Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 1/43
OVERHAUL GA SIZE 3 ELEMENT CONTENT 1
WHEN?.......................................................................................................................2
2
NECESSARY PARTS .....................................................................................................2
3
NECESSARY TOOLS .....................................................................................................4
4
OVERHAUL ..................................................................................................................5 4.1 Dismantling................................................................................................................5 4.2 Cleaning and inspection of components .................................................................19 4.3 Reassembly.............................................................................................................21
5
PACKING ...................................................................................................................43
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 2/43
Oil -free Air division Aftermarket department
1 WHEN? ` For GA 315-500 and GA 315VSD The element overhaul is recommended every 24 000 hrs.
2 NECESSARY PARTS ` Element overhaul kit PN 2906 0769 00 The element overhaul kit is released with ECB1463.
8
5 4
3
1
6
7
2 9
Kit content: 1. O-ring (1x) 2. Stud (2x) 3. Bearing (2x) PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 3/43
4. Bearing (1x) 5. Bearing (1x) 6. Wave spring set (1x) 7. Wave spring set (1x) 8. Bushing (1x) (Used for transport only) 9. Cap screw (6x) ` Shims
Available shim thicknesses: •
PN 1616 7100 01: 0.05 mm
•
PN 1616 7100 02: 0.025 mm The shims are not included in the overhaul kit. It is recommended to have a number of shims in stock at the element overhaul area.
NOTE
` Others •
Oil stone
•
Fine sandpaper
•
Loctite 641
•
Loctite 243
•
Cleaning product PM:
replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
•
Oil
•
Bearing grease
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 4/43
3 NECESSARY TOOLS You can find a detailed description of all tools on the Aftermarket website > Technical information > “GA >90” > Service tools
NOTE
` Tools specific for element overhaul •
Overhaul stand: 2908 0141 00 + 6x Bolts and 6x Washers
•
Basic tool set for pulling operations: Hydraulic pump: xxxx xxxx xx Base plate: xxxx xxxx xx
•
Bearing puller set: Male QJ bearing part 1: xxxx xxxx xx Male QJ bearing part 2: xxxx xxxx xx Female QJ bearing part 1: xxxx xxxx xx Female QJ bearing part 2: xxxx xxxx xx Inner race male and female NU bearing part 2: xxxx xxxx xx Outer race male and female NU bearing part 2: xxxx xxxx xx
•
Measuring set: Inner ring: 9423 0033 06 Outer ring: 9423 0033 05 Measuring ring + calibration disc: 2908 0145 00 Dial gauge (Not include PN xxxx xxxx xx)
` Others •
Lifting tool: 2908 0088 82
•
Induction heater: 2908 0048 00 (50Hz) 2908 0048 01 (60Hz)
•
Lifting eye
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 5/43
2 x M16 for lifting the male and female rotor 3 x M12 for lifting the element 2 x M14 for lifting the element outlet housing •
Slide hammer puller 2990 0310 00
•
Torque wrench
4 OVERHAUL 4.1 DISMANTLING 1. Fit the element with its inlet flange to the overhaul set and the outlet side upwards. Secure with 6 bolts.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 6/43
Bearing retainers & wave springs 2. Unscrew the hold down bolts of both bearing retainers. 3. Remove the bearing retainers.
4. Take out both sets of wave springs. ` For the Male rotor:
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 7/43
` For the Female rotor:
5. Lock female rotor and remove male washer. 6. Lock male rotor and remove female washer.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 8/43
Male rotor QJ bearing- Part 1 7. Take the basic tool set for pulling operations (1) and the tool to protect the rotor shaft (2).
NOTE:
New elements (Q02 1616 7066 82): use puller set. Old elements (Q01 1616 7066 80/Q01 1616 7066 81): tool directly on bearing (see pictures).
` NEW element type (Q02 1616 7066 82): 8. Take bearing puller set “Male QJ bearing part 1”.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 9/43
9. Place the tool to protect the rotor shaft. 10. Place the shelves (3 parts) around the outer race of the male ball bearing.
