Repair Procedures. - TM-11-5820-509-350152

TM 11-5820-509-35

back of XMTR OUTPUT meter compartment by

NOTE

removing 4-40 x 1/4 flat head screws (34) and (47).

Items most subject to wear and

breakage include coil windings, gear

CAUTION

teeth, inductor rollers, roller rods,

Use extreme care when removing

sleeve bearings, inductor shafts and

inductors (36), (64), (70) and (101) to

nylon mounting blocks.

prevent damage to side contact

spring assemblies (60) and (86).

(2) Lubricate the rollers of the power amplifier

load and tune inductors only if they squeak. Place one

or two drops of Beacon #325 lubricant on each roller

(13) Carefully withdraw POWER AMPLIFIER

rod, then wipe the entire rod with a clean soft cloth.

LOAD inductor (64) from gear plate (117) being careful

Sufficient oil film will remain on the rod to adequately

not to damage sleeve bearing (84) or to lose washer

lubricate the roller.

(67).

(14) Remove POWER AMPLIFIER TUNE

CAUTION

inductor (101) as follows:

Do not over-lubricate. Malfunction of

(a) Loosen screw (102) in shaft collar

roller contacts, arcing, and damage

(103) until the collar moves freely on the inductor shaft.

to adjacent components in the power

(b) Hold the shaft collar as inductor

amplifier compartment can occur.

(101) is withdrawn from sleeve bearing (106).

(15) Remove 6-32 x 1/4 flat head screw (115),

c. Reassembly

Procedures.

Reassembly

washer (116) and associated shims and carefully

procedures are detailed in three specific areas: the

withdraw inductor (36) from gear plate (117) so that

components mounted directly to the rear of the power

sleeve bearing (37) is not damaged.

amplifier compartment (gear plate, rear contact spring

(16) Remove 6-32 x 1/4 flat head screw (110),

assemblies, side contact spring assemblies, etc.), the

washer (111) and associated shims and carefully

components associated with the four inductors (sleeve

withdraw inductor (70) from gear plate (117) so that

bearings, shaft collars, gears, etc.), and finally the

sleeve bearing (59) is not damaged.

reassembly of the front panel to the power amplifier load

(17) Remove side contact spring assemblies

and tune mechanism. Depending upon whether total

(60) and (86) by carefully removing 6-32 x 5/16 flat head

disassembly was necessary, some steps of the following

screws (112) and (109) respectively.

procedures may be omitted.

(18) Loosen and remove 6-32 x 5/16 flat head

(1) Attach lower rear mounting block (87) to

screws (113) and (114) and carefully withdraw upper

gear plate (117) with 6-32 x 5/16 flat head screws (107)

roller spring assembly (39) and upper rear mounting

and (108) and tighten them securely.

block (40).

(2) Attach gear plate (117) to the rear wall of

(19) Remove upper rear mounting block (40)

the power amplifier compartment with the six 632 x 1/4

from upper roller spring assembly (39) by removing 6-32

pan head screws; tighten them securely.

x 1/4 flat head screws (54) and (55).

(3) Install gear and stop assembly (62) on

(20) Remove E-ring (63) and gear and stop

stub shaft (61) and secure it in place with E-ring (63).

assembly (62) from stub shaft (61).

(4) Install lower rear roller spring assembly

(21) Remove lower roller spring assembly from

(88) on mounting block (87) with 6-32 x 1/4 flat head

mounting block (87) by loosening and removing 6-32 x

screws (80) and 81).

1/4 flat head screws (80) and (81).

(5) Install upper roller spring assembly (39)

(22) Remove gear plate (117) by loosening

on mounting block (40) with 6-32 x 1/4 flat head screws

and removing the six 6-32 x 1/4 pan head screws that

(54) and (55).

secure the gear plate to the rear wall of the power

(6) Install the spacer-contact spring assembly

amplifier compartment.

(step 5) to gear plate (117) by securing upper mounting

(23) Remove lower rear mounting block (87)

block (40) with 6-32 x 5/16 flat head screws (113) and

from year plate (117) by removing 6-32 x 5/16 flat head

(114).

screws (107) and (108).

(7) Install side contact spring assemblies /60)

b. Repair Procedures.

and (86) to gear plate (117) and secure them in place

(1) Examine all items of the disassembled

with 6-32 x 5/6 flat head screws (112) and (109)

power amplifier load and tune mechanism for damage

respectively.

and excessive wear. Replace those items that are

(8) Install sleeve bearings (37), (59), (84),

defective.

and (106) in gear plate (117).

(9) Carefully insert the shaft of inductor (36)

3-105