Danfoss PAHT G Series User Manual Download

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Service guide

PAHT / PAHT G pumps

PAHT 20-32 / PAHT G 20-32Product type -

Disassembling and assembling

hpp.danfoss.com

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Summary of Contents for PAHT G 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: ...ed by the warranty Introduction Table of Contents Contents Introduction 2 1 Disassembling the pump 3 2 Inspection 9 2 1 Valve and thrust plate 9 2 2 Swash plate 9 2 3 Pistons 10 3 Assembling 11 4 Spare parts list for PAHT 20 32 20 6 Spare parts list for PAHT G 20 32 21 8 Tool sets 22 This document covers the instructions for disassembling and assembling the axial piston pumps PAHT PAHT G 20 32 ...

Page 3: ...21B1108 DKCFN PI 012 E3 02 01 2016 1 Disassembling the pump 2 Loosen and remove 6 screws 1 Tools required for dismantling the pump 3 Remove mounting flange 4 Remove shaft sealing Caution Avoid scratching the sealing surface on the shaft 5 Remove spring 6 Remove 2 guide pins ...

Page 4: ...ssembling PAHT PAHT G 20 32 4 180R9175 521B1108 DKCFN PI 012 E3 02 01 2016 7 Remove O ring 8 Turn pump upside down 11 View to pistons and retainer plate 9 Loosen and remove 10 screws 10 Remove cover 12 Remove pistons and retainer plate ...

Page 5: ...assembling and assembling PAHT PAHT G 20 32 5 180R9175 521B1108 DKCFN PI 012 E3 02 01 2016 13 Remove retainer ball 14 Remove retainer 15 Remove spring 16 Remove cylinder barrel 18 Remove 1 guide pin 17 Remove port plate ...

Page 6: ...T G 20 32 6 180R9175 521B1108 DKCFN PI 012 E3 02 01 2016 19 Turn pump upside down Loosen and remove 4 screws 20 Remove port flange 21 Remove 1 guide pin 23 Loosen thrust plate from cylinder barrel 22 Remove O ring from port flange 24 Remove thrust plate ...

Page 7: ...175 521B1108 DKCFN PI 012 E3 02 01 2016 25 Remove O rings from thrust plate 27 Remove 1 guide pin from end cover plate 26 Remove backup rings from thrust plate 28 Loosen and remove screw from swash plate 30 Remove 2 guide pins from end cover plate 29 Remove swash plate ...

Page 8: ...e guide Disassembling and assembling PAHT PAHT G 20 32 8 180R9175 521B1108 DKCFN PI 012 E3 02 01 2016 31 Remove O ring from end cover plate 32 Remove shaft sealing from mounting flange 33 34 Pump disassembled ...

Page 9: ...st show any sign of wear 1 Check that surface of swash plate is smooth and without any large scratches depth more than 0 1 mm 2 Hold a ruler against surface of plate and check tightness against a light source 2 Inspection 2 2 Swash plate 2 1 Valve and thrust plate 3 Check that both O rings and back up rings are not broken and do not show severe wear ...

Page 10: ...shes in cylinderbarrel for wear and scratches 1 Play in ball and socket joint must not exceed 0 1 mm 2 Thickness of piston shoes must be at least 4 1 mm 3 Hold a ruler against surfaces of piston shoes to check that the surfaces are even and smooth and without any scratches It is acceptable that the black treated surfaces of the pistons are partly worn 2 3 Pistons ...

Page 11: ...st be lubricated It is important to lubricate ALL parts to be assembled with clean filtered water Especially all PEEK parts WARNING Do not use silicone when assembling the pump Do not reuse disassembled O rings they might be damaged Always use new O rings Important It is essential that the pump is serviced in conditions of absolute cleanliness All parts must be absolute clean before mounting 1 Too...

Page 12: ...1108 DKCFN PI 012 E3 02 01 2016 5 Mount port flange on housing Use pin as guide 6 Mount 4 screws M8x50 7 Tighten screws to 30Nm 9 Mount 1 guide pin inside the housing on the back side of the port plate 8 Turn pump upside down 10 Mount port plate Be aware of orientation guide pin ...

