Spot Welder
Model 45689
Set up and operating inStructionS
read this material before using this product.
Failure to do so can result in serious injury.
SaVe thiS Manual.
Copyright© 2001 by Harbor Freight Tools®. All rights reserved. No portion of this manual or any
artwork contained herein may be reproduced in any shape or form without the express written
consent of Harbor Freight Tools. Diagrams within this manual may not be drawn proportionally.
Due to continuing improvements, actual product may differ slightly from the product described
herein. Tools required for assembly and service may not be included.
For technical questions or replacement parts, please call 1-800-444-3353.
Manual Revised 10g
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8. do not oVerreach. Keep proper footing and balance at all times to prevent tripping,
falling, back injury, etcetera.
9. StaY alert. Watch what you are doing at all times. Use common sense. Do not use this
product when you are tired or distracted from the job at hand.
10. checK For daMaged partS. Before using this product, carefully check that it will
operate properly and perform its intended function. Check for damaged parts and any other
conditions that may affect the operation of this product. Replace or repair damaged or worn
parts immediately.
11. replaceMent partS and acceSSorieS. When servicing, use only identical
replacement parts. Only use accessories intended for use with this product. Approved
accessories are available from Harbor Freight Tools.
12. Maintain thiS product With care. Keep this tool clean and dry.
13. Maintenance: For your safety, service and maintenance should be performed regularly
by a qualified technician.
14. uSe the right product For the right JoB. There are certain applications for
which this product was designed. Do not use small equipment, tools or attachments to do
the work of larger industrial equipment, tools or attachments. Do not use this product for a
purpose for which it was not intended.
SpeciFic product WarningS and precautionS
1. ground thiS product. the supplied electrical power cord plug for this product
is a grounded, 115 Volt, 3-prong plug. Never remove the grounding prong or modify the
Plug in any way. Do not use adapter plugs with this product. When in use, make sure this
product is always plugged into a grounded, 115 Volt, 3-hole electrical receptacle with an
appropriate breaker switch inline.
2. MaKe Sure the control SWitch (part #25) iS in the “oFF” poSition BeFore
plugging in the poWer cord. (See Figure d, and assy. diagram.)
3. do not aBuSe the poWer cord. Do not use the Cord to pull the 3-Prong Plug from
a power outlet. Keep Cord away from heat, oil, sharp edges, and moving parts. Replace
damaged Cord immediately. Route the Power Cord safely. Protect it from being damaged
by other equipment in the shop. Do not route the Cord where it can be walked on or tripped
over.
4. Maintain a SaFe WorK enVironMent. Do not use this product in or near damp or
wet areas. Do not expose this product to rain. Keep work area well lit. Make sure there is
adequate surrounding work space. Use this product in a well ventilated area. (Read Material
Safety Data Sheets/MSDS for metals, coatings, and cleaners.) Do not operate this product
Rev 02/02
SKU 45689
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in the presence of flammable liquids, gases, or dust. To avoid accidental electric shock, do
not let your body come in contact with grounded surfaces such as pipes, radiators, ranges
and refrigerators. Always keep a fire extinguisher nearby.
5. do not Force the eQuipMent. This Spot Welder will do the work better and safer at
the speed and capacity for which it was designed.
6. aVoid unintentional Starting. Make sure you are prepared to begin work before
turning the Control Switch (part #25) “ON”.
7. caution: Never touch the Upper and Lower Tongs (parts #46, #47) when welding a
workpiece. Allow the Tong Tips (part #48) and the workpiece to cool before handling. (See
Figures a, B, e, and assy. diagram.)
8. MaKe Sure the WorKpiece iS Secured at all tiMeS during operation.
Use a vise, clamps, etcetera (not provided).
9. oVeruSe can cauSe oVerheating. After continuous use, allow the Spot Welder
adequate time to cool before the next use.
10. BeFore trYing neW or coMplicated techniQueS, StudY the procedure,
and practice With Scrap Metal.
11. alWaYS diSconnect the Spot Welder FroM itS electricalSupplYSource
BeFore aSSeMBling, perForMing anY SerViceS or Maintenance always
disconnect the electrical cord before leaving the work area, moving the tool from one location
to another, handing the tool to another person, changing Tong Tips (part #48), cleaning the
unit, etcetera.
12. Warning: This product, when used for welding and similar applications, produces chemicals
known to the State of California to cause cancer and birth defects (or other reproductive
harm). (California Health & Safety Code 25249.5 et seq.)
13. Warning: Operation of equipment in close proximity to a heart pacemaker could cause
interference or failure of the pacemaker.
reV 05/04
SKU 45689
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unpacKing
When unpacking, check to make sure all parts shown on the Parts List (page 12) are included.
