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Eaton Electrical 350 Symptom: Neutral Difficult or Impossible to Find

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40 EATON 350 Series Dual Path Mobile Pumps E-PUPI-TS006-E September 2007

Troubleshooting

Fault - Logic Troubleshooting

Inspect

Control Valve Inspect

Servo piston

Repair

Replace

Defective

Ok Ok

142

Replace

Pump

Symptom: Neutral Difficult or Impossible to Find

Inspect

External

Control Linkage

Repair

Replace

Defective

Repair

Replace

Inspect

Heat

Exchanger

Inspect Heat

Exchanger

Bypass Valve

(If used)

Repair

Replace

Defective

Ok Ok

765

Symptom: System Operating Hot

Check

Oil Level in

Reservoir

Fill to

Proper

Level

Defective

Below Level

Repair

Replace

Check

System

Pressure

Reduce

System

Load

High

Inspect Charge

Relief Valve

Repair

Replace

Defective

Inspect

Charge

Pump

Repair

Replace

Defective

Inspect Motor

Repair

Replace

Defective

Inspect

Inlet

Screen or Filter

Replace

Clogged

Check

Charge

Pressure

Low

Replace

Pump & Motor

Inspect

Bypass Valve

(If used)

Repair

Replace

Defective

Contents

Main Table of Contents Introduction Page Parts - Exploded View Note: Investigating having this page fold out from page 3 so that Parts drawings are together Page Page Page Page Model Code Displacement 2.5 cid (41 cc) Displacement 3.0 cid (49 cc) Displacement 3.8 cid (62 cc) Item 28, 39 - Drive Shafts Item 43, 44, 45, 46 - Relief Valve Sub-Assembly Item 1 - Housing Identification Item 43, 44, 45, 46 Relief Valve Sub-Assembly Item 1 Housing Identification Item 48, 49 - Servo Piston Item 64, 65 Index of Mechanical Servo Controllers Control Valve Sub-Assembly Item 64, 65 Mechanical Servo (MA, MB)* Item 64, 65 High Gain (MC, MF)* Item 64, 65 Neutral Lockout (MD, ME)* Control Valve Sub-Assembly Destroke Valve Option 1 Item 64, 65 Option 1 (MA, MB, MC, MD, ME, MF)* Control Valve Sub-Assembly Destroke Valve Option 2 Item 64, 65 Option 2 (MA, MB, MC, MD, ME, MF)* Control Valve Sub-Assembly Destroke Valve Option 3 Item 64, 65 Option 3 (MA, MB, MC, MD, ME, MF)* Control Valve Sub-Assembly Detroke Valve Option 4 Item 64, 65 Option 4 (MA, MB, MC, MD, ME, MF)* Orifices Sizes Available XX Last two digits of dash number stamped on face of orice. Item 83 - Charge Pump Adapter Assembly Gerotor Sizes Available Required Tools Swash Plate Sub-Assembly Mechanical Servo Control Mechanical Servo Control Assembly Servo Piston Servo Piston/ Dual Pump Housing Note "V" notch locations Valve Plate Identification Lefthand Rotation Righthand Rotation Page Page Note "V" notch locations Valve Plate Identification Lefthand Rotation Righthand Rotation Page Page Page Recommended Gauge Locations Gauges Recommended Explanatory Diagram Symptom: Neutral Difficult or Impossible to Find Symptom: Operates in One Direction Only Symptom: System Will Not Operate in Either Direction Page Start-Up Procedure