Cornwell Tools MMWC3 User manual

MMWC3 WELDING CART
& CABINET
OWNER’S MANUAL
11/2020
WARNING:
Read carefully and understand all ASSEMBLY AND OPERATION
INSTRUCTIONS before operating. Failure to follow the safety rules and other
basic safety precautions may result in serious personal injury.

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WARRANTY
Cornwell Quality Tools
EFFECTIVE JANUARY 1, 2013
LIMITED WARRANTY
This warranty applies to the original purchaser and is subject to the terms and conditions listed below. This Limited Warranty is for
new equipment sold after the above date, providing coverage for defects in material and workmanship at the time it is shipped from
the factory.
Limited to the warranty periods below, Cornwell Quality Tools will repair or replace the item under warranty that fails due to defects
in material and workmanship. Cornwell Quality Tools must be notified within 30 days of the failure, to provide instructions on how to
proceed with the repair of your welding cart and warranty claim processing. Warranty period begins at the time the welder is
purchased from and Authorized Reseller of Cornwell Quality Tools. products. Keep your receipt as proof of purchase.
Warranty Periods
90 Days Warranty on Cornwell Branded welding carts
Limited Warranty
All parts for Cornwell branded welding carts. This warranty covers the absence of, or defective parts.
Voiding Warranty
Warranty does not apply to the following: shipping damage, misuse and abuse of the unit and alteration of the unit in any way.
Warranty Claim
This is a parts and labor warranty. Do not return your unit to the retailer you purchased it from. Retain your receipt in the case
a warranty claim is needed. No warranty will be provided without the original receipt from an authorized reseller of Cornwell Quality
tools Products. To make a warranty claim, call our welder help line at 888-762-4045, M-F 8:00 am to 5:00 PM Central time.

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GENERAL SAFETY RULES
WARNING: Read and understand all instructions. Failure to follow all instructions listed
below may result in serious injury.
CAUTION: Do not allow persons to operate or assemble this Flux Core 125 until they
have read this manual and have developed a thorough understanding of how the Flux Core
125 works.
WARNING: The warnings, cautions, and instructions discussed in this instruction
manual cannot cover all possible conditions or situations that could occur. It must be
understood by the operator that common sense and caution are factors which cannot be built into
this product but must be supplied by the operator.
SAVE THESE INSTRUCTIONS
IMPORTANT SAFETY CONSIDERATIONS
1.1 Your Welding Environment
-Keep the environment you will be welding in free from flammable materials.
-Always keep a fire extinguisher accessible to your welding environment.
-Always have a qualified person install and operate this equipment.
-Make sure the area is clean, dry, and ventilated. Do not operate the welder in humid, wet, or poorly
ventilated areas.
-Always have your welder maintained by a qualified technician in accordance with local, state, and
national codes.
-Always be aware of your work environment. Be sure to keep other people, especially children,
away from you while welding.
-Keep harmful arc rays shielded from the view of others.
-Mount the welder on a secure bench or cart that will keep the welder secure and prevent it from
tipping over or falling.
1.2 Your Welder’s Condition
-Check ground cable, power cord and welding cable to be sure the insulation is not damaged.
Always replace or repair damaged components before using the welder.
-Check all components to ensure they are clean and in good operating condition before use.
1.3 Use of Your Welder
Do not operate the welder if the output cable, electrode, torch, wire, or wire feed system is wet. Do
not immerse them in water. These components and the welder must be completely dry before
attempting to use them.
-Follow the instructions in this manual.
-Keep welder in the off position when not in use.
-Connect ground lead as close to the area being welded as possible to ensure a good ground.

