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Service guide 

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Disassembling and Assembling, APP(W) 5.1-10.2

© Danfoss | DCS (im) | 2017.06

10 | 180R9238 | DKCFN.PI.078.F3.02 | 521B1196

12. Remove the old O-ring and fit the 

 

new O-ring on the adapter.

14.  Screw the 8 screws into the flange and 

the casing. 

To prevent cold welding, 

lubricate the threads on the 8 screws 

with grease

, screw them into the pump 

and tighten by hand. Use Molykote® D 

paste from Dow Corning or Klüber UH1 

84-201 from Klüber lubrication.

13. Place the guide pin in the casing. Position 

 

the combined flange and swash plate onto 

 

the guide pin and press it gently, by hand, 

 

into the casing. 

 

Ensure not to squeeze the O-ring.

15. Remove the ceramic ring from the seal 

 

retaining ring.

16. Wet the parts with clean filtered water.

Guide pin

Summary of Contents for APP series

Page 1: ...Service guide APP pumps APP W 5 1 10 2 Disassembling and assembling hpp danfoss com...

Page 2: ...ston pump APP W 5 1 10 2 Tools needed Toolset code no 180B4162 Seal set code no 180B4161 Screwdriver Important It is essential that the pump is serviced in conditions of absolute cleanliness To unders...

Page 3: ...eal extractor supplied provided with the tool set The extractor must fit underneath the shaft seal 7 Remove the pistons retainer plate stop bush and retainer ball from the cylinder barrel 1 Unscrew th...

Page 4: ...emove the valve plate assembly using a screwdriver 11 Mount the new O rings 13 Remove the port plate by hand 10 Mount the new back up rings on the new valve plate 9 Remove the O rings and back up ring...

Page 5: ...It may be necessary to tilt the retaining ring to allow the pistons to fit into the piston bores 4 Carefully position all the pistons into the retainer plate 3 Fit the retainer guide onto the shoulder...

Page 6: ...t seizing up lubricate the threads on the 8 screws with grease screw them into the pump and tighten by hand Use Molykote D paste from Dow Corning or Kl ber UH1 84 201 from Kl ber lubrication 10 Screw...

Page 7: ...F3 02 521B1196 7 2 Mount the spacer on the swash plate 1 Replace the O rings 3 Remove the swash plate and the spacer 3 Position the swash plate on the mounting flange using the guide pins and fix it w...

Page 8: ...etaining ring counterclockwise and remove it Tools provided according to 180B4162 3 Carefully remove the flange from the casing 4 Wet the shaft and shaft seal with clean filtered water 2 Unscrew the 8...

Page 9: ...RTANT Be careful not to damage the carbon seal face on the shaft seal 6 Ensure that no dirt has entered into the pump IMPORTANT If loose particles are observed the pump must be dismantled and thorough...

Page 10: ...bricate the threads on the 8 screws with grease screw them into the pump and tighten by hand Use Molykote D paste from Dow Corning or Kl ber UH1 84 201 from Kl ber lubrication 13 Place the guide pin i...

Page 11: ...rom Kl ber lubrication 20 Remount the retaining ring and tighten by hand 18 RemovetheoldO ringandfitthenewone on the retaining ring see also drawing on last page 21 Tighten the retaining ring to a tor...

Page 12: ...Danfoss DCS im 2017 06 180R9238 DKCFN PI 078 F3 02 521B1196 12 Danfoss A S High Pressure Pumps Nordborgvej 81 DK 6430 Nordborg Denmark 6 Exploded view for APP W 5 1 10 2...

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