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APP S 2.0-3.5
Service guide
26 pgs7.01 Mb0

Danfoss APP S 2.0-3.5, APP S 674 2.0-3.5 Service guide

Instruction
APP S / APP S 674 pumps APP S 2.0-3.5 / APP S 674 2.0-3.5 pumps Disassembling and assembling
ro-solutions.com
Instruction Disassembling and assembling APP S 2.0-3.5 / APP S 674 2.0-3.5
Table of Contents 1. Disassembling the pump .............................................................................................................................................. 3
2. Assembling the pump.................................................................................................................................................... 7
3. Disassembling and assembling of the swash plate ........................................................................................ 13
4. Disassembling and assembling of cylinder barrel and valve plate ........................................................... 14
5. Disassembling and assembling of the ushing valve ...................................................................................... 15
6. How to replace the shaft seal .................................................................................................................................... 15
7. Changing pistons ......................................................................................................................................................... 16
7.1 Disassembling .................................................................................................................................................................16
7.2 Assembling .......................................................................................................................................................................18
8. Spare parts list APP S 2.0-3.5 ...................................................................................................................................20
8.1 Explode view APP S 2.0-3.5 ........................................................................................................................................ 21
9. Spare parts list APP S 674 2.0-3.5 ........................................................................................................................... 22
9.1 Explode view APP S 674 2.0-3.5 ................................................................................................................................ 23
10. When should the pistons be replaced .................................................................................................................24
Introduction
This document covers the instructions for disassembling and assembling the axial piston pumps APP S 2.0-3.5 / APP S 674 2.0-3.5 pumps.
Important: It is essential that the pump is serviced in conditions of absolute cleanliness.
Tools needed:
• 6 mm allen key
• 8 mm allen key
• Torque wrench
• 2 screwdrivers
• 1 press bush tool (part of seal kit)
• Distance block For a better understanding of the pump, please see the exploded view in section 7.
Note: When disassembling and assembling 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.
Our CLP RO pumps have changed the name as listed below:
CLP674 050-058 RO: will now be called APP S 674 3.0-3.5 CLP 674 085-152 RO: will now be called APP S 674 5.1-9.0 CLP674 365-640 RO: will now be called APP S 674
This is ONLY a name change.
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180R9281 | 521B1275 | DKCFN.PI.013.C5.02 | 07.2019
Instruction Disassembling and assembling APP S 2.0-3.5 / APP S 674 2.0-3.5
1. Disassembling the pump
1. Disconnect the pump from the rest of the system.
2. Using a 6 mm allen key, unscrew the 3 bolts from shaft seal cover.
3. Remove shaft seal bushing. 4. Remove O-ring with a small screwdriver.
5. Remove ceramic ring from cover by carefully pushing it from the back of the sealing ring with a screwdriver.
180R9281 | 521B1275 | DKCFN.PI.013.C5.02 | 07.2019
6. Clean and then wet the shaft with clean water.
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Instruction Disassembling and assembling APP S 2.0-3.5 / APP S 674 2.0-3.5
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 scratch the shaft.
8. Carefully remove the shaft seal and distance ring.
9. Carefully remove the spring by lifting it with a screwdriver and one hand to pull the spring up.
11. Place pump on a distance block. Make sure there is enough free space for the
shaft beneath the housing. Remove all bolts.
10. Using a 8 mm allen key, unscrew all bolts on the end ange.
12. Remove end ange.
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180R9281 | 521B1275 | DKCFN.PI.013.C5.02 | 07.2019
Instruction Disassembling and assembling APP S 2.0-3.5 / APP S 674 2.0-3.5
14. Remove 2 pistons. Be careful not to scratch
13. Swash plate must be placed so that its
surface is not scratched. For further disassembling of swash plate, see page 14.
the pistons.
WARNING: Do not use any tools.
15. Remove the retainer plate with the remaining pistons. 16. Remove the retainer ball.
17. Remove the retainer guide and the spring.
180R9281 | 521B1275 | DKCFN.PI.013.C5.02 | 07.2019
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Instruction Disassembling and assembling APP S 2.0-3.5 / APP S 674 2.0-3.5
19. Pull the cylinder barrel straight 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, the main bearing/shaft bearing might be
18. Remove the guide pin.
damaged.
20. Place cylinder barrel upside down. For further disassembling of cylinder barrel and valve plate see page 14.
22. Remove the guide pin.
Note: The following operation is only necessary if O-ring on port ange has to be changed.
21. Remove the port plate in the housing by
hand.
23. Turn the pump upside down. Unscrew the 8 bolts in port ange.
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180R9281 | 521B1275 | DKCFN.PI.013.C5.02 | 07.2019
Instruction Disassembling and assembling APP S 2.0-3.5 / APP S 674 2.0-3.5
24. Remove bolts and port ange.
2. Assembling the pump WARNING:
Do not use silicone when assembling the pump. Do not reuse disassembled O-rings; they might be damaged. Always use new O-rings.
1. Lubrication:
• To prevent seizing-up, lubricate all threads with PTFE lubrication type.
• O-rings inside pump may be lubricated only with clean ltered water.
• O-rings for port ange, mounting ange and ushing valve must be lubricated.
• It is important to lubricate ALL parts to be assembled with clean ltered water (Especially all PEEK parts).
Important: It is essential that the pump is serviced in conditions of absolute cleanliness. All parts must be absolute clean before mounting.
2. Place the housing with pump label pointing downwards and insert guide pin
for positioning the port ange on housing.
180R9281 | 521B1275 | DKCFN.PI.013.C5.02 | 07.2019
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Instruction Disassembling and assembling APP S 2.0-3.5 / APP S 674 2.0-3.5
3. Mount new O-ring on port ange and lubricate with water.
5.
Carefully press the port ange downwards. Do not squeeze the O-ring. If the O-ring is damaged, the pump will leak.
4. Position port ange by aligning pin hole over guide pin.
6.
Lubricate the threads with PTFE lubrication Insert screws on the port ange. Tighten screws to a torque of 30 ± 3 Nm.
.
7.
Place a 10.5 mm guide pin in the port ange.
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180R9281 | 521B1275 | DKCFN.PI.013.C5.02 | 07.2019
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