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-Do not allow any body part to come in contact with the welding wire if you are in contact with the
material being welded, ground or electrode from another welder.
-Do not weld if you are in an awkward position. Always have a secure stance while welding to
prevent accidents. Wear a safety harness if working above ground.
-Do not drape cables over or around your body.
-Wear a full coverage helmet with appropriate shade (see ANSI Z87.1 safety standard) and safety
glasses while welding.
-Wear proper gloves and protective clothing to prevent your skin from being exposed to hot metals,
UV, and IR rays.
-Do not overuse or overheat your welder. Allow proper cooling time between duty cycles.
-Keep hands and fingers away from moving parts and stay away from the drive rolls.
-Do not point MIG gun at any body part of yourself or anyone else.
-Always use this welder in the rated duty cycle to prevent excessive heat and failure.
1.4 Specific Areas of Danger, Caution or Warning
Electrical Shock
Electric arc welders can produce a shock that can cause injury or death. Touching
electrically live parts can cause fatal shocks and severe burns. While welding, all metal
components connected to the wire are electrically hot. Poor ground connections are a hazard, so
secure the ground lead before welding.
-Wear dry protective apparel: coat, shirt, gloves, and insulated footwear.
-Insulate yourself from the work piece. Avoid contacting the work piece or ground.
- Do not attempt to repair or maintain the welder while the power is on.
-Inspect all cables and cords for any exposed wire and replace immediately if found.
-Use only recommended replacement cables and cords.
-Always attach ground clamp to the work piece or worktable as close to the weld area as possible.
-Do not touch the welding wire and the ground or grounded work piece at the same time.
-Do not use a welder to thaw frozen pipes.
Fumes and Gases
-Fumes emitted from the welding process displace clean air and can result in injury or
death.
-Do not breathe in fumes emitted by the welding process. Make sure your breathing air is clean and
safe.
-Work only in a well-ventilated area or use a ventilation device to remove welding fumes from the
environment where you will be working.
-Do not weld on coated materials (galvanized, cadmium plated or containing zinc, mercury, or
barium). They will emit harmful fumes that are dangerous to breathe. If necessary, use a ventilator,
respirator with air supply or remove the coating from the material in the weld area.
-The fumes emitted from some metals when heated are extremely toxic. Refer to the material safety
data sheet for the manufacturer’s instructions.
-Do not weld near materials that will emit toxic fumes when heated. Vapors from cleaners, sprays
and degreasers can be highly toxic when heated.
UV and IR Arc Rays
The welding arc produces ultraviolet (UV) and infrared (IR) rays that can cause injury to

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your eyes and skin. Do not look at the welding arc without proper eye protection.
-Always use a helmet that covers your full face from the neck to top of head and to the back of each
ear.
-Use a lens that meets ANSI standards and safety glasses. For welders under 160 Amps output,
use a shade 10 lens; for above 160 Amps, use a shade 12. Refer to the ANSI standard Z87.1 for
more information.
-Cover all bare skin areas exposed to the arc with protective clothing and shoes. Flame-retardant
cloth or leather shirts, coats, pants, or coveralls are available for protection.
-Use screens or other barriers to protect other people from the arc rays emitted from your welding.
-Warn people in your welding area when you are going to strike an arc so they can protect
themselves.
Fire Hazards
Do not weld on containers or pipes that contain or have had flammable, gaseous or liquid
combustibles in them. Welding creates sparks and heat that can ignite flammable and
explosive materials.
-Do not operate any electric arc welder in areas where flammable or explosive materials are
present.
-Remove all flammable materials within 35 feet of the welding arc. If removal is not possible, tightly
cover them with fireproof covers.
-Take precautions to ensure that flying sparks do not cause fires or explosions in hidden areas,
cracks, or areas you cannot see.
-Keep a fire extinguisher close in the case of fire.
-Wear garments that are oil-free with no pockets or cuffs that will collect sparks.
-Do not have on your person any items that are combustible, such as lighters or matches.
-Keep work lead connected as close to the weld area as possible to prevent any unknown,
unintended paths of electrical current from causing electrical shock and fire hazards.
-To prevent any unintended arcs, cut wire back to ¼" stick out after welding.
Hot Materials
Welded materials are hot and can cause severe burns if handled improperly.
-Do not touch welded materials with bare hands.
-Do not touch MIG gun nozzle after welding until it has had time to cool down.
Sparks/Flying Debris
Welding creates hot sparks that can cause injury. Chipping slag off welds creates flying
debris.
-Always wear protective apparel: ANSI-approved safety glasses or shield, welder’s hat and ear
plugs to keep sparks out of ears and hair.

