Hệ thống thủy lực máy xúc cat 966h

Transmission hydraulic system "h" series medium wheel loader implement hydraulic system "h" series medium wheel loader tilt control valve dump pressure compensator and load check valve proportional priority, pressure compensator steering system block

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TRANSMISSION HYDRAULIC SYSTEM

NEUTRAL

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FIRST SPEED FORWARD

Torque Torque Converter

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SECOND SPEED FORWARD

Torque Torque Converter

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SECOND SPEED REVERSE

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“H" SERIES MEDIUM WHEEL LOADER IMPLEMENT HYDRAULIC SYSTEM

HOLD

Tilt Ride Auxiliary

Inlet Cylinder Control Function

Manifold Lift Accumulator Cover Case Drain Tilt Antidrift Valve Line Relief Valves Tilt Back Pilot Solenoid Valve Tilt Spool Pressure Compensator Valve => Screen Resolver Valve Signal Relief Signal Valve Duplication Valve Dump Pilot Solenoid Valve Choke Check Valve <—_ Min Angle Tank Lift Antidrift Valve Raise Pilot Solenoid Valve Pressure Compensator Lift Spool Valve Resolver Lower / Float Pilot Solenoid Valve Valve Head End Solenoid valve Rod

End Head End

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"H" SERIES MEDIUM WHEEL LOADER TILT CONTROL VALVE

HOLD

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"H" SERIES MEDIUM WHEEL LOADER TILT CONTROL VALVE DUMP To Signal Duplication Valve

From Signal Duplication Valve

From Resolver Network

From Head End , To Rod End of Cylinder of Cylinder Pressure aos Compensator Tilt Antidrift Valve Valve Bridge Passage Line Relief

and Line Relief

Makeup Valve and Makeup Valve l nternal IP Passage Feeder

Control Spool Passage

Tilt Back Pilot Dump Pilot

Solenoid Valve Solenoid Valve

O

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PRESSURE COMPENSATOR AND LOAD CHECK VALVE

HOLD

—— To Signal Duplication Valve

From Signal Duplication Valve ZITA =—r Resolver Network ) rom Resolver Networ

From Head End of Cylinder To Rod End Load Check of Cylinder Spool " Pressure Tilt Antidrift Compensator Valve Valve Bridge Passage Line Relief and fo Line Relief and

Makeup Valve Makeup Valve

Internal Passage iD Feeder

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PRESSURE COMPENSATOR AND LOAD CHECK VALVE LOAD CHECK OPERATION

To Signal Duplication Valve

From Signal Duplication Valve

From Head End of Cylinder To Rod © Rod End E

of Cylinder Load Check Spool Tilt Antidrift Valve Pressure Compensator Valve Bridge Passage Line Relief

and Line Relief

Makeup Valve and Makeup Valve Internal Passage

9 Feeder

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PRESSURE COMPENSATOR AND LOAD CHECK VALVE PRESSURE COMPENSATOR OPERATION

To Signal Duplication Valve From Signal Duplication Valve

From Head End Load Check

sGyimde Hàm Compensator Spool

Tilt Anti-drift Valve

Valve Orifices

Line Relief

Bridge Passage

and Line Relief

Makeup Valve and Makeup Valve Int nternal IP Passage Feeder

Supply

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PROPORTIONAL PRIORITY, PRESSURE COMPENSATOR OPERATION From Signal Duplication Valve

To Pump and —> — Signal Pressure Differential

Signal Limiter \ Relief Valve

D ‡ xx xX XXX X= ì jp ‡

> L k y

Signal a Vah ver X<x~xxx== ==xx Resolver Loo KKXKKKKX

Duplication Valve Pi alve ) Valve )

| Valve A Valve B Valve C — i i > b b > O O

Spool Spool Spool

Bridged p Bridged p Feeder Bridged P

Passage ump Feeder Passage ump Passage Passage ump Feeder

Supply Passage Supply Supply Passage

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DUMP

Tilt ` Ride Auxiliary

Inlet Cylinder Control Function Manifold Lift Cylinders Accumulator Cover Manifold Manual Tilt Antidrift solenoid Valve Valve Lower Valve Lift Antidrift Valve Pilot Accumulator Raise Pilot

Solenoid Valve Solenoid Valve Head End

Tilt Back Pilot

Solenoid Valve Pressure

Compensator Ride Control

Lift Spool HE Spool Valve Relief Valve Auxiliary Spool Tilt Spool Pressure Compensator Valve -? Screen Resolver Balance Resolver Pilot Resolver Seay Valve Check Valve Valve Reducing Pressure Valve Valve Signal Relief Signal Duplication Valve - Lower / Float Control Ride

