Eaton X70 Istruzioni operative

X70 Plug-in motor repair manual

Table of contents

X70 PLUG-IN MOTOR REPAIR MANUAL E-MOPI-RR009-E—March 2019 www.eaton.com2

Introduction............................................................................................................. 3

Identiﬁcation ........................................................................................................... 4

Required Tools ........................................................................................................ 5

Typical Cross section of Motor.............................................................................. 6

Exploded View ........................................................................................................ 8

Disassembly ............................................................................................................ 9

Appendix A ............................................................................................................ 12

Appendix B ............................................................................................................ 14

Inspection, Repair & Part Replacement ............................................................. 16

Reassembly ........................................................................................................... 17

Assembly Torque Values...................................................................................... 20

Start-Up Procedure............................................................................................... 21

Testing.................................................................................................................... 21

3X70 PLUG-IN MOTOR REPAIR MANUAL E-MOPI-RR009-E—March 2019 www.eaton.com

Introduction

This manual provides service information for the Eaton

Model X70 Plug-In 2 Speed axial piston motor. Step by

step instructions for the complete disassembly, inspection,

and reassembly of the motor are given. The following

recommendations should be followed to insure successful

repairs.

• Remove the motor from the vehicle.

• Cleanliness is extremely important.

• Clean the port areas thoroughly before disconnecting the

hydraulic lines.

• Plug the motor ports and cover the open hydraulic lines

immediately after they’re disconnected.

• Drain the oil and clean the exterior of the motor before

making repairs.

• Wash all metal parts in clean solvent.

• Use compressed air to dry the parts. Do not wipe them

dry with paper towels or cloth.

• The compressed air should be filtered and moisture free.

• Always use new seals / gaskets when reassembling

hydraulic motors.

• For replacement parts and ordering information refer to

parts list.

• Lubricate the new rubber seals with a petroleum jelly

(Vaseline) before installation.

• Torque all bolts over gasket joints, then repeat the

torqueing sequence to make-up for gasket compression.

• Verifying the accuracy of motor repairs on an authorized

test stand is essential.

4X70 PLUG-IN MOTOR REPAIR MANUAL E-MOPI-RR009-E—March 2019 www.eaton.com

18 07 12 R MD 1 XXX

Last two digit of

year built

18 for 2018 etc. Day built

Two digits

Manufacturing plant

R= Reynosa

Manufacturing cell Specific number

of the pump

Shift number

Unit Identication

Identication numbers

Serial Number Code

3 7 4 AK XXXXX A

Frame size

3= SAE B Frame,

Plug-in Mount, Closed

Circuit

Pump/motor type

4=Variable

displacement

motor

Product group

designator

AK = Piston

product

Base number

Design code

Power/medium

type

7= Low power,

Direct control

Month built

Two digits

5X70 PLUG-IN MOTOR REPAIR MANUAL E-MOPI-RR009-E—March 2019 www.eaton.com

Required Tools

• 5/16 in. Hex Key (Allen)

• ¼ in. Hex Key (Allen)

• 3/16 in. Hex key (Allen)

• Ball peen hammer

• O-ring Pick

• Soft face hammer

• Arbor Press

• Seal Driver

• 9/16 in. Socket

• Torque Wrench

• Flat tip screw driver

• Light Petroleum jelly

• External retaining ring Pliers (Straight, tip

size = 0.030)

• External retaining ring Pliers (Flat tip)

• Motor mounting Fixture

Special tools

• Swash plate retainer

6X70 PLUG-IN MOTOR REPAIR MANUAL E-MOPI-RR009-E—March 2019 www.eaton.com

Typical Cross section of Motor (Cutaway)

7X70 PLUG-IN MOTOR REPAIR MANUAL E-MOPI-RR009-E—March 2019 www.eaton.com

Typical Cross section of Motor (Side View)

8X70 PLUG-IN MOTOR REPAIR MANUAL E-MOPI-RR009-E—March 2019 www.eaton.com

Exploded View Drawing

Part List:

Item No. Description Qty

1 Housing 1

2 Dowel pin 2

3 Swash bearing 2

4 Swash plate 1

5 Drive shaft 1

6 Internal retaining ring-shaft seal 1

7 Shaft seal adapter 1

8 Seal 1

9 O-ring, shaft seal adapter 1

10 Cylindrical roller bearing, housing 1

11 Retaining ring, external 1

12 Rotating kit S/A 1

Item No. Description Qty

13 End Cover S/A 1

14 Dowel pin 2

15 Valve plate 1

16 Gasket 1

17 Bolts, end cover (2 in long) 2

18 Bolts, end cover (2.25 in long) 2

19 Plug Assembly 1

20 Control piston 1

21 Piston Ring 1

22 Bias Spring 1

23 Connector pin 1

24 External Retaining ring 2

9X70 PLUG-IN MOTOR REPAIR MANUAL E-MOPI-RR009-E—March 2019 www.eaton.com

Disassembly

• Before attempting to disassemble, clean the motor

exterior. Dispose of leakage oil and oily cloths in an

environmentally responsible manner. All parts within the

unit must be kept clean during the overhaul process.

• Handle each part with great care, marking as necessary

to ensure proper reassembly. The close tolerance of the

parts makes this requirement very important. Clean all

parts that are removed from the unit with a commercial

solvent that is compatible with the system fluid.

Compressed air may be used in the cleaning process.

However, it must be filtered to remove water and

other contamination.

1. Position the motor into a motor mounting ﬁxture, clamping

onto the outer portion of the front ﬂange, with the rear

section up. Mark the relationship of the working ports (for

reassembly identiﬁcation). Remove the four cap screws

retaining the end cover sub assembly.

ote:N The valve plate may stick to end cover. Use caution so

valve plate does not fall off.

2. Lift end cover straight up off shaft and housing. Remove

valve plate from end cover or from rotating kit assembly,

still in housing.

3. Remove gasket from housing or end cover.

10 X70 PLUG-IN MOTOR REPAIR MANUAL E-MOPI-RR009-E—March 2019 www.eaton.com

4. Install the swash plate retainer tool and tight the cap

screw to housing. This will prevent the swash plate fall

out or moving while removing Rotating kit assembly.

Note:- Make sure that the swash plate retaining tool is

touching the forged surface & not damaging the shoe

running face.

5. To remove rotating kit assembly, tilt the motor mounting

ﬁxture 90° as shown in picture. Remove rotating kit

assembly by hand, keep that on table aside.

6. Refer to Appendix A for disassembly and Inspection of

rotating kit.

7. Rotate back the motor mounting ﬁxture to normal

position, remove swash retainer tool & remove

swashplate subassembly from housing and control piston

from swashplate, if needed.

8. Remove Dowel pins from housing.

Indice

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