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KT16A/18A/20A/22A
Repair Manual
KT16A, KT18A, KT20A, KT22A
General Pump is a
member of the
Interpump Group
Ref 300942 Rev.A
03-14

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Summary of Contents for Pratissoli KT16A

  • Page 1 KT16A/18A/20A/22A Repair Manual KT16A, KT18A, KT20A, KT22A General Pump is a member of the Interpump Group Ref 300942 Rev.A 03-14...
  • Page 2: Table Of Contents

    GENERAL PUMP KT16A/18A/20A/22A SERIES A member of the Interpump Group INDEX INTRODUCTION ..........Page 3 REPAIR INSTRUCTIONS .
  • Page 3: Introduction

    GENERAL PUMP KT16A/18A/20A/22A SERIES A member of the Interpump Group 1. INTRODUCTION This manual describes the instructions for repairing KT Series pumps, and must be carefully read and understood before performing any repair intervention on the pump. Proper pump operation and longevity depend on the correct use and maintenance.
  • Page 4: Disassembly Of Mechanical Parts

    GENERAL PUMP KT16A/18A/20A/22A SERIES A member of the Interpump Group 2.1.1 Disassembly of Mechanical Parts The operations described must be performed after removing the hydraulic part, ceramic pistons and splash guards from the pump (paragraphs 2.2.3, 2.2.4). Remove in the following order: •...
  • Page 5 GENERAL PUMP KT16A/18A/20A/22A SERIES A member of the Interpump Group • Remove the pump shaft • Complete the disassembly of the con-rod units by removing them from the pump casing and removing the piston guide pins • Remove the pump shaft seal rings using common tools •...
  • Page 6: Reassembly Of Mechanical Parts

    GENERAL PUMP KT16A/18A/20A/22A SERIES A member of the Interpump Group 2.1.2 Reassembly of mechanical parts After having checked that the casing is clean, proceed with assembly of the mechanical part as described below: • Assemble the upper and lower half-bearings in their seats in the con-rods and caps.
  • Page 7 GENERAL PUMP KT16A/18A/20A/22A SERIES A member of the Interpump Group • Couple the con-rod caps to their shanks, referring to the numbering (1, fig. 9). Note the correct assembly direction of the caps. Fasten the caps to their respective con-rod shanks by means of M8x1x42 screws (fig. 10) lubricating both the underhead and the threaded shank, proceeding in two stages: 1.
  • Page 8: Increase And Reduction Classes

    GENERAL PUMP KT16A/18A/20A/22A SERIES A member of the Interpump Group • Mount the rear cover complete with the O-ring, positioning the dipstick hole upward. • Insert Oil in the casing as indicated in the use and maintenance manual. 2.1.3 Reduction Classes...
  • Page 9 GENERAL PUMP KT16A/18A/20A/22A SERIES A member of the Interpump Group A) Disassembly/Reassembly of the crankshaft without bearings replacement After having removed the side covers as indicated in point 2.1.1, check the conditions of the rollers and their relative tracks. If all parts are in good condition, clean the components carefully with a degreaser and redistribute lubricant oil uniformly.
  • Page 10 GENERAL PUMP KT16A/18A/20A/22A SERIES A member of the Interpump Group Determining the shim pack: Perform the operation while the piston/con-rod guide units are assembled, the con-rod caps are disconnected and the con-rods are pushed downwards. Insert the crankshaft in the casing, checking that the PTO shank comes out from the provided side.
  • Page 11: Repairing Hydraulic Parts

    GENERAL PUMP KT16A/18A/20A/22A SERIES A member of the Interpump Group 2.2 REPAIRING HYDRAULIC PARTS 2.2.1 Dismantling the Head - Valve Units Operations are limited to inspection or replacement of valves, if necessary and, however, at the intervals indicated in the “Preventative Maintenance” table in chapter 11 of the use and maintenance manual. The valve units are assembled vertically inside the head.
  • Page 12 If the suction valve seats remain stuck on the head (for example scaling due to prolonged pump activity), operate as follows: For KT16A/18A use tools p/n F26019400, F27513700 and F27513400 (fig. 23, 24) For KT20A/22A use tools p/n F26019400, F27513500 and F27513400 (fig. 24, 24A) Note: before extracting from the seats, always unscrew the handle #F27513400 Ref 300942 Rev.A...
  • Page 13: Reassembling The Head-Valve Units

