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APP 0.6
Instruction Manual
8 pgs1.02 Mb0

Danfoss APP 0.6, APP 1.0 Service guide

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Service guide
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APP 0.6 - 1.0 Disassembling and assembling
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Service guide | Disassembling and Assembling, APP 0.6-1.0
Table of Contents
Contents
Introduction ................................................................................................................................................................................2
1. Disassembling and assembling the pump .............................................................................................................3
2. Removal of flushing valve.............................................................................................................................................6
3. Change of shaft seal .......................................................................................................................................................7
4. Exploded view APP 0.6-1.0 ........................................................................................................................................ 10
Introduction
This document covers the instructions for disassembling and assembling the axial piston pump APP 0.6-1.0
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.
Tools needed:
• Shaft seal tool (code no. 180B4142)
• Seal set (code no. 180B4141)
• 2 Screwdrivers
WARNING: Do not reuse disassembled O-ring or shaft seal as they might be damaged.
© Danfoss | DCS (im) | 2017.082 | 180R9092 | DKCFN.PI.013.EC5.02 | 521B0739
Service guide | Disassembling and Assembling, APP 0.6-1.0
1. Disassembling and assembling the pump
1. Unscrew the 4 mounting screws and remove seal SAE flange. Do not yet unscrew the 2 lower screws.
3. Unscrew the 2 lower screws.
2. Wet the shaft and shaft seal with clean (filtered) soap water. Gently lever the shaft seal assembly free using 2 screwdrivers.
4. Carefully turn the whole pump over so that the shaft is facing down. Support the pump in a suitable hollow base so that the pump is not supported by the shaft.
5. Remove the housing.
© Danfoss | DCS (im) | 2017.08 180R9092| DKCFN.PI.013.EC5.02 | 521B0739| 3
6. Remove the pistons, retaining plate, retaining ball, spring guide, and spring from the cylinder barrel.
Service guide | Disassembling and Assembling, APP 0.6-1.0
7. Remove the cylinder barrel.
9. Gently lever the valve plate assembly free with the aid of a screwdriver.
8. Remove the port plate and guide pin.
Mount backup ring first
Then mount O-ring
10. Replace the O-rings and the back-up rings
on the valve plate. Mount the new back­ up rings on the new valve plate first and then mount the new O-rings. Wet the O-rings and back-up rings with clean (filtered) soap water.
11. Gently press, by hand, the valve onto the cylinder barrel.
Locating hole
Guide pin
12. Position the port plate over the guide pin.
IMPORTANT: Make sure that the guide
pin is located in the locating hole in the port plate
© Danfoss | DCS (im) | 2017.084 | 180R9092 | DKCFN.PI.013.EC5.02 | 521B0739
Service guide | Disassembling and Assembling, APP 0.6-1.0
O-ring
13. Replace O-ring on the port flange and position the new cylinder barrel on the port plate.
15. Position the housing on the port flange and over the guide pin.
14. Position the new spring, new spring guide, new retaining ball, new retainer and new pistons.
16. Hold the pump topgether and carefully
turn it over to rest on the housing. To prevent seizing-up, lubricate the threads on the 2 screws and screw them into the port flange and the housing. Use Molykote D paste from Dow Corning or Klüber UH1 84-201 from Klüber lubrication. Tighten the 2 flange screws accordiing to exploded view.
18. Replace the O-ring on the SAE flange.17.Mount the new shaft seal following the
instructions on page
© Danfoss | DCS (im) | 2017.08 180R9092| DKCFN.PI.013.EC5.02 | 521B0739| 5
Service guide | Disassembling and Assembling, APP 0.6-1.0
19. Lubricate the threads on the 4 screws with grease and screw them into the pump and tighten by hand. Use Molykote D paste from DOW Corning or Klüber UH1 84-201 from Klüber lubrication. Tighten screws according to exploded view.
2. Removal of flushing valve
1.. Use a pointed plier to remove flushing valve. Gently grab the pin with the plier and pull it out.
3. To assemble the valve, press new spring onto shoulders of poppet guide and poppet so it is stuck on both shoulders. Then mount the new O-ring on poppet guide.
2. Assemble the new flushing valve, or
replace parts that are worn (shoulders)
4. Turnflushing valve upside down. If it is not
properly assembled spring will fall off.
© Danfoss | DCS (im) | 2017.086 | 180R9092 | DKCFN.PI.013.EC5.02 | 521B0739
Service guide | Disassembling and Assembling, APP 0.6-1.0
5. Mount flushing valve by pressing it into the hole.
3. Change of shaft seal
6. It must be pressed down so it levels with
the surface of the port flange (same level). In order to find out if the valve is working correctly, the pump needs to be further dismantled. To work correctly a small flat edged wire is pushed against the flushing valve. You should be avle to move it a couple of mm and feel the load of the spring pressing backwards.
Recessed screws
Tools needed
Recessed screws
1. Unscrew the 4 mounting screws and remove the seal SAE flange.
Do not unscrew the 2 recessed screw at this time.
2. Wet the shaft and shaft seal with clean (filtered) soap-water. Gently lever the shaft seal assembly free with the aid of 2 screwdrivers.
© Danfoss | DCS (im) | 2017.08 180R9092| DKCFN.PI.013.EC5.02 | 521B0739| 7
Service guide | Disassembling and Assembling, APP 0.6-1.0
3. Fit the hollow bush (torpedo) to the shaft. Wet the torpedo and replacement shaft
seal with soap. Do not use silicone grease.
5. Using the plastic tool provided, large diameter first, press the seal home against the shoulder, by hand.
4. Slide the shaft seal over the torpedo with
the carbon seal face pointing upwards. Be
careful not to damage the carbon seal face on the shaft seal.
6. Remove ceramic ring from the flange.
7. Push the new ceramic ring into the flange using the plastic tool provided. Make sure the face with the rubber seal is positioned against the shoulder in the flange.
Wet the parts with clean (filtered) soap­ water before assembly.
8. Position the O-ring on the seal SAE flange.
© Danfoss | DCS (im) | 2017.088 | 180R9092 | DKCFN.PI.013.EC5.02 | 521B0739
Service guide | Disassembling and Assembling, APP 0.6-1.0
9. To prevent cold welding, lubricate threads on the 4 screws with grease and
screw them into the pump and tighten by hand. Use Molykote® D paste from Dow Corning or Klüber UH1 84-201 from Klüber lubrication. Tighten the 4 flange screws according to exploded view.
© Danfoss | DCS (im) | 2017.08 180R9092| DKCFN.PI.013.EC5.02 | 521B0739| 9
Service guide | Disassembling and Assembling, APP 0.6-1.0
4. Exploded view APP 0.6-1.0
© Danfoss | DCS (im) | 2017.0810 | 180R9092 | DKCFN.PI.013.EC5.02 | 521B0739
Service guide | Disassembling and Assembling, APP 0.6-1.0
© Danfoss | DCS (im) | 2017.08 180R9092| DKCFN.PI.013.EC5.02 | 521B0739| 11
Danf already on order pro All trademarks in this material are property of the respec
Danfoss A/S
High Pressure Pumps Nordborgvej 81 DK-6430 Nordborg Denmark
oss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products
vided that such alterations can be made without subsequential changes being necessary eady agreed.
© Danfoss | DCS (im) | 2017.08
tive companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
180R9092 | DKCFN.PI.013.EC5.02 | 521B0739| 12
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