Eaton 70122 Manual Download Page 18 | Manualshive

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18

Model 70122

Fault - Logic
Troubleshooting

Check

Hyd. Fluid

Specs

OK

OK

OK

1

2

3

Check

Oil Level in

Reservoir

Improper

Install

Proper

Fluid

Replace

Pump

Inspect

Inlet Screen

or Strainer

Clogged

Clean

or

Replace

Below Level

Fill to

Proper

Level

4

Inspect

Compensator

Signal

Low

Inspect

Signal

Line

Defective

Repair

or

Replace

5

Inspect

Pump

Compensator

Defective

Repair

or

Replace

OK

OK

Symptom:

System will not Develop Proper Pressure or Flow

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Summary of Contents for 70122

Page 1: ...Eaton Medium Duty Piston Pump Model 70122 0 19 cm3 r 0 1 16 in3 r Displacement Pressure or Pressure Flow Compensated Piston Pumps Parts and Repair Information January 1998 ...

Page 2: ...ations 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 solve...

Page 3: ...vision level of parts list Last two digits of year built 93 for 1993 etc B C Serial Number Code prior to Jan 1992 1 B 52 JB Testers Initials Week of Year Identification and Tools Required 1 2 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...

Page 4: ...hand rotation pump 1 32 3 3 1 10 16 16 15 10 13 17 12 25 19 26 20 11 11 20 26 19 25 18 22 23 9 6 5 21 7 2 24 27 28 4 14 Serial code and assembly number location 8 Cover only 3 2 All left CCW or right CW directions given are viewed from the input shaft end of the pump ...

Page 5: ...aining Ring 12 16077 26 1 Retaining Ring 13 16048 312 1 Washer 14 16148 412 4 Cap Screws 15 16241 1625 1 Thrust Bearing 16 16241 C1625 2 Bearing Race 17 16253 16 1 Shaft Seal 17 16253 216 1 Shaft Seal Drive fluorocarbon rubber 18 17073 6 1 Spring 19 70101 150 2 Inner Race 20 70111 622 2 Trunnion Cover 21 70111 701 1 Gasket 22 70120 600 1 Spring Collar 23 70120 601 1 Button 24 70422 600 1 Gasket 25...

Page 6: ...2 70122 203 22 2 875 Dia keyed 70102 200 13 Tooth 70122 200 19 05 75 Dia keyed 70102 201 13 Tooth w Retaining Ring Groove Item 1 Drive Shaft Identification Item 1 Drive Shaft Identification Part Number Input Drive ...

Page 7: ...70120 311 70120 309 1 Rear Porting Backplate Assembly 2 b 70120 314 70120 318 1 Opposite Side Porting Backplate Assembly 2 1 70420 43 1 Bearing 2 2 16103 103 2 Plug Assembly 2 2 1 16133 3 2 O ring 1 59 mm Dia x 7 54 mm I D 0625 in Dia x 2969 in I D 2 3 70120 400 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...

Page 8: ...tion 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 Item 4 Compensator Assembly All left CCW or right CW directions given are viewed from the input shaft end of the pump ...

Page 9: ... 2 38 mm Dia x 22 23 mm I D 0937 in Dia x 875 in I D 4 8 70422 606 1 Adjustment Cap Pressure 4 9 70422 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 1...

Page 10: ...hthand CW 169 3 5 bar 2450 50 lbf in2 19 0 1 8 bar 275 25 lbf in2 70422 HY 70422 ET 01 Righthand CW 176 3 5 bar 2550 50 lbf in2 13 8 0 7 bar 200 10 lbf in2 70422 HY 70422 EZ 01 Righthand CW 176 3 5 bar 2550 50 lbf in2 17 2 0 7 bar 250 10 lbf in2 70422 HY 70422 FB 01 Righthand CW 191 2 1 bar 2770 30 lbf in2 15 2 0 7 bar 220 10 lbf in2 70422 HY 70422 FL 01 Righthand CW 193 3 5 bar 2800 50 lbf in2 20...

Page 11: ...art No Qty Description 5 70111 695 1 Rotating Kit Assembly 5 1 NSS 9 Piston Assembly 5 2 NSS 1 Spider 5 3 NSS 1 Spider Pivot 5 4 NSS 1 Retainer 5 5 NSS 1 Piston Block 5 6 NSS 3 Pins 5 7 NSS 2 Washer 5 8 NSS 1 Spring 5 9 NSS 1 Retaining Ring NSS Not Sold Separately Item 5 Rotating Kit Assembly ...

