Hydraulic System
8.66
Model 644E-42/944E-42
Rev. 6/04
8.8.6
Joystick Circuit & Troubleshooting (Single Joystick)
(Refer to Section 8.8.49, “Joystick Circuit Description (Single Joystick),” for a more detailed explanation of
this circuit.)
Suction
Return
Load Sense
Pressure
Pilot Pressure
RETURN
FILTER
25 PSI
(1,7 BAR)
BYPASS
CHECK
VALVE
SINGLE
JOYSTICK
PILOT
SELECT
VALVE
P1
TB
TA
AUX2
AUX1
EB
EA
HB
HA
CTB
CTA
T
P
P2 P3 P4
SINGLE
JOYSTICK
HYDRAULIC OIL
COOLER
CHECK VALVE
85 PSI (5,9 bar)
HYDRAULIC
RESERVOIR
1
3
T
P
4
2
MAIN CONTROL
VALVE
INLET
OUTLET
ATTACH
TILT
FRAME
EXT/RET
LFT/LWR
AU
X
TRANS
PUMP
ACCUMULATOR
CHARGE/SECONDARY
FUNCTION VALVE
LS
DRAIN
P1
LSG
ACR
SW
P
ACF
EF
CF
PIL
PB
PBG
PPG
SW
MU5380
Pressure
Reducing
Cartridge
“PPG”
Pressure
Tap
“P1”
Pressure
Tap
Summary of Contents for 944E-42
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Page 102: ...Boom 3 56 Model 644E 42 944E 42 Rev 6 04 This Page Intentionally Left Blank...
Page 139: ...4 37 Model 644E 42 944E 42 Rev 6 04 Cab and Covers This Page Intentionally Left Blank...
Page 144: ...Cab and Covers 4 42 Model 644E 42 944E 42 Rev 6 04 This Page Intentionally Left Blank...
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Page 501: ...8 251 Model 644E 42 944E 42 Rev 6 04 Hydraulic System MT1950 2 3 4 5 6 7 8 5 5...
Page 507: ...8 257 Model 644E 42 944E 42 Rev 6 04 Hydraulic System MT1950 1 2 3 4 5 6 7 4 4...
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Page 525: ...9 17 Model 644E 42 944E 42 Rev 6 04 Electrical System This Page Intentionally Left Blank...
Page 554: ...Electrical System 9 46 Model 644E 42 944E 42 Rev 6 04 This Page Intentionally Left Blank...
Page 759: ...10 3 Model 644E 42 944E 42 Rev 6 04 Stabil TRAK System This Page Intentionally Left Blank...
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Page 800: ...Stabil TRAK System 10 44 Model 644E 42 944E 42 Rev 6 04 This Page Intentionally Left Blank...
Page 832: ...Transfer Carriage 11 32 Model 644E 42 944E 42 Rev 6 04 This Page Intentionally Left Blank...
Page 840: ...12 8 Model 644E 42 944E 42 Rev 6 04 Index...
Page 841: ...Accident Prevention Tags OS2180 8990403 Origin 5 00 Accident Prevention Tags...
Page 842: ...Accident Prevention Tags OS2180 8990403 Origin 5 00...
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