Alpha Tool.Com.HK Limited Polisher WDP120 User Manual

							Model No.:  WDP-120Version 3
Alpha® Wet/Dr y Polisher
Instruction Manual
MANUAL
103 Bauer Drive, Oakland, NJ 07436 • 800-648-7229 • Fax: 800-286-0114 www.alpha-tools.com
WARNING:  To reduce the risk of injury, user must read and understand instruction manual! 
						

							2
TABLE OF CONTENTS
WDP-120 Overview ........................................................................\
............................3
Specifications ........................................................................\
....................................3  
	 Accessories ........................................................................\
.............................4
	 Attachment	-	Guard ........................................................................\
.................5
Introduction ........................................................................\
........................................6
	 About	The	Symbols ........................................................................\
.................6
	 Electrical	Symbols ........................................................................\
..................6
General	Safety	Rules ........................................................................\
.........................7
	 Work	Area ........................................................................\
.................................7
	 Electrical	Safety ........................................................................\
.......................7
	 Personal	Safety ........................................................................\
.......................7
	 Tool	Use	and	Care ........................................................................\
...................8Service ........................................................................\
......................................8
	 Specific	Safety	Rules ........................................................................\
..............9
	 Use	Proper	Extension	Cords  ........................................................................\
10
	 Grounding	Instructions ........................................................................\
........10
	 Additional	Precautions	For	Using	The	WDP-120 ........................................10
	 Laws	And	Regulations	Of	Noise	Levels ...................................................... 11
Guard	Installation ........................................................................\
............................12
Attaching	A	Backer	Pad	To 	WDP-120 ....................................................................13
Attaching	Rubber	Cap	To 	WDP-120 .......................................................................13
WDP-120	Wet 	Operation ........................................................................\
.................14
WDP-120	Dry	Operation ........................................................................\
..................14
WDP-120	Polish	Right	Up	to	the	Wall ....................................................................15
WDP-120	Wet/Dry	Concrete	Polisher	Operation ...................................................16
	 Main	Connection ........................................................................\
...................16
	 Switching	On	And	Off ........................................................................\
...........16
	 Ground	Fault	Circuit	Interrupter	(GFCI)  ......................................................17
	 Testing	In-line	GFCI	Unit	(Before	Each	Use	Of	The	Polisher)  ...................18
	 Variable	Speed	Adjustment ........................................................................\
..18
	 Speed	Pot	Feedback	Sensor ........................................................................\
19
	 Water	Control	Valve  ........................................................................\
...............19
	 Water-Feed	Attachment ........................................................................\
........20
MAINTENANCE	  ........................................................................\
...............................20  
	 Bearings	and	gears ........................................................................\
...............21
	 Carbon	Brush	Replacement	  ........................................................................\
21
	 Rear	Cover	Removal ........................................................................\
.............22
Alpha
®	WDP-120	Schematic	 ........................................................................\
..........27
Alpha®	WDP-120	Guard	Schematic ........................................................................\
28
Alpha®	WDP-120	Parts	list ........................................................................\
..............29
Loaner	Program  ........................................................................\
...............................32 
Warranty ........................................................................\
...........................................32
Appendix	A  ........................................................................\
..........................................i  
	 Frequently	Asked	Questions ........................................................................\
...i
Product	Registration	Card  ........................................................................\
..............33 
						

							3
WDP-120 OVERVIEW
  SPECIFICATIONS
Rating ........................................................................\
.... 120 V
Amperage ......................................................................7A  
Wattage ........................................................................\
.. 800W
Speed	(Variable) ........................................................... 500~2800	RPM
Weight ........................................................................\
. 	 7.3	Lbs	/	3.3kg
Spindle ........................................................................\
 	 5/8”-11
Figure-1
WET
DRY 
						

							4
 ACCESSORIES 
						

							5
 ATTACHMENT-	GUARD
Connector Main	Unit
Sub	Cover
Half	Cover
COMPONENTS:
1. 
Main	Unit
2.  Connector
3.  Half	Cover
4.  Sub	Cover
Figure-3 
						

