Danfoss PAHT Series Service Manual
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Danfoss PAHT Series Service Manual

Paht 20-32, paht g 20-32 disassembling and assembling
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Service guide
PAHT / PAHT G pumps
PAHT 20-32 / PAHT G 20-32Product type -
Disassembling and assembling
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Summary of Contents for Danfoss PAHT Series

  • Page 1 Service guide PAHT / PAHT G pumps PAHT 20-32 / PAHT G 20-32Product type - Disassembling and assembling hpp.danfoss.com...

  • Page 2: Table Of Contents

    Service guide Disassembling and assembling PAHT / PAHT G 20-32 Table of Contents Contents Introduction ................2 Disassembling the pump .

  • Page 3: Disassembling The Pump

    Service guide Disassembling and assembling PAHT / PAHT G 20-32 Disassembling the pump 1. Tools required for dismantling the pump. 2. Loosen and remove 6 screws. 4. Remove shaft sealing. Caution: Avoid scratching the sealing 3. Remove mounting flange. surface on the shaft. 5.
  • Page 4 Service guide Disassembling and assembling PAHT / PAHT G 20-32 7. Remove O-ring. 8. Turn pump upside down. 9. Loosen and remove 10 screws. 10. Remove cover. 11. View to pistons and retainer plate. 12. Remove pistons and retainer plate. 180R9175 / 521B1108 / DKCFN.PI.012.E3..02 / 01.2016...

  • Page 5: Service Guide Disassembling And Assembling Paht / Paht G

    Service guide Disassembling and assembling PAHT / PAHT G 20-32 13. Remove retainer ball. 14. Remove retainer. 15. Remove spring. 16. Remove cylinder barrel. 17. Remove port plate. 18. Remove 1 guide pin. 180R9175 / 521B1108 / DKCFN.PI.012.E3.02 / 01.2016...
  • Page 6 Service guide Disassembling and assembling PAHT / PAHT G 20-32 19. Turn pump upside down. Loosen and remove 4 screws. 20. Remove port flange. 21. Remove 1 guide pin. 22. Remove O-ring from port flange. 23. Loosen thrust plate from cylinder barrel. 24.

  • Page 7: Service Guide Disassembling And Assembling Paht / Paht G

    Service guide Disassembling and assembling PAHT / PAHT G 20-32 25. Remove O-rings from thrust plate. 26. Remove backup rings from thrust plate. 27. Remove 1 guide pin from end cover 28. Loosen and remove screw from swash plate. plate. 30.
  • Page 8 Service guide Disassembling and assembling PAHT / PAHT G 20-32 32. Remove shaft sealing from mounting 31. Remove O-ring from end cover plate. flange. 34. Pump disassembled. 180R9175 / 521B1108 / DKCFN.PI.012.E3..02 / 01.2016...

  • Page 9: Inspection

    Service guide Disassembling and assembling PAHT / PAHT G 20-32 Inspection 2.1. Valve and thrust plate: 1. Neither valve plate nor thrust plate must 2. Hold a ruler against surface of plate and show any sign of wear. . check tightness against a light source.. 3.

  • Page 10: Pistons

    Service guide Disassembling and assembling PAHT / PAHT G 20-32 2.3. Pistons: 3. Hold a ruler against surfaces of piston 1. Play in ball and socket joint must not shoes to check that the surfaces are even exceed 0.1 mm. and smooth and without any scratches.

  • Page 11: Assembling

    Service guide Disassembling and assembling PAHT / PAHT G 20-32 Assembling WARNING: Important: Do not use silicone when assembling the It is essential that the pump is serviced in pump. Do not reuse disassembled O-rings; conditions of absolute cleanliness. All parts they might be damaged.
  • Page 12 Service guide Disassembling and assembling PAHT / PAHT G 20-32 5. Mount port flange on housing. Use pin as guide. 6. Mount 4 screws (M8x50). 7. Tighten screws to 30Nm. 8. Turn pump upside down. 9. Mount 1 guide pin inside the housing on 10.
  • Page 13 Service guide Disassembling and assembling PAHT / PAHT G 20-32 11. Mount backup rings on the thrust plate. 12. Mount O-rings on the thrust plate. 13. Spray with water on cylinder barrel and thrust plate. 14. Mount thrust plate on cylinder barrel. 15.
  • Page 14 Service guide Disassembling and assembling PAHT / PAHT G 20-32 17. Mount spring. 18. Mount retainer on top of the spring. 20. Place retainer plate on top of retainer 19. Spray with water and mount retainer ball. ball. 22. Spray with water and mount O-ring on 21.
  • Page 15 Service guide Disassembling and assembling PAHT / PAHT G 20-32 23. Mount 2 guide pins on endcover. 24. Mount swash plate. 25. Mount screw (M8x16). 26. Tighten screw to 30Nm. 27. Mount 1 guide pin on housing. 28. Spray piston shoes with water. 180R9175 / 521B1108 / DKCFN.PI.012.E3.02 / 01.2016...
  • Page 16 Service guide Disassembling and assembling PAHT / PAHT G 20-32 29. Mount endcover on the housing. 30. Mount 10 screws (M8x16). 32. Turn pump upside down and mount 2 31. Tighten 10 screws to 30Nm. guide pins. 34. Spray shaft sealing with water before 33.
  • Page 17 Service guide Disassembling and assembling PAHT / PAHT G 20-32 35. Use tool and press shaft sealing into place. 36. Mount metal ring. 37. Mount spring. 38. Mount special tool on shaft. 40. Mount sealing (smallest diameter 39. Spray with water. pointing down).
  • Page 18 Service guide Disassembling and assembling PAHT / PAHT G 20-32 41. Mount mounting flange. 42. Mount 6 screws. 43. Tighten screws to 30Nm. 180R9175 / 521B1108 / DKCFN.PI.012.E3..02 / 01.2016...
  • Page 19 Service guide Disassembling and assembling PAHT / PAHT G 20-32 Finished. 180R9175 / 521B1108 / DKCFN.PI.012.E3.02 / 01.2016...

  • Page 20: Spare Parts List For Paht 20-32

    Service guide Disassembling and assembling PAHT / PAHT G 20-32 Spare parts list for PAHT 20-32 Pos. Qnt. Designation Material 1 Housing AISI 316 2 Pin Ø4 x 14 AISI 304 10 Screw M8 x 16 AISI 304 1 O-ring Ø102 x 3 1 End cover CW AISI 316 1 Swash plate...

  • Page 21: Spare Parts List For Paht G 20-32

    Service guide Disassembling and assembling PAHT / PAHT G 20-32 Spare parts list for PAHT G 20-32 Pos. Qnt. Designation Material 1 Housing AISI 316 2 Pin Ø4 x 14 AISI 304 10 Screw M8 x 16 AISI 304 1 O-ring Ø102 x 3 1 End cover CW AISI 316 1 Swash plate...

  • Page 22: Tool Sets

    Tool sets Qnt. Designation 1 Shaft bush, topedo 1 Press tool 1 1 Press tool 2 Danfoss A/S High Pressure Pumps DK-6430 Nordborg Denmark © Danfoss | DCS (im) | 2016.01 180R9175 | 521B1108 | DKCFN.PI.012.E3.02 | 22...

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