DISASSEMBLY/ASSEMBLY PROCEDURES OF DETECTOR DT-196/PDR-27J.

TM 11-6665-209-40

d. Replacement of Electron Tube V202.

(1) Place gasket (78) in position on electron tube V202 (77).

(2) Insert electron tube V202 (77) into detector assembly.

(3) Place guard (70) and retainer nut (69) over end of electron tube (77) and use re-

tainer nut (69) to push gasket into tube assembly. Tighten retainer nut.

(4) Replace electrical cap (57) removed in subparagraph c (2) above.

(5) Position wires removed in subparagraph c (1) above and secure with retainer

nut removed in subparagraph c (1) above and be sure not to twist wires.

e. Removal of Electron Tube V201. (Figure 3-3)

(1) Loosen retainer nut (63) one full turn.

(2) Remove nut (64), making sure wires do not twist and remove electron tube (66)

a s s e m b l y from small housing.

(3) Remove plastic shield (not shown) from tube assembly (68) and remove elec-

tron tube V201 from electron tube holder (67).

f. Replacement of Tube V201.

(1) Position electron tube V201 in electron tube holder (67) and replace plastic

shield.

(2) insert tube assembly into housing (68) and tighten with nut (64) making sure

wires do not twist.

(3) T i g h t e n r e t a i n e r n u t ( 6 3 ) .

3-10