Page 13: ... DKCFN PI 012 E3 02 01 2016 11 Mount backup rings on the thrust plate 13 Spray with water on cylinder barrel and thrust plate 12 Mount O rings on the thrust plate 14 Mount thrust plate on cylinder barrel 16 Mount cylinder barrel in housing 15 Press thrust plate into cylinder barrel ...

Page 14: ...5 521B1108 DKCFN PI 012 E3 02 01 2016 17 Mount spring 18 Mount retainer on top of the spring 19 Spray with water and mount retainer ball 21 Spray with water and mount pistons 20 Place retainer plate on top of retainer ball 22 Spray with water and mount O ring on end cover ...

Page 15: ...mbling PAHT PAHT G 20 32 15 180R9175 521B1108 DKCFN PI 012 E3 02 01 2016 23 Mount 2 guide pins on endcover 25 Mount screw M8x16 24 Mount swash plate 26 Tighten screw to 30Nm 28 Spray piston shoes with water 27 Mount 1 guide pin on housing ...

Page 16: ...180R9175 521B1108 DKCFN PI 012 E3 02 01 2016 29 Mount endcover on the housing 30 Mount 10 screws M8x16 31 Tighten 10 screws to 30Nm 33 Spray with water and mount O ring 32 Turn pump upside down and mount 2 guide pins 34 Spray shaft sealing with water before mounting ...

Page 17: ...HT PAHT G 20 32 17 180R9175 521B1108 DKCFN PI 012 E3 02 01 2016 35 Use tool and press shaft sealing into place 37 Mount spring 36 Mount metal ring 38 Mount special tool on shaft 40 Mount sealing smallest diameter pointing down 39 Spray with water ...

Page 18: ...Service guide Disassembling and assembling PAHT PAHT G 20 32 18 180R9175 521B1108 DKCFN PI 012 E3 02 01 2016 41 Mount mounting flange 42 Mount 6 screws 43 Tighten screws to 30Nm ...

Page 19: ...Service guide Disassembling and assembling PAHT PAHT G 20 32 19 180R9175 521B1108 DKCFN PI 012 E3 02 01 2016 Finished ...

Page 20: ... 1 Swash plate AISI 431 x x x 32 1 Screw Ø8 x 16 AISI 304 x x x 34 2 Pin Ø4 x 14 AISI 304 x x x 61 1 Cylinder barrel AISI 431 x 62 1 Spring AISI 304 x 63 1 Retainer PEEK x 64 1 Retainer ball AISI 304 x 65 1 Retainer plate 1 4301 x 66 9 Piston AISI 431 PEEK x 67 1 Key 8 x 7 x 32 AISI 316Ti x 91 1 Port plate AISI 304 PEEK x 92 1 Valve plate AISI 431 x 93 9 Back up ring PTFE x 94 9 O ring Ø13 x 2 NBR...

Page 21: ...02 x 3 NBR x 11 1 End cover CW AISI 316 31 1 Swash plate AISI 431 x x x 32 1 Screw Ø8 x 16 AISI 304 x x x 34 2 Pin Ø4 x 14 AISI 304 x x x 61 1 Cylinder barrel AISI 431 x 62 1 Spring AISI 304 x 63 1 Retainer PEEK x 64 1 Retainer ball AISI 304 x 65 1 Retainer plate 1 4301 x 66 9 Piston AISI 431 PEEK x 67 1 Key 8 x 7 x 32 AISI 316Ti x 91 1 Port plate AISI 304 PEEK x 92 1 Valve plate AISI 431 x 93 9 B...

Page 22: ...01 180R9175 521B1108 DKCFN PI 012 E3 02 22 Danfoss A S High Pressure Pumps DK 6430 Nordborg Denmark 180Z0236 Tool set PAH PAHT PAHT G 20 32 Qnt Designation 1 Shaft bush topedo x 1 Press tool 1 x 1 Press tool 2 x 8 Tool sets ...

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