Terex GS90D-4695 Installation and operating manual

Service and Repair Manual
Serial Number Range
GS™-3390
from GS90D-4695
from GS90M-
101
This manual includes:
Repair procedures
Fault Codes
Electrical and
Hydraulic Schematics
GS™-4390
GS™-5390
For detailed maintenance
procedures, refer to the
appropriate Maintenance
Manual for your machine.
Original Instructions
Part No. 132
5652GT
Rev A
1
December 2023

Service and Repair Manual December 2023
Introduction
ii GS™-3390 • GS™-4390 • GS™-5390 Part No. 1325652GT
Intr od ucti o n Intr od ucti o n
Important
Read, understand and obey the safety rules and
operating instructions in the appropriate Operator's
Manual on your machine before attempting any
procedure.
This manual provides troubleshooting and repair
procedures for qualified service professionals.
Basic mechanical, hydraulic and electrical skills
are required to perform most procedures.
However, several procedures require specialized
skills, tools, lifting equipment and a suitable
workshop. In these instances, we strongly
recommend that maintenance and repair be
performed at an authorized Genie dealer service
center.
Compliance
Machine Classification
Group A/Type 3 as defined by ISO 16368
Machine Design Life
Unrestricted with proper operation, inspection and
scheduled maintenance.
Technical Publications
Genie has endeavored to deliver the highest
degree of accuracy possible. However, continuous
improvement of our products is a Genie policy.
Therefore, product specifications are subject to
change without notice.
Readers are encouraged to notify Genie of errors
and send in suggestions for improvement. All
communications will be carefully considered for
future printings of this and all other manuals.
Contact Us:
Internet: www.genielift.com
E-mail: [e-mail]
Find a Manual for this Model
Go to https://www.genielift.com
Use the links to locate Service Manuals,
Maintenance Manuals, Service and Repair
Manuals, Parts Manuals and Operator's Manuals.
Copyright © 2016 by Terex Corporation
1325652GT Rev A, August 2023
Third Edition, First Printing
Genie is a registered trademark of Terex South Dakota, Inc. in
the U.S.A. and many other countries.
“GS” is a trademark of Terex South Dakota, Inc.

December 2023 Service and Repair Manual
Introduction
Part No. 1325652GT GS™-3390 • GS™-4390 • GS™-5390 iii
Revision History
Revision Date Section Procedure / Page / Description
A 8/2023 Initial Release
A
1 12/2023 Front cover Add facility code and serial break
Reference Examples:
Electronic Version
Click on any content or procedure in the Table of Contents to view
the update.
Section – Repair Procedure, 4-2
Section – Fault Codes, All charts
Section – Schematics, Legends and schematics

Service and Repair Manual December 2023
Introduction
iv GS™-3390 • GS™-4390 • GS™-5390 Part No. 1325652GT
Serial Number Legend
1 Model
2 Facility code
3 Sequence number
4 Serial number, (stamped on chassis)
5 Serial label, (located inside cover)

December 2023 Service and Repair Manual
Safety Rules
Part No. 1325652GT GS™-3390 • GS™-4390 • GS™-5390 v
Section 1 Safet y R ul es
Danger
Failure to obey the instructions and safety rules in
this manual and the appropriate Operator's Manual
on your machine will result in death or serious
injury.
Many of the hazards identified in the operator's
manual are also safety hazards when
maintenance and repair procedures are
performed.
Do not modify or alter a MEWP without prior
written permission from the manufacturer.
Do Not Perform Maintenance
Unless:
You are trained and qualified to perform
maintenance on this machine.
You read, understand and obey:
•manufacturer's instructions and safety rules
•employer's safety rules and worksite
regulations
•applicable governmental regulations
You have the appropriate tools, lifting
equipment and a suitable workshop.

