Hopper Gate Box Removal; Hopper Gate Box Installation - Thrush Aircraft S2R–T660 Maintenance Manual

E. Curing temperature is 70
of 150 F for four hours is recommended followed by ten or more hours at 70
°
F. Brush the resin generously over the entire area. Apply alternate layers of fiberglass cloth
and mat. Each layer should overlap the preceding layer approximately one inch. After each
layer is in place, use a squeegee and/or roller to remove excess resin and air voids.
HOPPER GATE BOX REMOVAL (Figure 9-4)
Remove the aircraft skins to gain access to hopper gatebox bolts and nuts. Disconnect dump fork,
spray tube, adapter box and vent, emergency shut off cable and spray pump. Remove the nuts and
bolts and pry off sump.
If bolts do not drive out easily, turn bolts to break glue, then
drive bolts out.
Clean off all old gasket material by scraping, being cautious not to gouge hopper lip.
HOPPER GATE BOX INSTALLATION (Figure 9-4)
Before installing gate box, be sure that all mating surfaces are clean and dry. For maximum
strength, apply 3M Scotch-Weld
surfaces and both sides of gaskets thoroughly. Using alignment pins to hold gaskets in place and
to help align gate box, install bolts using large area washer on hopper side and tighten nuts.
Excessive uncured adhesive can be cleaned up with keytone type
solvents. (When using solvents, extinguish all ignition sources and
follow the manufacturer's precautions and directions for use for
handling such materials.) Application of adhesive to substrates should
be made within 75 minutes after mixing. Working life is 80 minutes.
Higher temperatures will reduce these times.
Allow 24 hours for sealer to cure before putting back into service. Reinstall tubes, controls and
cables and pump. Fill hopper and check for leaks. Water should be allowed to stay in hopper for a
minimum of two hours with no leaks.
Effective: 12/17/03
THRUSH AIRCRAFT INC - T660 TURBO THRUSH
AIRCRAFT MAINTENANCE MANUAL
F minimum. Higher temperatures accelerate curing. A maximum
°
** CAUTION **
™
DP-190 Translucent Epoxy adhesive evenly to both mating
* NOTE *
F.
°
9 - 4