Alpha Tool.Com.HK Limited Polisher VSP320 ver 1 User Manual

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PERIODIC
  WARNING!
Preventive  maintenance  preformed  by  unauthorized  personnel  may  result  in 
misplacing of internal wires and/or components which voids the warranty and could 
cause serious hazards.  We recommend that tool service and repairs not covered in 
the manual be preformed by an Alpha
® Repair Center.
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...

21
 REAR COVER REMOVAL
1.     Gently  pull  water  tube  away  from 
holder.
2.    Release the tube from the holder.
3.  Unwrap  3  inches  of  the  EasyOn 
EasyOff sleeve.
4.    Remove the 2 screws from the valve 
bracket.
Figure-25
Figure-26 Figure-27
Figure-28  

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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-29
Figure-30
Figure-31
Figure-32  

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Carbon Brush
Carbon BrushHolder
Carbon Brush Wire
Spring
Figure-33
Figure-34
Figure-35 Figure-36
9. 
  Lift  the  spring  from  the 
carbon brush and place on 
the side of the brush holder, 
as shown in Figure 34.
10.    Remove  the  carbon  brush 
wire  quick-disconnect 
terminal  from  the  terminal 
post  and  then  remove  the 
carbon brush, as shown in 
Figures 35 & 36.
Quick-disconnect
Terminal  

24
The Carbon Brushes may become 
stuck in the holder from a build-up 
of stone dust causing the motor to 
sputter and stop running.
11.    You  can  also  remove  the  carbon  brush  by 
removing the screw and pulling the holder out 
with  a  pair  of  needle  nose  pliers,  as  shown 
in Figure 37.
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....

25
16. The commutator should be clean and shiny; if it is dull and black, you can clean 
it with a commutator cleaning stone (Alpha® Part No. AT006).
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...

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ALPHA® VSP-320 SCHEMATIC  

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ALPHA® VSP-320 PARTS LIST
DRAWING NO.PART NO.DESCRIPTION QUANTITY
1 210004Shower Bolt 1
2 210109Output Shaft (5/8”-11 UNC) 1
3 210006Key (3x10) 1
4 210111Combination Screw M4×14 4
5 210090Gear Case Cover 1
6 210008Oil lip seal B16×28×7D 2
7 210009Bearing Washer 1
8 210010Ball Bearing 6201 1
9 210011Gear Washer 1
10 210012Thrust Bearing 15×28×6 1
11 210112O-Ring (15×2.65) 1
12 210013Bearing Clamp 1
13 210113Combination Screw M5×16 4
14 210114Gear 1
15 210018C-clip for shaft 10 1
16...

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ALPHA® VSP-320 PARTS LIST
DRAWING NO.PART NO.DESCRIPTION QUANTITY
42 210123Data Label 1
43 210049SST Self-tapping Screw 2.9×8 4
44 210048Carbon Brush 120V Set 1
45 210046Carbon Brush Holder 2
46 210047Coil Spring 2
47 210094Terminal Block 1
48 210135Speed pot w/Feed-back sensor 120V 1
50 210053Rear Cover 1
51 210054Self-tapping Screw 4.2×14 3
52 210055Cord Jacket 1
53 210124Memory Wrap (1m) 1
54 210108Rubber Band 1
55 210107Ventilation Cap 1
56 210125GFCI 120V 1
57 210126Power Supply Cord 1
60...

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All the accessories can be purchased at a local distributor in your area.  For 
more information concerning Alpha® Variable Speed Polisher (VSP-320) and 
factory service, please contact the Alpha® distribution centers listed below.
COMPANY HEADQUARTERS     Alpha Professional Tools
®  
& REPAIR CENTER:       103 Bauer Drive
     Oakland, NJ 07436
Hours of Operation:       8:30 a.m. – 5:00 p.m. EST
Telephone Number:       201-337-3343
Toll-Free Number:       800-648-7229
CANADIAN REPAIR CENTER:...