Service and Repair Manual December 2023
Safety Rules
vi GS™-3390 • GS™-4390 • GS™-5390 Part No. 1325652GT
Personal Safety
Any person working on or around a machine must
be aware of all known safety hazards. Personal
safety and the continued safe operation of the
machine should be your top priority.
Read each procedure thoroughl
y. This
manual and the decals on the machine,
use signal words to identify the following:
Safety alert symbol
—used to
alert personnel to potential
personal injury hazards. Obey all
safety messages that follow this
symbol to avoid possible injury or
death.
Indicates a imminently hazardous
situation which, if not avoided,
will result in death or serious
injury.
Indicates a potentially hazardous
situation which, if not avoided,
could result in death or serious
injury.
Indicates a potentially ha
zardous
situation which, if not avoided,
may cause minor or moderate
injury.
Indicates a potentially hazardous
situation which, if not avoided,
may result in property damage.
Be sure to wear protective eye wear and
other protective clothing if the
situation
warrants it.
Be aware of potential crushing hazards
such as moving parts, free swinging or
unsecured components when lifting or
placing loads. Always wear approved
steel
-toed shoes.
Workplace Safety
Any person working on or around a machine must
be aware of all known safety hazards. Personal
safety and the continued safe operation of the
machine should be your top priority.
Be sure to keep sparks, flames and
lighted tobacco away from flammable and
combustible materials like battery
gases
and engine fuels. Always have an
approved fire extinguisher within easy
reach.
Be sure that all tools and working areas
are properly maintained and ready for
use. Keep work surfaces clean and free
of debris that could get into machine
components a
nd cause damage.
Be sure any forklift, overhead crane or
other lifting or supporting device is fully
capable of supporting and stabilizing the
weight to be lifted. Use only chains or
straps that are in good condition and of
ample capacity.
Be
sure that fasteners intended for one
time use (i.e., cotter pins and self
-locking
nuts) are not reused. These components
may fail if they are used a second time.
Be sure to properly dispose of old oil or
other fluids. Use an approved
container.
Please be environmentally safe.
Be sure that your workshop or work area
is properly ventilated and well lit.

December 2023
Table of Contents
Part No. 1325652GT GS™-3390 • GS™-4390 • GS™-5390 vii
Introduction Introduction...........................................................................................................ii
Important Information ............................................................................................. ii
Find a Manual for this Model .................................................................................. ii
Revision History..................................................................................................... iii
Serial Number Legend .......................................................................................... iv
Section 1 Safety Rules ..........................................................................................................v
General Safety Rules ............................................................................................. v
Section 2 Specifications .......................................................................................................1
Machine Specifications...........................................................................................1
Performance Specifications....................................................................................1
Hydraulic Oil Specifications....................................................................................2
Hydraulic Component Specifications......................................................................4
Manifold Component Specifications .......................................................................6
Ford MSG-425 EFI Engine Specifications .............................................................6
Deutz D2011 L03i Engine Specifications ...............................................................8
Deutz D436 L3i Engine Specifications ...................................................................9
Deutz TD 2.2 L3 Engine Specifications................................................................10
Deutz D 2.9 L4 Tier IV Engine Specifications ......................................................12
Deutz D 2.9 L4 Stage IV Engine Specifications ...................................................13
Weichai WP3.2 Engine Specifications .................................................................14
Hydraulic Hose and Fitting Torque Specifications ...............................................15
Torque Procedure ................................................................................................16

