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9929419 R02 - 2018-2019 RZR XP / XP 4 Turbo S Service Manual
© Copyright Polaris Industries Inc.
ACTUATOR / WASTEGATE INSPECTION
The actuator pod, actuator rod/linkage and internal
wastegate flapper components, along with the boost
control solenoid, are responsible for releasing pre-turbine
exhaust pressure and limiting boost pressure. The
actuator is located outside of the turbocharger,
positioned below the unit with the actuator pod fastened
to the compressor housing by M6 fasteners.
1. If a condition where little-to-no boost pressure is seen
under wide open throttle, ensure that the actuator rod
is still properly fastened, the flapper arm is still under
tension from the actuator pod, and that no
mechanical component failures have occurred.
2. Feel for any free-play on either end of the actuator
rod. Ensure that the actuator crank arm is holding the
internal wastegate disc firmly closed.
3. Using the turbine discharge flange as a mounting
point, fasten a magnetic base dial indicator to the
turbine housing, touching the dial indicator plunger to
the outer wastegate crank arm
q
in the axial
direction so that the opening distance of the
wastegate flapper valve is measured by the dial
indicator.
IMPORTANT
The location of the dial indicator plunger should be just
below the crank arm upper taper, as close to the axis of
the heim joint as possible.
4. Zero the indicator dial with the flapper in its natural
resting position with no air pressure applied to the
actuator pod.
5. With the use of an air regulator and pressure gauge,
attach an air supply line to the actuator pod pressure
reference port, located on the top of the canister.
ENGINE / COOLING SYSTEM
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