Danfoss PAH 10-12.5, PAHT 10-12.5, PAHT G 10-12.5 Service guide
Servie guide
PAH, PAHT, PAHT G pumps
PAH 10-12.5, PAHT 10-12.5 and
PAHT G 10-12.5
Disassembling and assembling
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Service guide | Disassembling and assembling PAH 10-12.5, PAHT 10-12.5 and PAHT G 10-12.5
Table of Contents |
1. |
Disassembling the pump.................................................................................................................... |
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2. |
Inspection ............................................................................................................................................. |
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2.1. |
Port plate and valve plate .................................................................................................................. |
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2.2. |
Pistons..................................................................................................................................................... |
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2.3. |
Cylinder barrel ...................................................................................................................................... |
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2.4. |
Housing.................................................................................................................................................. |
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2.5. |
Swash plate ........................................................................................................................................... |
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3. |
Assembling............................................................................................................................................ |
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4. |
Spare parts list for PAH 10-12.5 / PAHT 10-12.5............................................................................ |
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4.1. |
Exploded view PAH 10-12.5 / PAHT 10-12.5.................................................................................. |
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5. |
Spare parts list for PAHT G 10-12.5................................................................................................. |
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5.1. |
Exploded view PAHT G 10-12.5........................................................................................................ |
18 |
Introduction |
NOTE: If the pump is disassembled within the warranty period, the pump is no longer covered |
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by the warranty. |
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This document covers the instructions for |
Tools provided with tool set 180Z0235: |
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disassembling and assembling the axial piston |
• Shaft bush, torpedo |
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pumps PAH / PAHT / PAHT G 10-12.5. |
• Press bush ø18 (Plastic) |
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2 |
180R9095 | 521B0986 0 | DKCFN.PI.010.NA4.02| 06.2017 |
Service guide | Disassembling and assembling PAH 10-12.5, PAHT 10-12.5 and PAHT G 10-12.5
1.Disassembling the pump
1. Tools required for dismantling.
3. Dismantle the front cover using a vice.
5.Remove the two small O-rings from the flange. Remove the seal from the front cover using a screwdriver.
2.Remove the parallel key and unscrew the front cover.
4.Remove the shaft seal using two screwdrivers.
Caution: Avoid scratching the sealing surface on the shaft.
6. Unscrew the four screws for the housing.
180R9095 | 521B0986 0 | DKCFN.PI.010.NA4.02| 06.2017 |
3 |
Service guide | Disassembling and assembling PAH 10-12.5, PAHT 10-12.5 and PAHT G 10-12.5
7. Remove the housing.
9.Remove the pistons and the retainer plate from the cylinder barrel.
11. Remove the spring guide.
8. Remove the cylinder barrel.
10. Remove the retainer guide.
12. Remove the spring.
4 |
180R9095 | 521B0986 0 | DKCFN.PI.010.NA4.02| 06.2017 |
Service guide | Disassembling and assembling PAH 10-12.5, PAHT 10-12.5 and PAHT G 10-12.5
13.Loosen the valve plate using two screwdrivers. Place one of the screwdrivers in the slot of the valve plate.
15.Remove the five O-rings and the five back-up O-rings.
17.Wash all parts and replace all seals (inclusive shaft seal).
19.If the pump has failed, the reason for the failure must be found and fixed before the repaired pump is re-installed.
14. Remove the valve plate.
16. Remove the port plate from the flange.
18.Inspect all parts carefully (see “Inspection”) and replace any worn parts.
180R9095 | 521B0986 0 | DKCFN.PI.010.NA4.02| 06.2017 |
5 |
Service guide | Disassembling and assembling PAH 10-12.5, PAHT 10-12.5 and PAHT G 10-12.5
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Housing with |
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swash plate |
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and bearing |
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Retainer plate |
Flange |
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Pistons |
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Spring |
Plugs |
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Spring guide |
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Front cover |
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Retainer guide |
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Cylinder barrel |
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Front |
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cover crews |
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Shaft seal |
Valve plate with |
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Port plate |
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sealing |
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6 |
180R9095 | 521B0986 0 | DKCFN.PI.010.NA4.02| 06.2017 |
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