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Electromagnetic Field
-Electromagnetic fields can interfere with various electrical and electronic devices such as
pacemakers.
-Consult your doctor before using any electric arc welder or cutting device
-Keep people with pacemakers away from your welding area when welding.
-Do not wrap cable around your body while welding.
-Wrap MIG gun and ground cable together whenever possible.
-Keep MIG gun and ground cables on the same side of your body.
Shielding Gas Cylinders Can Explode
High pressure cylinders can explode if damaged, so treat them carefully.
-Never expose cylinders to high heat, sparks, open flames, mechanical shocks, or arcs.
-Do not touch cylinder with MIG gun.
-Do not weld on the cylinder
-Always secure cylinder upright to a cart or stationary object.
-Keep cylinders away from welding or electrical circuits.
-Use the proper regulators, gas hose and fittings for the specific application.
-Do not look into the valve when opening it.
-Use protective cylinder cap whenever possible
1.5 Proper Care, Maintenance and Repair
-Always have power disconnected when working on internal components.
- Do not touch or handle PC board without being properly grounded with a wrist strap. Put PC board
in static proof bag to move or ship.
-Do not put hands or fingers near moving parts such as drive rolls of fan
USE AND CARE
•Do not modify this unit in any way. Unauthorized modification may impair the function and/or
safety and could affect the life of the equipment. There are specific applications for which this
unit was designed.
•Always check of damaged or worn out parts before using this unit. Broken parts will affect
the operation. Replace or repair damaged or worn parts immediately.
•Store idle. When this unit is not in use, store it in a secure place out of the reach of children.
Inspect it for good working condition prior to storage and before re-use.
SPECIFICATIONS
Item
Description
Overall Dimensions
32-1/2 in. x 19 in. x 34-1/4 in.
Top Shelf Space
13-1/4 in. x 19 in.
Bottom Shelf Space
13-3/4 in. x 19-3/4 in. x 16-1/2 in. Clearance
Product Weight
45 lbs.
Load Capacity
100 lbs.

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DESCRIPTION
The Cornwell Quality Tools MMWC3 Cart & Cabinet is a great way to organize your welding
tools. The top shelf has ample space for most brands of welders. The shelf is 34 inches off the
floor putting your welder at a good working height. The slight backwards slope gives the
operator easy view of the welder controls. A reversible tow handle allows you to position it best
for your welder. The tall second shelf is well positioned for that second welding tool. Maybe it is
a plasma cutter or a small stick welder. This cart allows you to store both welders on one cart.
The lockable cabinet at the bottom of the cart gives you secure storage for your welding helmet
and other welding accessories.
6 Inch
Wheels
2 Inch
Caster
13-3/4” x 18-3/4”
Top Shelf
Locking
Cabinet Door
Cylinder Rack With Two
Securement Chains Holds One
7-1/2” Diameter Cylinder
13-1/2” x 19-1/2” x 12”
Storage Cabinet
13-3/4” x 19-3/4” Shelf
With 16-1/2” Clearance
Cable
Wraps
Reversible
Tow Handle

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ASSEMBLY
For Assistance with component identification, please refer to the parts drawing.
1. Place the base panel (Item 13) on a sturdy surface with the side lips facing up. Place the Vertical
Cylinder Securement Panel (Item 25) inside the base panel and align the mounting holes in the base
panel with the mounting holes in the Vertical Cylinder Securement Panel.
2. Place the Left Side Cabinet panel (Item 6) into the assembly and align mounting holes with the
Vertical Cylinder Securement Panel (Item 25). Use two supplied 10 MM bolts to secure the Left Side
Cabinet Panel to the Vertical Cylinder Securement Panel and the base panel.
3. Align the Left Side Vertical Panel (Item 3) with the mounting holes in the front of the Left Side
Cabinet Panel (Item 6) and the base panel (Item 13). Use two of the supplied 10 MM bolts to secure
the Left Side Vertical Panel (Item 3) to the Left Side Cabinet Panel (Item 6) and the base panel (Item
13).
Align Mounting
Holes
Align Mounting
Holes

