Eaton 70422 Manuel du propriétaire

Eaton®

Medium Duty Piston Pump

Model 70422 or 70452

0 - 38 cm3/r [0 - 2.32 in3/r]

Displacement

Parts and Repair

Information

No. 6-631

January 1998

Model 70423 or 70453

0 - 45 cm3/r [0 - 2.77 in3/r]

Displacement

Pressure or Pressure-Flow Compensated Piston Pumps

Model 70422 or 70423

Table of Contents

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

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

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

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

Parts List .............................................................................................................5 - 15

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

item 2 - Backplate Assembly .........................................................................7 - 8

Item 4 - Compensator Assembly and Parts List ............................................9 - 10

Factory Pre-set Compensator Assemblies.....................................................11

Item 3 - Housing Identification......................................................................12

Item 5 - Rotating Kit......................................................................................12

Mounting Kits................................................................................................13

Product Number............................................................................................14 - 15

Repair information...............................................................................................16 - 18

Disassembly..................................................................................................16

Inspection .....................................................................................................17

Reassembly...................................................................................................17 - 18

Start-up Procedure ..............................................................................................19

Fault - Logic Troubleshooting..............................................................................20 - 23

Introduction

This manual provides service information for the Eaton Models 70422 or 70423 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 70422 or 70423

Identification and Tools Required

•9/16 Inch Socket

•1-1/8 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)

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

•3/8 inch x 3-1/4 inch N.C. Cap screw (1 ea.)

•3/8 inch N.C. Nut

Tools Required

Identification Numbers - Pressure or Pressure-Flow Compensated Piston Pump

Stamped on each units mounting flange.

A - Product Number Description

70422 = Single Piston Pump

70452 = Single Piston Pump, w/ Aux. Flange

70423 = Single Piston Pump

70453 = 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 4 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

Model 70422 or 70423

Parts

Drawing

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

19 28

427

(Cover only)

3-1

14 23 815 24

24 15 823 14

18 17

3-2

2122

Serial code and

assembly number location

All left (CCW) or right (CW) directions

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

Model 70422 or 70423

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 & 8)

3♦1 Housing Assembly (Identification drawing on page #12)

3-1 16238-11816 1 Bearing

3-2 16026-808 2 Roll Pin

4♦1 Compensator Assembly (Identification drawing on page #9, 10, & 11)

5♦1 Rotating Kit Assembly (Parts list on page #12)

6 70423-605 1 Camplate, 0 - 38 cm3/r [0 - 2.32 in3/r] Displacement

6 70423-610 1 Camplate, 0 - 45 cm3/r [0 - 2.77 in3/r] Displacement

7 70421-401 1 Control Piston, 0 - 38 cm3/r [0 - 2.32 in3/r] Displacement

7 70423-418 1 Control Piston, 0 - 45 cm3/r [0 - 2.77 in3/r] Displacement

+ 8 16015-27 2 O-ring, 2.38 mm Dia. x 36.51 mm ID. [.0937 in. Dia. x 1.4375 in. ID.]

9 16026-608 1 Roll Pin

10 16048-319 1 Washer

+ 11 16077-32 1 Retaining Ring

+ 12 16078-18 2 Retaining Ring

13 17091-14 1 Spring

14 70412-151 2 Thrust Bearing

15 70412-607 2 Trunnion Cover

+ 16 70412-626 1 Gasket

17 70420-35 1 Pivot Button

18 70420-59 1 Spring Collar

+ 19 70422-600 1 Gasket

+ 20 16253-18 1 Shaft Seal

20 16253-218 1 Shaft Seal, Drive (fluorocarbon rubber)

21 74308-100 2 Thrust Bearing Race

22 74308-101 1 Thrust Bearing

23 70402-100 2 Inner Race

+ 24 16077-26 2 Retaining Ring

+ 25 16003-405-90 1 O-ring, 1.59 mm Dia. x 6.35 mm ID. [.0625 in. Dia. x .25 in. ID.]

