Alpha Tool.Com.HK Limited Polisher VSP120 User Manual

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Periodic maintenance is done to check the tool and to minimize down time. These 
checks are done based on hours of operation and operating conditions.  Operating 
condition can vary depending on the work surface and job being preformed.  If the 
tool is not used for a long period of time the carbon brushes should be checked and 
the commutator cleaned, before putting the tool back into operation.
BEAriNGS AND GEArS
To minimize your tool’s down time and expensive tool repairs, it is recommended 
to...

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rEAr COVEr rEMOVAL
1.     Gently  pull  water  tube  away  from 
holder.
2.    Release the tube from the holder.
3.  Unwrap  3  inches  of  the  coiled 
harness.
4.    Remove the 2 screws from the valve 
bracket.
Figure-24
Figure-25 Figure-26
Figure-27  

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5. Pull the valve assembly away from 
mount.
6.    Remove the rear case screw.
7.  Hold  polisher  with  one  hand  and 
pull the rear case straight back with 
the other hand.
NOTE: Do not twist case in a side to side 
motion when pulling back.
8.       Pull  back  the  rear  case  until  the   
carbon brush assembly is exposed.
NOTE: Do not pull rear case further back 
from this point.
Figure-28
Figure-29
Figure-30
Figure-31  

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Carbon Brush
Carbon BrushHolder
Carbon Brush Wire
Spring
Figure-32
Figure-33
Figure-34 Figure-35
9. 
  Lift  the  spring  from  the 
carbon  brush  and  lace  on 
the side of the brush holder.
10.    Remove  the  carbon  brush 
wire spade connector from 
the  terminal  post  and  then 
remove the carbon brush.
Spade Connector  

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11.   
You  can  also  remove  the  carbon  brush  by 
removing  the  screw  and  pulling  the  holder 
out with a pair of needle nose pliers.
12.     With  the  carbon  brush  holder  removed, 
you  can  check  and  clean  the  armature 
commutator. The commutator is the contact 
points that the carbon brushes ride on when 
the motor is running.
NOTE: Each polisher has 2 carbon brushes located on opposite sides of 
each other. After the replacement of the two brushes, assemble the polisher 
by...

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16. The commutator should be clean and shiny; if it is dull and black, you can clean 
it with a commutator cleaning stone.
17.  To  clean  the  commutator,  press  the  commutator  cleaning  stone  against  the 
commutator  and  rotate  the  armature  by  turning  the  spindle  shaft  by  hand.  
Continue for a minute or until commutator is clean and shiny.
18.  Reconnect  the  power  wire,  ensuring  that  the  wire  path  is  correct.    Reinstall 
the  carbon  brush  holder  into  the  slot  on...

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ALPHA® VSP-120 SCHEMATIC  

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ALPHA® VSP-120 PARTS LIST
DRAWING NO.PART NO.DESCRIPTION QUANTITY
1 210001Screw M4×14 4
2 210002Spring Washer 4 5
3 210003Plain Washer 4 4
4 210004Shower Bolt 1
5 210109Output Shaft with Nitriding 120V (5/8”-11UNC) 1
6 210006Key 3×10 2
7 210090Gear Case Cover 1
8 210008Oil lip seal B16×28×7D 2
9 210009Bearing  Washer 1
10 210010Ball bearing NSK6201-2DW 1
11 210011Gear Washer 1
12 210012Thrust Bearing 15×28×6 1
13 210013Bearing Clamp 1
14 210014Spring Washer 5 4
15 210015Screw M5×16 4
16 210016Gear 1...

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ALPHA® VSP-120 PARTS LIST
DRAWING NO.PART NO.DESCRIPTION QUANTITY
39 210039Rubber Bearing Seat 1
40 210106Windshield 1
41 210041Self-tapping Screw ST4.2×70 2
42 210042Field Coil 1
43 210099Brand Label 1
44 210091Field Coil Case 1
45 210092Data Label 1
46 210046Carbon Brush Holder 2
47 210047Coil Spring 2
48 210048Carbon brush   2
49 210049SST Self-tapping Screw ST2.9×8 4
50 210094Terminal Block 1
51 210093Speed pot w/Feed-back sensor 120V  1
53 210053Rear Cover 1
54 210054Self-tapping Screw ST4.2×14...

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ALPHA® VSP-120 PARTS LIST
SERVICES AND WARRANTY INFORMATION
LOANEr PrOGrAM
Loaner tools can be issued to temporarily replace a tool that is being returned to 
Alpha® for repair.  If more than one tool is being returned for repair, the number of 
loaner tools provided will be based on availability.
If  a  loaner  tool  is  required,  contact Alpha
® Tool  Department  at  (800)  648-7229  to 
receive a Loaner Tool Application. A valid credit card number must be provided as a 
security deposit. The...