Torque
Converter
Inlet Relief
Valve
Filter
Transmission
Pump
Tank
Main Relief Valve
Torque
Converter
Power Train
ECM
4
5
6
2
1
Torque Converter
Outlet Relief Valve
To
Transmission
Bearing
Lubrication
3
2
3
Modulating
Valve
Modulating
Valve

Inlet Relief
Valve
Filter
Transmission
Pump
Tank
Main Relief Valve
Torque
Converter
Power Train
ECM
4
5
3
3
Modulating
Valve
1
Torque Converter
Outlet Relief Valve
To
Transmission
Bearing
Lubrication
Modulating
Valve
1
4
Modulating
Valve

Converter
Inlet Relief
Valve
Filter
Transmission
Pump
Tank
Main Relief Valve
Torque
Converter
Power Train
ECM
4
5
5
Modulating
Valve
SECOND
SPEED
3
3
Modulating
Valve
1
Torque Converter
Outlet Relief Valve
To
Transmission
Bearing
Lubrication

Inlet Relief
Valve
Filter
Transmission
Pump
Tank
Main Relief Valve
Torque
Converter
Power
Train
ECM
4
5
5
Modulating
Valve
SECOND
SPEED
3
3
Modulating
Valve
1
Torque Converter
Outlet Relief Valve
To
Transmission
Bearing
Lubrication

Control
Accumulator
Auxiliary
Function
Tank
Hydraulic Lockout
Valve
Steering
Pilot
Supply
(CCS Only)
Margin
(Pressure
differential)Relief Valve
Pilot
Accumulator
Pilot
Pressure
Reducing
Valve
Signal
Duplication
Valve
Signal
Relief
Valve
Manual
Lower
Valve
Tilt Antidrift

Resolver
Valve
Re so lv e r
Valve
Re so lv e r
Valve
Pressure
Compe nsat or
Valve
Auxiliary Rod End
Solenoid Valve
Auxiliary
Head End
Solenoid Valve
Cover
Manifold
Inlet
Manifold
Pressure
Compensator
Valve
Auxiliary Spool
Ride
Control
Head End
Solenoid valve
Rod
End
Solenoid
Valve

Passage
To Signal Duplication Valve
From Resolver Valves
Rackback Pilot
Solenoid Valve
Dump Pilot
Solenoid Valve
To / From Head End
of Cylinder
"H" SERIES MEDIUM WHEEL LOADER TILT CONTROL VALVE
HOLD
From Signal Duplication Valve
To Rod End
of Cylinder
Pressure
Compensat or
Valve
Line Relief
and
Makeup Valve
Bridge Passage
Tilt Antidrift
Valve
Feeder
Passage
Internal Passage
Control Spool
Line Relief
and
Makeup Valve

Supply
Passage
To Signal Duplication Valve
From Resolver Network
Tilt Back Pilot
Solenoid Valve
Dump Pilot
Solenoid Valve
From Head End
of Cylinder
PRESSURE COMPENSATOR AND LOAD CHECK VALVE
HOLD
Pressure
Compensator
Valve
From Signal Duplication Valve
To Rod End
of Cylinder
Load Check
Spool
Line Relief
and
Makeup Valve
Bridge Passage
Tilt Antidrift
Valve
Feeder
Passage
Internal Passage
Control Spool

Passage
Internal Passage
Control Spool
Line Relief
and
Makeup Valve
Supply
Passage
To Signal Duplication Valve
From Resolver Network
Tilt Back Pilot
Solenoid Valve
Dump Pilot
Solenoid Valve
From Head End
of Cylinder
PRESSURE COMPENSATOR AND LOAD CHECK VALVE
PRESSURE COMPENSATOR OPERATION
Pressure
Compensator
Valve
Orifices
Pump
Supply
Spool
Signal
Valve A Valve B
Valve C
HOLD LOW PRESSURE HIGH PRESSURE
To Pump and

Spool
Spool
"H" SERIES MEDIUM WHEEL LOADER IMPLEMENT HYDRAULIC SYSTEM
DUMP
Lift
Cylinders
Tilt
Cylinder
Ride
Control
Auxiliary
Function
Tank
Hydraulic Lockout
solenoid Valve
Margin
Relief Valve
Pilot
Accumulator
Pilot
Pressure
Reducing
Valve
Signal
Duplication
Valve
Signal
Relief
Valve
Manual

Relief
Valves
Screen
Tilt Spool
Lift Spool
Pressure
Compensator
Valve
Resolver
Valve
Re so lv e r
Valve
Re so lv e r
Valve
Pressure
Compe nsat or
Valve
Auxiliary Rod End
Solenoid Valve
Auxiliary
Head End
Solenoid Valve
Auxiliary
Spool
Inlet
Manifold
Cover
Manifold
Min Angle
Ride

Valve
Signal
Duplication
Valve
Signal
Relief
Valve
Manual
Lower
Valve
Tilt Antidrift
Valve
Case
Drain
Filter
Balance
Valve
Ride Control
Relief Valve
Choke Check
Valve
Pump
and
Pump
Control
Valve
Dump Pilot
Solenoid Valve
Lower / Float
Pilot

Lift Antidrift
Valve
Inlet
Manifold
Cover
Manifold
Min Angle
Balance
Solenoid
Valve
Head End
Solenoid Valve
Rod
End
Solenoid
Valve
Che ck Valve
Ride Control
Accumulator