Repair Procedures. - TM-11-5820-509-350155

TM 11-5820-509-35

stop assembly (125) and withdraw the gear assembly

(b) Remove snap rings (53), (95), and

from shaft (78).

1113) from posts (52), (94), and (112); then remove

pawls 154 ). (98), and ( I 10) from the posts.

(d) Withdraw gearshaft assembly (78)

toward the front side of gear plate (103)

removed from gear plate (103) by removing hex nuts

NOTE

(138), (105), and (85) together with washers (138),

C-ring (77) and bearing (76) need not

(104), and 184).

be removed from the gearshaft

(d) Pawl springs (56), (97), and (111)

assembly unless one of them is

are removed from the associated pawl by removing

defective.

spring pins (55), (99) and (109) respectively.

b. Repair Procedures.

(11) Remove frequency indicator assembly

(1) Examine all parts of the disassembled

148) from gear plate (103) by removing 4-40 x 5/16 pan

frequency selection mechanism for damage or

head screws (116), (121), and (130) with washers (115),

excessive wear. Particular attention should be directed

(120), and (129).

to the condition of gear teeth, bearings, sleeve bearings,

and springs. Replace any part that appears defective.

NOTE

(2) Do not lubricate any gears or bearings.

Do not attempt disassembly of

These parts are permanently lubricated and over-

frequency indicator assembly (48).

lubrication can damage the part or cause malfunction of

Except for bevel gear (47), this

other adjacent components.

assembly must be replaced as a unit.

(3) Whenever the panel bearings (23), (66),

or (79) are replaced, replace gaskets (22), (67), and/or

(12) Remove

gearshaft-coupler

assembly

(80) also. This will assure the splash-proof condition of

(128) as follows:

the equipment.

(a) Remove C-rings (32) and (33) from

c. Reassembly

Procedures.

Reassembly

their groves.

procedures are detailed in three parts: the components

(b) Withdraw

gearshaft-coupler

mounted directly to the front panel (idler gears, stub

assembly (128) from bearing (34).

shafts, etc.), the components associate with the gear

plate (frequency indicator assembly, detents, pawls,

(13) Remove coupling half no. 2 (114) from

springs, etc.), and the reassembly of the gear plate to

gear plate (103) as follows:

the front panel.

Depending upon whether total

(a) Loosen setscrews (86) in shaft

disassembly of the geartrain was required, some steps

collar (83) and withdraw pinion (28) from the shaft of

of the following procedure may be omitted.

coupling half 1114).

(1) Whenever panel bearings (23), (66), or

(b) Remove shaft collar (83) from the

179) are replaced, insert gaskets (22), (67) and/or (80)

shaft; remove washer (82); then remove coupling half

into the bearing housing and press them flat before

(114) from sleeve bearing (81).

inserting the bearing.

(14) Remove coupling half no. 1 (106) and

(2) Replace idler gear stub shafts (14), (15),

coupling half no. 3 (135) from gear plate (103) as

(17), and (35) only if they are defective. Press the

follows:

replacement shaft into place on the front panel; secure

(a) Release pawl springs (97) and (56)

stub shaft (35) with 6-32 x 5/16 flat head screw ( 10).

from eye screws (87) and (57) respectively.

(b) Remove coupling half no. 1 (106)

CAUTION

by loosening setscrews (96), two per collar, and

Never press stub shafts or panel

withdraw spur gear (21), shaft collars (92) and (93), and

bearings into the front panel without

spur gear detent (91) from the shaft.

first removing all panel-mounted

components that could be damaged

by loosening setscrews (621, two per collar, and

by this procedure. Protect the finish

withdraw spur gear 141), shaft collars (60) and (61), and

of the front panel while installing

spur gear detent (59) from the shaft.

these shafts: retouch wherever

(d) Withdraw coupling halfs (106) and

necessary.

(135) from the associated sleeve bearing, (90) or 158),

by pulling toward the rear of the unit.

(3) Install idler gears (18). (29), (37). and

(15) Pawls (54), (98), and (110) are removed

(431 on their stub shafts and secure with E-rings (19),

from gear plate (103) as follows:

(30), (38) and (44) respectively.

(a) Release pawl springs (56), (97), and

(4) Install sleeve nuts (25), (39), (42), (75),

(111) from their respective eye screws (57), (87), and

and ( 100 ) at their proper locations and secure them in

(117).

place with 6-32 x 1/2 flat head screws (7), (8), (9), (11),

and (12).

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