Dump Pilot Pilot

Solenoid Valve Solenoid Valve Auxiliary Rod End Margin

Solenoid Valve Relief Valve

Case | | +-, YP, A S Drain Choke Check

Filter Valve

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Inlet Manifold “H" SERIES MEDIUM WHEEL LOADER IMPLEMENT HYDRAULIC SYSTEM RAISE Tilt Cylinder Lift Cylinders Ride Control Accumulator Auxiliary Cover Manifold Tilt Antidrift Valve Manual Lower Line Relief Valves Tilt Back Pilot Solenoid Valve Tilt Spool Pressure Compensator Valve =3 Screen Resolver Valve Signal Relief Valve Signal Duplication Valve Dump Pilot Solenoid Valve Case | || — pe Ye ccc Drain <- Choke Check Filter Valve _— Min Angle Tank Lift Antidrift Valve Raise Pilot Solenoid Valve Pressure Compensator Lift Spool Valve Resolver Valve Check Valve Lower / Float Pilot Solenoid Valve Head End Solenoid Valve

Rod Head End

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FLOAT

- Ride

Tilt Control Auxiliary

Inlet Cylinder Accumulator Function

Manifold Lift Cover Cylinders Manifold

Manual Tilt Antidrift Solenoid valve Hydraulic Lockout

Lower Valve : Valve

Valve Relief Line Lift Antidrift Ta l Valves Valve Pilot

Accumulator

Rod

Raise Pilot End Solenoid Valve Solenoid

Valve

Head End Solenoid Valve

Tilt Back Pilot Pressure Solenoid Valve Compensator

ï Valve Ride Control Lift Spool p Relief Valve

Tilt Spool Auxiliary Spool Pilot Pressure Reducing Pressure Valve Compensator Valve -? Screen

Resolver Balance Resolver Resolver Valve Check Valve Valve

Valve Valve

Signal

Duplication Ride

Valve Lower / Float Control

Dump Pilot Pilot

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Inlet Manifold Manual Lower Valve =3 Screen Signal Duplication Valve Case Drain <- Filter Tank

"H” SERIES MEDIUM WHEEL LOADER IMPLEMENT HYDRAULIC SYSTEM

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“H" SERIES MEDIUM WHEEL LOADER IMPLEMENT HYDRAULIC SYSTEM HOLD / AUTO TRAVEL MORE THAN 9.7 KM/H (6 MPH)

Tilt Ride

Ị c I Auxili

Inlet Cylinder ontro Ory

Manifold Lift Accumulator Function Cylinders

7 ‘dri Head End

Manual Tilt Antidrift Solenoid Valve Pilot Shutoff

Lower Valve r ine aa Valve

Valve Relief Lift Antidrift Pilot

Valves Valve Accumulator

Raise Pilot

Solenoid Valve Solenoid Valve Head End

Tilt Back Pilot

Solenoid Valve Pressure

: Ride Control Lift Spool wpe valve Relief Valve

Tilt Spool Auxiliary Spool Pilot Pressure Pressure Reducing Compensator Valve

Valve

Resolver Balance Resolver Resolver Valve Check Valve Valve Valve Valve Signal Relief Signal Ride Duplication Control Valve Lower / Float Dump Pilot Pilot

Solenoid Valve Relief Valve

Case | || ype C7 Í, TT Drain <- Choke Check

Filter Valve

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STEERING SYSTEM BLOCK DIAGRAM HOLD Hand Metering Unit Neutralizer Valve Check Valve [ Ne anzer Steering

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"Secondary Steering Flow Control —À-—— — Back-up

Pump and Orifice Relief Valve

Motor

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STEERING SYSTEM string

GRADUAL LEFT TURN Cylinders Selector Crossover Relief Valve Spool Left Right —— — — Neutralizer Neutralizer Valve Valve Steering Pump Secondary Steering Diverter Valve || _Ì |L - )[|( |Orifices! ) || ( Hand Metering Unit — Directional

Seconday | wWI{RLAITEATIAIM hw Fg —-\-— — j}-\-— -— - — Spool

Steering Flow Control Back-up

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STEERING SYSTEM steering

FULL LEFT TURN (STEERING NEUTRALIZED) Cylinders

Left Right Selector Crossover Relief Valve

——~~——~~——~~ Neutralizer Neutralizer Spool Valve Valve "“"“—= ———~~~——~~ Steering Pump Secondary Steering Diverter Valve j| _ l :— Í ——- |) (| Orifices |) C —T1 I I l Hand Metering Unit — Directional