26 16246-516 1 Key, Used on 19.05 [.75] diameter shaft

26 24500-619 1 Key, Used on 22.2 [.875] diameter shaft

27 16148-412 4 Cap Screw

28 16032-612 4 Cap Screw

32 170142-600 1 Cover Plate (In K3 kit)

33 16032-610 2 Cap Screw, Cover Plate (In K3 kit)

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

35 70422-618 2 Cover

Mounting Kits (Drawings and parts list on Page #13)

K2 70442-929 1 Gear Pump Mounting Kit (for "A" SAE flange)

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

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

K7 70453-901 1 Gear Pump Mounting Kit, (for "B" SAE flange)

Seal Repair Kit

• 70422-915 1 Seal Repair Kit

Legend ♦Refer to specific item parts list.

+ Included in seal repair kits listed.

Model 70422 or 70423

Item 1

Drive Shaft Identification

Item 1 - Drive Shaft Identification

Part Number Input Drive Output Drive

70442-235,

25.4 [1.0] Dia. Keyed

70402-201, 13 Tooth

70402-207, 15 Tooth

70402-204,

22.2 [.875] Dia. Keyed

9 Tooth

Internal

41 Tooth

External

9 Tooth

Internal

70452-200, 13 Tooth

70442-228, 15 Tooth

70442-225, 13 Tooth

70442-246, 15 Tooth

70442-231,

22.2 [.875] Dia. Keyed

9 Tooth

Internal

70402-206, 13 Tooth

w/ Retaining Ring Groove

Used with 2-bolt A Flange backplate

Used with 2-bolt B Flange backplate

Used with 2-bolt A Flange backplate

Model 70422 or 70423

Item 2 - Model 70422 Backplate Assembly

(0 - 38 cm3/r [0 - 2.32 in3/r] Displacement)

Item 2 - Model 70422 Parts List (0 - 38 cm3/r [0 - 2.32 in3/r] Displacement)

Lefthand Righthand

Rotation Rotation

Item Part No. Part No. Qty. Description

2(a) 70421-318 70421-343 1 Rear Porting Backplate Assembly

2(b) 70421-327 70421-334 1 Opposite Side Porting Backplate Assembly

2(c) 70452-302 70452-304 1 Auxiliary 2-Bolt A Flange Series 82-2, Opposite Side Porting Backplate

2(d) --- 70452-317 1 Auxiliary 2-Bolt B Flange Series 101-2, Opposite Side Porting Backplate

2-170421-150 1 Bearing

2-216103-103 2 Plug Assembly

+ 2-2-116133-3 2 O-ring, 1.59 mm Dia. x 7.54 mm I.D.

[.0625 in. Dia. x .2969 in. I.D.]

2-370422-428 1 Guide Pin

Legend + Included in seal repair kit listed on page 7.

All left (CCW) or right (CW) directions

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

2-1

Lefthand Rotation

(CCW)

2-2

2-2-1

Righthand Rotation

(CW)

2-3

(Loctited)

Lefthand Rotation

(CCW) Righthand Rotation

(CW)

2(a

)

Rear Porting

2(b)

Opposite Side Porting

2-2

2-2-1

Lefthand Rotation

(CCW) Righthand Rotation

(CW)

2(c)

Opposite Side Porting with 2-Bolt A Flange

Lefthand Rotation

(CCW) Righthand Rotation

(CW)

2(d)

Opposite Side Porting with 2-Bolt B Flange

Model 70422 or 70423

Item 2 - Model 70423 Backplate Assembly

(0 - 45 cm3/r [0 - 2.77 in3/r] Displacement)

Item 2 - Model 70423 Parts List (0 - 45 cm3/r [0 - 2.77 in3/r] Displacement)

Lefthand Righthand

Rotation Rotation

Item Part No. Part No. Qty. Description

2(a) 70423-303 70423-301 1 Rear Porting Backplate Assembly

2(b) 70423-306 70423-312 1 Opposite Side Porting Backplate Assembly

2(c) 70453-301 70453-303 1 Auxiliary 2-Bolt A Flange Series 82-2, Opposite Side Porting Backplate

2(d) --- 70453-307 1 Auxiliary 2-Bolt B Flange Series 101-2, Opposite Side Porting Backplate

2-170421-150 1 Bearing

2-216103-103 2 Plug Assembly

+ 2-2-116133-3 2 O-ring, 1.59 mm Dia. x 7.54 mm I.D.

