Ironton 37560 User manual

Thank you very much for choosing an Ironton Product! For future reference, please complete the
owner’s record below:
Model: _______________ Purchase Date: _______________
Save the receipt, warranty and these instructions. It is important that you read the entire manual
to become familiar with this product before you begin using it.
This trailer is designed for certain applications only. The distributor cannot be responsible for
issues arising from modification. We strongly recommend this trailer is not modified and/or used
for any application other than that for which it was designed. If you have any questions relative to
a particular application, DO NOT use the trailer until you have first contacted distributor to
determine if it can or should be performed on the product.
For technical questions, please call 1-800-222-5381.
WARNING: Read carefully and understand all INSTRUCTIONS before operating.
Failure to follow the safety rules and other basic safety precautions may result in serious
personal injury.
Save these instructions in a safe place and on hand so that they can be read when required.
Keep these instructions to assist in future servicing.
TECHNICAL SPECIFICATIONS
GENERAL SAFETY REGULATIONS
WARNING: Read and understand all instructions. . Failure to follow all instructions
listed below may result in electric shock, fire and/or serious injury.
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 that cannot be built
into this product, but must be supplied by the operator.
• Keep the work area clean and dry. Damp or wet work areas can result in injury.
• Keep children away from work area. Do not allow children to handle this product.
• Always wear ANSI-approved safety glasses and heavy-duty work gloves during assembly
and use. Do not wear loose clothing or jewelry which can get caught in moving parts.
• 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 damaged or worn parts immediately.
• Do not overreach. Keep proper footing and balance at all times to prevent tripping, falling,
back injury, etc.
• DO NOT use this trailer when tired or distracted.
• Industrial applications must follow OSHA requirements.
40IN. X 48IN. UTILITY TRAILER
OWNER’S MANUAL
40IN. X 48IN. UTILITY TRAILER
OWNER’S MANUAL
Item#s 37560
1 of 10
ITEM
Tires
Wheel
Bed Dimensions
Ball/Coupler Size
ITEM
Load Capacity
GAWR
GVWR
DESCRIPTION
4.80-12 Tubeless
4 Bolt Demountable
40” x 48”
1-7/8 Inch
DESCRIPTION
1,060 lbs. max
1,200 lbs. with 4.80-12
Tires at 60 PSI Cold
1,200 lbs.
WARNING: Read carefully and understand all INSTRUCTIONS
before operating. Failure to follow the safety rules and other basic
safety precautions may resultin serious personal injury.

SPECIFIC OPERATION WARNINGS
• Before each use, always examine the trailer for proper tire condition and air pressure, damaged
Tail Lights, damaged Side Running Lights, loose bolts and nuts, structural cracks, bends and
any other condition that may affect its safe operation. Do not use the Trailer even if minor
damage appears.
•
Before each use, always attach the Safety Chains of the trailer to the towing vehicle. Make sure
the Safety Chains are attached to the towing vehicle with the equal length at each side. Do
not allow the Safety Chains to drag on the ground.
• Always check to make sure the payload being transported properly and safely secured in the
trailer. Load the Trailer evenly from side to side with 60% of the load forward of the Axle.
• Make sure the towing vehicle is capable of towing this trailer and its payload. Make sure the
hitch on the towing vehicle is capable of towing the Trailer and its payload. The towing
capacity of the hitch is typically stamped on the hitch drawbar.
• Make sure the hitch coupler and the vehicle’s Ball Hitch (not included) are of equal mating
size (1-7/8in.) and are rated equal to or greater than the weight of the trailer and its payload.
• Do not exceed 45 miles per hour when towing the trailer. Excess speed is a major cause of
vehicle-trailer accidents.
• The Tail Light Bulbs supplied with this trailer are for a 12 Volt DC electrical system only. Do
not attempt to power the Light Bulbs with any other type or voltage electrical current.
• Whenever possible, park the trailers on a flat, level, paved surface and chock both tires to
keep the trailer from accidently moving.
• Before attempting to fold up the trailer, make sure it is on a flat, level, solid surface and chock
both tires.
