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
hpp.danfoss.com
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 ...................................................................................................................3
2. Inspection ............................................................................................................................................7
2.1. Port plate and valve plate .................................................................................................................7
2.2. Pistons ....................................................................................................................................................7
2.3. Cylinder barrel ..................................................................................................................................... 8
2.4. Housing ..................................................................................................................................................8
2.5. Swash plate ..........................................................................................................................................8
3. Assembling ...........................................................................................................................................9
4. Spare parts list for PAH 10-12.5 / PAHT 10-12.5 ...........................................................................15
4.1. Exploded view PAH 10-12.5 / PAHT 10-12.5 ..................................................................................16
5. Spare parts list for PAHT G 10-12.5 .................................................................................................17
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
by the warranty.
This document covers the instructions for
disassembling and assembling the axial piston
pumps PAH / PAHT / PAHT G 10-12.5.
Tools provided with tool set 180Z0235:
• Shaft bush, torpedo
• Press bush ø18 (Plastic)
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
2. Remove the parallel key and unscrew the
front cover.1. Tools required for dismantling.
4. Remove the shaft seal using two
screw drivers.
Caution: Avoid scratching the sealing
3. Dismantle the front cover using a vice.
surface on the shaft.
5. Remove the two small O-rings from the
ange. Remove the seal from the front
cover using a screwdriver. 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. 8. Remove the cylinder barrel.
9. Remove the pistons and the retainer plate
from the cylinder barrel.
10. Remove the retainer guide.
12. Remove the spring.11. Remove the spring guide.
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.
14. Remove the valve plate.
15. Remove the ve O-rings and the ve
back-up O-rings. 16. Remove the port plate from the ange.
17. Wash all parts and replace all seals
(inclusive shaft seal).
18. Inspect all parts carefully (see
and replace any worn parts.
“Inspection”
19. If the pump has failed, the reason for the
failure must be found and xed before the
repaired pump is re-installed.
)
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
Flange
Housing with
swash plate
and bearing
Retainer plate
Pistons
Spring
Plugs
Front cover
Front
cover crews
Valve plate with
sealing
Spring guide
Retainer guide
Cylinder barrel
Shaft seal
Port plate
6
180R9095 | 521B0986 0 | DKCFN.PI.010.NA4.02| 06. 2017
Loading...