December 2023
Table of Contents
viii GS™-3390 • GS™-4390 • GS™-5390 Part No. 1325652GT
Section 3 Repair Procedures..............................................................................................18
Introduction ...........................................................................................................18
Platform Controls ...............................................................................................20
1-1 Circuit Board...................................................................................................20
How to Remove the Platform Controls Circuit Board ......................................20
Platform Components ........................................................................................21
2-1 Platform ..........................................................................................................21
How to Remove the Platform ..........................................................................21
2-2 Platform Extension Deck ................................................................................23
How to Remove the Platform Extension Deck ................................................23
Scissor Components..........................................................................................24
3-1 Scissor Assembly, GS-3390...........................................................................25
How to Disassemble the Scissor Assembly ....................................................25
How to Disassemble a Scissor Arm Pair.........................................................29
3-2 Scissor Assembly, GS-4390...........................................................................31
How to Disassemble the Scissor Assembly ....................................................31
How to Disassemble a Scissor Arm Pair.........................................................35
3-3 Scissor Assembly, GS-5390...........................................................................38
How to Disassemble the Scissor Assembly ....................................................38
How to Disassemble a Scissor Arm Pair.........................................................43
3-4 Wear Pads......................................................................................................44
How to Replace the Scissor Arm Wear Pad ...................................................44
How to Replace the Chassis Scissor Arm Wear Pads....................................45
3-5 Lift Cylinders...................................................................................................47
How to Remove the Lift Cylinder - GS-3390, GS-4390 ..................................47
How to Remove the Lift Cylinder - GS-5390 ...................................................49
3-6 Height Angle Sensor ......................................................................................51
How to Replace the Height Angle Sensor .......................................................51

December 2023
Table of Contents
Part No. 1325652GT GS™-3390 • GS™-4390 • GS™-5390 ix
Engines................................................................................................................52
4-1 RPM Adjustment ............................................................................................52
4-2 Flex Plate .......................................................................................................52
How to Remove the Flex Plate - Ford Models ................................................52
How to Remove the Flex Plate - Deutz, Weichai Models ...............................53
How to Install the Flex Plate............................................................................54
4-3 Ford MSG-425 Engine Fault Codes...............................................................55
4-4 Engine Fault Codes - Deutz TD 2.2 L3 Models .............................................56
4-5 Engine Fault Codes - Deutz D 2.9 L4, Weichai WP3.2 Models.....................56
4-6 Diesel Particle Filter Regeneration - Deutz TD 2.2 L3 ...................................57
Ground Controls.................................................................................................58
5-1 Auxiliary Platform Lowering............................................................................58
5-2 Controller Adjustments...................................................................................58
How to Determine the Revision Level .............................................................59
How to Adjust the Stowed Drive Speed ..........................................................59
How to Adjust the High Torque Drive Speed ..................................................60
How to Adjust the Raised Drive Speed ...........................................................61
How to Adjust the Lift Speed...........................................................................63
How to Adjust the Platform Lower Speed .......................................................64
How to Adjust the Platform Settling Speed .....................................................65
How to Adjust the Steer Speed .......................................................................66
5-3 Software Configuration...................................................................................66
5-4 Level Sensor - Models without Outriggers .....................................................71
How to Install and Calibrate the Level Sensor - Models without Outriggers...71
5-5 Level Sensor - Models with Outriggers ..........................................................73
How to Install and Calibrate the Level Sensor - Models with Outriggers........73

December 2023
Table of Contents
x GS™-3390 • GS™-4390 • GS™-5390 Part No. 1325652GT
Hydraulic Pump ..................................................................................................77
6-1 Lift/Steer Pump...............................................................................................77
How to Remove the Lift/Steer Pump...............................................................77
6-2 Drive Pump.....................................................................................................78
How to Remove the Drive Pump .....................................................................78
How to Prime the Drive Pump .........................................................................79
How to Adjust the Pump Neutral .....................................................................79
Manifolds .............................................................................................................81
7-1 Function Manifold Components - Models with Outriggers .............................81
7-2 Function Manifold Components - Models without Outriggers ........................83
7-3 Traction Manifold Components ......................................................................85
7-4 Oscillate Manifold Components, GS-90 (option)............................................87
7-5 Welder Manifold Components (option)...........................................................89
7-6 Valve Adjustments - Function Manifold..........................................................90
How to Adjust the System Relief Valve...........................................................90
How to Adjust the Steer Relief Valve ..............................................................91
7-7 Valve Adjustments - Traction Manifold...........................................................92
How to Adjust the Charge Pressure Relief Valve............................................92
7-8 Generator Manifold Components ...................................................................93
7-9 Valve Adjustments - Generator Manifold .......................................................94
How to Adjust the Generator Voltage..............................................................94
7-10 Generator Relief Valve Manifold Components.............................................95
7-11 Valve Coils ...................................................................................................96
Fuel and Hydraulic Tanks ..................................................................................98
8-1 Fuel Tank........................................................................................................98
8-2 Hydraulic Tank ...............................................................................................99

