(a)
Precise Tool NG2.0000-16 PTG THREADSNAP, used to examine the pitch diameter of the axle thread with undersized configuration.
(b)
Precise Tool NG2.0625-16 PTG THREADSNAP, used to examine the pitch diameter of the axle thread with original configuration.
(2)
CHF/PD - Axle external thread gage tool, Johnson Gage Co., Inc. (Optional)
(3)
Micrometer of appropriate size and accuracy, used to measure the major diameter of the axle thread.
(4)
Axle nut NO-GO Gage Tool for minor diameter.
(a)
Plug Gage, Landing Gear Nut, F80198-14, used to examine the minor diameter of the axle nut with original configuration or equivalent vendor tool Class X, 1.9949 Go/2.0034 NoGo with handle.
(b)
Plug Gage, Landing Gear Nut, F80198-15, used to examine the minor diameter of the axle nut with undersized configuration or equivalent vendor tool Class X, 1.9391 Go/1.9477 NoGo with handle.
(5)
Axle Nut NO-GO Gage Tool for pitch diameter.
(a)
NO-GO Gage, 2-1/16-16 UNS 3B NoGo member only with handle, pitch diameter 2.0272, used to examine the pitch diameter of the axle nut with original configuration.
(b)
NO-GO Gage, 2-16 UNS 3B NoGo member only with handle, pitch diameter 1.9647, used to examine the pitch diameter of the axle nut with undersized configuration.
All the NO-GO gage tools, except for the F80198-XX, can be purchased from PRECISE TOOL and GAGE CO. INC., 13300 S.E. 30th St., Suite No. 201, Bellevue, WA 98005 USA Tel. No. (206) 746-1234/623-1120, Fax No. (206) 747-8131
B. Procedure
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A
737-300/400/500MAINTENANCE MANUAL
S 226-004
CAUTION:_______ MAKE SURE THAT YOU ATTACH A LABEL WHICH READS "CAUTION -
SPECIAL AXLE NUT IS NECESSARY" ALONG THE UPPER OUTER END OF THE
AXLE SLEEVE ON THE AIRPLANES WITH REWORKED AXLES. THE LABEL
MUST HAVE YELLOW LETTERS ON A BLACK BACKGROUND. IF NO LABEL IS
ATTACH ON THE AXLE, THE INCORRECT AXLE NUT CAN BE INSTALLED.
THE INSTALLATION OF INCORRECT AXLE NUT CAN CAUSE THE WHEEL TO
FALL OFF DURING TAKEOFF OR LANDING.
(1) Do a check on the wear limits of the axle on the nose landing gear (Fig. 601).
NOTE: A Johnson CHF/PD thread measuring system (or equivalent)
____ can be used as an option to measure the thread pitch diameter, but a separate set of pitch diameter rollers and a master thread plug gage is necessary for each size of thread. The plug gage is used to set the dial indicator of the measuring system before you measure the thread pitch diameter. The major diameter can be measured with a micrometer.
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A 737-300/400/500MAINTENANCE MANUAL
Nose Gear Axle Wear Limits
Figure 601 (Sheet 1)
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A 737-300/400/500MAINTENANCE MANUAL
NO. INDEX PART NAME DIM. DESIGN LIMITS WEAR LIMITS WORN PART REPLACE PART WORN REPAIR INSTR. REPAIR
DIAMETER PER-MITTED WEAR DIM. DIA MAX ANCE CLEAR-
MIN MAX
1 7 AXLE 1 2.0595 4 2.0625 2.048 X 6
2 2.0189 5 2.0219 2.009 X 6
1 8 AXLE 1 1.9910 1.9940 1.986 X
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本文链接地址：737-300 400 500 AMM 飞机维护手册 起落架 LANDING GEAR 2(42)
