Eaton 70523 Manuel du propriétaire

Parts and Repair

Information

Eaton®

Medium Duty Piston Pump

Model 70523 or 70553, 0 -69 cm3/r [0-4.21 in3/r] Displacement

Pressure or Pressure-Flow Compensated Piston Pumps

No. 6-617

January 1998

Model 70523

Table of Contents

Introduction.........................................................................................................2

Identification........................................................................................................3

Tools Required ....................................................................................................3

Parts Drawing......................................................................................................4

Parts List .............................................................................................................5 - 12

Item 1 - Drive Shaft ID ..................................................................................6

item 2 - Backplate Assembly .........................................................................7

Item 4 - Compensator Assembly and Parts List ............................................8 - 9

Factory Pre-set Compensator Assemblies.....................................................9

Item 3 - Housing Identification......................................................................10

Item 5 - Rotating Kit......................................................................................10

Mounting Kits................................................................................................11

Product Number............................................................................................12

Repair information...............................................................................................13 - 15

Disassembly..................................................................................................13

Inspection .....................................................................................................14

Reassembly...................................................................................................14 - 15

Start-up Procedure ..............................................................................................16

Fault - Logic Troubleshooting..............................................................................17 - 19

Introduction

This manual provides service information for the Eaton Models 70523 Pressure or Pressure - Flow

Compensated Piston Pumps. Step by step instructions for the complete disassembly, inspection, and

reassembly of the pump are given. The following recommendations should be followed to insure successful

repairs.

Remove the pump from the application.

Cleanliness is extremely important.

Clean the port areas thoroughly before disconnecting the hydraulic lines.

Plug the pump ports and cover the open hydraulic lines immediately after they're disconnected.

Drain the oil and clean the exterior of the pump 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 when reassembling hydraulic pumps.

Lubricate the new rubber seals with a petroleum jelly (Vaseline) before installation.

Torque all bolts over gasketed joints, then repeat the torquing sequence to make-up for gasket

compression.

Verifying the accuracy of pump repairs on an authorized test stand is essential.

Introduction

Model 70523

Identification Numbers - Pressure or Pressure-Flow Compensated Piston Pump

Stamped on each units mounting flange.

A - Product Number Description

70523 = Single Piston Pump

70553 = Single Piston Pump, w/ Aux. Flange

B - Rotation

L - Left Hand (CCW)

R - Right Hand (CW)

C - Sequential Numbering

Single Pump - Product Number:

7 0 5 2 3 - R A A

Serial Number Code:

B 93 01 31 JB Testers Initials

Day of Month (two digits)

Month (two digits)

Revision level of parts list.

Last two digits of year built.

( 93 for 1993 etc.)

B C

Year Manufactured

(1 for 1991 etc.)

Change Code

Serial Number Code prior to Jan., 1992:

1 B- 52-JB Testers Initials

Week of Year

Identification and Tools Required

•3/8 Inch Socket

•9/16 Inch End Wrench

•1-1/2 Inch End Wrench

•11/16 Inch End Wrench

•Rachet Wrench

•Torque Wrench (100 lb./ft.)

•3/16 Inch Hex Key (Allen)

•3/16 Inch Hex Key (Allen Socket)

•Soft Face Hammer

•Internal Retaining Pliers (Straight .070 Tip)

•External Retaining Pliers (Straight .070 Tip)

•Regular or Locking Pliers

•Seal Driver or Similar Tool

•Petroleum Jelly (Such as Vaseline)

•1/2 inch I.D. x 1-3/8 inch O.D. flat washer (2 ea.)

•5/8 inch I.D. x 1-3/4 inch O.D. flat washer (1 ea.)

•1/2 inch x 4-1/2 inch N.C. Cap screw (1 ea.)

•1/2 inch N.C. Nut

Tools Required

Model 70523

Parts

Drawing

Pump drawn below is typical of a righthand (CW) rotation pump.

All left (CCW) or right (CW) directions

given are viewed from the input shaft end of the pump.

32 33

3-1 12

(Cover only)

Serial code and

assembly number location

13 16

19 20

Model 70523

Parts List

Item Part No. Qty. Description

1♦1 Drive Shaft (Identification drawing on page #6)

2♦1 Backplate Assembly (Identification drawing on page #7)

3♦1 Housing Assembly (Identification drawing on page #10)

3-1 77010-9 1 Bearing

4♦1 Compensator Assembly (Identification drawing on page #8 & 9)

5♦1 Rotating Kit Assembly (Parts list on page #10)