Secondary § ¡ Al||Èl4l|!rll4lM)›A Fi 4 —-À — —-1 —`-— — — Spool

Pump and Orifice Relief Valve

Motor

| —— —_} -4 — —_ Mechanical

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STEERING SYSTEM steering

GRADUAL LEFT TURN / SECONDARY STEERING Y/inders

Left Right Selector Crossover Relief Valve

—— — — Neutralizer Neutralizer Spool Valve Valve F TT t†t TT ==ẼŸẼỄÃÏ ` —T Steering Pump Secondary Steering Diverter Valve —¬ I l I 1ì ”1¬1 ¬¬1 i) ( |Orifices: ) C| Hand Metering Unit Directional Secondary =— — — Spool

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STEERING PILOT VALVE ay A RIGHT TURN To Steering A Control Valve a Oil Ports eh) Input Shaft 124

Connected to : AAS đ, Z4 |-~ Directional ¬Ắ

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STEERING HYDRAULIC SYSTEM (CCS) HOLD Steering Cylinders From Implement Circuit From Implement Circuit

Stering 8 Wy HR fe Ty SSIS NANG —

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STEERING HYDRAULIC SYSTEM LEFT TURN Steering Cylinders From Implement Circuit From Implement Circuit Shuttle Steering seeing CD | 7 Í | ReevS Valve Control

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BRAKE AND HYDRAULIC FAN HYDRAULIC SYSTEM ACCUMULATORS CUT IN REDUCED FAN SPEED Left Brake

Pedal Right Brake Front Brake Rear Brake

Pedal Accumulator Accumulator Accumulator Charging Valve and Fan Solenoid Valve Rear Service Brakes peor | 1 1 | 1 1 | 1 1 | 1 1 | 1 1 | 1 1 4 I Front Service Inverse Shuttle Valve Relief | Brakes Valve I I Brake Fan Solenoid Cut In Valve | ; Pressure Valve | Parking Parking Switch | Brake Brake ! Pressure Valve | Switch | J )|(— — — —->— ——- — Pump i Resolver

a š | _——- Valve Check Valve 1 ControlValve_ | _ _

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BRAKE AND HYDRAULIC FAN HYDRAULIC SYSTEM MINIMUM FAN SPEED AT CUT OUT

Left Brake Pedal Right Brake I8 Front Brake Rear Brake

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BRAKE AND HYDRAULIC FAN HYDRAULIC SYSTEM MAXIMUM FAN SPEED AT CUT OUT Left Brake

Pedal Right Brake Front Brake Rear Brake

Pedal Accumulator Accumulator Accumulator Charging Valve and Fan Solenoid Valve Rear Service

Brakes Service | Brake [Z”ZZZZzZZZzzzzze.ezs2Z22e<⁄2⁄šZ2ZZ““Z2_— — —_—T-— — — — — —-—- ¬

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Front Brake Rear Brake Accumulator Accumulator 9 9 BRAKE SYSTEM

To ; Left Brake Right Brake PARKING BRAKE RELEASED

Power Train Pedal Pedal

ECM eda — Brake Lights

CO pT

Brake

Rear Axle | /% Accumulator Pressure

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Front Brake Rear Brake

Accumulator Accumulator

9 9 BRAKE SYSTEM

To Right Brake PARKING BRAKE RELEASED

Power Train Left Brake Pedal SERVICE BRAKES APPLIED ECM Pedal j Brake Lights O | | ST xi Brake

Brakes Hydraulic Charging Switch

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SERVICE BRAKE VALVE

NOT ACTIVATED

Boot

Plunger

Return Spring Plunger Springs

Ball Retainer Shims

Ball

Upper Spool Check Valve

Front Brake Port

Tank Port

System Pressure Port ——~>

Lower Spool Upper Spool Orifice

Upper Spool Passage —— Tank Port

Rear Brake Port

System Pressure Port ——>

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SERVICE BRAKE VALVE BRAKES ACTIVATED

Boot Plunger

Return Spring Plunger Springs

Ball Retainer Shims

Ball Check Valve Upper Spool Front Brake Port Tank Port System Pressure Port Lower Spool

Upper Spool Orifice Upper Spool Passage Tank Port

Rear Brake Port

System Pressure Port

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Số trang	33
Dung lượng	1,1 MB