• Never attempt to fold up the trailer without assistance.
• DO NOT exceed the 870 pound weight capacity.
• DO NOT allow anyone to ride in the towed vehicle or on the trailer.
• The coupler must be properly secured to the hitch ball. After assembly and attachment, pull
up and down on the hitch coupler to make sure the hitch ball is snug in the hitch coupler. If
the coupler is not secured properly, it could come loose while the trailer is in motion, causing
property damage, serious personal injury or even death.
• Make wide turns when towing a loaded trailer, avoiding both sharp turns and U-turns. Turning
too sharply can cause damage to the trailer and/or the tow vehicle.
UNPACKING
When unpacking, check to make sure all the parts shown on the Parts List are included. If any
parts are missing or broken, please call the distributor at 1-800-222-5381.
TRAILER ASSEMBLY INSTRUCTIONS
STEP 1:
1. Lay out three cross members (#4) to right and left side rail (#5, #5A) shown in figure below.
Notice the “Front” cross member is reversed.
2. Assemble (#4, #5, #5A) by using M10 x 20mm Hex Bolts and nuts, with flat flanges of cross
members positioned as shown in figure.
3. Do not tighten nuts until all bolts are positioned in place.
STEP 2:
1. Turn the trailer assembly upside down.
2. Bolt tow bar (#6) with hex bolts, and nuts (#1, #3). Notice the bolt direction as shown in figure
below.
3. Bolt front spring hangers (#7) to side rails (#5, # 5A) with hex bolts and nuts (#1, #3). Attach
other spring hangers with one bolt to the rear end, tighten nuts and attach spring slide plates
(#8) through other hole in spring hanger, as shown in figure below.
40IN. X 48IN. UTILITY TRAILER
OWNER’S MANUAL
40IN. X 48IN. UTILITY TRAILER
OWNER’S MANUAL
2 of 10 3 of 10
PART
1
3
4
5
5A
QTY
12
12
3
1
1
PARTS NEEDED
DESCRIPTION
M10x20mm Hex Bolts
M10 Nylon nuts
Cross Members
Left Side Rail
Right Side Rail
PART
1
3
6
7
8
QTY
12
12
1
4
2
PARTS NEEDED
DESCRIPTION
M10x20mm Hex Bolts
M10 Nylon Nuts
Tow bar
Spring Hangers
Spring Slide Plates

STEP 3:
1. Put the springs (#9) on the spring hangers (#7) with spring eyes forward. Secure with M14 x
80mm bolt (#10) by going through the spring hangers, lock it with M14 nuts (#11). Then push
a cotter pin (#33) through the hole in the end of the bolt and spread it.
2. Place axle (#12) on top of spring (#9). Place spring plate (#14) under spring; using M10 U-Bolt
(#13) pass through axle, spring, and spring plate, then lock with M10 nuts (#3).
3. Repeat above steps for the other side of trailer.
STEP 4:
1. Remove dust cap (#22), take out cotter pin (#21), carefully slide hub assembly onto axle.
Place flat washer (#19) on axle, apply and tighten castle nut (#20) snuggly, back it off slightly
until wheel turns freely. Insert and spread cotter pin (#21). Fill dust cap (#22) 1/4" full of
Automotive Grease and replace firmly on hub.
2. Put tire/wheel assembly (#16) on hub dry. Then lock with 4 lug nuts (#17). Tighten with socket
or lug wrench to 90 ft-lbs.
NOTE: Air value should be on outside of rim. Be sure that axle is perpendicular to side rails and
springs are parallel to side rails.
40IN. X 48IN. UTILITY TRAILER
OWNER’S MANUAL
4 of 10
PART
3
9
10
11
12
13
14
33
QTY
8
2
4
4
1
4
2
4
PARTS NEEDED
DESCRIPTION
M10 Nylon Nuts
Springs
M14 x 80 Bolts
M14 Nuts
Axle
M10 U-Bolts
Spring Plates
3mm Cotter Pins
PART
15
16
17
18
19
20
21
22
35
QTY
2
2
8
4
2
2
2
2
2
PARTS NEEDED
DESCRIPTION
Hub Assembly
Tire/Wheel Assembly
Lug Nuts
Bearings
3/4" Flat Washers
Castle Nuts
Cotter Pins
Dust Caps
Grease Fitting
STEP 5:
1. Turn trailer assembly over, right-side-up.
2. Bolt coupler (#23) to tow bar (#6) with hex bolts and nuts, (#24, 3), attach safety chain (#25),
then lock it.