6 70523-605 1 Camplate

7 70523-423 1 Control Piston

8 16026-608 1 Roll Pin

9 16028-604 2 Dowel Pin

10 70523-618 2 Cover

11 16048-329 1 Washer

+ 12 16077-34 3 Retaining Ring

+ 13 16078-22 2 Retaining Ring

14 16147-412 4 Cap Screw

15 16241-2233 1 Thrust Bearing

16 16241-C2233 2 Thrust Bearing Race

17 17091-12 1 Spring

18 70420-35 1 Pivot Button

19 70500-100 2 Inner Race

20 70500-101 2 Thrust Bearing

21 70500-600 2 Trunnion Cover

+ 22 70500-604 1 Gasket

23 70523-400 1 Spring Collar

+ 24 70523-610 1 Gasket

+ 25 16232-22 1 Shaft Seal

25 16233-22 1 Shaft Seal, Drive (fluorocarbon rubber)

+ 26 16003-408-90 1 O-ring, 2.38 mm Dia. x 9.525 mm ID. [.0937 in. Dia. x .375 in. ID.]

+ 27 16004-3 2 O-ring, 3.175 mm Dia. x 47.625 mm ID. [.125 in. Dia. x 1.875 in. ID.]

27 16004-403 2 O-ring, 3.175 mm Dia. x 47.625 mm ID. [.125 in. Dia. x 1.875 in. ID.] (fluorocarbon)

28 16246-612 1 Key, Used on 31.75 [1.25] diameter shaft

29 16032-734 4 Cap Screw

30 16032-720 2 Cap Screw

32 70400-646 1 Mount Adapter, SAE "A" to "B" flange

33 16147-610 2 Cap Screw

34 16007-14 1 O-ring, (In K2 & K3 kit)

35 70411-617 1 Coupler, for 9 tooth spline

35 70411-604 1 Coupler, for 13 tooth spline

Mounting Kits (Drawings and parts list on Page #11)

K2 70442-929 1 Gear Pump Mounting Kit

K3 70142-915 1 Cover Plate Kit, (for "A" SAE flange)

K6 990596-000 1 Cover Plate Kit, (for "B" SAE flange)

Seal Repair Kit

• 70523-900 1 Seal Repair Kit

Legend ♦Refer to specific item parts list.

+ Included in seal repair kits listed.

Model 70523

Item 1

Drive Shaft Identification

Item 1 - Drive Shaft Identification

Part Number Input Drive Output Drive

70552-200, 14 Tooth

70502-200, 14 Tooth

70502-202,

31.8 [1.25] Dia. Keyed

9 Tooth

External

13 Tooth

External

9 Tooth

External

70552-203, 14 Tooth

70552-209,

31.8 [1.25] Dia. Keyed

Used with 2-bolt A Flange backplate

Used with 2-bolt B Flange backplate

Used with 2-bolt A Flange backplate

Model 70523

Item 2 - Backplate Assembly

Item 2 - Parts List

Lefthand Righthand

Rotation Rotation

Item Part No. Part No. Qty. Description

2(a) 70523-301 70523-305 1 Opposite Side Porting, Top Mounted Compensator Backplate Assembly

2(b) ---- 70523-341 1 Opposite Side Porting, Rear Mounted Compensator Backplate Assembly

2(c) 70553-305 70553-303 1 Auxiliary 2-Bolt A Flange Series 82-2, Opposite Side Porting Backplate

2-116237-11816 1 Bearing

2-270523-614 1 Guide Pin

All left (CCW) or right (CW) directions

given are viewed from the input shaft end of the pump.

Lefthand Rotation

(CCW) Righthand Rotation

(CW)

Righthand Rotation

(

)

2(a)

Top Mounted Compensator

2(b)

Rear Mounted Compensator

2(c)

Top Mounted Compensator

w/ "A" SAE Aux. Flange

Lefthand Rotation

(

CCW

)

2-1

2-2

(Loctited)

Model 70523

Item 4 - Compensator Assembly

4-1

4-2

4-3

4-4

4-3

4-5

4-6

4-7

4-8

4-9

4-10

4-11

4-12

4-13

4-14

4-15

4-16

4-17

4-18

4-19

4-20

4-21

4-11

4-22

4-22-1

Lefthand (CCW) Pump Rotation Righthand (CW) Pump Rotation For Both Pump Rotations

Pressure-Flow Compensator Pressure Compensator

4(a)

70523-FW

4(b)

70523-FU

4(c)

70523-FT

*4-11, Cover not included with non-set compensator assy.

