REPAIR INSTRUCTIONS, PART 2
Page 265
8. Remove the SRA from its mounting.
9. Remove and discard the gasket.
379
Figure 379 — SRA Mounting Surface
10. Clean the actuator drive gear with a lint-free
cloth.
380
Figure 380 — SRA Drive Gear
11. Inspect the actuator drive gear for wear and
damage.
12. Inspect the drive pinion shaft bearings for
damage and malfunction.
Turbocharger SRA Inspection and
Installation
With the actuator removed, it is possible to check
the condition of the variable geometry
mechanism by manually moving the sector gear
through its full travel, and performing the checks
described in the following procedure.
VGT Mechanism Checks
1. Using heavy work gloves, manually rotate
the sector gear back and forth
(counterclockwise and clockwise). It should
be noted that, when the sector gear is at the
end of travel (at an end stop), it can require
significant force to overcome friction and
then start its motion in the opposite
direction. This is normal and not cause for
concern. By wearing a sturdy work glove,
more force can be applied to move the
sector gear. Once in motion, the sector gear
movement should be smooth without binding
or sticking until it reaches its end of travel
(end stop).
381
Figure 381 — Rotating the Sector Gear
1. SRA Housing
2. Attaching Screws
3. Gasket
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