NOTE: Make sure the safety chain is the same length on each side.
3. Attach tail light brackets (#27) with bolts, and nuts (#1, 3) as shown in figure. Install license
plate bracket (#28) and left tail light (#29) (with clear lens facing down) with nuts. Install right
tail light (#29A).
4. Remove lens of side running lights (#30), feed the wire through the hole in the center of the
light and the center hole in the frame and attach to frame with self-tapping screws (#31).
5. Bolt fenders (#34) to side rails by using hex bolts (#1), lock nuts (#3).
40IN. X 48IN. UTILITY TRAILER
OWNER’S MANUAL
5 of 10
PART
1
3
23
24
25
27
28
QTY
8
10
1
2
1
2
1
PARTS NEEDED
DESCRIPTION
M10 x 20mm Bolts
Nylon Nuts
Coupler
M10 x 90mm Bolts
Safety Chain
Tail Light Bracket
License Plate Bracket
PART
29
29A
30
31
34
36
37
QTY
1
1
2
4
2
1
1
DESCRIPTION
Left Tail Light
Right Tail Light
Side Running Lights
Self Tapping Screw
Fenders
3mm R-Pin
Safety Pin

6 of 10 7 of 10
40IN. X 48IN. UTILITY TRAILER
OWNER’S MANUAL
TRAILER LIGHT AND WIRE ASSEMBLY INSTRUCTIONS
WIRING DIAGRAM AND INSTRUCTION
1.
Check alignment of all parts and install the 4-wire vehicle connector in the trunk area of your car.
2. Locate the connector plug near the hitch ball and lay out wires.
3. Connect the white wire to the frame or body of the car;
4.
Connect the brown wire to the tail light by stripping, wrapping, and taping connector; similarly
connect the yellow wire to the left signal and stop light wire and the green wire to the right
signal and stop light wire. NOTE: Some foreign vehicles may require an adapter to convert
their 5-wire system to the wire vehicle connector.
1. Attach white ground wire at plug end of wiring harness to the small hole in tow bar with
self-tapping screw.
2. Leave about 18” of wire beyond the coupler and lay out wire on the inside of tow bar and
front cross-member as shown in the diagram. From here, split the yellow/brown and
green/brown wires. Push on the wire clips. See Figure A above.
3. Refer to Figures D and E above. Connect the wire lead from the side running lights to the
brown wire on each side with the wire connectors. Use pliers to squeeze the connector
closed.
4. Push on wire clips to hold wires down the side rails of the trailer.
5. Cut yellow/brown and green/brown wires to appropriate lengths and strip ends of wire 3/4".
6. Refer to Figures B and C above. Make tail light connections as per color code:
Left Side
Yellow – yellow wire
Brown – Two brown wires
Right Side
Green – green wire
Brown – Two brown wires
40IN. X 48IN. UTILITY TRAILER
OWNER’S MANUAL
SAFE USE AND OPERATION RULES
1. TOWING VEHICLE
• Make sure vehicle is capable of towing the load.
• Excess speed is the second highest cause of car-trailer accidents. Recommended maximum
speed for all passenger cars towing trailers is 45 MPH.
2. HITCH, BALL, COUPLER
• Check that the hitch on the towing vehicle is capable of towing the trailer. The towing
capability of the hitch is normally stamped on the hitch drawbar.
• Make sure the coupler and the ball are the same sizes and are rated equal to or greater than
the load.
• Never attach anything other than the proper size coupler to the ball for towing.
• CAUTION: Care must be taken when backing up the Trailer; only back up the trailer on a
straight path. If the Trailer is allowed to turn off the straight path while backing up, the Trailer
could jackknife, causing sever damage to the trailer and to the towing vehicle.
