Danfoss PAHT Series, Service Manual

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

Page 2: ...d 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...

Page 3: ...1B1108 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 scratchi...

Page 4: ...sembling 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...

Page 5: ...ssembling 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...

Page 6: ...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 R...

Page 7: ...75 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 pla...

Page 8: ...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 disas...

Page 9: ...t 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...

Page 10: ...hes 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...

Page 11: ...t 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 disassemble...

Page 12: ...108 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...

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 barr...

Page 14: ...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...

Page 15: ...bling 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...

Page 16: ...80R9175 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 mou...

Page 17: ...T 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 smalle...

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 1 Swash plate AISI 431 x x x 32 1 Screw 8 x 16 AISI 304 x x x 34 2 Pin 4 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...

Page 21: ...102 x 3 NBR x 11 1 End cover CW AISI 316 31 1 Swash plate AISI 431 x x x 32 1 Screw 8 x 16 AISI 304 x x x 34 2 Pin 4 x 14 AISI 304 x x x 61 1 Cylinder barrel AISI 431 x 62 1 Spring AISI 304 x 63 1 Ret...

Page 22: ...1 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 Pres...