December 2023
Table of Contents
Part No. 1325652GT GS™-3390 • GS™-4390 • GS™-5390 xi
Steer Axle Components...................................................................................101
9-1 Yoke Assembly ............................................................................................101
How to Remove the Yoke and Drive Motor...................................................101
How to Remove a Drive Motor ......................................................................102
9-2 Steer Cylinder ..............................................................................................103
9-3 Oscillating Axle Option - GS-90 Models.......................................................103
Non-steer Axle Components...........................................................................105
10-1 Drive Motor and Brake ...............................................................................105
How to Remove a Drive Motor and Brake ....................................................105
10-2 Drive Hub ...................................................................................................106
How to Remove a Drive Hub.........................................................................106
10-3 Oscillating Axle...........................................................................................106
Outrigger Components ....................................................................................107
11-1 Outrigger Cylinder ......................................................................................107
How to Remove an Outrigger Cylinder (if equipped) ....................................107
Platform Overload Components .....................................................................108
12-1 Platform Overload System (if equipped) ....................................................108
How to Calibrate the Platform Overload System (if equipped) .....................108
12-2 Platform Overload Recovery Message ......................................................110
12-3 Down Limit Height ......................................................................................111
How to Calibrate the Down Limit Height .......................................................111

December 2023
Table of Contents
xii GS™-3390 • GS™-4390 • GS™-5390 Part No. 1325652GT
Section 4 Fault Codes .......................................................................................................113
Introduction .........................................................................................................113
Control System Fault Codes ...........................................................................114
Platform Overload Fault Codes.......................................................................119
Fault Code Display - Deutz Models.................................................................124
How to Retrieve Active Engine Fault Codes Deutz D 2.9 L4 Models ...........124
How to Retrieve Active Engine Fault Codes -
Deutz TD 2.2 L3, D 2.9 L4 Stage IV Models .........................................125
Fault Code Display - Flashing and Solid LED's - Deutz D 2.9 L4 Models ....126
Soft Key Functions and Icons - Deutz D 2.9 L4 Models ...............................127
Soft Key Functions and Icons - Deutz TD 2.2 L3 Models .............................128
Main Menu Structure - Deutz D 2.9 L4 Tier IV Models .................................129
Main Menu Structure - Deutz TD 2.2 L3 Models...........................................130
Deutz D 2.9 L4 Tier IV Engine Fault Codes ....................................................131
Deutz TD 2.2 L3, D/TD 2.9 L4 Stage IV Engine Fault Codes .........................142
Deutz D436 L3i Engine Fault Codes ...............................................................152
Ford MSG-425 Engine Fault Codes ................................................................154
How to Retrieve Ford Engine Fault Codes....................................................154
How to Clear Engine Fault Codes from the ECM..........................................154
Ford MSG-425 Engine Fault Codes ...................................................................155
Fault Code Display - Weichai Models.............................................................160
How to Retrieve Active Engine Fault Codes - Weichai WP3.2 Models.........160
Main Menu Structure - Weichai WP3.2 Models ............................................161
Weichai WP3.2 Engine Fault Codes ...............................................................162