3. SAFETY CHAINS:
• Be sure to use safety chains.
• Check that the safety chains are attached to towing vehicle with the safety chains the same
length for each side.
• Do not allow chains to drag on the ground.
4. LOADING:
• Never overload the trailer. Maximum load is 1060 lbs.
• Load trailer evenly from side to side with 60% of the
load forward to the axle. It is important that the tongue
be pressing down on the hitch, but not exceeding a
downward force of 1060 lbs..
• Reduce weight in car trunk and rear seat areas by
amount of tongue weight of your trailer.
• It is against the law to carry passengers in any trailer.
5. LIGHTING:
• Check lighting before each use and every 100 miles to be sure the stop, tail, and turn signals
are working properly. REPLACE ANY BROKEN LENSES, REFLECTORS, OR BULBS.
• Check wires for good connections and possible fraying or wearing of insulation.
• Bulbs supplied with this trailer are for 12-volt systems.
• Bulbs used in tail light are: Number – 1157 – Stop and Tail.
• Bulb for clearance is: Number – 194.
6. TIRES:
• Check tires for wear and proper inflation before each use and every 100 miles.
• Tire pressure should be kept at 60 PSI.
• Check and tighten lug nuts. Torque to 85-90 FT-LBS.
• Re-torque after first 50 miles.
7. OPERATION:
• Know how to properly control your towing vehicle – trailer combination on the highway under
all conditions. Remember the loaded weight of the trailer will increase your braking and
stopping distances appreciably.

8 of 10 9 of 10
40IN. X 48IN. UTILITY TRAILER
OWNER’S MANUAL
• When towing a trailer over long distances, stop and check the tightness of all connections,
lights, and running gear every 100 miles.
• Carry emergency flares, and fire extinguisher if required for operation in your state.
• It is recommended to carry extra bulbs and fuses if you are towing the trailer at night over any
great distance.
8. MAINTENANCE
• Check and maintain the trailer, coupler, ball and hitch before each use and every 200 miles.
• Inspect coupler, hitch and ball for damage before each use.
• Ball or hitch can be damaged in parking, hitting curbs, dragging when crossing ditches or
railroad tracks.
• Check safety chains and hooks for wear and do not allow safety chains to drag on ground.
• To prevent bearing damage, disassemble and repack wheel bearing with a good grade of
wheel bearing grease every 2000-3000 miles or yearly.
• If you do not know how to repack wheel bearing, take your trailer to a qualified technician.
SPECIAL NOTICE FOR COUPLER
1. Only use a 1-7/8” ball hitch (not included) on the towing vehicle.
2. Temporarily remove the “R” Pin and Safety Pin. Then, pull up on the Trigger and lift up on
the Handle.
3. NOTE: To reduce friction between the hitch ball and Coupler, apply a layer of heavy weight
grease over the hitch ball.
4. With assistance, place the Coupler over the vehicle’s hitch ball and pull back on the Trigger
and push down on the Handle until the Trigger locks in the slot. Pull up and down on the
Coupler to make sure the hitch ball is fitting snuggly in the Coupler. There should be no play
between the hitch ball and Coupler.
IMPORTANT: If there is play, tighten the Adjustment Nut until no play is present – after
unlocking the handle, the Nut retaining plate (holding the adjusting nut in place) needs to be
pressed back while the nut is tightened. After Nut is tightened, the retaining plate needs to be
fit in place against the flats of the Nut to prevent it from moving. This adjustment should be
done by two people. If the Adjustment nut is too tight, the Handle will not lock.
After the Adjustment Nut is properly
adjusted, pull back on the Trigger and
push down on the Handle until the
Trigger locks in the slot. Pull up on the
Handle firmly to make sure the Trigger
is locked in place and the Handle
cannot move. Replace the Safety Pin
and the “R” Pin.
40IN. X 48IN. UTILITY TRAILER
OWNER’S MANUAL
IMPORTANT
The purpose of the following notices is to give you tips on safe use and operation of your utility
trailer.