							6
INTRODUCTION
Thank	you	for	purchasing	the	Alpha®	Wet/Dry	Concrete	Polisher.		Please	read	this	
instruction	 manual	thoroughly	 to	ensure	 safety	and	correct	 use	of	the	 polisher.		 Keep	
this	manual	in	a	place	where	operators	can	access	it	easily	whenever	necessary.
	ABOUT	THE	SYMBOLS
According	 to	 the	 hazard	 level,	 all	 safety	 notes	 in	 this	 manual	 are	 classified	 into	
“DANGER”,		“WARNING”,	and	“CAUTION”.
		DANGER!	 Death	 or	 serious	 personal	 injury	 is	 imminent	 when	 handling	 this	polisher	incorrectly.
		WARNING!	 There	is	a	possibility	of	death	or	serious	personal	injury	when	 handling	this	polisher	incorrectly.	
		CAUTION!	 There	 is	 a	 possibility	 of	 personal	 injury	 or	 property	 damage	when	handling	this	polisher	incorrectly.
NOTE:		In	some	situations,	failing	to	observe	WARNING	notes	could	result	in		 death	or	serious	personal	injury.		 Be	sure	to	read	and	observe	the	safety	notes	
to	ensure	safety	and	correct	use	of	the	polisher.		
ELECTRICAL	SYMBOLS
The	following	show	the	symbols	used	for	tool.
V			 Volts
A			 Amperes
Hz	 	 Hertz
~	or	a.c.	 Alternating	Current
n0	 	 No	load	speed
…/min	 Revolution	or	reciprocation	per	minute
kg	 	 Kilograms
  Protective	Earth 
						

							7
  CAUTION!
The	following	are	important	notes	for	products,	operation,	and	maintenance	appli-
cable	to	this	polisher.
GENERAL	SAFETY	RULES
	WORK	AREA
•	 Keep	your	work	area	clean	and	well	lit.		 Cluttered	benches	and	dark	areas	invite	
accidents.
•	 Do	not	operate	power	tools	in	explosive	atmospheres,	such	as	in	the	presence	 of	flammable	liquids,	gases,	or	dust.		Power	tools	may	create	sparks	which	may	
ignite	the	dust	or	fumes.
•	 Keep	 bystanders,	 children,	and	visitors	 away	while	 operating	 a	 power	tool.	
Distractions	can	cause	you	to	lose	control.
	ELECTRICAL	SAFETY
•	 Grounded	tools	must	be	plugged	into	an	outlet	properly	installed	and	grounded	 in	accordance	 with	all	codes	 and	ordinances.	 Never	remove	 the	grounding	 prong	
or	modify	the	plug	in	any	way.	Do	not	use	any	adaptor	plugs.	Check	with	a	quali -
fied	electrician	if	you	are	in	doubt	as	to	whether	the	outlet	is	properly	grounded.		
If	the	tools should	electrically	malfunction	or	break	down	grounding	provides	a	
low	resistance	path	to	carry	electricity	away	from	the	user.
•	 Avoid	body	contact	with	grounded	surfaces,	such	as	pipes,	radiators,	ranges,	 and	 refrigerators.		There	 is	 an	 increased	 risk	 of	 electric	 shock	 if	 your	 body	 is	
grounded.
•	 Don’t	expose	power	tools	to	rain	or	wet	conditions.		 Water	entering	a	power	tool	
will	increase	the	risk	of	electric	shock.
•	 Do	not	 abuse	 the	cord.		 Never	 use	the	cord	 to	carry	 the	tools	 or	pull	 the	plug	 from	
an	 outlet. 		Keep	 cord	away	 from	heat, 	oil,	sharp 	edges,	 or	moving	 parts.		Replace 	
damaged	 cords	immediately.		 Damaged	cords	increase	 the	risk	 of	electric	 shock.
•	 When	 operating	 a	 power	 tool	 outside,	 use	 an	 outdoor	 extension	 cord	 marked	 “W-A”	 or	 “W”.		 These	 cords	 are	 rated	 for	 outdoor	 use	 and	 reduce	 the	 risk	 of	
electric	shock.
	PERSONAL	SAFETY
•	 Stay	alert,	watch	what	you	are	doing	and	use	common	sense	when	operating	a	 power	tool.		 Do	not	use	tool	while	tired	or	under	the	influence	of	drugs,	alcohol,	
or	medication.			 A	moment	of	inattention	while	operating	power	tools	may	result	
in	serious	personal	injury.
•	 Dress	properly.		Do	not	wear	loose	clothing	or	jewelry.		Contain	long	hair.		Keep	 your	hair,	clothing,	and	gloves	away	from	moving	parts.		Loose	clothes,	jewelry,	
or	long	hair	can	be	caught	in	moving	parts	or	drawn	into	air	vents.
•	 Avoid	 accidental	 starting.		Be	 sure	switch	 is	off	 before	 plugging	 in.		Carrying 	 
						