December 2023
Table of Contents
Part No. 1325652GT GS™-3390 • GS™-4390 • GS™-5390 xiii
Section 5 Schematics........................................................................................................165
Introduction.........................................................................................................165
Electrical Symbols Legend .................................................................................166
Hydraulic Symbols Legend.................................................................................167
Electrical Component and Wire Color Legends .................................................168
Ford Engine Relay Layout..................................................................................170
Electronic Control Module Layout ......................................................................171
Electronic Control Module Pin-Out Legend........................................................172
Ground Controls Wiring Panel Layout................................................................174
Wiring Diagram - Platform Control Box ..............................................................175
Limit Switch Legend ...........................................................................................176
Wiring Diagram - 12 kW Hydraulic Generator (option).......................................177
Electrical Schematics - Engine Harness........................................................179
Ford MSG-425 EFI Engine Wire Harness ..........................................................180
Deutx D 2.9 L4 Tier IV Engine Wire Harness.....................................................181
Deutz D 2.9 L4 Stage IV Engine Wire Harness .................................................184
Deutz TD 2.2 L3 Engine Wire Harness ..............................................................188
Weichai WP3.2 Engine Wire Harness................................................................191

December 2023
Table of Contents
xiv GS™-3390 • GS™-4390 • GS™-5390 Part No. 1325652GT
Electrical Schematics – ANSI and CSA Models ............................................193
Electrical Schematic, Ford Engine Models (ANSI/CSA) ....................................194
Electrical Schematic, Deutz Engine Models (ANSI/CSA) ..................................198
Electrical Schematic, SCON (ANSI/CSA) ..........................................................201
Electrical Schematics – AS and CE Models...................................................203
Electrical Schematic, Ford Engine Models (AS/CE)...........................................204
Electrical Schematic, Deutz and Weichai Engine Models (AS/CE)....................208
Electrical Schematic, SCON (AS/CE) ................................................................211
Hydraulic Schematics ......................................................................................213
Hydraulic Schematic...........................................................................................214

December 2023 Service and Repair Manual
Specifications
Part No. 1325652GT GS™-3390 • GS™-4390 • GS™-5390 1
Section 2 Speci fi c ati ons
Machine Specifications
Fluid capacities
Hydraulic tank 30 gallons
114 l
iters
Hydraulic system (including tank)
GS-3390
37.5 gallons
142 l
iters
Hydraulic system (including tank)
GS-4390
38.25 gallons
145 l
iters
Hydraulic system (including tank)
GS-5390
38.75 g
allons
147 l
iters
Fuel tank 20 g
allons
76 l
iters
Tires and wheels
High Flotation, foam-filled
Tire size 33/16LL500
Tire ply rating 10
Tire diameter x width 33 in x 16 in
83.8 cm x 41 cm
Wheel diameter x width 19.5 in x 14 in
49.5 cm x 35.6 cm
Tire weight 413 lbs (+/- 10 lbs)
187 kg (+/- 4.5 kg)
Rough Terrain, foam-filled
Tire size
315/55D20
Tire ply rating 12
Tire diameter x width 32.5 in x 12.5 in
82.6 cm x 31.8 cm
Wheel diameter x width 20 in x 11 in
50.8 cm x 28 cm
Tire weight 265 lbs
120 kg
Tires and wheels
Wheel lugs 9 @ 5/8-18
Lug nut torque, dry 125 ft-lbs
169.5 Nm
Lug nut torque, lubricated 94 ft-lbs
127.4 Nm
Performance Specifications
Drive speed, maximum
Platform stowed 5 mph
40 ft / 5.5 sec
8 km/h
12.2 m / 5.5 s
ec
Platform raised 0.7 mph
40 ft / 39 sec
1.1 km/h
12.2 m / 39 sec
Braking distance, maximum
High range on paved
surface
60 in
152.4 cm
Gradeability See Operator's Manual
Function speeds, maximum from platform controls
GS-3390
Platform up
Platform down
40 - 50 seconds
24 - 34 seconds
GS-4390
Platform up
Platform down
40 - 50 seconds
34 - 44 seconds
GS-5390
Platform up
Platform down
55 - 65 seconds
44 - 54 seconds

