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Service guide | Disassembling and Assembling, APP(W) 5.1-10.2

© Danfoss | DCS (im) | 2017.06

180R9238 | DKCFN.PI.078.F3.02 | 521B1196 | 6

11. Mount the seal retainer ring Tighten the 

 

ring with a torque of 60 ± 5 Nm.

 

 Turn each screw 2 rounds at a time to 

ensure the flange is mounted as straight as  

possible Tighten the screws to a torque of 

30 ±3 Nm. 

To prevent 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 Klüber UH1 84-201 from Klüber 

lubrication.

10. Screw the 8 screws into the flange and the 

 housing.

8.  Position the guide pin in the housing.

9.  Position and carefully press, by hand, the 

 

combined flange and swash plate into the 

 housing.

 

IMPORTANT: Ensure not to cut the O-ring.

2.  Turn the mounting flange upside down.

1.  Unscrew the screw in the mounting flange.

3.  Disassembling swash 

 plate

Guide pin

Summary of Contents for APP 10.2

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

Page 2: ...iston 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 understand the pump design better please see exploded view on last page WARNING Do not reuse disassembled O ring or shaft seal as they might be damaged Contents Introduction 2 1 Disassembling the pump 3 2 ...

Page 3: ...seal 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 the seal retaining ring counterclockwise and remove it 4 Wet the shaft and shaft seal with clean filtered water 3 Carefully remove the mounting flange from the housing 6 Remove the whole cylinder barre...

Page 4: ...remove 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 rings from the valve plate 12 Carefully press by hand the cylinder barrel onto the valve plate Mount backup ring first Then mount O 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 of the shaft 7 Mount the new shaft seal following the instructions in chapter 5 see page 8 11 6 Position the new white stop bush on top of the retainer guide 2 Carefully slide the cylinder barrel in...

Page 6: ...nt 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 Klüber UH1 84 201 from Klüber lubrication 10 Screw the 8 screws into the flange and the housing 8 Position the guide pin in the housing 9 Position and carefully press by hand the combined flange and swash plate into the housing IMPORTANT Ensure not t...

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 with the screw 4 The mounting flange is now ready to be mounted on the housing 4 Assembling swash plate ...

Page 8: ...retaining 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 screws in the mounting flange 5 Carefully remove the shaft seal assembly using the shaft seal extractor supplied The extractor must fit underneath the shaft seal ...

Page 9: ...ORTANT 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 thoroughly cleaned with clean filtered water 8 Fit the hollow bush torpedo onto the shaft 9 Thoroughly wet the torpedo shaft and replacement shaft seal with plenty of clean filtered water Do not use silicone...

Page 10: ...ubricate 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 reta...

Page 11: ...from Klüber 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 torque of 60 5 Nm using the tool provided 17 Push the new ceramic ring into the retaining ring using the plastic tool provided Make sure the face with the rubber seal is positioned against the shoulder ...

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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