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Danfoss PAH 50 Instructions Manual
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Danfoss PAH 50 Instructions Manual

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Download this manual See also: Service Manual
Note: If the pump is dismantled during the warranty
period, the pump is no longer under warranty.
Dismantling:
1.
Tools required for dismantling the PAH 50 - 100 pump.
2. Remove parallel key and unscrew front screw M6 (10 mm key).
3. Unscrew screws in front flange.
521B1072
INSTRUCTIONS
Servicing PAH 50 - 100
4. Remove front flange.
5.
6. Remove guide pin from housing and the two guide pins from
DKCFN.PI.011.NC3.02
Remove shaft seal using two screwdrivers.
swash plate.
09-2013

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Summary of Contents for Danfoss PAH 50

  • Page 1 Dismantling: 4. Remove front flange. Tools required for dismantling the PAH 50 - 100 pump. Remove shaft seal using two screwdrivers. 2. Remove parallel key and unscrew front screw M6 (10 mm key).
  • Page 2 Remove swash plate using the 4 mm front screw. 10. Separate housing and port flange. 8. Remove cylinder barrel from housing. 11. Remove valve plate from port flange. 12. Remove guide pins and guide. Unscrew the eight screws M8 in port flange (6 mm key). 521B1072 DKCFN.PI.011.NC3.02...
  • Page 3 13. Remove pistons. 16. Remove thrust plate using two screwdrivers. 17. Remove shaft sealing from front flange. 14. Remove retaining plate. 18. The ceramic ring removed from the front flange. 15. Remove retaining ball. 19. Wash all parts and replace all seals (inclusive shaft seal). 20.
  • Page 4 Housing with bearing Cylinder barrel Retaining plate Front flange Pistons Port plate Port flange Thrust plate with sealings Retaining ball Retaining guide Screws for flanges Washer and screw Five guide pins O-rings Shaft seal Ceramic ring Swash plate (for fixing swash plate) 521B1072 DKCFN.PI.011.NC3.02...
  • Page 5 Inspection: Pistons Port plate and thrust plate Play in ball and socket joint must not exceed 0.1 mm. Neither port plate nor thrust plate must show any sign of wear. 2. Thickness of piston shoes must be at least 4.4 mm. 2.
  • Page 6 Cylinder barrel: Housing: Check outer bearing surface for large wear grooves (not critical). Check bearing (black) for large wear grooves (not critical). 2. Check that bushings are free from seizure and large scratches. Ensure that pistons can move freely in bushings. 521B1072 DKCFN.PI.011.NC3.02...
  • Page 7 Swash plate: Check that surface of swash plate is smooth and without any large scratches (depth more than 0.1 mm). 521B1072 DKCFN.PI.011.NC3.02...
  • Page 8 Assembly: Mount housing using pin as guide. Parts and tools required for assembly. 2. Check that all parts are OK. Replace all seals. Mount O-ring, guide and guide pins on port flange. 6. Place housing and port flange near table edge and mount screws from below.
  • Page 9 8. Press thrust plate into cylinder barrel using a table or the like as 11. Mount retaining plate (smallest centre diameter pointing upwards). support. 12. Mount pistons. Mount cylinder barrel in housing. 13. Mount ceramic ring on the tool. 10. Slide retaining ball (smallest diameter pointing upwards) down the shaft.
  • Page 10 15. Push tool through front flange. 18. Press swash plate against front flange and screw tools together. 19. Mount O-ring on front flange. 16. Mount shaft seal (carbon surface pointing downwards), spring, and washer (edge pointing downwards) by sliding them over the tool. Washer Spring Shaft seal...
  • Page 11 22. Mount tool over shaft. 25. Tighten screws to a torque of 30 Nm and mount parallel key on shaft. 23. Mount front flange on te housing using pin as guide. Guide pin 24. Remove tool. 25. Mount screws (eight M8) in front flange. 521B1072 DKCFN.PI.011.NC3.02...

  • Page 12: Unit Designation

    Service kit list for PAH 50 - 100 Pos. Qnt. Unit Designation Material Shaft bush, torpedo Press tool for 35 mm shaft Mounting screw Shaft seal AISI304/NBR Housing AISI304 Swash plate Stainless steel (1.4057) Pcs. AISI304 Retaining plate AISI304 Pcs.
  • Page 13 Exploded view PAH 50 -100 521B1072 DKCFN.PI.011.NC3.02...

This manual is also suitable for:

Pah 100