11. Place the ring over the shelves and tighten everything together with the 3 bolts. 12. Place the puller and tear off tear off the upper inner ring and outer race of the ball bearing.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 10/43
` OLD element type (Q01 1616 7066 80/Q01 1616 7066 81):
•
Place the tool to protect the rotor shaft.
•
Place the puller over the outer race of the ball bearing and tear off the upper inner ring and outer ring of the ball bearing.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 11/43
Male rotor QJ bearing - Part 2: 13. Take bearing puller set ”Male QJ bearing part 2”.
14. Place the tool to protect the rotor shaft. 15. Place the shelves (3 parts) around the lower inner race of the male ball bearing.
16. Place the ring over the shelves and tighten everything together with the 3 bolts.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 12/43
17. Place the puller and tear off the lower inner ring of the ball bearing.
Female rotor QJ bearing - Part 1 18. Take bearing puller set “Female QJ bearing part 1”.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 13/43
19. Place the tool to protect the rotor shaft. 20. Place the shelves (3 parts) around the outer race of the female ball bearing.
21. Place the ring over the shelves and tighten everything together with the 3 bolts. 22. Place the puller and tear off the upper inner ring and the outer ring of the ball bearing.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 14/43
Female rotor QJ bearing - Part 2 23. Take bearing puller set “Female QJ bearing part 2”.
24. Place the tool to protect the rotor shaft. 25. Place the shelves (3 parts) around the lower inner race of the female ball bearing.
26. Place the ring over the shelves and tighten everything together with the 3 bolts.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 15/43
27. Place the puller and tear off the lower inner ring of the ball bearing.
Outlet housing & outer races NU bearings 28. Provide the outlet housing with 2 lifting eyes (Min 212 kg). Remove the bolts that keep the inlet and outlet housing together.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 16/43
29. Vertical lift and remove the outlet housing.
30. Take bearing puller set “Outer race male and female NU bearing”. 31. Remove both outer races (male and female) from the element outlet housing. 32. Mount the bearing puller set.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 17/43
33. Remove both outer races (male & female) from the element housing. The bearing will break when removing it. Inner races NU bearings 34. Take bearing puller set Inner race male and female NU bearing. 35. Place the tool to protect the rotor shaft. 36. Mount the bearing puller set.
37. Remove the male and female NU bearing inner race.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 18/43
Inner races NJ bearings ` To lift the rotors: 38. Prepare a wooden pallet to place both rotors. 39. Mount male and female bushing. 40. Fit 2 lifting eyes. 41. First lift the male rotor, take care to lift in line with the rotor axis. 42. Do the same for the female rotor.
43. Place the tool to protect the rotor shaft. 44. Take bearing puller set Inner race male and female NJ bearing. 45. Mount the bearing puller set and remove male and female NJ bearing inner race.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 19/43
Inlet housing & outer races NJ bearings 46. Take out the outer races of the male and female NJ bearing. 47. Use a slide hammer puller if necessary (2990 0310 00).
48. Remove the o-ring and both dowel pins.
4.2 CLEANING AND INSPECTION OF COMPONENTS ` Male and female rotor CAUTION:
These rotors were put together as a set. Always keep the rotor set together, never mix with other sets!!
To optimise element efficiency:
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 20/43
1. Clean the rotors 2. Inspect both rotors for scratches and other damage.
CAUTION:
IF necessary: smooth down with fine sandpaper and/or an oil stone to the original surface. Do not take away too much material!!!
CAUTION:
If the condition of the rotors is doubtful Ö REPLACE ELEMENT
` Element inlet & outlet housing 3. Clean inlet and outlet housing. 4. Inspect housing for scratches and other damage. CAUTION:
IF necessary: smooth down with fine sandpaper and/or an oil stone to the original surface.
CAUTION:
If the condition of the in or outlet housing is doubtful Ö REPLACE ELEMENT
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 21/43
4.3 REASSEMBLY Important remarks IMPORTANT REMARKS
Male and female rotor are delivered as a set ÖAlways keep the set together! All bearings are delivered and bound together as a set Ö Always keep the set together! Never directly hit on the new bearing races Ö You can use the rings of the old bearings after cleaning them
Inlet bearing male & female ` Outer race inlet bearing
1. Take one of the NJ bearings (PN: 0508 1100 87) 2. Remove the packing 3. Check the bearing for damages
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
REMARKS
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 22/43
NJ bearings are delivered and bound together as a set Ö Always keep the set together!
