GA-UL260-2B
For UL Engines
of 12
3
A
If installing spinner place the aft bulkhead
on the engine flange or spacer (if installed)
making sure to line up the blade cut outs with
the flush drive lugs. Check to make sure the
protruding drive lugs stand out at least .200”
beyond the spinner bulkhead
B
Place aft hub half on the crankshaft sit over
the flush drive lugs and line up with the aft
bulkhead blade cut outs (if installed). Secure
aft hub half with the two short mounting bolts
and Wedge-Lock washers. Hold the aft hub half
in place by inserting two long mounting bolts
and place a sturdy length of wood (roughly
the length of the torque wrench being used)
in between them to apply counter torque.
Torque Bolts to Appropriate Values
(Table
1, Page 1)
.
d
b
NOTE:
we recommend using Loctite 242 or
262 on the internal mounting bolts as they
cannot be safety wired
C
Now the forward hub and blades can be
installed. This is easier with two people
however if you are installing the propeller by
yourself;
d
l
Start by placing the blades hub hardware
and tools within arms reach of the mounted
aft hub.
d
l
Next turn the aft hub until the blade
sockets are aligned vertically.
d
l
Place the top blade in first (with one hand)
and hold it in place using the forward hub
half (with the other hand).
d
l
Now angle the hub half so that it holds the
top blade but provides a large enough gap
to insert the bottom blade and forward
hub half.
d
l
Once both blade are in, lightly secure the
propeller assembly with the mounting and
clamping bolts.
Installation Instructions
d
l
Make sure there is an even gap between
the two hub halves. The blades should be
secure but easily rotated.
D
Once the propeller is mounted on the prop
flange, you are ready to set the initial blade
pitch.
d
b
NOTE:
Certain aircraft manufacturers limit
the total pitch range to comply with aircraft
design regulations.
d
b
NOTE:
If the Clamping Bolts have already
been torqued, loosen the bolts so the blades
can rotate smoothly in the hub. The Wedge-
lock washers will click loudly when loosened.
1.
Rotate the propeller so that the blades are
horizontal, or level with the ground.
2.
Calibrate protractor by placing it on an
exposed flat portion of the forward hub half
and zeroing read out.
3.
Slide the pitch paddle and protractor on the
blade as shown. Make sure the pitch paddle
is parallel with the Blades cord line.
Install Propeller
17
o
Vertical Axis
(Perpendicular
to Thrust Line)
Thrust Line
Pitch
Paddle
Digital
Protractor
Typical - UL260 - 107Hp
