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− Release your foot pressure on the pedals.
− If necessary, pump the brake pedals.
To release the parking brake, select control too off.
Landing Gear
DA20-C1 AMM
Page 6
19 Dec 1997 32-40-00 Doc # DA201-C1
Rev. 0
Figure 4: Wheel Brake Assembly
DA20-C1 AMM
Landing Gear
Doc # DA201-C1
Rev. 0 32-40-00 Page 101
19 Dec 1997
TROUBLE-SHOOTING
1. General
Use the data below to trouble-shoot the wheel and brake systems.
Complaint Possible Cause Remedy
Too much tire wear. Incorrect toe-in. Adjust the toe-in. Refer to
Chapter 32-10
Too much axial play in a wheel. Main wheel incorrectly adjusted.
Defective wheel bearing.
Adjust the main wheel.
Replace the wheel bearings.
Brake disk distorted. Brakes applied too hard.
Hard landing.
Replace the brake disk
Brakes do not hold static engine
run-up with the usual pedal
force.
Too much light braking. Brake
lining glaze worn away.
Condition the brake linings.
Brake(s) do not operate. Brake fluid level low.
Air in the brake system.
Defective master cylinder.
Defective caliper.
Worn brake linings.
Leaking connector.
Fill the system with brake
fluid.
Bleed the brake system.
Replace the master cylinder.
Then bleed the brake system.
Replace the caliper. Then
bleed the brake system.
Replace the brake linings.
Then bleed the brake system.
Tighten (or replace) the
connector. Then bleed the
brake system.
Landing Gear
DA20-C1 AMM
Page 102
19 Dec 1997 32-40-00 Doc # DA201-C1
Rev. 0
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DA20-C1 AMM
Landing Gear
Doc # DA201-C1
Rev. 0 32-40-00 Page 201
19 Dec 1997
MAINTENANCE PRACTICES
1. General
These maintenance practices tell you how to remove/install components. They also give the
conditioning procedure for the brake linings. Refer to the manufacturers data (Cleveland/Parker
Hannifin Corporation) for other shop work.
2. Remove/Install a Main Wheel
A. Equipment
Item Quantity Reference
Airplane jacks 2 Commercial
Tail former 1 ?
B. Remove the Main Wheel
Detail Steps/Work Items Key Items
(1) Remove the wheel fairing:
− Remove the outer bolt.
− Remove 2 screws on the inner side.
(2) Lift the airplane on jacks. Refer to Chapter 07-10
(3) Remove the back-plate from the brake
caliper.
Cut the locking wire!
(4) Remove the axle nut. Discard the cotter-pin!
(5) Pull the wheel from the axle.
Landing Gear
DA20-C1 AMM
Page 202
23 Jun 2004 32-40-00 Doc # DA201-C1
Rev. 10
C. Install the Main Wheel
Detail Steps/Work Items Key Items
(1) Apply a light coating of grease to the axle
where the wheel bearings go.
Use grease TYPE 1. Refer to Chapter 12-
20.
(2) Put the wheel in position on the axle Make sure that the brake caliper is
correctly engaged on the torque-plate.
Note: Turn the wheel by hand while you tighten the axle nut. This will remove
grease (which can separate the bearings) or burrs. Both can cause too much
wheel bearing play later.
(3) Install the wheel-nut with spacer washer. Torque 12.2 Nm (9 ft.lb).
(4) Loosen the axle nut until it is just loose.
(5) Tighten the axle nut. Torque 4.5 - 6.8 Nm (3.3 - 4.5 ft.lb).
(6) Loosen the axle nut until one of the two
holes in the axle aligns with the nut.
Do not loosen the nut more than 30°. (Half
of a flat).
(7) Install a new cotter-pin. Bend the ends of the cotter pin against the
axle nut.
(8) Measure the end play in the hub assembly. There should be from 0.25 - 0.125 mm
(0.001 - 0.005 in) of end play when
correctly adjusted.
(9) Lower the airplane with the jacks. Refer to Chapter 07-10
(10) Install the back-plate to the brake caliper. Torque 8.5 - 9Nm (75 - 80 in.lb).
Lock with wire!
(11) Install the wheel fairing:
− Install 2 screws on the inner side.
− Install the outer bolt.
DA20-C1 AMM
Landing Gear
Doc # DA201-C1
Rev. 0 32-40-00 Page 203
19 Dec 1997
3. Remove/Install the Nose Wheel
A. Equipment
Item Quantity Reference
Padded trestle 1 Commercial
Weight and strap 1 Commercial
B. Remove the Nose Wheel
Detail Steps/Work Items Key Items
(1) Remove the wheel fairing:
− Remove 6 Allen screws attaching the left
half of the fairing to the right half.
− Remove the LH and RH mounting
screws.
− Remove the fairing.
(2) Use weights to hold the rear fuselage down
with the nose wheel clear of the ground.
　
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