Piper SARATOGA PA-32-301 Maintenance Manual page 597

PIPER AIRCRAFT
PA-32-301/301T
MAINTENANCE MANUAL
EXHAUST WASTEGATE ASSEMBLY.
REMOVAL OF EXHAUST WASTEGATE ASSEMBLY.
1. Remove engine cowling. (Refer to Chapter 71.)
2. Remove the nut, bolt and washers securing the wastegate interconnect cable bearing to the wastegate
control arm.
3. Remove V band clamps securing wastegate to exhaust transition and tailpipe.
INSTALLATION OF EXHAUST WASTEGATE ASSEMBLY.
1. Install wastegate assembly with gasket between exhaust transition and tailpipe.
2. Secure wastegate with V band clamps and torque clamps to specifications given in Figure 81-1.
3. Secure the wastegate interconnect cable bearing to the control arm with the appropriate washers. bolt
and nut.
- NOTE -
The wastegate valve should be lubricated with Mouse Milk or
WD-40 at the butterfly pivot points every 50 hours. Mouse
Milk may be purchased from: Worldwide Aircraft Filter Corp.,
1685 Abram Ct., San Leandro, CA 94577.
ADJUSTMENT OF EXHAUST WASTEGATE ASSEMBLY.
The exhaust wastegate (butterfly) valve is mechanically linked to the throttle control arm by means of the
wastegate interconnect cable. The wastegate may be adjusted as follows:
1. Remove the engine cowling as described in Chapter 71.
2. Remove the clamp securing the tailpipe assembly to the wastegate and separate wastegate and tail-
pipe assembly (separate sufficiently to allow access to the butterfly valve within the wastegate).
3. Place the throttle in the near-full open position.
4. Place the shank end of a #31 drill bit between the inner wall of the wastegate assembly and the butter-
fly valve (Refer to Figure 81-1.)
5. With the throttle now in the full-open position (against the stop) a slight drag should be felt when the
drill bit is moved in an in and out motion. Should the throttle control arm not contact its stop, or should the
drill bit be too loose, adjust the interconnect cable rod end to obtain the proper clearance.
6. Place the tailpipe assembly in position and secure with the appropriate clamps.
7. Install upper and lower cowling as described in Chapter 71.
8. Flight test the aircraft to determine critical altitude (16,000 + 500 feet density altitude) at take-off
power of 2700 RPM and 36 inches Hg.
9. If the above criteria is not met, further ground adjustment of the wastegate will be required.
81-00-10
Page 81-10
Revised: August 23, 1982
3B20