Service and Repair Manual December 2023
Specifications
2 GS™-3390 • GS™-4390 • GS™-5390 Part No. 1325652GT
Hydraulic Oil Specifications
Hydraulic Fluid Specifications
Genie specifications require hydraulic oils which are
designed to give maximum protection to hydraulic
systems, have the ability to perform over a wide
temperature range, and the viscosity index should
exceed 140. They should provide excellent antiwear,
oxidation prevention, corrosion inhibition, seal
conditioning, and foam and aeration suppression
properti
es.
Cleanliness level,
minimum
ISO 15/13
Water content,
maximum
250 p
pm
Recommended Hydraulic Fluid
Hydraulic oil type
Chevron Rando HD Premium
ISO Grade
32
Viscosity index,
maximum
200
Optional Hydraulic Fluids
Mineral based
Shell Tellus S2 V 32
Shell Tellus S2 V 46
Shell Tellus S4 VX 32
Shell Donax TG (Dexron III)
Chevron 5606A
Biodegradable
Petro Canada Environ MV
46
Fire resistant
UCON Hydrolube HP-
5046
Note: Genie specifications require additional
equipment and special installation instructions for
the approved optional fluids. Consult Genie
Product Support before use.
Optional fluids may not have
the same hydraulic lifespan and
may result in component
damage.
Note: Extended machine operation can cause the
hydraulic fluid temperature to increase beyond its
maximum allowable range. If the hydraulic fluid
temperature consistently exceeds 200°F / 90°C an
optional oil cooler may be required.
Do not top off with incompatible
hydraulic fluids. Hydraulic fluids
may be incompatible due to the
differences in base additive
chemistry. When incompatible
fluids are mixed, insoluble
materials may form and deposit
in the hydraulic system,
plugging hydraulic lines, filters,
control valves and may result in
component damag
e.
Note: Do not operate the machine when the
ambient air temperature is consistently above
120°F / 49°C.
Hydraulic Fluid Temperature
Range
Ambient air temperature
1 Chevron hydraulic oil 5606A
2 Petro-Canada Environ MV 46
3 UCON Hydrolube HP-5046D
4 Chevron Rando HD premium oil MV

December 2023 Service and Repair Manual
Specifications
Part No. 1325652GT GS™-3390 • GS™-4390 • GS™-5390 3
Chevron Rando HD Premium Oil
MV Fluid Properties
ISO Grade
32
Viscosity index, maximum
200
Kinematic Viscosity, maximum
cSt @ 200°F / 100°C
cSt @ 104°F / 40°C
7.5
33.5
Brookfield Viscosity, maximum
cP @
-4°F / -20°C
cP @
-22°F / -30°C
1040
3310
Flash point
375°F / 190°C
Pour point
-58°F / -
50°C
Maximum continuous operating
temperature
171°F / 77°C
Note: A hydraulic oil heating system is
recommended when the ambient temperature is
consistently below 0°F / -18°C.
Note: Do not operate the machine when the
ambient temperature is below -20°F / -29°C with
Rando HD Premium MV.
Chevron 5606A Hydraulic Oil
Fluid Properties
ISO Grade
15
Viscosity index, maximum
300
Kinematic Viscosity, maximum
cSt @ 200°F / 100°C
cSt @ 104°F / 40°C
cSt @
-40°F / -40°C
5.5
15.0
510
Flash point
180°F / 82°C
Pour point
-81°F / -
63°C
Maximum continuous operating
temperature
124°F / 51°C
Note: Use of Chevron 5606A hydraulic fluid, or
equivalent, is required when ambient temperatures
are consistently below 0°F / -17°C unless an oil
heating system is used.
Continued use of Chevron
5606A hydraulic fluid, or
equivalent, when ambient
temperatures are consistently
above 32°F / 0°C may result in
component damage
Petro-Canada Environ MV 46
Fluid Properties
ISO Grade
46
Viscosity index, maximum
154
Kinematic Viscosity, maximum
cSt @ 200°F / 100°C
cSt @ 104°F / 40°C
8.0
44.4
Flash point
482°F / 250°C
Pour point
-49°F / -
45°C
Maximum continuous
operating
temperature
180°F / 82°C

