TM 5-2420-224-20-2
MAIN (MASTER) DISCONNECT SWITCH REPLACEMENT
This task covers:
a. Removal b. Installation
I N I T I A L S E T U P
Tools and Special Equipment:
Equipment Condition:
Tool Kit, SC 5180-90-CL-N26
Reference
Condition Description
Materials/Parts:
Page 2-24
Batteries Disconnected
Washer, Spring
Tension (2)
R E M O V A L
1.
REMOVE main disconnect HANDLE (1).
2.
REMOVE eight bolts (2), eight washers (3),
and cover PLATE (4).
3.
REMOVE two screws (5).
4.
LOOSEN jam NUT (6) and REMOVE KNOB
(7) and jam nut (6). LIFT PLATE (4) and
MOVE trailer brake control VALVE (8) ASIDE.
NOTE
Tag leads prior to disconnecting to
aid in connecting.
5.
CAREFULLY ROLL BACK rubber COVERS
(9) and DISCONNECT two LEADS (10).
6.
REMOVE two nuts (11), two spring tension
washers (12), two screws (13), and main
disconnect SWITCH (14). DISCARD spring
tension WASHERS.
I N S T A L L A T I ON
1.
2.
3.
4.
5.
INSTALL main disconnect SWITCH (14), two
screws (13), two new spring tension washers
(12), and two nuts (11).
CONNECT two LEADS (10) and CAREFULLY
ROLL rubber COVERS (9) BACK over
terminals.
POSITION trailer brake control VALVE (8) and
INSTALL jam nut (6), KNOB (7), and two
SCREWS (5). TIGHTEN jam NUT (6).
INSTALL cover PLATE (4), eight washers (3),
and eight bolts (2).
INSTALL main disconnect HANDLE (1).
NOTE
Follow-on Maintenance:
Connect batteries (page 2-24).
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