Great Planes Yak-54 1.60 ARF - GPMA1411 - Manual (Page 12)

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8. Slide the 1" [25 mm] tail wheel onto the tail gear
assembly and secure it with a 3mm [1/8"] set screw and
3mm [1/8"] wheel collar. Be sure that the tail wheel rotates
freely. Oil the tail wheel axle if necessary.
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9. Slide the large 3mm [1/8"] tail wheel collar onto the
base of the tail gear and temporarily insert the assembly into
the tail wheel bushing. Center the tail gear bracket on the
fuselage against the tail wheel collar as shown. Mark the
location of the two holes in the bracket on the fuselage.
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10. Drill 1/16" [1.6 mm] diameter holes at the marks. Thread
a 2 x 8mm [5/64" x 5/16"] self-tapping screw into each of the
holes and remove it. Add a drop of thin CA glue to harden the
holes. Now secure the tail gear assembly to the fuselage by
sliding the guide wire through the nylon retainer and inserting
the base of the tail gear into the bushing. Use a 3 x 4mm set
screw to tighten the tail wire collar to the tail gear and install the
bracket with two 2 x 8mm [5/64" x 5/16"] self-tapping screws. Cut
off the excess guide wire leaving 1/2" [13 mm] beyond the
retainer. Add a few drops of thin CA to the nylon retainer being
sure not to get glue on the guide wire or in the hole.
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1. Temporarily assemble the main landing gear by
inserting the 3/16" [4.8 mm] axles into the holes in the main
gear. Slide a 3/16" [4.8 mm] wheel collar, 4" [102 mm] main
wheel, and then another 3/16" [4.8 mm] wheel collar onto
each axle. Mark the locations of the wheel collar screws onto
the axles. Remove the wheel collars and wheels from the
axles and file or grind flat spots at the marks for the wheel
collar screws to tighten against.
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2. Reassemble the gear, securing the axles with 5/16" x
24 lock nuts. Using four 4-40 x 1/2" [13 mm] SHCS and four
4-40 lock nuts, attach the wheel spats to the landing gear as
shown. Loosely thread four 6-32 x 1/4" [6 mm] SHCS into
the wheel collars. Slide a wheel collar, 4" [102 mm] wheel,
and another wheel collar onto each axle and tighten the
collar screws onto the flat spots on the axles. Be sure that
the wheels rotate freely.
Assemble & Install the Main Gear
12