Diamond DA 42 NG, Maintenance Manual

Page: 1293 / 2339

AIRCRAFT
DA 42 NG AMM
Landing Gear
Doc # 7.02.15
Rev. 4
32-10-00
Page 229
15 Mar 2018
B. Assemble Main Landing Gear Damper
Detail Steps/Work Items Key Items/References
(1) Assemble the inner cylinder:
S
Install the O-ring onto the upper cap.
S
Install the upper cap together with the center
bolt onto the damper pipe.
S
Install the orifice plate onto the damper pipe.
S
Install the lock nut.
Refer to Figure 7.
Use a new O-ring. Apply Teflon oil S408
onto the O-ring.
If MÄM 42-659 is NOT installed: Make
sure to install the cap onto the correct
side (grooves are different on cod side).
Make sure not to damage the orifice
plate.
Use new self-locking nut.
Apply Loctite 262 on thread and tighten
with 15 Nm (11.1 lbf.ft.).
(2) Assemble damper tube:
S
Install the quad ring and the two backup
rings onto the tube.
S
Put inner cylinder onto a tube (special tool)
to raise it.
S
Slide the damper tube onto the inner
cylinder.
Refer to Figure 7.
Use new O-rings.
(3) Install the bottom cap:
S
Install the O-ring onto the cap.
S
Push the bottom cap onto the damper tube.
S
Install the M6 lower cross bolt, washer and
lock nut to secure the cap.
Refer to Figure 7.
Use a new O-ring.
Apply Teflon oil S408 onto the O-ring.
Use new self-locking nut.
Apply Loctite 262 onto the thread.
(4) Install the charging valve onto the damper. Apply Teflon oil S408 onto the O-ring.
(5) Charge the damper with nitrogen and oil. Refer to Section 32-10.
(6) Install the MLG damper. Refer to Section 32-10.