4. Fit the outer race on the female seat of the housing. Markings on top!
Bearing markings
5. Clean the old bearing ring, put it on top and hit it with a plastic hammer until you hear a metal sound Ö Bearing outer race in place 6. Repeat for the outer race male inlet bearing
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 23/43
` Inner race inlet bearing 7. Take the male rotor.
8. Inspect the rotor shaft for scratches or other damage. 9. Degrease the rotor shaft. 10. Degrease the bearing inner race. 11. Heat the bearing inner race up to 110°. 12. In the mean time, take a brush and put some Loctite 641 on the inner race seat of the rotor shaft.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 24/43
13. Put on heat resisting gloves and take the inner race.
14. Position the hot inner race on the inlet side of the rotor shaft. REMARKS
Mount the inner race in the right direction Ö Raised border towards rotor body. Make rotating moves with the inner race to spread the Loctite.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 25/43
15. When the inner race is not moving anymore, use the old outer ring to hit it softly with a plastic hammer. 16. Repeat for the inner race of the female inlet bearing. Mounting male & female rotor ` Male rotor 17. Grease the inlet bearings 18. Oil the housing
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 26/43
19. Let the inner race cool down. 20. Lift the male rotor at its outlet side. 21. Oil the rotor 22. Carefully lower the rotor in the element housing while pressing the rotor softly in the direction of the arrow (see picture)
23. When lowering the rotor, make sure the inner race of the bearing fits into the outer race.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 27/43
` Female rotor 24. Let the inner race cool down. 25. Lift the female rotor at its outlet side. 26. Oil the rotor. 27. Carefully lower the rotor in the element housing while pressing the rotor softly towards the male rotor.
28. When lowering the rotor, make sure the inner race of the bearing fits into the outer race
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 28/43
Element outlet housing 29. Grease the seal surface and place a new o-ring. 30. Mount both dowel pins, Use a plastic hammer.
31. Lift the outlet bearing housing 32. Shove the housing equally over the dowel pins. REMARK:
Make sure the O-ring stays in place
33. Tighten the 15 bolts. Start with a bolt next to a dowel pin and a torque of 39 Nm. Final torque for all the bolts is 186 Nm.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 29/43
Measuring clearances outlet bearing female rotor ` NU Cylindrical roller bearings
NU Cylindrical roller bearings •
Radial load
•
No axial load
Ö Movable in axial direction ` QJ Four-point contact ball bearing
QJ Four-point contact ball bearing •
Combined radial and axial load
ÖFixed in axial direction (Clearance: 0.04 mm). ÖTotal rotor clearance depends on position of fixed ball bearing.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 30/43
` Total rotor clearance
Total rotor clearance = 0.08 – 0.12 mm The rotor clearance can be corrected with shims: •
Increase shim thickness Ö Increase rotor clearance.
` Measuring female rotor clearance:
As the ball bearing on top of cylindrical bearing and the measurement is done WITHOUT cylindrical bearing: •
Inner ring cylindrical bearing replaced by inner ring.
•
Outer ring cylindrical bearing replaced by outer ring.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
REMARK:
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 31/43
Before placing the rings, make sure all the rings are clean!
