Replacement of Diplexer Circulator 3A7HY1

TM 11-5820-695-35

(2) Secure BP filter in place with front

mounting screws.

(3) Remove the CV-3633/GRC-144(V)

from the R-1467(P)A/GRC-144(V) cabinet.

(3) Handtighten BP filter and waveguide

twist together with two hex socket head screws,

(4) Remove screws that secure top cover

lockwashers, and flat washers.

of electrical equipment chassis 3A7 (fig. 5-108, top

view with cover removed).

(4) Tighten but do not overtighten BP

filter and waveguide twist together.

(5) Remove

alarm

monitor

3A1,

converter frequency electronics 3A2, amplifier-multiplier

(5) Secure

top

cover

electrical

3A5, power supply 3A6, and BP filters 3A3 and 3A4.

equipment chassis 3A7.

(6) Remove waveguide assembly W3

(6) Replace alarm monitor 3A1 and

support nuts and screws.

converter frequency electronics 3A2 or amplifier-

multiplier 3A5 and power supply 3A6.

(7) Remove four hex socket head screws,

flat washers, and lockwashers that secure waveguide

(7) Replace the CV-3633/GRC-144(V) or

assembly W3 to directional coupler 3A7DC1.

the R-1467(P)A/GRC-144(V) cabinet.

(8) Remove four hex socket head screws,

(8) Set the T-1054(P)A/GRC-144(V) and

flat washers and lockwashers that secure other end of

R-1467(P)A/GRC-144(V) POWER ON/OFF switches to

waveguide assembly W3 to diplexer circulator 3A7HY1

ON.

and remove waveguide assembly W3 and gasket "O"

rings.

(9) Set the POWER ON/OFF switch on

the status panel 3A8 to ON.

(9) Remove diplexer circulator 3A7HY1

from LH and RH diplexer supports and remove

waveguide twist W2 and W6 and gasket "0" rings from

NOTE

diplexer circulator.

If BP filter was replaced perform the

CV-3633/GRC144(V) receive section

Replacement.

conversion loss test. If BP filter 3A4

was

replaced

perform

the

(1) Secure waveguide twist W2 and W6

AN/GRC144(V) output power test.

and gasket "O" rings to diplexer circulator 3AHY1 with

eight screws, flat washers and lockwashers.

(10) Perform the CV-3633/GRC-144(V)

receive section conversion loss test (para 3-79) or

(2) Replace diplexer circulator 3A9HY1

AN/GRC-144(V)4 output power test (para 3-76).

on LH and RH diplexer supports.

3-53.6.

Replacement

Diplexer

Circulator

(3) Secure waveguide assembly W3 and

3A7HY1 (fig. 5-108)

gasket "O" ring to diplexer circulator 3A7HY1 with four

screws, flat washers and lockwashers.

Removal.

(4) Secure other end of waveguide

(1) Set the T-1054(P)A/GRC-144(V) 3nd

assembly W3 and gasket "O" ring to directional coupler

R-1467(P)A/GRC-144(V) POWER ON/OFF switches to

3A7DC1 with four hex head socket screws, flat washers

OFF.

and lockwashers and replace assembly support screws

and nuts.

(2) Set the POWER ON/OFF switch on -

he status panel 3A8 to OFF.

Change 6

3-74.4