*4-11

Cover *4-11

Cover

non-set non-set non-set

Model 70523

Item 4 - Compensator Parts List

Item 4 - Parts List (Refer to drawings)

Item Part No. Qty. Description

4(a) 70523-FW 1 Non-Set Pressure-Flow Compensator Assembly, Lefthand Rotation

4(b) 70523-FU 1 Non-Set Pressure-Flow Compensator Assembly, Righthand Rotation

4(c) 70523-FT 1 Non-Set Pressure Compensator Assembly

4-1N/S 1 Compensator Body

4-2N/S 1 Pressure Spool

4-370523-501 2 Spring Pivot

4-417122-8 1 Spring

+4-516003-7-90 1 O-ring, 1.588 mm Dia. x 8.26 mm I.D. [.0625 in. Dia. x .375 in. I.D.]

4-670500-628 1 Pressure Rod

+4-716015-24 1 O-ring, 2.38 mm Dia. x 31.75 mm I.D. [.0937 in. Dia. x 1.25 in. I.D.]

4-870500-627 1 Adjustment Cap, Pressure

4-916138-624 1 Set Screw

4-10 16024-6 1 Nut

4-11* 70523-618* 1or2 Cover*

4-12 N/S 1 Flow Spool

4-13 70500-605 1 Spring Pivot

4-14 17046-12 1 Spring

4-15 70500-629 1 Spring Pivot

+4-16 16003-1 1 O-ring, 1.59 mm Dia. x 3.175 mm I.D. [.0625 in. Dia. x .125 in. I.D.]

4-17 70500-631 1 Pressure Rod

+4-18 16133-6 1 O-ring, 1.98 mm Dia. x 11.89 mm I.D. [.078 in. Dia. x .468 in. I.D.]

4-19 70500-630 1 Adjustment Cap, Flow

4-20 16139-516 1 Set Screw

4-21 16024-5 1 Nut

4-22 16103-104 2 Plug Assembly

+ 4-22-1 16133-4 2 O-ring, 1.83 mm Dia. x 8.92 mm I.D. [.072 in. Dia. x .351 in. I.D.]

Legend + Included in seal repair kit listed on page 5.

NSS Not Sold Separately

* Covers are not included with Non-Set Compensator

Pre-set Pressure-Flow Compensator Assemblies

Non-Set Pre-set

Assembly Assembly Pump Rotation Pressure Setting Flow Setting

70523-FU 70523-DS-01 Righthand (CW) 176±3.5 bar [2550±50 lbf/in2] 13.8±0.7 bar [200±10 lbf/in2]

70523-FU 70523-EL-01 Righthand (CW) 193±3.5 bar [2800±50 lbf/in2] 19.3±0.7 bar [280±10 lbf/in2]

70523-FU 70523-EW-01 Righthand (CW) 155±3.5 bar [2250±50 lbf/in2] 5.68±1.2 bar [82.5±17.5 lbf/in2]

70523-FU 70523-FA-01 Righthand (CW) 193±3.5 bar [2800±50 lbf/in2] 13.8±0.7 bar [200±10 lbf/in2]

70523-FU 70523-FG-01 Righthand (CW) 210±3.5 bar [3050±50 lbf/in2] 13.8±0.7 bar [200±10 lbf/in2]

70523-FU 70523-FL-01 Righthand (CW) 193±3.5 bar [2800±50 lbf/in2] 15.8±0.7 bar [230±10 lbf/in2]

70523-FW 70523-FH-02 Lefthand (CCW) 210±3.5 bar [3050±50 lbf/in2] 13.8±0.7 bar [200±10 lbf/in2]

70523-FW 70523-FM-02 Lefthand (CCW) 134±3.5 bar [1950±50 lbf/in2] 21.7±0.7 bar [315±10 lbf/in2]

Pre-set Pressure Compensator Assembly

Non-Set Pre-set

Assembly Assembly Pump Rotation Pressure Setting

70523-FT 70523-FJ-03 Both 210±3.5 bar [3050±50 lbf/in2]

Model 70523

Item 3 - Housing Identification

Item 5 - Rotating Kit Assembly

Item 5

Rotating Kit Assembly

Item Part No. Qty. Description

570502-606 1 Rotating Kit Assembly

5-1NSS 9 Piston Assembly

5-2NSS 1 Spider

5-3NSS 1 Spider Pivot

5-4NSS 1 Retainer

5-5NSS 1 Piston Block

5-6NSS 3 Pins

5-7NSS 1 Washer

5-8NSS 1 Spring

5-9NSS 1 Retaining Ring

NSS - Not Sold Separately

Item 3

Housing Identification

Item Part No. Port Machined

370500-303 B

70500-311 A

70500-332 A, B

"B" Drain Port

.875-14 SAE Straight Thd.

"A" Drain Port

.875-14 SAE Straight Thd.

Rightside (CW)

Leftside (CCW)

Top of Pump

5-1

5-2 5-3

5-5

5-4

5-6 5-7 5-8 5-9

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