							8
tools	with	your	 finger	 on	the	 switch	 or	plugging	 in	tools	 that	have	 the	switch	 on,	
invites	 accidents.
•	 Remove	adjusting	keys	or	wrenches	before	turning	the	tool	on.			 A	wrench	or	a	
key	 that	 is	left	 attached	 to	a	rotating	 part	of	the	 tool	 may	 result	 in	personal	 injury.
•	 Do	not	overreach.		Keep	proper	footing	and	balance	at	all	times.		 Proper	footing	
and	balance	enables	better	control	of	the	tool	in	unexpected	situations.		Do	not	
use	on	a	ladder	or	unstable	support.
•	 Use	safety	equipment.			 Always	wear	eye	protection.		Dust	mask,	nonskid	safety	
shoes,	hard	hat,	or	hearing	protection	must	be	used	for	appropriate	conditions.
 TOOL	USE	AND	CARE
•	 Use	 clamps	 or	 other	 practical	 way	 to	 secure	 and	 support	 the	 workpiece	 to	 a	 stable	platform.		 Holding	the	work	by	hand	or	against	your	body	is	unstable	and	
may	lead	to	loss	of	control.
•	 Do	not	force	tool,	use	the	correct	tool	for	your	application.		 The	correct	tool	will	
do	the	job	better	and	safer	at	the	rate	for	which	it	is	designed.
•	 Do	 not	 use	 tool	 if	 switch	 does	 not	 turn	 it	 on	 or	 off.			 Any	 tool	 that	 cannot	 be	
controlled	with	the	switch	is	dangerous	and	must	be	repaired.
•	 Disconnect	the	plug	from	power	source	before	making	any	adjustments,	chang -
ing	accessories,	or	storing	the	tool.		Such	preventive	safety	measures	reduce	
the	risk	of	starting	the	tool	accidentally.
•	 Store	idle	tools	out	of	the	reach	of	children	and	other	untrained	persons.		Tools	 are	dangerous	in	the	hands	of	untrained	users.
•	 Maintain	tools	with	care.			 Keep	tools	sharp	and	clean	for	better	and	safer	perfor -
mance.	Follow	instructions	for	lubricating	and	changing	accessories.		Inspect	
the	electrical	cord	periodically	and	if	damaged,	have	it	repaired	by	authorized	
service	 facility.		Inspect	 extension	 cords	 periodically	 and	 replace	 if	 damaged.		
Keep	handles	dry,	clean	and	free	from	oil	and	grease.
•	 Check

