Service guide
Changing shaft
APP / APP S / APP S 674 53-86
hpp.danfoss.com
Service guide | Changing shaft APP / APP S / APP S 674 53-86
Table of Contents
1. Introduction
Contents
1. Introduction ....................................................................................................................................................................... 2
2. Disassembling shaft and cylinder barrel ................................................................................................................. 3
3. Assembling shaft and cylinder barrel ....................................................................................................................... 4
4. Exploded view ................................................................................................................................................................... 7
This document covers the instructions for changing shaft on the rotor of the axial piston pumps
APP / APP S / APP S 674 53-86.
The shaft kit includes a tool adapter that must be used with the standard tool kit.
Important: Place the pump horizontally on
a pallet or other stable surface above the
ground. Ensure that the pump cannot roll.
For a better understanding of the pump, please
see the exploded view in section 4.
Tools provided with toolset 180Z0665:
• 1 x cone bushing extractor
• 1 x M8 x 140 screw
• 3 x M8 x 70 screws with nuts
• 3 x valve plate fixation
• 2 x M6 x 65
• 2 x tool washer
• 1 x M16 pin and nut
• 1 x ø30/17 x 3 washer
• 1 x shaft seal press bush tool
• 1 x bracket
• 1 x 8 mm Allen key
• 1 x 6 mm Allen key
• 1 x M8 x 40 with nut
• 2 x combination wrench 13mm
• 1 x combination wrench 24 mm
• 1 x combination wrench 30 mm
• 1 x 24 mm socket (½”)
• 1 x torque wrench (½”)
• 1 x valve plate tool
• 2 x screw drivers, 5.5 x 1mm
• 1 x NV24 flush valve tool
• 2 x M8 x 16 bolts
• 1 x valve plate mount
2 | © Danfoss | DCS (im) | 2017.11
180R9404 | 521B1471 | DKCFN.PI.013.1J.02
Service guide | Changing shaft APP / APP S / APP S 674 53-86
2. Disassembling shaft and
cylinder barrel
1. Use the Service guide 180R9376 for disassembling the pump. When the
pump has been disassembled, use this Service guide 180R9404 in order to
disassemble the shaft and the cylinder barrel.
2. Place the shaft, with cylinder barrel on a
surface, that will not damage or scratch
the bearing surfaces.
4. Alternatively use the clutch to protect the
shaft.
3. Loosen the cone connection by hitting
the shaft in radial direction with a soft
hammer. If the shaft has to be reused, take
care not to damage the shaft.
5. The shaft can now be pulled out of the
barrel.
© Danfoss | DCS (im) | 2017.11
180R9404 | 521B1471 | DKCFN.PI.013.1J.02 | 3
Service guide | Changing shaft APP / APP S / APP S 674 53-86
6. If there are residues or deposits on the
cone surface, gently remove them with
a piece of fine sandpaper. Flush with
clean water to remove any loose particles
before assembling.
3. Assembling shaft and
cylinder barrel
1. Place the cylinder barrel, on a surface,
that will not damage or scratch the
bearing surface.
3. Push the shaft through, until the cone
connection is reached.
2. Insert the shaft.
4. Mount the distance tube over the shaft.
Use no guide pins.
4 | © Danfoss | DCS (im) | 2017.11
180R9404 | 521B1471 | DKCFN.PI.013.1J.02
Service guide | Changing shaft APP / APP S / APP S 674 53-86
5. Mount the tool adapter.
7. Insert the threaded M16 pin into the
shaft. Tighten by hand till the thread is
fully engaged (15 - 20 mm).
6. Ensure the end with the small lip is
pointing away form the distance tube.
8.
Mount the press tool from the toolset.
© Danfoss | DCS (im) | 2017.11
9. Mount washer end nut.
10. Insert key at the other end.
180R9404 | 521B1471 | DKCFN.PI.013.1J.02 | 5
Service guide | Changing shaft APP / APP S / APP S 674 53-86
11. Mount the clutch.
13. Set the torque wrench to 250 Nm.
12. Use a piece of wood, to prevent the shaft
from rotating when spanning.
14. Span the nut with 250 Nm, while holding
the clutch. Preferably 2 persons is needed
to perform the task.
6 | © Danfoss | DCS (im) | 2017.11
15. Unscrew the nut, and remove clutch, tools
and distance tube.
16. To assemble the pump, use the
Service guide 180R9376.
180R9404 | 521B1471 | DKCFN.PI.013.1J.02
Service guide | Changing shaft APP / APP S / APP S 674 53-86
4. Exploded view
© Danfoss | DCS (im) | 2017.11
180R9404 | 521B1471 | DKCFN.PI.013.1J.02 | 7
Danfoss A/S
High Pressure Pumps
DK-6430 Nordborg
Denmark
© Danfoss | DCS (im) | 2017.11
180R9404 | 521B1471 | DKCFN.PI.013.1J.02 | 8
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