If any parts are missing or broken, please call Harbor Freight Tools at the number shown on
the cover of this manual as soon as possible.
aSSeMBlY inStructionS
note: For additional references to the parts listed below, refer to the assembly dia-
gram on page 13 of this manual.
To Attach The Upper And Lower Tongs:
1.
2.
3.
4.
5.
caution: Prior to attaching the Upper and Lower Tongs (parts #46, #47), make sure the
Spot Welder is disconnected from its electrical power source.
note: Make sure the Upper and Lower Tongs (parts #46, #47) are clean and not cor-
roded before installing. If necessary, clean the Tongs with steel wool.
To attach the Lower Tong (part #47) to the Spot Welder, loosen the four Cap Screws
(part #3) located at the bottom/front of the tool. (See Figure a, and assy. diagram.)
Slide the Lower Tong (part #47) between the Tong Insulator (part #33) and Lower Tong
Clamp (part #35), and position the Lower Tong so that the Tong Tip (part #48) faces up.
NOTE: Check to make sure the Lower Tong (part #47) will align with the Upper Tong
(part #46) when fully assembled. (See Figure B, and assy. diagram.)
6.
7.
Retighten the four Cap Screws (part #3).
To attach the Upper Tong (part #46) to the Spot Welder, loosen the four Cap Screws
(parts #3, #11) located at the top/front of the tool. (See Figure a, and assy. diagram.)
8.
9.
Slide the Upper Tong (part #46) between the Tong Top Holder (part #12) and Upper
Tong Clamp (part #13), and position the Upper Tong so that the Tong Tip (part #48)
faces down.
NOTE: Check to make sure the Upper Tong (part #46) will align with the Lower Tong
(part #47) when fully assembled. (See Figure B, and assy. diagram.)
SKU 45689
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10.
Retighten the four Cap Screws (parts #3, #11).
CAP
SCREW
(#3)
OPERATING
LEVER
(#5)
TOP TONG
HOLDER (#12)
BOTTOM TONG
CLAMP (#35)
UPPER
TONG
(#46)
HEX JAM NUT (#10)
HEX JAM NUT (#10)
HEX NUT (#20)
TONGTIP
(#48)
TOP TONG
CLAMP (#13)
TONG
INSULATOR
(#33)
LOWER
TONG
(#47)
CAP
SCREW
(#34)
Figure a
TONG ALIGNMENT
UPPER TONG (#46)
UPPER TONG (#46)
TONG TIPS (#48)
TONG TIPS (#48)
LOWER TONG (#47)
LOWER TONG (#47)
Figure B
To Attach The Handle To The Spot Welder:
1.
To attach the Wooden Handle (part #17) to the Spot Welder, insert the Bolt (part #19)
through the following parts in this order: through a Handle Bracket (part #18), through
the Wooden Handle, and through the remaining Handle Bracket. Then, secure the parts
together, using the Lock Washer (part #49) and Hex Nut (part #20). (See Figure c, and
assy. diagram.)
SKU 45689
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2.
Next, Attach the complete Handle Assembly (parts #17, #18, #19, #20) to the Front
Housing (part #28) of the Spot Welder, using the four Hex Head Screws (part #16).
(See Figure d, and assy. diagram.)
WASHER
HANDLE (#17)
BOLT (#19)
HEX
NUT
(#20)
HANDLE BRACKET
(#18)
Figure c
POWER SWITCH (#25)
(#25)
HEX SCREW (#16)
Figure d
To Attach Tong Tips To The Spot Welder:
1.
2.
caution: Prior to attaching the Tong Tips (parts #48), make sure the Spot Welder is
disconnected from its electrical power source.
To attach the Tong Tips (part #48) to the Upper and Lower Tongs (parts #46, #47),
screw the Tips onto the Tongs as shown in Figure e.
UPPER TONG (#46)
LOWER TONG (#47)
TONG TIP (#48)
Figure e
SKU 45689
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operating inStructionS
note: For additional references to the parts listed below, refer to the assembly dia-
gram on page 13 of this manual.
To Adjust The Tong And Operating Lever Pressure:
1.
2.
caution: Prior to adjusting the Tongs (parts #46, #47) and Operating Lever (part #5)
pressure, make sure the Spot Welder is disconnected from its electrical supply source.
note: Excessive Tong (parts #46, #47) can damage the Tong Tips (part #48). Do not
use the Tongs as a clamp or vice to hold the workpieces together. If the workpieces to
be welded do not make good contact at the point of the intended weld, clamp the work-
pieces together to provide good contact between the surfaces. (See Figures a, and
assy. diagram.)
3.