	for	damaged	parts.		Before	using	the	tool	each	day,	a	guard	or	other	part	
that	 is	 damaged	 should	 be	 carefully	 checked	 to	 determine	 that	 it	 will	 operate	
properly	 and	 perform	 its	intended	 function.		 Check	for	alignment	 of	moving 	
parts,	breakage	of	parts,	mounting,	and	any	other	conditions	that	may	affect	its	
operation.		 A	guard	or	other	part	that	is	damaged	should	be	properly	repaired	or	
replaced	by	an	authorized	service	center	unless	otherwise	indicated	elsewhere	
in	this	instruction	manual.		 Have	defective	switches	replaced	by	authorized	ser -
vice	center.		Do	not	use	the	tool	if	it	cannot	be	turned	on	and	off	by	the	switch.
•	 Use	only	 accessories	 that	are	recommended	 by	the	 manufacturer	 for	your	 model. 	
Accessories	 that	 may	 be	 suitable	 for	 one	 tool,	 may	 become	 hazardous	 when	
used	on	another	tool.
	SERVICE
•	 Tool	service	must	be	performed	only	by	qualified	repair	personnel.		Service	or	 maintenance	performed	by	unqualified	personnel	could	result	in	a	risk	of	injury.
•	 When	 servicing	a	 tool,	use	only	 identical	 replacement	 parts.		Follow	 instructions	
in	the	Maintenance	section	of	this	manual.		 Use	of	unauthorized	part	or	failure	
to	follow	Maintenance	Instructions	may	create	a	risk	of	electric	shock	or	injury. 
						

							9
	SPECIFIC	SAFETY	RULES
•	Accessories	 must	be	 rated 	for	 at	least 	the 	speed	 recommended	 on	the 	tool	
warning	label.		 Wheels	and	other	accessories	running	over	rated	speed	can	fly	
apart	and	cause	injury.
•	 Hold	tool	by	insulated	gripping	surfaces	when	performing	an	operation	where	 the	cutting	tool	may	contact	hidden	wiring	or	its	own	cord.		Contact	with	a	“live”	
wire	will	make	exposed	metal	parts	of	the	tool	“live”	and	shock	the	operator.
•	 Know	your	power	tool.		 Read	operator`s	manual	carefully.		 Learn	its	application	
and	 limitations,	 as	 well	 as	 the	 specific	 potential	 hazards	 related	 to	 this	 tool.		
Following	this	rule	will	reduce	the	risk	of	electric	shock,	fire,	or	serious	injury.
•	 Always	wear	safety	glasses	with	side	shields.		 Everyday	eye-glasses	have	only	
impact	resistant	lenses;	they	are	NOT	safety	glasses.	
•	 Protect	your	lungs.		Wear	a	face	or	dust	mask	if	the	operation	is	dusty.	
•	 Protect 	your 	hearing. 		Wear 	hearing 	protection 	during 	extended 	periods 	of 	
operation.	
•	 Inspect	 tool	 cords	 periodically	 and	 if	 damaged,	 have	 repaired	 at	 your	 nearest	 Factory	 Service	 Center	 or	 other	Authorized	 Service	 Organization.		Constantly	
stay	aware	of	cord	location.	
•	 Check	damaged	parts.		 Before	further	use	of	the	tool,	a	guard	or	other	part	that	
is	 damaged	 should	be
	carefully	 checked	to	determine	 that	it	will	 operate	 properly 	
and	 perform	 its	intended	 function.		Check	 for	alignment	 of	moving	 parts,	binding 	
of	 moving	 parts,	breakage	 of	parts,	 mounting,	 and	any	other	 conditions	 that	may	
affect	its	operation,	A	guard	or	other	part	that	is	damaged	should	be	properly	
repaired	or	replaced	by	an	authorized	service	center.	
•	 Do	not	abuse	cord.		Never	carry	the	tool	by	the	cord	or	yank	it	to	disconnect	it	 from	the	receptacle.		Keep	cord	away	from	heat,	oil,	and	sharp	edges.		Following	
this	rule	will	reduce	the	risk	of	electric	shock	or	fire.
•	 Make	sure	your	extension	cord	is	in	good	condition.		 When	using	an	extension	
cord,	 be	 sure	 to	 use	 one	 heavy	 enough	 to	 carry	 the	 current	 your	 product	 will	
draw.	An	undersized	cord	will	cause	a	drop	in	line	voltage	resulting	in	loss	of	
power	and	overheating.
•	 Inspect	 for	and	 remove	 all	foreign	 objects	 from	workpiece	 before	polishing. 		
Follow	this	rule	will	reduce	the	risk	of	serious	personal	injury.
•	 Drugs,	 alcohol,	 medication,	 Do	 not	 operate	 tool	 while	 under	 the	 influence	 of	 drugs,	 alcohol,	 or	any	 medication.		 Follow	this	rule	 will	reduce	 the	risk	 of	electric	
shock,	fire,	or	serious	personal	injury.
•	 Keep	hands	away
	from	polishing	area.		 Follow	this	rule	will	reduce	the	risk	of	
cuts,	scrapes,	or	serious	personal	injury.
•	 Ground	 Fault	 Circuit	 Interrupter	 (GFCI)	 protection	 should	 be	 provided	 on	 the	 circuit	or	outlet	to	be	used	for	the	tool.		 Receptacles	are	available	having	built-in	
GFCI	protection	and	may	be	used	for	this	measure	of	safety.
•	 Save	 these	 instruction.		 Refer	to	them	 frequently	 and	use	them	 to	instruct 	
others	who	may	use	this	tool.		If	you	loan	someone	this	tool,	loan	them	these	
instructions. 
						

