Checking Flyweight Axial Wear With Drill Shank; Checking Flyweight Radial Wear With Gauge - Piper Lance II Service Manual

Issued: 1/3/78
LANCE II SERVICE MANUAL
FLYWEIGHT GAUGE
11-10041
Figure 8-20. Checking Flyweight Axial
Wear with Drill Shank
Figure 8-21. Checking Flyweight Radial
Wear with Gauge
d. Inspect for axial wear between flyweight and axle using shank of a new No. 35 drill
as a guage. Hold flyweight so the outer radius is in alignment with the rim of the cam flange
and try to insert the drill shank between the flange and flyweight as shown in Figure 8-21.
Do not force the drill. If the drill can be inserted, replace the cam assembly.
e. Inspect for excess radial wear between the flyweight and axle using the 11-10041
flyweight gauge. Insert the gauge between flyweights and against cam hub as shown in
Figure 8-21. If the gauge cannot be inserted easily, remove burr from edges of hub keyway
with a small file. Hold the gauge firmly against the hub, at the same time squeezing the
flyweights against the gauge. If the inner end of either flyweight heel touches the gauge,
replace the cam assembly. If parts are near limits, check clearance between flyweight and
gauge with a .003 inch feeler. If flyweight heel is tight on feeler, replace the cam assembly.
CAUTION
Never attempt to repair any part of a rejected cam and
flyweight assembly.
f. Inspect ears of the coupling body for grooves worn by the tail of the flyweights and
wear at the triggering ramp and cam stop contact areas. (Refer to Figure 8-22.) If either ear
shows a perceptible groove or a ridge can be felt when fingernail is drawn across the surface,
replace the coupling body.
g. Inspect drive lugs of body. If wear is noted, measure difference between worn and
unworn areas on drive lug surface. If difference is in excess of .015 of an inch, replace the
body.
h. With spring released and free, it should form a smooth spiral curve with no sharp
bends or flat spots. (Refer to Figure 8-23.) If spring is deformed, replace it.
POWER PLANT
2B13