Main Wheel Disassembly (Mccauley Two-Piece Wheel); Main Wheel Inspection And Repair (Mccauley Two-Piece Wheel) - Cessna 177 SERIES Service Manual

5-11D. MAIN WHEEL DISASSEMBLY. (Ic
Cauley d.
Inspect thru-bolts (24) and nuts (10) for cracks
Two-Piece Wheel.)
(Refer to figure 5-4A.)
in threads or cracks in radius under bolt head.
a. Completely deflate tire and tube and break loose
e. Replace cracked or damaged wheel half (6).
tire beads. Extreme care must be exercised to pre-
f. Replace damaged retainer rings (1) and seals
vent tire tool damage when removing tire from wheel
(2), (3) and (4).
halves (6).
g. Replace worn or damaged bearing cups (27) and
cones (5).
[WAR
N
I
NG
X
h. Replace any worn or cracked thru-bolts (24) or
nuts (10).
Serious injury can result from attempting to
i. Remove any corrosion or small nicks.
separate wheel halves with tire and cube in-
j. Repair reworked areas of wheel by cleaning
flated.
thoroughly, then applying one coat of clear lacquer
paint.
b. Remove nuts (10) and washers (9).
k. Pack bearings with grease specified in Section 2
c. Remove thru-bolts (24) and washers (25).
of this manual.
d. Separate and remove wheel halves (6) from tire
5-11F. MAIN WHEEL REASSEMBLY. (Mc Cauley
and cube.
Two-Piece Wheel.) (Refer to figure 5-4A.)
e. Remove retaining rings (1), grease seal retain-
a. Assemble bearing cone (5), grease seal retainer
ers (2) grease seal felts (3), grease seal retainers
(4), grease seal felt (3), grease seal retainer (2) and
(4) and bearing cones (5) from both wheel halves (6).
retaining ring (1) into each wheel half (6).
b.
Insert tube in tire, aligning index marks on tire
NOTE and tube.
c. Place wheel half (6) into tire and tube (side
Bearing cups (races) (27) are a press fit in opposite valve stem), aligning base of valve stem
wheel halves (6), and should not be removed in valve slot. With washer (25) under head of thru-
unless a new part is to be installed. To re- bolt (24), insert bolt through wheel half (6).
move bearing cups, heat wheel half in boiling d. Place wheel half (6) into other side of tire and
water for 30 minutes, or in an oven, not to
tube, aligning valve stem in valve slot.
exceed 121°C (250°F). Using an arbor press. e. Insert washers (9) and nuts (10) on thru-bolts
if available, press out bearing cup and press (24), and pre-torque to 10-15 lb. in.
in a new bearing cup while wheel half is still
hot.
CAUTION
5-11E. MAIN WHEEL INSPECTION AND REPAIR.
Uneven or improper torque of the nuts
0
(McCauley Two-Piece Wheel.)
(Refer to figure can cause failure of the bolts with re-
5 -4A.)
sultant wheel failure.
a. Clean all metal parts and grease seal felts in
Stoddard solvent or equivalent, and dry thoroughly.
f. Prior to torquing nuts (10), inflate tube with
approximately 10-15 psi air pressure to seat tire.
NOTE
CAUTION
A soft bristle brush may be used to remove
hardened grease, dust or dirt.
Do not use impact wrenches on thru-bolts
or nuts.
b. Inspect wheel halves (6) for cracks or damage.
c.
Inspect bearing cones (5), cups (27), retaining
g. Dry torque all nuts (10) evenly to a torque value
rings (1), grease seal retainers (2), grease seal
specified in figure 5-4B.
felts (3) and grease seal retainers (4) for wear or
h.
Inflate tire to correct pressure specified in
damage.
figure 1-1 of this manual.
SHOP NOTES:
5-6D Change 7