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EATON

EP Control for Medium Duty 72400 Piston Pumps Parts & Service 08-10-0003-EN-0901 September 2001

Troubleshooting
Reference Settings

Solenoid 4-Pin Connector

PINS

SOLENOID

12 VOLT COIL

24 VOLT COIL

A & B

Coil 1

5 ohms

21 ohms

C & D

Coil 2

5 ohms

21 ohms

Note: Only 12 volt coils are used with EP Control electronics module

Joystick Position

DC VOLTAGE MEASURED ACROSS DESIGNATED
PINS AT THE CUSTOMER THREE-PIN CONNECTOR

A to B

Full-Forward

5 Vdc

Neutral

2.5 Vdc

Full-Reverse

0 Vdc

Command Input Device – 12/24 Volt Systems (5

Ω

coils)

CURRENT TO COIL 1

CURRENT TO COIL 2

PINS A & B

PINS C & D

YELLOW & WHITE WIRES

ORANGE & BLACK WIRES

Max command in

Minimum 1.5 A

0 A

one direction

Maximum 2.0 A

0 A

Neutral

0 A

Max command in

0 A

Minimum 1.5 A

the same direction

0 A

Maximum 2.0 A

Troubleshooting

Содержание EP Control

Страница 1: ...Electronic Proportional EP Control for Medium Duty 72400 Piston Pumps Parts Service 08 10 0003 EN 0901...

Страница 2: ...0003 EN 0901 September 2001 EP Control for Medium Duty 72400 Piston Pumps Table of Contents Introduction 3 Parts and Kits 4 Tools Required 5 Disassembly 6 Reassembly 8 Neutral Adjustment 10 Interconn...

Страница 3: ...al welding on the vehicle or machine The elec tronic module and or the hydraulic pump are not to be used as a connection point for electrical welding equipment During initial start up and or checkout...

Страница 4: ...Ctrl Kit MD 72400 4 20 mA input w o brackets 4 20 mA 4993057 012 111520 020 12 24 V 9900021 000 EG EP Ctrl Kit MD 72400 4 20 mA input 4 20 mA 4993057 012 111520 020 12 24 V 9900022 000 EE EP Ctrl Kit...

Страница 5: ...0003 EN 0901 September 2001 Parts 1 8 Bit Socket or Hex Key 5 32 Bit Socket or Hex Key 9 16 Open End Wrench 3 4 Open End Wrench Flat Blade Screwdriver 12 VDC Power Supply or Battery Voltage Ohm Meter...

Страница 6: ...screws and lockwashers on top of the electronic control Disconnect the four pin connector between the EP Control module and the solenoids Caution must be used when disconnecting these connectors as t...

Страница 7: ...e assembly away from the pump to disengage the feedback link from the servo piston Note which slot the feedback link is assembled into Step 4 The two solenoid coils can be removed by turning each sole...

Страница 8: ...be necessary to remove the control orifices that are staked in the pump housing Only remove if the orifice size needs to be changed The orifice size is stamped on the flat plate orifices in the press...

Страница 9: ...wide land for the swashplate follower Replace and hand tighten the six 10 24 hex head cap screws Step 11 Locate the new solenoid tube subassembly Each solenoid tube subassembly comes with new O rings...

Страница 10: ...ation before attempting to check neutral adjustment Electrical wiring harnesses for the solenoid coils and command input should be left disconnected while adjusting neutral A Disengage the input drive...

Страница 11: ...ally 40 60 psig lower than the high setting G Rotate the neutral adjustment screw counterclockwise The charge pressure will rise Continue turning counterclock wise until the pressure drops again to it...

Страница 12: ...68 lbf in Step 17 Connect the four pin connectors between the EP Control electronic module and the solenoid coils The connectors must be latched securely Step 20 Power should still be disconnected to...

Страница 13: ...1 to 6 Vdc Potentiometric B Green Command wiper C Red Ref Hi 6 Vdc A Orange Loop Return 4 to 20 mA Current Loop B White Loop In C No Connection Required EP Control Electronic Module Mating Connector K...

Страница 14: ...readings Defective Check Electronic Module Disconnect the two pin power supply and the three pin Electronic Module command input device connectors from the EP Control electronic module Inspect the co...

Страница 15: ...or potentiometer is used measure the DC voltage across pins A and B at the connector Move the joystick or potentiometer position The voltage reading will be approximately 2 5 volts DC at joystick neu...

Страница 16: ...move the spool Does Not Return Command Signal Check Command Input Signal Disconnect the three pin command input device to Neutral Incorrect connector from the EP Control electronic module Inspect the...

Страница 17: ...P Control electronics module Joystick Position DC VOLTAGE MEASURED ACROSS DESIGNATED PINS AT THE CUSTOMER THREE PIN CONNECTOR A to B Full Forward 5 Vdc Neutral 2 5 Vdc Full Reverse 0 Vdc Command Input...

Страница 18: ...ACCREDITED BY THE DUTCH COUNCIL FOR CERTIFICATION Reg No 24 Quality System Certified Products in this publication are manufactured in an ISO 9001 certified site Eaton 14615 Lone Oak Road Eden Prairie...

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