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4. Repeat Steps 2 and three to secure the Right-Side Cabinet Panel (Item 22) and the Right-Side
Vertical Panel (Item 24) to the assembly.
5. Place the Right-Side Cabinet panel (Item 22) into the assembly and align mounting holes with the
Vertical Cylinder Securement Panel (Item 25). Use two supplied 10 MM bolts to secure the
Right-Side Cabinet Panel (Item 22) to the Vertical Cylinder Securement Panel (Item 25) and the base
panel (Item 13).
6. Find the long slots at the back of the base unit (Item 13). Insert the Axle Clips (Item 18) into the slots
from the top, then slide the axle (Item 17) through the large hole in the clip. Repeat for both clips.
7. Slide a wheel (Item 19) on each side.
8. Secure each wheel with a flat washer (Item 20) and cotter pin (Item 21).

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9. Find the left side panel of the cabinet (Item 6). Align the pre-drilled holes in the lip of the left side
panel (Item 6) with the pre-drilled holes in the base of the cabinet (Item 13). The holes in the front of
the cabinet base are where the casters will attach. First secure the left side panel to the base using 4
of the supplied screws. Then repeat for the right-side panel (Item 22) of the cabinet.
10. Take a supplied 10 mm bolt and push it through the pre-drilled holes in the lip of the left side panel
(Item 6) and through the pre-drilled holes in the base of the cabinet (Item 13) and then through the
pre-drilled holes in the flange of the caster (Item 12). Secure with a 10 mm nut. Repeat for all 4
mounting holes for this caster (Item 12). Then repeat for the right-side caster (Item 12).
11. Place the middle shelf (Item 5) on top of the side panels (Items 6 & 22). Secure with supplied screws.
12. Using the supplied Philips head bolt, slide on a flat washer and insert it into the pre-drilled holes in
the right side of the plastic door hinge (Item 7). Then insert this assembly into the pre-drilled holes in
the front of the cabinet (Item 8). Add a flat washer, lock washer, and nut onto the back to secure.
Repeat for the other right-side hole in that hinge (Item 7). Then repeat for the other hinge.
13. Using the Phillips head bolt, add a flat washer and slide it through the pre-drilled holes in the left side
of the hinge (Item 7) and through the pre-drilled holes on the front door (Item 8). Add a flat washer,
lock washer, and nut onto the back to secure. Repeat for the other left side hole in that hinge (Item
7). Then repeat for the other hinge.
14. Find the left side vertical panel (Item 3). With the lips out and the wide end to the bottom, align the
bottom two pre-drilled holes in the vertical panel (Item 3) with the threaded holes in the cabinet base
(Item 13). They are located right above the left side caster. Secure with a 10 mm bolt in both
mounting holes. Do not completely tighten these bolts at this time.
15. Going up the left side vertical panel (Item 3), align the next two pre-drilled holes with the pre-drilled
holes in the lip of the middle shelf (Item 5). Secure these mounting holes with a 10 mm bolt and a 10
mm nut. Then tighten the bolts in the previous step.
16. Repeat the last two steps to mount the right-side vertical panel (Item 24).
17. Install the vertical cylinder securement panel (Item 25) on the back of the cabinet box (Items 6 & 22).
This panel will slide between the cabinet box (Items 6 & 22) and the lip of the bottom panel (Item 13).
Align the pre-drilled holes in the left side of the vertical cylinder securement panel (Item 25) and the
pre-drilled holes in the lip of the bottom panel (Item 13) with the threaded holes in the cabinet box
(Items 6 & 22). You may need to use a small screwdriver to help align all three holes. Slide in a 10
mm bolt and leave it slightly loose at this point. Repeat for the mounting holes on the right side of the
vertical cylinder securement panel (Item 25). Then tighten all four bolts.

