Inspection Of Tail Wheel Assembly; Tail Wheel Reassembly And Installation (600-6 8Pr) - Thrush Aircraft S2R–T660 Maintenance Manual

INSPECTION OF TAIL WHEEL ASSEMBLY

A. Visually check all parts for cracks, corrosion, distortion, defects and excessive wear.
B. Inspect felt grease seals. Replace if surface is hard or contaminated, or shows evidence of excessive
wear. Lightly saturate grease seal felts with SAE 10wt. Oil (3-in-ONE oil) (do not soak).
C. Inspect tire for cuts, anomalies, internal damage and deterioration.
D. Inspect inner tube for cuts, wrinkles, anomalies and deterioration. Note: Do not use a used inner tube
with a new tire. Tubes grow in service, taking a permanent set of about 25% larger than original size.
This makes a used tube too large to use in a new tire, which could cause a wrinkle and lead to tube
failure.
E. Inspect wheel bearing grease for contamination and solidification at each periodic inspection. Repack
bearings with MIL-G-81322 (Aeroshell 22) or equivalent grease. Note: Do not exceed 500 wheel miles or
on annual inspection whichever comes first between repacking intervals.
F. Clean and inspect bearing cups and cones. Note: Do not spin dry bearings or handle bearing
components with bare hands. The bearing cup should not be removed except when replacement is
necessary due to scratches, nicks, pitting, spalling, corrosion, brinelling, or evidence of overheating.
Note: If bearing cup is replaced, its companion bearing cone must also be replaced.
1. Bearing cup removal: Heat wheel half in an oven not exceeding 212°F for 15 minutes. Remove
wheel half from heat source and immediately remove bearing cup by carefully tapping out evenly
from the inside with a fiber drift.
2. Bearing cup installation: Place wheel half in oven not exceeding 212°F for 15 minutes. Chill new
bearing cup in an atmosphere of -25°F to -65°F for no less than 4 hours. Chilling can also be
accomplished by placing the bearing cup in dry ice for a minimum of 15 minutes. Dry cup
thoroughly and installed chilled bearing cup into bore of heated wheel half using a thin coat of
zinc chromate primer as a lubricate/protectant. Tap gently into place with fiber drift making sure
bearing cup is evenly seated against shoulder of wheel half. Avoid cocking bearing cup during
installation. If bearing cup will not seat properly in wheel half, repeat above said procedures or
replace wheel half assembly.
G. Replace any wheel casting that is distorted, corroded, or has visible cracks.
TAIL WHEEL REASSEMBLY AND INSTALLATION (6.00—6 8pr)
To assemble and reinstall tail wheel, refer to Figure 6-1 and proceed as follows:
A. Wipe tire and tube (serviceable or new) with denatured alcohol, followed by soap and water, then dry
thoroughly.
B. Inflate the inner tube just enough to round it out, dust tube lightly with tube talc.
Effective: 01/10/05
THRUSH AIRCRAFT INC - T660 TURBO THRUSH
AIRCRAFT MAINTENANCE MANUAL
R1
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