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General Pump KEZ Series Repair Manual

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KEZ
Repair Manual
Ref 300666 Rev. B
03-18

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Summary of Contents for General Pump KEZ Series

  • Page 1 Repair Manual Ref 300666 Rev. B 03-18...

  • Page 2: Table Of Contents

    KEZ SERIES GENERAL PUMP A member of the Interpump Group INDEX INTRODUCTION ..........Page 3 REPAIR ISTRUCTIONS .

  • Page 3: Introduction

    KEZ SERIES GENERAL PUMP A member of the Interpump Group 1. INTRODUCTION This manual describes the instructions for repairing the KEZ Pump, and must be carefully read and understood before performing any repair intervention on the pump. Correct use and adequate maintenance is fundamental for the pumps regular operation and long duration. General Pump declines any responsibility for damage caused by misuse or the non-observance of the instructions described in this manual.

  • Page 4: Crank Mechanism Disassembly

    KEZ SERIES GENERAL PUMP A member of the Interpump Group 2.1.1 Crank mechanism disassembly The correct sequence is the following: A) Dissasemble: • pump shaft key • rear cover • connecting rod cap • side covers, using 3 wholly threaded M6 x 50 screws, inserting them in the holes as shown in fig.
  • Page 5 KEZ SERIES GENERAL PUMP A member of the Interpump Group B) Before reassembly of the side covers, check the seal lips for wear. If replacement is necessary, position the new ring using the correct tool (#F27904500) as shown in fig. 5.

  • Page 6: Disassembly/Assembly Of Bearings And Shims

    KEZ SERIES GENERAL PUMP A member of the Interpump Group D) Install the connecting rod cap respecting numbering, and fasten the relevant bolts (lubricating both the head and the threaded stem) proceeding in three different steps, see fig. 7. 1. Approaching torque 4-6 ft. lbs. (6-8 Nm) 2.
  • Page 7 KEZ SERIES GENERAL PUMP A member of the Interpump Group B) Disassembly/assembly of the crankshaft with bearing replacement After disassembling the side covers as indicated in paragraph 2.1.1, remove the outer ring nut of the bearings from their covers and the inner ring nut, with the remaining part of the bearing, from the two shaft extremeties using a standard pin extractor or similar tool as indicated in figures 8 and 9.
  • Page 8 KEZ SERIES GENERAL PUMP A member of the Interpump Group fig. 10 Determine the shim pack as indicated in the table below. Measurement Shim Type # Pieces From: 0.05 to: 0.10 From: 0.11 to: 0.20 From: 0.21 to: 0.30 From: 0.31 to: 0.35 0.25...

  • Page 9: Fluid End Repair

    KEZ SERIES GENERAL PUMP A member of the Interpump Group 2.2 Fluid End Repair 2.2.1 Disassembly of the head - valve units Service operations are limited to valve inspection or replacement if needed. To extract the valve units proceed as follows: fig.

  • Page 10: Head Assembly - Valve Units

    KEZ SERIES GENERAL PUMP A member of the Interpump Group Disassemble the valve assemblies with simple tools - a couple of screw drivers (fig. 13) would work more than fine. Components valve assemblies are pressed together with a minimal load, therefore the job results extremely easy to be carried out.

  • Page 11: Disassembly Of The Head - Seals

    KEZ SERIES GENERAL PUMP A member of the Interpump Group To facilitate the insertion of the valve guide into its seat, use a tube that lays on the horizontal shoulders of the guide (fig. 16a and use a hammer acting on the entire circumference.
  • Page 12 KEZ SERIES GENERAL PUMP A member of the Interpump Group B) Remove the head from the crankcase. C) Extract the high pressure seals from the head, and the low pressure seals from their related support by using standard tools as shown in fig. 18; be careful not to damage the seals.

  • Page 13: Plunger Unit Disassembly

    KEZ SERIES GENERAL PUMP A member of the Interpump Group 2.2.4 Plunger Unit Disassembly The plunger unit does not require periodical maintenance. Service interventions are limited to visual inspections only. For plunger unit extraction, operate as follows: A) Unfasten the plunger screws as shown in fig. 20.

  • Page 14: Screw Calibration

    KEZ SERIES GENERAL PUMP A member of the Interpump Group 13. SCREW CALIBRATION Exploded View Fastening Torque Fastening Torque Description Material Position (ft. lbs.) (Nm) Cover fastening screws Stainless Steel Plunger fastening screws Connecting rod caps 12 R fastening screws...

  • Page 15: Repair Tools

    KEZ SERIES GENERAL PUMP A member of the Interpump Group 4. REPAIR TOOLS Pump repair may be facilitated by using the proper tools. See Below. For Assembly: Packing Insertion Guide, HP, Dia. 36 x 48 x 8 F27465800 F26406300 Packing Insertion Guide, LP, Dia. 36 x 42 x 15...
  • Page 16 KEZ SERIES GENERAL PUMP A member of the Interpump Group MAINTENANCE LOG HOURS & DATE OIL CHANGE GREASE PACKING REPLACEMENT PLUNGER REPLACEMENT VALVE REPLACEMENT GP Companies, Inc. 1174 Northland Drive Mendota Heights, MN 55120 Phone:651.686.2199 Fax: 800.535.1745 Ref 300666 Rev. B www.generalpump.com email: sales@gpcompanies.com...

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