Reassembly Procedures-continued - TM-11-5820-509-350157

TM 11-5820-509-35

NOTE

assembly (128) vertically oriented, and carefully insert

Proper assembly is achieved when

the front end of these shafts into their respective sleeve

only 1/4 detent position is possible

bearings.

as the center frequency-control shaft

is rotated counterclockwise; several

NOTE

turns of this shaft are possible in the

After spur gearshaft (28) meshes with

clockwise direction.

idler gear 129), but before the pinion

shaft extension engages sleeve

bearing 126), install flat washer (27)

(14) Assemble gearshaft-coupling half no. 2

on the end of the gearshaft.

as follows:

(a) Install sleeve bearing (81) in gear

(f) Continue to insert the gearshafts

plate (1031 and insert the shaft of coupling half no. 2

into their sleeve bearings and rock the three front panel

(114) into this bearing.

shafts and individual idler gears until all gears mesh and

(b) Install washer 182) on the shaft;

gear plate (103) is firmly seated on the shoulders of

then install shaft collar (831. Install spur gearshaft (28)

sleeve nuts (42) and (100).

and the shaft and secure the assembly by tightening

(g) Check the KILOCYCLES indicator

setscrews (86).

for proper wheel alignment at reading 2000. If any digit

(15) If bevel gear (47) has been removed from

is misaligned, adjust bevel gear (47) or idler gears of the

the kilohertz drive shaft of frequency indicator assembly

gear train.

(48), install this gear and secure it in place with

(h) Secure the gear plate to the sleeve

setscrews 146).

nuts with 6-32 x 3/8 pan head screws (102), (108),

(16) Install frequency indicator assembly 148)

(1191, and (137) with washers (101), (107), (118), and (

on the gear plate so that the pins in the frequency

136).

indicator assembly index the holes in the gear plate.

Secure in place with screws (116), (121), and (130) with

NOTE

washers (115), (120), and (129). (17) Install sleeve

Cable clamp (131) is secured with

bearings (20), (26), and (40), and ball bearings (31) and

gear plate (103) to sleeve nut (39)

(74) into the rear of the front panel.

with 6-32 x 3/8 pan head screw (134)

(18) Install the gear plate, with shafts, to the

and washers (321) and (133).1During

back of the panel as follows:

installation, dress the cable close to

(a) Position coupling half no. 1 (106)

the gear plate to prevent interference

and coupling half no. 3 (135) so that the bosses on

with the coupling of Signal Data

each coupling face are vertically oriented within 0.5

Translator CV-1377A/PRC-47.

angular degree.

(19) Assure that the faces of coupling halfs.

NOTE

(106), (114) and (135) are within the dimensional

Loosen shaft collars (60) and/or (92)

tolerances shown in figure 3-88. If adjustment is

to obtain adjustment of the vertical

required, loosen the setscrews in shaft collars (92) and

orientation of these coupling halfs.

(93), (83), or 160) and (61) to permit the couplings to

Tighten the setscrews securely when

slide in or out on the axis. Tighten all setscrews

they are properly adjusted.

securely when proper alignment is obtained.

(b) Rotate bevel-spur gear assembly

NOTE

no. 1 (65) until idler (37) is against its stop.

The setscrews in the shaft collars are

frequency

indicator

accessible from the underside of the

assembly (48) until the digit wheels read 2000. Maintain

RT-671/PRC-47 with modest rotation

this reading during the remainder of this procedure.

of the kilohertz and megahertz

frequency-control shafts. Exercise

CAUTION

care to maintain the boss orientation

Exercise

extreme

care

when

of the coupling halfs. during this

installing the gear plate assembly.

adjustment.

Always recheck to

Gear teeth or nylon gears can be

assure that they are vertically

damaged if they are improperly

oriented within 0.5 angular degree

meshed during assembly.

when the KILOCYCLES indicator is

adjusted to 2000.

(d) Carefully insert center gearshaft

assembly (78) into panel bearing (79).

(20) Align the power amplifier plate capacitor

(e) Maintain the bosses on the face of

switch to agree with the instruction in paragraph 3-17

coupling half no. 2 (114) and on gearshaft-coupler

c(11).

3-110