TM 5-5420-280-23&P
0056 00
LIMIT SWITCHES MAINTENANCE (Contd)
REMOVAL
NOTE
Removal and installation of all limit switches are performed the
same way. Front A-frame mounted KA5 limit switch is shown.
Tag all electrical leads for installation.
1.
Remove two screws (7), cover (6), and gasket (5) from limit switch housing (4). Discard gasket (5).
2.
Disconnect electrical leads (14) from limit switch (3).
3.
Loosen nut (13) and remove nut (13), rubber grommet (12), and electrical cable (15) from fitting (11)
and limit switch housing (4).
NOTE
Mark position of limit switch before removal for installation.
4.
Remove four locknuts (17), washers (16), screws (8), washers (9), and limit switch (3) from
bracket (2) on A-frame (1). Discard locknuts (17).
5.
If damaged, remove fitting (11) and O-ring (10) from limit switch housing (4). Discard O-ring (10).
6.
If electrical cable (15) is damaged, remove tiedown straps and electrical cable hook to electrical box,
and disconnect electrical leads from KA5 terminals inside box. Refer to electrical system schematic
7.
If removing flexible rod (18) from limit switches K1 through K4, mark position of flexible rod
housing (20) before removal.
8.
Remove four screws (19), housing (20), and gasket (21) from switch housing (4). Discard gasket (21).
INSTALLATION
1. If removed, install flexible rod housing (20) as marked at removal on limit switch housing (4) with
new gasket (21) and four screws (19).
2.
If electrical cable (15) was removed, refer to electrical system schematic WP 0122 00 for electrical
lead connections. Route electrical cable (15) up to KA5 limit switch and secure with tiedown straps
as necessary.
NOTE
Apply a light coat of grease to O-ring and rubber grommet at
installation.
3.
If removed, install new O-ring (10) and fitting (11) on limit switch housing (4).
NOTE
Install limit switch as marked at removal.
4.
Install limit switch (3) on bracket (2) of A-frame (1) with four washers (9), screws (8), washers (16),
and new locknuts (17).
5.
Install nut (13), rubber grommet (12), and electrical cable (15) on fitting (11) of limit switch
housing (4) and tighten nut (13).
6.
Connect electrical leads (14) to limit switch (3).
7.
Install new gasket (5) and cover (6) on limit switch housing (4) with two screws (7).
0056 00-2
