Service Manual User guide

Reference Diagrams
4-29 Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K
R4 RELAY
IGNITION SWITCH RELAY
R5 RELAY
INST
R
PARKIN
LC
PD
STP
PLT
PR
PU
P1G
STB
OR2
PF
LH OUTRIGGER - BASE END
DIFFERENTIAL PRESSURE SWITCH
39321A
OPEN BELOW 92 PSI DIFFERENTIAL
CLOSED ABOVE 92 PSI DIFFERENTIAL
RH OUTRIGGE
R
DIFFERENTIAL
39321A
OPEN BELOW 92
P
CLOSED ABOVE
9
S6
S5
(39321A)
DIFFERENTIAL PRESSURE SWITCH
BLACK - 16
BOOM EXTENDED LESS
THAN 21' - OUTRIGGERS UP
PROXIMITY
SWITCH
LH OUTRIGGER
SWITCH
RELAY #4
PIN #86
BOOM / T
R
EXTEND
L
VALVE S
O
PIN #86
RELAY #5
CLOSED
OPEN
OPEN
OPEN
CLOSED
OPEN
OPEN
OPEN
CLOSED
CLOSED
CLOSED
CLOSED
ENERGIZED - B
O
& TRANSFER E
X
12 VOLTS
0 VOLTS
12 VOLTS
12 VOLTS
0 VOLTS
12 VOLTS
OPEN
CLOSED
OPEN
0 VOLTS
0 VOLTS
DE-ENERGIZED
& TRANSFER E
X
OPERATING
PARAMETERS
RH OUTRIGGER
SWITCH
BOOM EXTENDED TO 21'
OUTRIGGERS UP
BOOM EXTENDED TO 21'
OR FURTHER
OUTRIGGERS DOWN
& TRANSFER E
X
ENERGIZED - B
O
BOOM EXTENDED LESS
OUTRIGGERS DOWN
THAN 21'
12 VOLTS
12 VOLTS
ENERGIZED - B
O
& TRANSFER E
X
BOOM EXTENDED TO 21'
LH OUTRIGGER UP
RH OUTRIGGER DOWN
DE-ENERGIZED
& TRANSFER E
X
RH OUTRIGGER UP
LH OUTRIGGER DOWN
BOOM EXTENDED TO 21'
OPEN
CLOSED OPEN 0 VOLTS
DE-ENERGIZED
& TRANSFER E
X
0 VOLTS
S4 S6 S6 R4 R5
BOOM/TRANSFER EXTEND LOCKOUT CIRCUIT OPERATION
Boom/Transfer Extend Lockout Circuit Operation, Control Manifold Hydraulic System - Diagram 8