1. Please read the instructions carefully and follow them step-by-step for easy assembly.
Please keep this instruction.
2. Please double check the assembling step-by-step to be sure each is followed.
3. Before using, please inspect your trailer.
4. Do not remove the VIN sticker from the tow bar.
NOTICE:
• Re-fill grease on bearing after every 3,000 miles of use.
• Keep tire pressure at 60 PSI, cold.
• Please insure that you comply with the following before using your trailer:
1. Tighten U-bolt.
2. Tighten lug nuts.
3. Tighten trigger lock on coupler.
4. Hook up safety chain.
5. Trailer load should not exceed its 1060 LB capacity and should be properly secured.
6. Trailer load size should not exceed trailer’s bed board size.
TRAILER LICENSING NOTICE:
Some states may consider that this trailer kit is and specially constructed or a homemade
vehicle for registration, licensing and/or titling purposes.
The M.C.O. (Manufacturer’s Certificate of Origin) supplied with your trailer must be filled out and
signed by the dealer transferring ownership to you.
When licensing your trailer, you will need the signed M.C.O., a purchase invoice, cash register
receipt, or bill of sale showing the purchase and retail sales tax or use tax collection by the
retailer. Take these to your local Department of Motor Vehicles and upon payment of the
appropriate State fees, you will be issued a title, registration and license plate (if required).
Some states will require inspection of the assembled and finished trailer kit before issuing a title
registration/license.
If you require additional information or guidance on licensing or titling, please consult your
State Department of Motor Vehicles.

10 of 10
40IN. X 48IN. UTILITY TRAILER
OWNER’S MANUAL
DIAGRAMS AND PARTS LIST
Note: Some parts and hardware are listed for illustration purposes only, and are not available
individually as replacement parts.
Part No.
1
3
4
5
5A
6
7
8
9
10
11
12
13
14
15
16
17
18
Description
M10 x 20mm Hex Bolts
M10 Nylon Nuts
Cross Member
Left Side Rail
Right Side Rail
Towbar
Spring Hangers
Spring Slide Plates
Slipper Spring
M14 x 80mm Hex Bolts
M14 Nuts
Axle
M10 U-Bolts
Spring Plates
Hub Assembly
Tire/Wheel Assembly
Lug Nuts
Bearings
Qty.
32
42
3
1
1
1
4
2
2
4
4
1
4
2
2
2
8
4
Part No.
19
20
21
22
23
24
25
27
28
29
29A
30
31
33
34
35
36
37
Description
3/4" Washers
Castle Nuts
4mm Cotter Pins
Dust Caps
Coupler
M10 x 90mm Bolts
Safety Chain
Tail Light Bracket
License Plate Bracket
Left Tail Light
Right Tail Light
Side Running Lights
Self Tapping Screw
3mm Cotter Pins
Fenders
Grease Fitting
3mm R Pin
Safety Pin M10 x 25mm
Qty.
2
2
2
2
1
2
1
2
1
1
1
2
4
4
2
2
1
1
40IN. X 48IN. UTILITY TRAILER
OWNER’S MANUAL
Reporting Safety Defects
If you believe that your vehicle has a defect which could cause a crash or could cause injury or
death, you should immediately inform the National Highway Traffic Safety Administration
(NHTSA) in addition to notifying the distributor.
If NHTSA receives similar complaints, it may open an investigation, and if it finds that a safety
defect exists in a group of vehicles, it may order a recall and remedy campaign. However, NHTSA
cannot become involved in individual problems between you, your dealer, or Northern Tool &
Equipment Company, Inc.
To contact NHTSA, you may call the Vehicle Safety Hotline toll-free at 1–888–327–4236 (TTY:
1–800–424–9153); go to http://www.safercar.gov; or write to:
Administrator, NHTSA
1200 New Jersey Avenue SE.
Washington, DC 20590.
You can also obtain other information about motor vehicle safety from http://www.safercar.gov
WARRANTY
One-Year Limited Warranty
Distributed by
Northern Tool + Equipment Co., Inc.
Burnsville, MN 55306
NorthernTool.com
Made in China