    GENERAL PUMP KT16A/18A/20A/22A SERIES A member of the Interpump Group 2.2.2 Reassembling the Head - Valve Units Pay particular attention to the conditions of the various components and replace if necessary, and at the intervals indicated in the “Preventative Maintenance” table in chapter 11 of the use and maintenance manual.
  • Page 14 GENERAL PUMP KT16A/18A/20A/22A SERIES A member of the Interpump Group Insert the suction and outlet valve units, checking that they are down to end stroke in the head. Take special care not to damage the anti-extrusion rings on the bushings (3, fig. 28). For correct postioning and adjustment of rings in their respective seats: •...
  • Page 15: Dismantling The Head-Seals

    GENERAL PUMP KT16A/18A/20A/22A SERIES A member of the Interpump Group 2.2.3 Dismantling the Head - Seals Replacement of the seals is necessary from the moment you begin to detect water leaks from the drainage holes provided on the back of the pump casing, and a the intervals in the “Preventative Maintenance” table in chapter 11 of the Use and Maintenance manual.
  • Page 16: Dismantling The Piston Unit

    A member of the Interpump Group Pay attention to the order of seal pack disasembly as indicted in fig. 31 for KT20A and KT22A, and in fig. 31/a for KT16A and KT18A, composed of: 1. Head ring 2. HP seals 3.
  • Page 17: Assembling The Head - Seals - Piston Unit

    GENERAL PUMP KT16A/18A/20A/22A SERIES A member of the Interpump Group 2.2.5 Reassembling the Head - Seals - Piston Unit To reassemble the various components, follow the reverse operations listed above as described in pint 2.2.3, taking particular care: A) Seals pack Respect the same order used during disassembly operations.
  • Page 18: Screw Calibration

    GENERAL PUMP KT16A/18A/20A/22A SERIES A member of the Interpump Group 3. SCREW CALIBRATION Screws are to be fastened exclusively using a torque wrench. Exploded View Description Position Fastening Fastening (From Owner’s Manual) Ft. Lbs. Cover Fixing Screw Oil Discharge Plug Piston Fixing Screw 14.8...
  • Page 19: Replacing The Con-Rod Foot Bushings

    GENERAL PUMP KT16A/18A/20A/22A SERIES A member of the Interpump Group 4. REPLACING THE CON-ROD FOOT BUSHING During maintenance, if it becomes necessary to replace the con-rod foot bushing, proceed as follows: When removing the worn bushing, take great care not to damage or scratch the seat on the con-rod.
  • Page 20: Repair Tools

    For Disassembling Part: Tool Part Number Valve bushing KT16A and KT18A F26019400 F26019400 Valve bushing KT20A and KT22A F27513600 F26019400 Pump suction valve KT16A and KT18A F27513700 F27513400 F26019400 Pump suction valve KT20A and KT22A F27513500 F27513400 Outlet valves F26019400...
  • Page 21: Maintenance Log

    GENERAL PUMP KT16A/18A/20A/22A SERIES A member of the Interpump Group 5. MAINTENANCE LOG HOURS & DATE OIL CHANGE GREASE PACKING REPLACEMENT PLUNGER REPLACEMENT VALVE REPLACEMENT GP Companies, Inc. 1174 Northland Drive Mendota Heights, MN 55120 Ref 300942 Rev.A Phone:651.686.2199 Fax: 800.535.1745 03-14 www.generalpump.com email: sales@gpcompanies.com...

This manual is also suitable for:

Kt18aKt20aKt22a

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