REPAIR INSTRUCTIONS, PART 2
Page 439
Replacing a Clevis Pin
A clevis pin can be replaced if it is worn, seized,
damaged or lost. If replacement of the clevis pin
is required, a pin and clip kit (part No.
7536-174126) is available through the MACK
Parts System. When removing the existing pin
and installing a new pin:
1. Disconnect the air line from the actuator and
apply 40–60 psi of clean dry shop air to
extend the actuator rod slightly. This must
be done to remove the pre-load on the
actuator rod.
2. After removing the existing pin, align the
hole in the actuator rod end with the hole in
the clevis, then install the new pin. Ensure
that the flat on the top of the pin is aligned
with the straight edge of the lever arm clevis
and that the pin is completely seated.
3. Secure the pin in place with the C-clip,
making sure the clip is fully seated in the
groove.
536
Figure 536 — Actuator Rod Clevis Pin Installation
Turbocharger Wheel Speed Sensor
Replacement
The turbocharger wheel speed sensor is located
near the top of the VTG turbocharger bearing
housing, between the oil inlet port and the VTG
vane actuator. This sensor provides turbine
wheel speed input to the EECU. The sensor
assembly consists of the sensor and a short
length of wire with a connector.
537
Figure 537 — Turbocharger Wheel Speed Sensor
1. Actuator Rod 2. Vane Operating Lever
1. Wheel Speed Sensor
5-111.bk Page 439 Monday, July 10, 2006 2:26 PM
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