DG Flugzeugbau LS8 - Removal and Installation of the Slide-In Tail Tank

Maintenance Manual LS8
Issued: December 2009
Copyright DG Flugzeugbau GmbH - any copy or publishing prohibited
Manual valid with the up-to-date cover page only
4-18
4.5 Removal and installation of the slide-in tail tank
Removal
(1) Disconnect operating cable from right drive lever at position >1<, see
sketch 2 in section 4.4, and extend with approx. 6 m <20 ft> of thin
nylon cord.
(2) Loosen clamp (or cut open bonding) holding discharge tube at right
lower rudder cut-out. Push stiff tube of approx. 7 to 8 mm <0.28 to 0.32
in> outside diameter and 1.5 m <5 ft> length into discharge tube.
(3) Dismount 2 bolts holding upper tank end at rib (8 mm thread, LN9037,
width over flats 13 mm).
(4) Cut silicone rubber seals along upper edge cautiously with sharp knife.
(5) Pull tank upward, at the same time push auxiliary tube
from lower end
accordingly.
Installation
(1) Before installation, check valve tightness using water; check also
tightness with valve fully open, but discharge tube held closed. Total
valve travel between 7 and 9 mm <0.28 to 0.35 in>. (In fully open
position spring coils are solid).
(2) Push discharge tube onto auxiliary tube, cover joint with tape to avoid
edge catching at ribs or webs.
(3) Connect drive cable with auxiliary cord.
(4) Insert tank into vertical tail fin upper end, simultaneously pull with
caution at auxiliary tube from lower end and at cord from cockpit.
(5) Valve must be inserted into cut-out in lower tail fin rib, use caution to
avoid valve damage.
(6) Seal upper tank edge with silicon rubber to surrounding structure.
(7) Mount 2 bolts holding upper tank end (and horizontal tail bracket), 8 mm
thread, LN 9037, width over flats 13 mm. When tank is combined with
battery box, these bolts also hold the hinged battery box cover.
(8) Clamp end of discharge tube (or fix by bonding) in right lower rudder
cut-out.
(9) Adjust valve operation as outlined in section 4.4.