Danfoss APP S 674 2.0-3.5, Disassembling And Assembling Instructions

Page 1: ...ro solutions com Instruction Disassembling and assembling APP S 674 2 0 3 5 pumps MAKING MODERN LIVING POSSIBLE...

Page 2: ...7 How to replace the shaft seal 17 8 Changing pistons 17 8 1 Disassembling 17 8 2 Assembling 19 9 Exploded view APP S 674 2 0 3 5 pumps 21 10 When should the pistons be replaced 22 This document cove...

Page 3: ...bling it must be possible to place the pump vertically with the shaft pointing downwards This can be done with a distance block with a minimum height of 50 mm 1 Introduction Tools needed 6 mm allen ke...

Page 4: ...then wet the shaft with clean water 7 Through the inlet port lever the shaft seal with a screw driver between shaft seal and spring Use one hand to pull the shaft seal up WARNING Be careful not to sc...

Page 5: ...rther disassembling of swash plate see page 14 11 Place pump on a distance block Make sure there is enough free space for the shaft beneath the housing Remove all bolts Distance block 12 Remove end fl...

Page 6: ...raight upwards in a continuous lift to ensure no damage of house bearing This can only be done if the shaft seal is removed WARNING If the cylinder barrel is dropped or lowered too fast into housing t...

Page 7: ...7 180R9281 521B1275 DKCFN PI 013 C3 02 05 2013 22 Remove the guide pin Note The following operation is only necessary if O ring on port flange has to be changed 23 Turn the pump upside down Unscrew t...

Page 8: ...with clean filtered water O rings for port flange mounting flange and flushing valve must be lubricated It is important to lubricate ALL parts to be assembled with clean filtered water Especially all...

Page 9: ...e of 30 3 Nm 8 Position port plate by using the guide pin Do not use force for this operation 9 Ensure port plate is fitted tightly against the bottom Important If valve plate is disassembled from cyl...

Page 10: ...d position the retainer ball 15 Position the retainer plate 10 Place the pump on a distance block Make sure there is enough free space for the shaft beneath the housing Lubricate inside Distance block...

Page 11: ...bricate the piston shoes Tilt retainer plate for easier placement of swash plate If the swash plate has been disassembled from end flange see page 14 for assem bling of swash plate Remember to place t...

Page 12: ...ting upwards Press seal down and at the same time turn the seal clockwise until spring stops at distance ring 24 Position the shaft seal distance ring 23 Remove old O ring and place the new one on sha...

Page 13: ...osition the shaft seal cover on shaft Be careful not to damage the ceramic ring WARNING Be careful the shaft has sharp edges 29 Hold the cover down with one hand and tighten the bolts with a torque of...

Page 14: ...crew centre bolt from swash plate 2 Remove swash plate guide pin and O ring 3 Place guide pin and carefully align swash plate over guide pins 4 Lubricate centre bolt thread with a PTFE lubricant type...

Page 15: ...ng of cylinder barrel and valve plate 3 Mount the new back up rings on the valve plate Then mount the O rings Backup ring O ring 4 Lubricate the new O rings back up rings and the liners in the cylinde...

Page 16: ...valve parts 2 Carefully push the flushing valve up through the outlet connection using a small screwdriver 5 Press a new spring onto shoulders of the poppet guide and the poppet The spring must be fa...

Page 17: ...he two screws as shown in the picture below Note There is still water inside the pump 3 Unscrew the remaining screws 8 1 Disassembling 4 Remove the flange Remove pin or ensure it stays in place Ensure...

Page 18: ...05 2013 9 Inspect the piston liners 8 Remove guide and spring 10 Replace any worn parts 7 Remove retainer plate and ball WARNING Ensure that the piston shoes and the piston surfaces are not damaged du...

Page 19: ...liner and the end of cylinder barrel are wetted 2 Place the spring 3 Place the guide 4 Place the ball on the retainer plate WARNING Ensure right assembling and placement of the retainer plate See ite...

Page 20: ...02 05 2013 7 Replace the O ring and mount the flange Ensure the guide pin is mounted 8 Mount two screws as shown below and tighten them 9 Mount the remaining bolts and cross tighten them to a torque o...

Page 21: ...Instruction Disassembling and assembling APP S 674 2 0 3 5 21 180R9281 521B1275 DKCFN PI 013 C3 02 05 2013 9 Exploded view APP S 674 2 0 3 5 pumps...

Page 22: ...ved Danfoss A S High Pressure Pumps DK 6430 Nordborg Denmark 10 When should the pistons be replaced This section provides guidance on how to determine whether the parts of the pump are worn and should...