Diamond Aircraft DV 20 E 2022, Airplane Maintenance Manual

Page: 533 / 903

AIRCRAFT
DV 20 E AMM
Landing Gear
Doc # 4.02.25
Rev. 2
32-20-00
Page 213
15 Mar 2022
6. Adjust the Shock Absorber Assembly
When new elastomer elements are installed, dimension “a” (see Figure 4) should be 195 mm or
7.7 in with the nose wheel clear of the ground.
The preload on used elements is adjusted properly when rubber elements cannot be turned by
moderate force of hand while the nose wheel is clear of the ground. With the elastomer package
properly preloaded, dimension “a” must not be less than 185 mm or 7.3 in. Otherwise the rubber
elements must be replaced.
7. Adjust the Nose Landing Steering Friction
Steering friction prevents nose wheel shimmy.
A. Equipment
Refer to Chapter 07-10 for the equipment required for jacking the airplane.
B. Procedure
Detail Steps/Work Items Key Items/References
(1) Jack the airplane. Refer to Chapter 07-10.
(2) Remove the nose-wheel fairing.
(3) Inspect condition of belleville springs, washers,
spacer and stop plate.
Replace as required.
(4) Check the NLG friction by application of force
to NLG wheel axle in both directions along the
axle.
(5) If required, adjust the nose-wheel fork pivot nut:
S
Remove the cotter pin (if required).
S
Adjust the nut.
S
Install a new cotter pin.
The nose-wheel must just caster when
you apply a force of 30 - 50 N (6.75 -
11.25 lb.) acting in the direction of the
nose wheel axle. Refer to Figure 6.
If the cotter pin hole and the nut
castellation do not align after adjustment
of steering friction install/remove one
AN960-616L thin washer. Washer is
optional and (if installed) located in
between the two AN960-616 washers. It
may be necessary to tighten the nut to the
next castellation if alignment is not
obtained. Refer to Figure 5.