Page 12: ... 314 70102 301 70422 AY 03 70122 LAY 70102 200 70120 314 70102 301 70422 CA 04 70122 LAZ 70122 203 70120 314 70102 301 70422 AY 03 70122 LBA 70122 203 70120 314 70120 314 70422 CA 04 Model 70122 Righthand Rotation CW Description of Part Number Product Drive Shaft Backplate Assy Housing Assy Compensator Assy Number Item 1 Item 2 Item 3 Item 4 70122 RAG 70102 201 70120 311 70120 314 70422 BM 01 7012...

Page 13: ...g is to be removed from the piston block The spring 5 8 is highly compressed and the snap ring 5 9 should not be removed without compressing the spring The following parts will be needed to disassemble the piston block 2 ea 5 16 l D x 15 16 O D flat washer 1 ea 5 16 x 2 7 8 N C cap screw and 1 ea 5 16 N C nut Place one of the flat washers over the 5 16 x 2 7 8 cap screw and place this through the ...

Page 14: ...amine the bore for scoring or contamination 4 Examine the O D of the piston 5 1 for finish condition They should not show wear or deep scratches The shoes should be a snug fit on the ball end of the piston The flat surface of the shoes should be flat and smooth Do not lap piston shoes 5 Examine the spider 5 2 It should be flat no cracks and no signs of wear in the pivot area 6 Examine the pivot 5 ...

Page 15: ... the camplate Be sure all the parts are in their proper position 10 Clamp this assembly in a protected jaw vise with the open end of the housing 3 up 11 Install new gasket 21 12 Install control piston 7 and plug 2 2 with new o ring onto backplate Note roll pin 3 2 locations 13 Install backplate 2 and retain with cap screws 27 Torque to 23 to 27 N m 17 to 20 lb ft 14 Place new o ring 4 19 1 on plug...

Page 16: ...ows oil to flow through the sensor line thus removing any air in the sensor line Reconnect the sensor line after a steady flow of oil is coming from the line 5 Replace the coil wire or return the fuel flow to the injectors and start the engine Run at low idle speed for one minute The pump should immediately pick up oil and go into low pressure standby If there is no indication of fill in 30 second...

Page 17: ...agrams Where applicable the comment number of the statement appears in the action block of the diagrams Recommended Gauge Locations Test Port Inlet Vacuum LH Rotation System Pressure RH Rotation Load Sensing Port Tee in Line to Check Load Sensing Pressure Test Port System Pressure LH Rotation Inlet Vacuum RH Rotation Drain Port Tee in Line to Check Case Pressure Gauges Recommended Inlet vacuum gau...

Page 18: ...nstall Proper Fluid Replace Pump Inspect Inlet Screen or Strainer Clogged Clean or Replace Below Level Fill to Proper Level 4 Inspect Compensator Signal Low Inspect Signal Line Defective Repair or Replace 5 Inspect Pump Compensator Defective Repair or Replace OK OK Symptom System will not Develop Proper Pressure or Flow ...

Page 19: ...per type fluid 3 Inspect Inlet Screen or Strainer for A Suction screen or strainer plugged B Suction line to small or too long C Suction line collapsed or plugged 4 Inspect Compensator Signal for A Improper size or length of signal line B Damaged or obstructed signal line 5 Inspect Pump Compensator for A Misadjusted pressure or flow setting B Pressure or flow spool stuck open C Pressure or flow sp...

Page 20: ...20 Model 70122 Each order must include the following information 1 Product and or Part Number 2 Serial Number Code 3 Part Name 4 Quantity ...

Page 21: ...irie MN 55344 USA Tel 952 937 9800 Fax 952 294 7722 www eaton com hydraulics Eaton Fluid Power Group Hydraulics Business Europe Route de la Longeraie 7 1110 Morges Switzerland Tel 41 0 21 811 4600 Fax 41 0 21 811 4601 Eaton Fluid Power Group Hydraulics Business Asia Pacific 11th Floor Hong Kong New World Tower 300 Huaihai Zhong Road Shanghai 200021 China Tel 86 21 6387 9988 Fax 86 21 6335 3912 ...

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