TM 5-3810-306-20
ELEVATION SWING WARNING SWITCH INSTALLATION
TOOLS: General mechanic’s tool kit: automotive (5180-00-177-7033)
SUPPLIES:
Lockwasher (Item 7, Appendix C)
EQUIPMENT CONDITIONS: Boom fully elevated.
Disconnect ground cable at shunt. (Refer to page 8-109.)
REMOVAL:
1.
REMOVE ELEVATION SWING WARNING
SWITCH (1).
a.
Remove screws (2) and cover (3) from switch
(1).
b.
Tag and disconnect electrical wires inside switch
(1).
c.
Loosen outer nut on strain relief (4) and pull
electrical wires out of switch (1).
d.
Remove screws (5), lockwashers (6) and switch
(1) from boom pivot box. Discard lockwashers
(6)
2.
LOOSEN HEX HEAD SCREW (7) AND REMOVE
306-10.) ARM (8) FROM SWITCH (1). RETAIN
ARM (8) FOR INSTALLATION.
3.
REMOVE STRAIN RELIEF (4) FROM SWITCH (1)
AND RETAIN FOR INSTALLATION.
INSTALLATION:
1.
INSTALL STRAIN RELIEF (4) IN SWITCH (1).
2.
INSTALL ARM (8) ON SWITCH (1). DO NOT
TIGHTEN HEX SCREW (7) AT THIS TIME.
3.
INSTALL ELEVATION SWING WARNING SWITCH
(1).
a.
Install switch (1) on boom pivot box with screws
(5) and new lockwashers (6).
b.
Loosen outer nut on strain relief (4) and
insert electrical wires through strain relief (4) into switch
(1).
c.
Connect electrical wire insides switch (1).as
tagged.
d.
Install cover (3) on switch (1) with screws (2).
4.
CONNECT GROUND CABLE AT SHUNT. (REFER
TO PAGE 8-109.)
5.
ADJUST SWITCH (1).
ADJUSTMENT:
1.
ADJUST ELEVATION SWING WARNING SWITCH
(1).
a.
Start crane and lower boom to 10 degrees.
(Refer to TM 5-3810-306-10)
b.
Rotate arm (8) on switch (1) until roller on arm
contacts turntable support plate. Tighten hex
screw (7).
c.
Elevate boom to 20 degrees and rotate boom
over rear of crane.
d.
Lower boom slowly, boom elevation swing
warning light in cab should illuminate when boom
is approximately 7.5 degrees above horizontal.
e.
With warning light activated and boom at
approximately 7.5 degrees, check that clearance
between lift cylinder and engine hood is a
minimum of 3 in. (7.62 cm)
f.
Adjust arm (8) on switch (1) to obtain
requirements.
END OF TASK
8-60