34. Position inner and outer ring over the female rotor shaft.
35. Zero the gauge on a flat table
36. Place the measurement ring over the female rotor shaft and fix the ring with the female bushing.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 32/43
37. Lift the rotor. 38. Read out the gauge with the rotor in lifted position. 39. Write down this value and calculate the shim thickness as described below. ` Calculating shim thickness 1. Read out = 0
Difference between inner and outer ring = 0 Ö Calculated shim thickness = Total rotor clearance – bearing clearance = 0.10 mm – 0.04 mm = 0.06
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 33/43
2. Read out > 0
Inner ring below outer ring Ö Add shims Ö Calculated shim thickness = Total rotor clearance – ball bearing clearance + measured value = 0.10 mm – 0.04 mm + measured value = 0.06 + measured value 3. Read out < 0
Outer ring below inner ring Ö Remove shims PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 34/43
Ö Calculated shim thickness = Total rotor clearance – ball bearing clearance – measured value = 0.10 mm – 0.04 mm – measured value = 0.06 – measured value
` Create shim set
Create a set of shims as close as possible to the calculated shim thickness with the following available shim sizes: •
0.05 mm
•
0.025 mm
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 35/43
Measuring clearances outlet bearing male rotor ` Differences with female rotor
Difference with female rotor: Ball bearing on top of element housing Ö Measure between the inner ring and the housing
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 36/43
40. Repeat step 34 up to 39, but instead of using the outer ring, measure between the inner ring and the housing. Mounting outlet bearing male rotor REMARKS:
NU/QJ bearings are packed and bound together as a set (The 5 parts have 1 common set-number). Ö Always keep the set together! Ö Mount the bearing in the same way as it is packed!!
41. Take the NU/QJ outlet bearing for the male rotor (1079 5081 11) and remove the packing. 42. Check the bearing for damages.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 37/43
43. Take the inner race of the cylindrical bearing and heat it up to 110°. 44. In the mean time, take a brush and put some Loctite 641 on the inner race seat of the rotor shaft.
45. Put on heat resisting gloves and take the inner race. Position the hot inner race on the male rotor shaft. REMARK:
Mount the inner race in the right direction Ö Markings upwards. Make rotating moves with the inner race to spread the Loctite.
46. Let the inner race cool down. 47. Take the outlet race of the cylindrical bearing and degrease the outer race. 48. Put some Loctite 641 on the outside.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 38/43
49. Press the outer race of the cylinder bearing in the housing. If necessary, put the old clean bearing ring on top and use a plastic hammer. REMARK:
Mount the outer race in the right direction Ö Marked V points upwards
50. Assemble the correct shim set, as calculated before! 51. Check the thickness of the shim set and fit the shims over the rotor.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
REMARK:
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 39/43
Don’t switch the lower inner ring with the upper inner ring Ö upper ring has complete markings on top. Mount the bearing set exactly in the same way as it was packed!
52. Warm up the lower inner ring of the roller bearing (110 °C). 53. Position the lower inner ring over the male rotor shaft
54. Let the inner ring cool down 55. Mount the roller bearing REMARK:
Mount the outer race in the right direction Ö Marked V points upwards. Mount the bearing set exactly in the same way as it was packed!
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 40/43
56. Warm up the upper ring (110 °C) and mount onto the male rotor shaft
` Overview male bearing
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 41/43
Mounting outlet bearing female rotor 57. Repeat step 41 up to 56 for the female bearing ` Overview female bearing
Check female and male clearances
58. Mount male and female washer, torque (final torque 135 Nm) and fix a lifting eye. 59. Fix a gauge to the rotor. 60. Zero the gauge on the rotor housing. 61. Lift the rotor. 62. Read out the rotor clearance. REMARK:
Total rotor clearance has to be between 0.08 – 0.12 mm for each rotor!
63. Remove the washer with the lifting eyes. PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 42/43
Mounting female and male washer ` Female rotor:
64. Block the male rotor and mount the final female bushing. 65. Take 3 bolts, apply some Loctite 243 and position the bolts in the holes. Final torque: 135 Nm. ` Male rotor: 66. Repeat for the male rotor but do NOT use Loctite 243 because the final male bushing has to be removed when the element is mounted. Mounting wave springs and bearing retainers 67. Position a set of new wave springs onto each bearing set. 68. Fit the bearing retainers, position and torque the bolts. Use a torque of 36 Nm.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
Atlas Copco Airpower n.v Oil -free Air division Aftermarket department
Registration code Collection: Technical Information GA >90/GA >= 132VSD ` Overhaul Manual Page: 43/43
5 PACKING 69. Oil the element 70. Cover the shafts with greased paper. 71. Cover the element outlet with tape. 72. Remove the element from the overhaul stand. 73. Cover the element inlet with tape.
PM: replaces: Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.
2946 0789 00 01/12/2005
