Piper COMANCHE PA-24-180 Service Manual page 216

PIPER COMANCHE SERVICE MANUAL
6-32a. Inspection of Main Gear Side Brace Links and Rod End Bearings. (Refer to Figures 6-8b
and 6-8c)
a. Side Brace Links. To determine the serviceability of these parts requires the inspection of the
threads for wear, by determining the pitch diameter of the threads. There are two methods as follows:
1. Thread Ring Gauge Method (See Figure 6-8c). The following is the suggested method for
checking thread wear:
(a)
(2)
wear and determine
Procure standard thread ring gauges for the thread sizes specified in Figure 6-8c.
Using the instructions provided by the thread ring gauge manufacturer, check thread
pitch diameter. Figure 6-8c shows a typical three-step process.
2. Three Wire Method.
(a) See U.S. Department of Commerce Screw Thread Standard H-28 Handbook or any good
machinist's handbook.
(b) Follow the procedure given and calculate the pitch diameter based on wire size used.
3. If the link is worn in excess of the tolerances given in Figure 6-8c, it must be replaced.
b. Rod End Bearings.
1. This check requires the use of a NO-GO thread plug gauge (refer to table included in Figure
6-8b for the specific size gauge to use). This gauge can be purchased from any good tool supplier.
2. If the NO-GO gauge can be screwed into the bearing, the bearing is worn larger than the
tolerances given in the table with Figure 6-8b, and must be replaced.
NOTE
The NO-GO gauge should not fit a serviceable bearing.
6-33. Installation of Main Landing Gear. (Refer to Figure 6-9.)
NOTE
When assembling components of the landing gear, lubricate bearings.
bushings and friction surfaces with proper lubricant as described in Section II.
a. Insert a gear support bearing (43 and 48) in each support fitting (11 and 18) and secure with snap
rings (45).
b. The gear housing may be installed in the wheel well of the wing by the following procedure:
1. Place a spacer washer (17), 0.035, P/N 19513-10, or original number of washers and then the
forward support fitting (18) on the forward support arm of the strut housing.
LANDING GEAR AND BRAKES
Revised: 8/1598
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