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 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  send  the  tool  back  to  an Alpha
®  Repair  Center  after  about  300  to  400  hours  of 
operation or every second carbon brush set change. The bearings should be replaced 
and  the gears  should  be checked.  If your tool starts to sound  differently, this could 
be an indication of a worn bearing; continuing to use the tool in this condition could 
result in over heating or motor failure.
 CARBON BRUSH REPLACEMENT
Carbon brushes wear out over time, based on the polisher usage. If a carbon brush 
is worn out, it may cause the motor to malfunction or fail to run. Whenever the length 
of the carbon brush reaches the wear limit, replace with a new set.
NOTE - To maintain even wear, both brushes should be replaced at the same time. 
The carbon brushes in this polisher are located underneath the Rear Cover (Part # 
210053) as shown in Figure 24.
Carbon brushes are located 
beneath the ventilation cap located 
under the rear cover
Figure-24  
						

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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  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  
						

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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.
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 reversing disassembly procedure.
13.  Check the carbon brush for wear.  Replace if worn down to a 1/4" .
14.  Blow dust off of the spring and check for proper tension.
15.    Remove  the  old  carbon  brush  and  quick  disconnect  from  the  carbon  brush 
holder  terminal.  If  the  inside  of  the  holder  is  filled  with  dust,  clean  before 
installing the new carbon brush.  Upon installation of the new carbon brush, 
make  sure  the  twisted  wire  is  in  the  slot  and  behind  the  wire  terminals  on 
holder as in the photo above.
New Carbon Brush 
Old Carbon Brush
worn down to a quarter of 
an inch (1/4”).
Figure-38 Figure-37  
						

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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 (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  into  the  slot  on  motor  housing  and  slide  in  until  the 
tab for the screw hits the stop.Install the screw using light pressure to prevent 
it from stripping.
19.    After both carbon brushes have been replaced you can reassemble the rear 
cover. Make sure the power wires are in the tool to prevent pinching of the wires.
CleanDirty
Figure-39 Figure-40
Figure-41  
						

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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 210019Oil-impregnated Bearing 8×12×8 2
17 210021Self-tapping Screw 4.2×45 2
18 210115Self-tapping Screw 4.2×40 2
19 210023Screw M10×20 2
20 210024C-handle 1
21 210134Case Plastic Cover 1
22 210027Gear Case 1
23 210076Dash Panel 1
24 210116Sealing Ring 1
25 210117Pinion Gear Sub Assembly 1
27 210033Screw M4×8 2
29 210118Bearing Retainer 1
30 210035O-Ring (21.2×1.8) 1
31 210036Ball Bearing 608 1
32 210119Combination Screw M4×8 1
33 210120Wire Lead (Circular lugs 4#) 1
34 210121Armature 120V 1
35 210095Magnetic Ring 1
36 210038Ball Bearing 607 1
37 210039Rubber Bearing Seat 1
38 210106Wind Shield 1
39 210041Self-tapping Screw 4.2×70 2
40 210122Field Coil 120V 1
41 210091Field Coil Case 1  
						

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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 210128Lock Washer 3/8” 1
61 210129Water Hose Assembly (15ft./5m) 1
63 210078Self-tapping Screw 4.2×10 2
65 210063Water Valve Bracket 1
66 210064Water Valve Assembly 1
67 210132Nut M10 2
68 210065Water Hose 6mm ODx8in (20cm) 1
69 210067Outlet Tap 1
70 210066Cord Clamp 1
71 210068Switch 1
72 210070Switch Push Lever 1
73 210069Back Moving Spring 1
74 210133Brand Label 1
75 210071Switch Push Button 1
76 210074Side Handle 1
77 210110Open End Wrench (19mm) 1
78 210048Spare Set of Carbon Brushes 1
79 210088Band Clamp 40-63 1
80 210089Splash Guard 1
OPTIONAL/SOLD SEPARATELY
81 110301Flange (5/8”-11) for Variable Drive 1
82 210301Locknut (5/8”-11) for Variable Drive 1
83 210105Pin Wrench 1  
						

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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:   Edgewood Sales & Marketing
          10 Simon Court
     Waterford, ON N0E 1Y0
Telephone Number:       519-896-4992
Limited Warranty of Alpha® Variable Speed Polisher (VSP-320) for USA and 
Canada ONLY!
Alpha Professional Tools
® warrants this product against defects in material and 
workmanship  for  a  period  of  one  year  from  the  date  of  original  retail  purchase 
(proof of purchase required). If Alpha Professional Tools
® receives notice of such 
defects during the warranty period, our obligation assumed under this warranty is 
limited to the repair or replacement of parts, without charge. This warranty does 
not  apply  to Alpha
®  accessories.  Returns  within  the  warranty  period  should  be 
sent in freight prepaid to an Authorized Warranty Service Centers.
The warranty does not apply in situations where: • The tool has been misused, abused or improperly maintained
•  Alterations or repairs were made by others
•  Repairs due to normal wear and tear
Some  States  do  not  allow  limitations  on  how  long  an  implied  warranty  lasts  or 
the exclusion or limitation of incidental or consequential damages, so the above 
limitation may not apply. This warranty gives you specific legal rights and you may 
also have other rights which vary from state to state.
For Warranty Claims:  Send complete tool with all your information and details 
of the problem to an Authorized Warranty Repair Center, transportation prepaid. 
Do not send tool accessories.
  ACCESSORIES  AND FACTORY SERVICE
  WARRANTY