When removing the engine support brackets the 2
rubber resilient bracket pads should be separated
from the mounting base and from the engine support
brackets. Replace if unserviceable.
4-25 Plate, Support
The support plats for the 12 inch duct assemblies is
removed in the same manner as the engine base.
Remove the six cap screws and drop the support
plate. Installation is accomplished by reversal of this
cleaning and painting. Replace unserviceable sup-
4-26 Canvas Strap
Remove the 2 canvas straps which retain the 12 inch
duct assemblies by unbuckling and unthreading
from the slotted holes found in the engine base and
in the support plate. Check the webbing and buckle
for serviceability. Replace unserviceable strap. Rein-
stall the canvas straps by reversing procedure
Figure 4-5. Engine support bracket, removal and installation.
The instructions in this paragraph pertain to either
one of the 12-inch flexible duct assemblies.
a. Removal. Lift the 12-inch duct assembly from
its storage space and unroll or unfold the 12-inch
(1) Remove the engine mounting base per
(2) Remove the 12 capscrews and the washers
(1) Check the duct assembly for broken bands
holding the engine support brackets to the engine.
and for bent or missing duct band pins and anchor
(2) Check for missing or tom asbestos lining on
When removing the right engine support bracket it will be
the attaching end of the duct assembly.
necessary to remove the bolt, flatwasher, lockwasher, and
(3) Inspect for worn or missing duct expanding
nut holding the grounding strap to the engine support
cords and for bent expanding cord, hooks.
(4) Check. for tears, ripped seams, and loose
b. Service the support brackets by cleaning and
rivets on the attaching end of the duct assembly.
(5) Inspect for any distortion holes, tom seams,
c. Inspection Check the support brackets for ser-
viceability and if they are defective, install ser-
defective, replace it with a serviceable one.
c. Installation. Reverse the procedure in (a) above.
d. Installation Reverse the procedure in a. above.