							10
		USE	PROPER	EXTENSION	CORDS
Use	only	 three-wire	 extension	cords	that	have	 three-prong	 grounding-type	 plugs	and	
three-pole	receptacles	that	accept	the	tool’s	plug.		Make	sure	your	extension	cord	
is	in	good	condition.		 Replace	or	repair	damaged	or	worn	cord	immediately.		 When	
using	an	extension	cord,	be	sure	to	use	one	heavy	enough	to	carry	the	current	your	
product	will	draw.		 An	undersized	cord	will	cause	a	drop	in	line	voltage	resulting	in	
loss	of	power	and	overheating.		 Below	table	shows	the	correct	size	to	use	depend -
ing	on	cord	length	and	nameplate	ampere	rating.		 If	in	doubt,	use	the	next	heavier	
gauge.		The	smaller	the	gauge	number,	the	heavier	the	cord.
Ampere Rating Total length of cord in feet (120V )
25ft 50ft 100ft 
More 
Than Not More 
Than AW G
0 6 18  16  16
6 10 18  16 14
10 12 16 16  14
12 16 14 12Not Recom-
mended
		GROUNDING	INSTRUCTIONS
This	 tool	should	 be	grounded	 while	in	use	 to	protect	 the	operator	 from	electric	 shock.		
The	tool	is	equipped	with	a	three-conductor	cord	and	three-prong	grounding	type	
plug	to	fit	the	proper	grounding	type	receptacle.		 The	green	(or	green	and	yellow)	
conductor	in	the	cord	is	the	grounding	wire.		Never	connect	the	green	(or	green	and	
yellow)	wire	to	a	live	terminal.
  ADDITIONAL	PRECAUTIONS	FOR	USING	THE	WDP-120
In	 addition	 to	the	 general	 safety	notes	described	 on	the	 preceding	 pages,	please	read	
and	observe	the	following	precautionary	notes	before	using	the	polisher.
  DANGER!
1.	 Check	the	working	voltage.
	 Be	sure	the	voltage	available	at	power	outlet	matches	specified	voltage	on	the	 nameplate.		If	the	polisher	is	used	with	higher	voltage	than	specified,	the	mo -
tor	will	burnout.		 Any	attempts	to	do	so	may	damage	the	polisher	or	cause	an	
accident	or	injury.		
2.	 Inspect	all	polishing	discs.
	 Never	use	cracked,	chipped	or	damaged	polishing	discs.
3.	 Hold	the	polisher	tightly	at	start-up.