4.
The Tongs (parts #46, #47) pressure is adjustable, and should be checked and/or set
before operation. Correct Tong pressure is necessary to create a proper weld and to
prevent damage to the Tong Tips (part #48). (See Figures a, F, and assy. diagram.)
If the Tongs (parts #46, #47) pressure is too weak, and the workpieces are loose
when the Tongs close severe arcing will occur between the workpieces and no weld can
be made. To increase the Tong pressure, loosen the front Hex Jam Nut (part #10).
The more the front Hex Jam Nut is loosened, the greater the pressure on the Tong Tips
(part #48) when the Operating Lever (part #5) is closed. Next, turn the rear Hex Jam
Nut toward the Top Tong Clamp (part #13) to lock the desired pressure in position. (See
Figures a, F, and assy. diagram.)
5.
6.
7.
If the Tongs (parts #46, #47) pressure is too strong, the weld nugget will dimple,
and material will splash out around the nugget area. To decrease the Tong pressure,
loosen the rear Hex Jam Nut (part #10) and turn the front Hex Jam Nut (part #10) to-
ward the Top Tong Clamp (part #13) to lock the desired pressure in position. (See Fig-
ures a, F, and assy. diagram.)
The farther down the Cap Screw (part #3) is turned, the farther down the Operating Le-
ver (part #5) will close. Adjusting the Cap Screw will determine if the Tongs (parts #46,
#47) clamp down on the material, or just pull up tight. Adjust the Cap Screw to allow the
Operating Lever to be raised easily after the weld has been completed. (See Figures
a, F, and assy. diagram.)
To adjust the pressure required to push down the Operating Lever (part #5), turn the
Hex Nut (part #20) located on each side of the Front Housing (part #28) clockwise or
counterclockwise. (See Figures a, F, and assy. diagram.)
REV 10g
SKU 45689
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OPERATING
LEVER (#5)
REAR HEX JAM
NUT (#10)
CAP SCREW
(#3)
FRONT HEX JAM
NUT (#10)
UPPER TONG
(#46)
HEX NUT (#20)
TONG
TIP
(#48)
LOWER TONG (#47)
Figure F
To Use The Power Switch:
1.
2.
The Power Switch (part #25) allows electrical current to the Spot Welder to be turned
“ON” and “OFF”. (See Figure d, and assy. diagram.)
Turn the Power Switch (part #25) sideways in either direction to start the
electrical
current . Release the Power Switch to stop the electrical current.
To Use The Operating Lever:
1.
caution: never touch the upper and lower tongs (parts #46, #47) when weld-
ing a workpiece. Allow the Tong Tips (part #48) and the workpiece to cool before han-
dling. (See Figures a, B, e, and assy. diagram.)
2.
3.
The Operating Lever (part #5) allows you to open and close the Upper and Lower Tongs
(parts #46, #47). (See Figures a, F, and assy. diagram.)
Close the Operating Lever (part #5) during the welding process to compress the work-
pieces between the Tong Tips (part #48). Open the Operating Lever after the spark ap-
pears and each weld is made to release the workpieces. (See Figures B, a, F, and
assy. diagram.)
SKU 45689
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trouBle Shooting guide
inSpection, Maintenance, and cleaning
1.
2.
Caution: Always disconnect the Spot Welder from its electrical power supply source
before performing any inspection, maintenance, or cleaning.
Before each use, inspect the general condition of the Spot Welder. Inspect switch,
power plug and cord assembly, and extension cord (if used) for damage. Check for
loose screws, misalignment, binding of moving parts, broken parts and any other condi-
tion that may affect its safe operation. If abnormal noise or vibration occurs, disconnect
the Spot Welder from its electrical supply source immediately and have the problem cor-
rected before further use. Do not use damaged equipment.
SKU 45689
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3.
Do not use solvents to wipe off the Spot Welder, as damage may result. If necessary,
wipe with a damp cloth. You may use a mild detergent.
4.
5.
Once clean, lubricate all moving parts with a light oil.
When storing, keep the Spot Welder in a box or covered with a cloth cover.
pleaSe read the FolloWing careFullY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS DIAGRAM
IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER NOR
DISTRIBUTOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE
BUYER THAT HE OR SHE IS QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT
OR THAT HE OR SHE IS QUALIFIED TO REPLACE ANY PARTS OF THE PRODUCT. IN
FACT, THE MANUFACTURER AND/OR DISTRIBUTOR EXPRESSLY STATES THAT ALL
REPAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND
LICENSED TECHNICIANS AND NOT BY THE BUYER. THE BUYER ASSUMES ALL RISK
AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL PRODUCT OR
REPLACEMENT PARTS THERETO, OR ARISING OUT OF HIS OR HER INSTALLATION OF
REPLACEMENT PARTS THERETO.