[.0625 in. Dia. x .2969 in. I.D.]

2-370422-428 1 Guide Pin

Legend + Included in seal repair kit listed on page 5. All left (CCW) or right (CW) directions

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

2-1

Lefthand Rotation

(CCW)

2-2

2-2-1

Righthand Rotation

(CW)

2-3

(Loctited)

Lefthand Rotation

(CCW) Righthand Rotation

(CW)

2(a

)

Rear Porting

2(b)

Opposite Side Porting

2-2

2-2-1

Lefthand Rotation

(CCW) Righthand Rotation

(CW)

2(c)

Opposite Side Porting with 2-Bolt A Flange

2(d)

Opposite Side Porting with 2-Bolt B Flange

Lefthand Rotation

(CCW) Righthand Rotation

(CW)

Model 70422 or 70423

Item 4 - Compensator Assembly

4-1

4-2 4-3 4-4

4-6

4-5

4-7 4-8

4-94-104-11

4-94-10

4-11

4-12 4-13

4-14

4-15

4-16

4-174-18

4-19-1

4-19

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

(Righthand (CW) rotation shown)

Pressure-Flow Compensator Pressure Compensator

4(a)

70422-HU

4(b)

70422-HY

4(c)

70422-HR

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

*4-11

Cover *4-11

Cover

non-set non-set non-set

Model 70422 or 70423

Item 4 - Compensator Parts List

Item 4 - Parts List (Refer to drawings)

Item Part No. Qty. Description

4(a) 70422-HU 1 Non-Set Pressure-Flow Compensator Assembly, Lefthand Rotation

4(b) 70422-HY 1 Non-Set Pressure-Flow Compensator Assembly, Righthand Rotation

4(c) 70422-HR 1 Non-Set Pressure Compensator Assembly

4-1N/S 1 Compensator Body

4-2N/S 1 Pressure Spool

4-370422-405 1 Spring Pivot Cap

4-417063-11 1 Spring

+4-516003-11 1 O-ring, 2.38 mm Dia. x 14.29 mm I.D. [.0937 in. Dia. x .5625 in. I.D.]

4-670421-453 1 Pressure Spring Follower

+4-716015-18 1 O-ring, 2.38 mm Dia. x 22.23 mm I.D. [.0937 in. Dia. x .875 in. I.D.]

4-870422-606 1 Adjustment Cap, Pressure

4-970422-620 1or2 Set Screw

4-10 16024-4 1or2 Nut

4-11* 70422-618* 1or2 Cover*

4-12 N/S 1 Flow Spool

4-13 70411-411 1 Spring Pivot Cap

4-14 17029-5 1 Spring

+4-15 16003-4-90 1 O-ring, 1.59 mm Dia. x 5.55 mm I.D. [.0625 in. Dia. x .2187 in. I.D.]

4-16 70421-477 1 Flow Spring Follower

+4-17 16133-6 1 O-ring, 1.98 mm Dia. x 11.89 mm I.D. [.078 in. Dia. x .468 in. I.D.]

4-18 70422-602 1 Adjustment Cap Flow

4-19 16103-103 2 Plug Assembly

+ 4-19-1 16133-3 2 O-ring, 1.59 mm Dia. x 7.54 mm I.D. [.0625 in. Dia. x .2969 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

Factory Pre-set Compensator Assemblies listed on page #11.

Ce manuel convient aux modèles suivants

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