Service guide
|
Disassembling and Assembling, APP 21-43
© Danfoss | DCS (im) | 2017.06
2 | 180R9121 | 521B1018 | DKCFN.PI.013.A6.02
This document covers the instructions for disassembling and assembling the axial piston
pumps APP 21-43.
Tools provided with toolset 180B4172:
•
10 mm combination wrench
•
13 mm combination wrench
•
6 mm allen key
•
Adjustable pin wrench
•
Stop for retainer plate
•
Press bush for valve plate
•
Shaft seal extractor ø45
•
M8 allen screw (20 mm and 140 mm)
•
Press bush ø45 (Plastic)
•
M8 mm eye bolt
•
M8 mm nut
• M8 x 70 mm screw
Important: It is essential that the pump is
serviced in conditions of absolute cleanliness.
Place the pump on a pallet or other stable
surface above the ground. Ensure that the pump
cannot roll. It must be possible to place the pump
vertically with the shaft pointing downwards.
This can be done between two pallets or
between two boards on a pallet provided that
the distance is minimum 50 mm.
For a better understanding of the pump, please
see the exploded view on page 12 and 13.
WARNING:
Do not reuse disassembled O-rings or shaft
seal as they might be damaged. Always use
new O-rings.
1. Introduction
Table of Contents
Contents
1. Introduction ..............................................................................................................................................................2
2.
Disassembling the pump .....................................................................................................................................3
3.
Assembling the pump .......................................................................................................................................... 6
4.
Disassembling and assembling of the swash plate ..................................................................................10
5.
Disassembling and assembling of cylinder barrel and valve plate .....................................................11
6.
Disassembling and assembling of the flush valve ....................................................................................11
7.
Changing pistons ..................................................................................................................................................12
8.
When should the pistons be replaced ...........................................................................................................17
9.
Exploded view APP 21-26 and APP 30/1,500 ..............................................................................................18
10.
Exploded view APP 30/1,200, APP 38/1,500, APP 43/1,700 ...................................................................19