Service and Repair Manual December 2023
Specifications
4 GS™-3390 • GS™-4390 • GS™-5390 Part No. 1325652GT
Shell Tellus S4 VX Fluid
Properties
ISO Grade
32
Viscosity index, maximum
300
Kinematic Viscosity, maximum
cSt @ 200°F / 100°C
cSt @ 104°F / 40°C
9
33.8
Brookfield Viscosity, maximum
cSt @
-4°F / -20°C
cSt @
-13°F / -25°C
cSt @
-40°F / -40°C
481
702.4
2624
Flash point
>100
Pour point
-76°F / -
60°C
Maximum continuous operating
temperature
103°F / 75°C
UCON Hydrolube HP-5046 Fluid
Properties
ISO Grade
46
Viscosity index, maximum
192
Kinematic
Viscosity, maximum
cSt @ 149°F / 65°C
cSt @ 104°F / 40°C
cSt @ 0°F /
-18°C
22
46
1300
Flash point
None
Pour point
-81°F / -
63°C
Maximum continuous operating
temperature
189°F / 87°C
Hydraulic Component
Specifications
Drive Pump
Type: bi-directional variable displacement piston pump
Flow rate @ 2500 rpm 0 - 32.5 gpm
0 - 123 L/min
Drive pressure, maximum 3750 psi
258.6 bar
Charge Pump
Type Gerotor
Flow rate @ 2500 rpm 9.1 gpm
34.4 L/min
Charge pump pressure 325 psi
22.4 bar
Function Pump
Type gear pump
Displacement
0.98 c
u in
16 cc
Flow rate @ 2500 rpm 10.6 gpm
40.1 L/min
Hydraulic tank return line filter 10 micron with 25 p
si
/ 1.7 bar bypass
Auxiliary power unit
Relief valve 3700 psi
255 bar

December 2023 Service and Repair Manual
Specifications
Part No. 1325652GT GS™-3390 • GS™-4390 • GS™-5390 5
Function manifold
System relief valve pressure,
maximum, GS-3390
2700 - 2900 psi
186 - 200 bar
System relief valve pressure,
maximum, GS-4390, GS-5390
2900 - 3100 psi
200 - 214 bar
Steer relief valve pressure 1950 - 2250 psi
135 - 155 bar
Proportional valve flow regulator 0.1 gpm
0.4 L/min
Drive manifold
Hot oil relief pressure 280 psi
19 bar
Drive Motors
Displacement (2 speed motor) 0.54 - 1.52 cu in
8.8 - 25 cc
Drive hubs
Fluid capacity 26 fl oz
769 cc
Fluid type: SAE 90 multipurpose hypoid gear oil API
service classification GL5
Installation torque, lubricated 180 ft-lbs
244 Nm
Oscillate manifold (option)
System relief valve pressure,
maximum
3500 psi
241 bar
Float relief valve pressure 900 psi
62 bar
Oscillate flow regulator 1 gpm
3.8 L/min
Generator manifold (option)
Relief valve 2400 psi
165.5 bar
Flow rate, maximum 4.3 gpm
16.3 L/min
Welder manifold (option)
Relief valve 270 psi
18.6 bar
Hydraulic motor (welder option)
Displacement 1.28 cu in
21 cc

Service and Repair Manual December 2023
Specifications
6 GS™-3390 • GS™-4390 • GS™-5390 Part No. 1325652GT
Manifold Component
Specifications
Plug torque
SAE No. 2
36 in-
lbs / 4 Nm
SAE No. 4
10 ft-
lbs / 13 Nm
SAE No. 6
14 ft-
lbs / 19 Nm
SAE No. 8
38 ft-
lbs / 51 Nm
SAE No. 10
41 ft-lbs / 55
Nm
SAE No. 12
56 ft-
lbs / 76 Nm