Danfoss PAHT 50-90, PAHT G 50-90 Service guide
Service guide
PAHT / PAHT G pumps
PAHT 50-90 / PAHT G 50-90
Disassembling and assembling
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Service guide | Disassembling and assembling PAHT and PAHT G 50-90
Table of Contents 1. Introduction .............................................................................................................................................................. 2
2. Disassembling the pump ..................................................................................................................................... 2
3. Inspection .................................................................................................................................................................. 9
4. Assembly ..................................................................................................................................................................10
5. Spare parts list for PAHT 50-90 .........................................................................................................................18
6. Exploded view for PAHT 50-90 .........................................................................................................................19
7. Spare parts list for PAHT G 50-90 .....................................................................................................................20
8. Exploded view for PAHT G 50-90 .....................................................................................................................21
9. Tool sets ....................................................................................................................................................................22
1. Introduction
NOTE: If the pump is disassembled within the warranty period, the pump is no longer covered
by the warranty.
Tools required for dismantling the pump
2
180R9172 | 521B1092 | DKCFN.PI.012.D4.02 | 06.2017
Service guide | Disassembling and assembling PAHT and PAHT G 50-90
2. Disassembling the
pump
2. Remove mounting ange.1. Loosen and remove 4 screws.
4. Remove shaft sealing.
Caution: Avoid to scratch the sealing
3. Remove spring.
surface on the shaft.
5. Remove 2 guide pins. 6. Remove O-ring.
180R9172 | 521B1092 | DKCFN.PI.012.D4.02 | 06.2017
3
Service guide | Disassembling and assembling PAHT and PAHT G 50-90
7. Turn pump upside down. 8. Loosen and remove 10 screws.
9. Remove cover.
11. Remove retainer ball10. Remove pistons and retainer plate.
4
180R9172 | 521B1092 | DKCFN.PI.012.D4.02 | 06.2017
Service guide | Disassembling and assembling PAHT and PAHT G 50-90
13. Remove spring12. Remove retainer
14. Remove cylinder barrel. 15. Remove port plate.
17. Turn pump upside down and remove 2
washers.16. Remove 1 guide pin.
180R9172 | 521B1092 | DKCFN.PI.012.D4.02 | 06.2017
5
Service guide | Disassembling and assembling PAHT and PAHT G 50-90
18. Loosen and remove 6 screws. 19. Remove port ange.
21. Remove O-ring from port ange.20. Remove 1 guide pin.
22. Loosen thrust plate from cylinder barrel. 23. Remove thrust plate.
6
180R9172 | 521B1092 | DKCFN.PI.012.D4.02 | 06.2017
Service guide | Disassembling and assembling PAHT and PAHT G 50-90
25. Remove backup rings from thrust plate.24. Remove O-rings from thrust plate.
27. Loosen and remove screw from swash
plate.26. Remove 1 guide pin from end cover plate.
29. Remove 2 guide pins from end cover plate.28. Remove swash plate.
180R9172 | 521B1092 | DKCFN.PI.012.D4.02 | 06.2017
7
Service guide | Disassembling and assembling PAHT and PAHT G 50-90
30. Remove O-ring from end cover plate.
Pump disassembled
31. Remove shaft sealing from mounting
ange.
8
180R9172 | 521B1092 | DKCFN.PI.012.D4.02 | 06.2017
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