TM 55-4920-431-13
b. Lift front panel assembly (16) out of case (26).
c. Disconnect electrical connector (P4) from control assembly (19).
d. Remove four screws (24) securing plate assembly (23) to case (26).
e. Lift front panel assembly (16) and plate assembly (23) from case (26).
f. Remove screws (20), washers (21), spacers (22) and control assembly (19).
g. Install control assembly (19) into replacement case (26) and secure with screws (20), washers (21), and
spacers (22).
h. Install plate assembly (23) in case (26) and secure with four screws (24).
i. Connect electrical connector (P4) to control assembly (19).
j. Install front panel assembly (16) into case (26) and secure with ten screws (17) and washers (18).
4-25. REPAIR. The following paragraphs describe repair of the tester.
4-26. HARNESS REPAIR. Refer to figure FO-1 for wiring of harness connectors. Replace damaged or
deteriorated wire, sleeving, and pins. Refer to General Aircraft Maintenance Manual TM 55-1500-204-25/1 to
repair connectors. Use following materials as required (ref table 1-2).
Pins
Insulated Sleeving, Type F, Form U, Grade A, Class I, Category I, Black, per MIL-I-631
Thermocouple Wire K/ALKTW-20F-KK, Thermo Electric Co., Inc. Saddle Brook, NY
Shielded Pair Wire, Teflon Coated, Type E, per MIL-W-16878
Wire, Type E, 20 AWG, per MIL-W-16878
Strap, Tiedown, Identification, Adjustable, MS3368-5-9E
4-27. TESTER WIRING. Refer to wiring diagram, figure FO-2. Replace all damaged or deteriorated wiring.
Use following materials as required (ref table 1-2).
T/C Wire, M5846-1-B-1/24A and M5846-1-B-1/24C per MIL-W-5846/1
Wire, Type 3, 22 AWG, per MIL-W-16878
Strap, Tiedown, Adjustable, MS3367-1-9
Shrink Tubing
Crimp-On Terminal Lugs
4-28. PAINTING. Refinish exterior of case (26, figure 5-1) as required. Paint yellow, color number 13538 per
FED-STD-595A. Renew lettering in gloss black, color number 17038 per FED-STD-595A.
Change 1
