit Operation 9-8
Notes:
l
If the waste-gate valve does not operate at the correct pressure, it can affect the engine performance.
l
If the valve opens at a low pressure, this can cause black exhaust smoke and loss of power at lower engine
speeds.
Cautions:
l
A high pressure setting can cause high cylinder pressures that can cause failure of the cylinder head gasket
and can cause damage to the bearings and pistons.
l
Do not apply an air pressure of more than 207 kPa (30 lbf/in
2
) 2,1 kgf/cm
2
to the actuator. Higher pressures
may damage the actuator.
l
Do not operate the actuator rod (A3) by hand, because the calibration of the actuator will be affected, and
this may cause damage to the engine.
1 Disconnect the boost sensor pipe at the actuator.
2 Connect the actuator to an air supply that has a pressure regulator (A5) and is fitted with an accurate gauge
(A4).
3 Fasten a dial gauge (A6) to the turbocharger with its plunger in contact with the end of the actuator rod (A2),
to measure the axial movement of the rod.
4 Slowly apply air pressure and check that the rod moves 0,381 mm (0.015 in) at 197 kPa (28.5 lbf in
2
)
2,0 kgf cm
2
. Ensure that the pointer returns to zero when the pressure is released.
5 Repeat step 4 of the operation several times, to ensure that an accurate reading is obtained
l
If the axial movement of the rod is correct, no adjustment is necessary. Remove the air supply and remove
the dial gauge.
l
If the axial movement of the rod is wrong, adjustment is necessary, see Operation 9-9. Remove the dial
gauge.
W056
A
1
2
3
4
5
6
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