Magnetic Clutch Removal; Magnetic Clutch Installation - Piper Dakota Maintenance Manual

c. Run engine for 15 minutes at 1200 rpm.
If air conditioner is to be operated on ground f or servicing, test
area must be clean and free of any loose objects lying on ramp.
d. Shut down engine and recheck both belt tensions- If compressor belt tension is below 60 pounds
retention to 80 pounds. If alternator belt tension is below 50 pounds, retention to 70 pounds.
e. This tension check is made at every 100 hours or annual inspection, whichever occurs first.
f. Check all idler and bracket bolts for safety. Reinstall engine cowling.
2. To adjust Gates belts, proceed as follows:
a. Adjust compressor belt to a static tension of 73 to 87 pounds. Adjust alternator belt to a static
tension of 65 to 70 pounds (new), or 35 to 40 pounds (used).
b. Install engine baffles if removed. Install engine cowling.
c. Run engine at 1200 rpm for 15 minutes.
If air conditioner is to be operated on ground for servicing, test
area must be clean and free of any loose objects lying on ramp.
d. Shut down engine and recheck both belt tensions.
e. This tension check is made at every 100 hours or annual inspection, whichever occurs first.
f. Check all idler and bracket bolts for safety. Reinstall engine cowling.
MAGNETIC CLUTCH REMOVAL (figure 21-12)
1. Remove self-locking capscrew and washer from compressor shaft.
2. Insert 5/8 - 11 UNC-2B bolt in threaded portion of hub and tighten. Pressure exerted by bolt on end of
compressor crankshaft will force off rotor pulley assembly without damage to clutch or compressor.
Do not use a wheel puller on the outer flange of pulley. This can
damage pulley grooves or clutch bearings.
3. Remove four bolts securing field assembly against compressor bosses and remove bolts, washers, and
field assembly.
MAGNETIC CLUTCH INSTALLATION (figure 21-12)
1. Position field assembly against compressor bosses, with electrical leads to cylinder side of compressor.
2. Secure field assembly with four capscrews and lockwashers, do not tighten at this time.
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
—WARNING—
—WARNING—
—CAUTION—
1G20
21 - 53 - 00
Page - 21 - 30
Reissued: August 1, 1986