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 TM 55-4920-201-14
4-12. HAMILTON STANDARD PROPEL-
indicated by the black indicator disc at the top end
LERS.
of the arbor.
i. For balance tolerance and application of
4-13. Models 2D30, and 231140 - Hub and Blades
balance corrections, refer to applicable manual.
Only. (See figure 4-4, Typical).
(Refer to appendix A).
a. Set all blades of propeller assembly to name
NOTE
pitch angle in accordance with instructions in
Should interference occur between hand
applicable manual. (Refer to appendix A).
wheel (8, figure 4-4) and inside diameter of
work stand, make and install -inch
NOTE
(approximate dimension) wood blocks
Pitch settings must not be disturbed during
under the two work stand legs so as to
the following balance operations.
center the suspended arbor in relation to
b. Center propeller assembly (1), with front
the work stand.
side of propeller upward, on stand table assembly
4-14. Model, 2D30 with Cylinder and Counter-
(1, figure 1-13).
weights. (See figure 4-5).
CAUTION
Block or hold round propeller hub
a. Set blades of propeller assembly (1) as near
barrel of two-blade assemblies to
to flat pitch as possible. Adjust cylinder position so
prevent propeller assembly from
as to be visually centered and in line with propeller
hub bore.
rolling off stand.
b. Center propeller assembly (1), with cylinder
C.
Select applicable SAE size front cone,
and counterweights upward, on stand table
part no. 2206 when balancing propeller 2D30,
assembly (1, figure 1-13).
(3, figure 4-4) or part no. 2208 when balancing
propeller 23D40, (3, figure 4-4) and install cone,
CAUTION
hub upward, on balancing arbor (4) so that top
Hold or block propeller hub barrel to
surface of cone hub aligns on arbor scale (5) with
prevent propeller assembly from
11 inch position when balancing the 2D30 pro-
rolling off stand table assembly.
peller, or the 11 inch position when balancing
the 23D40 propeller. Lock cone securely in this
position by tightening front cone setscrew (2)
cylinder; and place cone in front cone seat of
with 1/8 inch hex wrench (8, Figure 1-13).
propeller hub.
d. Install lower end of balancing arbor (6)
d. Install arbor and cone assembly downward
downward through propeller cylinder and pilot
into propeller hub, seating cone in propeller front
bore of front cone (2) so that top surface of cone
cone seat.
hub aligns with the 11-1/8 inch position on
e. Install applicable SAE size rear cone part
arbor scale (8).
no. 2205 when balancing propeller 2D30, (6,
peller 23D40, (6, figure 4-4), hub downward, over
lower end of arbor, and push cone upward into
arbor (6), and push cone upward into propeller
propeller rear cone seat, Do not lock rear cone
rear cone seat. Hold cone in place.
setscrew. Hold cone in place.
f. Install part no. 2203, spacer (11), on lower
f. Install spacer part no. 2203 (7) on lower
end of balancing arbor (6). Install hand wheel
end of arbor. Install hand wheel (8) in bottom end
(12) in bottom end of arbor, and tighten wheel to
of arbor, and tighten wheel to clamp cones se-
clamp cones securely in propeller hub cone seats.
curely in propeller hub cone seats.
g. Install 3 / 16-inch suspension cable (13,
g. Install part no. 2224 bottom cylinder cone
(9), hub upward, over top end of balancing arbor
assembly on suspension rod at top end of arbor, and
(6), and seat cone firmly in bottom end of pro-
engage suspension cable in lifting plate of hydraulic
peller cylinder. Move cylinder as required to make
pump assembly.
certain that cone is centrally seated. Lock cone
h. Hoist entire assembly approximately inch
securely in this position by tightening bottom
off work stand. Check to insure that the suspended
cylinder cone setscrew (4) with 1/8-inch hex
assembly is free from interference with work stand
wrench. (8, figure 1-13) modified as shown in
or other objects, and note the balance condition
figure 4-5 inset.
4-6
Change 1
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