SERVICE MANUAL & ICA
8750 AMPHIBIAN/SEAPLANE FLOATS ON CESSNA 208/208B
Revision F
Page 43 of 104
P/N 1005723 Doc. No. W8750-24-01
4.0 GENERAL
The main landing gear incorporated within the
amphibious floats are retractable, quadricycle
type with four main wheels in a dual tire
formation. Air-oil shock struts on the two main
landing gear assemblies provide shock
absorption.
The main landing gear has dual 6:00 x 6 8-ply
tires. All tires must be approved to TSO C62,
type III. The gear system is hydraulically
actuated and driven by two hydraulic pumps.
Brakes are hydraulic and there is a caliper on
each main wheel.
BRAKE REMOVAL & INSPECTION
Each main wheel has a dedicated brake caliper.
To remove the brake caliper:
1. Remove two mounting bolts on each caliper.
2. Compress the caliper piston using a c-clamp.
3. Slide caliper off of the brake disc.
Brake pads should be replaced when the
minimum section thickness is less than 0.100”,
see Figure 4-1.
Generally, the brake discs should be checked for
wear, grooves, deep scratches, and excessive
pitting. Pitting deeper than 0.015” or thickness
below 0.327” is cause for replacement.
MAIN WHEEL AND TIRE REMOVAL
AND INSPECTION
To remove each main wheel:
1.
Remove brake caliper.
2.
Drain oil from the axle by removing the plug
in the hub cap of the inboard wheel.
3.
After oil drains, remove snap ring and hub
cap.
4.
Cut cotter pin and remove axle nut.
5.
Pull wheel off of axle.
Each main wheel is a split-type rim. To remove
the tire:
1.
Remove air from tire
2.
Remove 3 bolts that hold wheel together
3.
Split rim and remove tire and tube
Inspect an oil sample taken from the axle. Look
for signs of bearing wear including metal
shavings or other impediments in the oil. If the
oil sample is clean and there are no
abnormalities with the wheel spinning, further
inspection including removing the wheel only
needs to be done at the inspector’s discretion.
Note: Some grease may show up in the oil
sample as a result from grease used by the
wheel manufacturer. Grease does not affect the
wheel bearing lubrication, but oil may be
changed to flush loose grease from the system if
desired.
Main gear tires should be replaced when the
tread is worn through in any area. Reinstallation
is the reverse of removal for tires, wheels, and
brakes.
FIGURE 4-1: MINIMUM BRAKE
LINING THICKNESS