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ASSEMBLY (Continued)
18. Going up the vertical cylinder securement panel (Item 25), align the pre-drilled holes in the left side
with the pre-drilled holes in the lip of the middle shelf (Item 5). Secure each mounting hole with a 10
mm bolt and a nut. Repeat for both holes and then again for the one on the back. Then repeat for all
three mounting holes on the right side of the vertical cylinder securement panel (Item 25).
19. Align the pre-drilled holes on the back of the top shelf lip (Item 1) with the pre-drilled holes in the
vertical cylinder securement panel (Item 25). There is one on the back and one on the side for both
the right and left sides (Items 1 & 25). Secure with a 10 mm bolt and a nut. Leave these slightly loose
at this time.
20. Align the pre-drilled holes on the front of the top shelf lip (Item 1) with the pre-drilled holes in the front
vertical panels (Items 3 & 24). Secure with a 10 mm bolt and a nut. Then tighten all the bolts from the
previous step.
NOTE: The tow handle (Item 2) is reversible. The orientation of the handle will vary depending on the
equipment and operator preference.
21. Using the longer 10 mm bolts, slide on a flat washer and slide it through one of the pre-drilled holes
on the left side of the handle (Item 2). Then slide it through the matching pre-drilled hole on the left
lip of the top shelf (Item 1). Add a flat washer, lock washer, and secure it with a nut. Leave this nut
slightly loose at this time. Repeat for both pre-drilled holes in the left side of the handle (Item 2).
Then repeat for the two mounting holes in the right side of the panel Items 2 & 1). Then tighten all the
nuts holding the handle.
22. You will notice four pre-drilled holes remain in the front vertical panels (Items 3 & 24) and on each
side of the vertical cylinder securement panel (Item 25). These mounting holes are for cable wraps
(Item 4). For the top set of holes, the cable wrap (Item 4) should be mounted with the opening up.
For the bottom set of holes, the cable wrap (Item 4) should be mounted with the opening down.
Using a 10 mm nut, slide it through the pre-drilled holes in the cable wrap (Item 4) and then through
the pre-drilled hole in the vertical panel(s) (Items 3 & 24). Secure with a nut. Repeat this for all
mounting holes on all eight cable wraps (Item 4) on both side of the cart (Items 3 & 24, Item 25
respectively).
23. Find the 3/4-inch holes in the back of the vertical cylinder securement panel (Item 25). Place one end
of the securement chain (Item 23) in one hole and slide a link down into the bottom groove. Then
wrap the chain (Item 23) around the cylinder you are securing and place it in the other 3/4-inch hole
on the other side of the vertical cylinder securement panel (Item 25).

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DIAGRAM & PARTS LIST

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Reference #
Part#
Description
Qty.
1
105100109
TOP SHELF
1
2
105100110
HANDLE
1
3
105100111
LEFT SIDE VERTICAL PANEL
1
4
105100112
CABLE WRAP
8
5
105100113
MIDDLE SHELF
1
6
105100114
LEFT SIDE CABINET PANEL
1
7
105100115
PLASTIC HINGE
2
8
145100004
DOOR
1
9
105100027
LOCK SET
1
10
105100026
DOOR HANDLE
1
11
105100116
PHILLIPS HEAD BOLT M5*16
8
11.1
105100046
FLAT WASHER M5
16
11.2
105100045
LOCK WASHER M5
8
11.3
105100053
HEX NUT M5
8
12
105100009
CASTER 65 MM × 27 MM
2
13
105100117
BASE PANEL
1
14
105100029
SCREW 4.2 MM X 9.5 MM
18
15
105100118
10 MM BOLT LONG M6*30
4
15.1
105100046
FLAT WASHER M6
8
15.2
105100045
LOCK WASHER M6
4
15.3
105100053
HEX NUT M6
4
16
105100119
10 MM BOLT SHORT M6*12
50
17
105100120
AXLE
1
18
105100121
AXLE CLIP
2
19
105100003
WHEEL 150 MM ×35 MM
2
20
105100002
FLAT WASHER M12
4
21
105100001
COTTER PIN 2.5 MM X 25 MM
2
22
105100122
RIGHT SIDE CABINET PANEL
1
23
105100007
CYLINDER SECUREMENT CHAIN 4 MM
2
24
105100123
RIGHT SIDE VERTICAL PANEL
1
25
105100124
VERTICAL CYLINDER SECURMENT PANEL
1
145100005
OWNER’S MANUAL
1
Cornwell Quality Tools TECHNICAL HELP STICKER
1
For replacement parts or technical questions, please contact our welder help line at
888-762-4045

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CORNWELL QUALITY TOOLS COMPANY
667 SEVILLE RD
WADSWORTH OH 44281-1077
Made in China