Service Manual User guide

Reference Diagrams
4-41 Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K
R4 RELAY
IGNITION SWITCH RELAY
R5 RELAY
INSTRUMENT PA
N
PARKING BRAKE V
A
18"
BLACK - 16
A B
A
B
I N
O U T
RH OUTRIGG
DIFFERENTI
A
39321A
LH OUTRIGG
E
DIFFERENTIA
L
39321A
S6
S5
(39321A)
DIFFERENTIAL PRESSURE SWITCH
BOOM EXTENDED LESS
THAN 21' - OUTRIGGERS UP
PROXIMITY
SWITCH
LH OUTRIGGER
SWITCH
RELAY #4
PIN #86
BOOM/TRANS
F
EXTEND LOCK
O
VALVE SOLEN
O
PIN #86
RELAY #5
BOOM/TRANSFER EXTEND LOCKOUT CIRCUIT OPERATION
CLOSED
OPEN
OPEN
OPEN
CLOSED
OPEN
OPEN
OPEN
CLOSED
CLOSED
CLOSED
CLOSED
ENERGIZED - BOOM
& TRANSFER EXT.
A
12 VOLTS
0 VOLTS
12 VOLTS
12 VOLTS
0 VOLTS
12 VOLTS
OPEN CLOSED
OPEN
0 VOLTS
0 VOLTS
DE-ENERGIZED - B
O
& TRANSFER EXT.
D
OPERATING
PARAMETERS
RH OUTRIGGER
SWITCH
BOOM EXTENDED TO 21'
OUTRIGGERS UP
BOOM EXTENDED TO 21'
OR FURTHER
OUTRIGGERS DOWN
& TRANSFER EXT.
A
ENERGIZED - BOO
M
BOOM EXTENDED LESS
OUTRIGGERS DOWN
THAN 21'
12 VOLTS
12 VOLTS
ENERGIZED - BOO
M
& TRANSFER EXT.
A
BOOM EXTENDED TO 21'
LH OUTRIGGER UP
RH OUTRIGGER DOWN
DE-ENERGIZED - B
O
& TRANSFER EXT.
D
RH OUTRIGGER UP
LH OUTRIGGER DOWN
BOOM EXTENDED TO 21'
OPEN
CLOSED
OPEN
0 VOLTS
DE-ENERGIZED - B
O
& TRANSFER EXT.
D
0 VOLTS
S4 S5
S6
R4 R5
Boom/Transfer Extend Lockout Circuit Operation, Mid-Inlet Hydraulic System - Diagram 11