SKU 45689
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partS liSt
part #
description
Qty.
1
2
3
4
5
6
7
8
9
Handle, Carrying
Nut
1
1
7
1
1
1
2
1
1
2
2
1
1
1
1
8
1
2
1
3
1
1
4
1
1
1
1
1
1
2
1
1
1
4
1
1
1
4
1
1
1
1
1
1
1
4
1
3
2
1
1
2
1
Screw Cap Stl Sch .250-20 x 1.250
Wiring Harness, Switch
Lever, Operating
Pin, Spring CS .312 x 1.750
Link, Tgl Connecting
Pin, Spring CS .312 x 1.250
Bolt, Pressure Adjustment
Nut, Stl Hex Jam .437-20
Screw, Cap Stl Sch .250-20 x 1.500
Holder, Tong Top
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
25A
25B
25C
25D
26
27
28
29
30
31
32
33
34
35
36
37
Clamp, Tong Top
Braid, Tong Set of Four
Clamp, Connecting Top Tong Braid
Screw, m6 x 1.0 x 15 Soc. Hex Head
Handle, Wood
Bracket, Mtg Handle
Bolt, Crg Stl .250-20 x 4.500
Nut, Al Hex .375-24
Stud, Stl .375-24 x 3.750
Guard, Spatter
Screw 10-32 x .625 Hex Head Slt Stl
Insulation, Switch
Power Switch (consisting of A, B, C, D below):
Contact, Assembly Switch
Contact, Switch
Toggle, Switch
Base
Insulator, Plug Sec Scr
Pin, Spring .375-3.00
Housing, Front
Nameplate (order by model and serial number)
Screw, Drive U 2 x 3/16”
Retainer, Clamp Tong
Insulation, Bottom Clamp
Insulator, Tong
Screw, Cap Stl Sch .250-20 x .750
Clamp, Lower Tong
Clamp, Threaded Connecting Tong Braid (included w/Part #5)
Transformer, Power Main
Label, Warning General Precautionary
Splice, Butt 16-14 Wire
Screw, 10-32 x .250 Hex Head Slt Stl
Cover
38
39
40
41
43
44
45
46
47
48
49
Nut, Stl Slflkg Hex Mscr 10-32
Cable, Power 10 Ft. 16 Gauge 1/C (Models w/out Timer)
Tubing, Gl Acrylic No. 7 x 2.500
Screw, 10-32 x .500 Hex Head Slt Stl
Upper Tong
Lower Tong
Tong Tip
Lock Washer
REV 04c, 08c
SKU 45689
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aSSeMBlY diagraM
note: Some parts are listed and shown for illustration purposes only, and are not available
individually as replacement parts.
SKU 45689
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liMited 1 Year / 90 daY WarrantY
Harbor Freight Tools Co. makes every effort to assure that its products meet high qual-
ity and durability standards, and warrants to the original purchaser that for a period of ninety
days from date of purchase that the torch, liner, wire feed mechanism (if applicable), welding
clamps, electrode holders, cables and accessories packed with the welder are free of defects
in materials and workmanship. this limited 90 day/1 Year Warranty shall not apply to con-
sumable parts such as tips, welding wire, and gas nozzles. Harbor Freight Tools also war-
rants to the original purchaser, for a period of one year from date of purchase, that the trans-
former and rectifier are free from defects in materials and workmanship (90 days if used by a
professional contractor or if used as rental equipment). This warranty does not apply to dam-
age due directly or indirectly to misuse, abuse, negligence or accidents, repairs or alterations
outside our facilities, normal wear and tear, or to lack of maintenance. We shall in no event be
liable for death, injuries to persons or property, or for incidental, contingent, special or conse-
quential damages arising from the use of our product. Some states do not allow the exclusion
or limitation of incidental or consequential damages, so the above limitation of exclusion may
not apply to you. THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES,
EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FIT-
NESS.
To take advantage of this warranty, the product or part must be returned to us with
transportation charges prepaid. Proof of purchase date and an explanation of the complaint
must accompany the merchandise. If our inspection verifies the defect, we will either repair or
replace the product at our election or we may elect to refund the purchase price if we cannot
readily and quickly provide you with a replacement. We will return repaired products at our ex-
pense, but if we determine there is no defect, or that the defect resulted from causes not within
the scope of our warranty, then you must bear the cost of returning the product.
This warranty gives you specific legal rights and you may also have other rights which
vary from state to state.
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • (800) 444-3353
SKU 45689
For technical questions, please call 1-800-444-3353.
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