Diamond DA 42 NG, Maintenance Manual

Page: 2120 / 2339

AIRCRAFT
Liquid Cooling System
DA 42 NG AMM
Page 206
15 Mar 2018
75-00-00
Doc # 7.02.15
Rev. 4
4. Remove/Install Silicate Pouch (If MÄM 42-852 is installed)
Note: If MÄM 42-852 is NOT installed, refer to Paragraph 11.
Detail Steps/Work Items Key Items/References
(1) Remove the engine cowlings. Refer to Section 71-10 and 71-11.
WARNING: DO NOT REMOVE THE FILLER CAP FROM THE COOLANT TANK IF
THE ENGINE IS HOT. THE PRESSURE IN THE SYSTEM CAN FORCE
HOT COOLANT TO COME OUT AND BURN YOU.
(2) Remove the safety lock wire from the filler cap
on the coolant expansion tank.
(3) Remove the filler cap from the coolant tank to
relief any pressure which may be resident in the
system:
S
Turn the cap counterclockwise a small
distance to release the pressure.
S
When the pressure has fully released, turn
the cap fully counterclockwise.
(4) Remove retaining ring inside the filler neck.
(5) Remove max coolant level plate.
(6) Remove the used silicate pouch and replace it
with the new silicate pouch. Remove cartridge
and clean it with water. Reinstall cartridge.
(7) Install the max coolant level plate. Be sure that the engraved max coolant
marking is on the top.
(8) Install the retaining ring.
(9) Check coolant level, refill if required. Refer to Paragraph 7.
(10) Install cap on the coolant expansion tank.
Check O-ring for deformation.
Refer to Section 20-70.
Torque 12-15 Nm (8.85-11.06 lbf.ft.).
Renew O-Ring if necessary.
Apply EZ TURN.
(11) Install safety lock wire to secure filler cap. Wire diameter 0.8 mm (0.032 in).