Danfoss APP(W) 5.1, APP(W) 10.2 Service guide

Service guide

APP pumps

APP(W) 5.1-10.2 Disassembling and assembling

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

Table of Contents

Contents

Introduction ................................................................................................................................................................................2

1. Disassembling the pump ..............................................................................................................................................3

2. Assembling the pump ...................................................................................................................................................5

3. Disassembling swash plate ..........................................................................................................................................6

4. Assembling swash plate ................................................................................................................................................7

5. Change of shaft seal .......................................................................................................................................................8

6. Exploded view for APP (W) 5.1-10.2 ......................................................................................................................12

Introduction

NOTE: If the pump is disassembled within the warranty period, the pump is no longer covered by the warranty.

This document covers the instructions for disassembling and assembling the axial piston pump APP(W) 5.1-10.2

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:

• Toolset (code no. 180B4162)

• Seal set (code no. 180B4161)

• Screwdriver

WARNING: Do not reuse disassembled O-ring or shaft seal as they might be damaged.

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

1. Disassembling the pump

1. Unscrew the seal-retaining ring counterclockwise and remove it.

3. Carefully remove the mounting ﬂange from the housing.

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, provided with the tool set. The extractor must ﬁt underneath the shaft seal.

6. Remove the whole cylinder barrel and carefully place it on a suitable clean surface.

7. Remove the pistons, retainer plate, stop bush and retainer ball from the cylinder barrel.

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

8. Carefully remove the valve plate assembly using a screwdriver.

Mount backup ring ﬁrst

9. Remove the O-rings and back-up rings from the valve plate.

10. Mount the new back-up rings on the new valve plate.

Then mount O-ring

11. Mount the new O-rings.

12. Carefully press, by hand, the cylinder barrel onto the valve plate.

13. Remove the port plate by hand.

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