Eaton 70422 Manuale del proprietario
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
2
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
3
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
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
4
Model 70422 or 70423
Parts
Drawing
Pump drawn below is typical of a righthand (CW) rotation pump.
19 28
427
35
(Cover only)
5
7
26
3-1
12
21
12
10
20
11
14 23 815 24
24 15 823 14
13
18 17
9
3-2
1
2122
6
25
2
16
Serial code and
assembly number location
3
All left (CCW) or right (CW) directions
given are viewed from the input shaft end of the pump.
5
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.
6
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
Used with 2-bolt A Flange backplate
7
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
8
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)
9
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 *4-11
Cover
non-set non-set non-set
10
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.
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