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WARNING

Improper tongue weight (load distribution) 
can result in loss of control of the trailer, 
leading to death or serious injury.

Make certain that tongue weight is within 
the allowable range.

Be sure to:
• Distribute the load evenly, right and left.
• Keep the center of gravity low.

• Distribute the load front-to-rear to provide    

proper tongue weight (see chart). 

4.5.1  Checking Tongue Weight

To check the tongue weight, the tow vehicle and 
trailer must be on level ground, as they will be when 
the trailer is being towed.

Take the trailer to a truck stop or grain elevator where 
there is a “certifi ed” scale. Place the tow vehicle only 
onto the scale and get the weight. This weight must 
be less than your tow vehicle’s GVWR. 

Pull the trailer onto the scale and uncouple it from 
the tow vehicle, leaving just the trailer on the scale. 
Get a ticket which lists the total trailer weight. Re-
connect the trailer to your tow vehicle and the drive 
the tow vehicle wheels off the scale, just leaving the 
trailer axles on the scale. Get a “ticket”, which lists the 
trailer’s axle weight. Simply subtract the axle weight 
from the total weight to determine the hitch weight.

While you are at the scale, you should weigh the 
entire combination vehicle. This result should be less 
than the Gross Combined Weight Rating (GCWR) 
for your towing vehicle. Some scales allow you to get 
individual axle weights also. If this is possible, get the 
tow vehicles front and rear axle weights to make sure 
they are in the same proportion as the tow vehicle 
alone, and that the rear axle is not overloaded.

4.6  Adjust Hitch Height (If Equipped)

The height of the hitch on the trailer must be adjusted 
so that the trailer, when loaded to rated capacity, is 
level while connected to the tow vehicle. A level trailer 
allows equal weight distribution on the axles.

Your dealer or a trailer service center can perform 
this adjustment or you can use the following steps to 
adjust the hitch height yourself.

If the trailer is not equipped with an adjustable hitch, 
an offset ball mount may be available from your hitch 
manufacturer.

^

 

WARNING

Improper hitch height adjustment can 
result in overloaded tires, blowout and 
loss of control, leading to death or serious 
injury.

Adjust the hitch height so that the loaded 
trailer is level.

1. 

Connect trailer to tow vehicle and load the trailer 
to rated capacity See Loading And Unloading.

2. 

Park the tow vehicle and trailer on a fi rm level 
surface.

3. 

Stand away from the trailer and visually verify if 
the trailer is level front-to-rear. If the front of the 
trailer is higher than the rear, the hitch must be 
raised. If the front of the trailer is lower than the 
rear, the hitch must be lowered.

4. 

Uncouple trailer from tow vehicle. See Coupling 
And Uncoupling.

5. 

Remove the lock nuts and bolts (1) on hitch. 
Discard lock nuts. Inspect bolts for damage and 
replace if necessary. Contact your dealer for the 
correct size and grade of bolts.

^

 

WARNING

Used lock nuts are prone to loosen, 
resulting in the hitch separating from the 
trailer, which can lead to death or serious 
injury.

NEVER re-use a lock nut.

Use new lock nuts each time the hitch 
height is adjusted.

Contact your dealer for the proper grade 
and size of lock nut.

6. 

Raise or lower the hitch as necessary.

7. 

Install bolts and new lock nuts.

8. 

Tighten lock nuts to torque specifi ed by your 
dealer.

9. 

Couple the trailer to the tow vehicle and verify that 
the trailer is level front to rear. Adjust if necessary.

10. 

Unload trailer. See Loading And Unloading.

Coupling To Tow Vehicle

Summary of Contents for Enclosed Trailer

Page 1: ...s safety information and instructions for your trailer You must read this manual before loading or towing your trailer You must follow all safety precautions and instructions Bumper Pull Trailers Apri...

Page 2: ...ing Safety Defects 16 3 Tire Safety Information 17 3 1 Trailer Tire Information 17 3 2 Steps For Determining Correct Load Limit Trailer 18 3 2 1 Trailers 10 000 Pounds GVWR Or Less 18 3 2 2 Trailers O...

Page 3: ...ins 30 4 3 4 Connect Electrical Cable 31 4 3 5 Attach Breakaway Brake Lanyard 31 4 3 5 1 Test Electric Brakes 31 4 3 5 2 Test Electric Breakaway Brakes 31 4 3 5 3 Test Surge Brakes If Equipped 32 4 3...

Page 4: ...9 2 2 3 Electric Brakes 46 9 2 2 4 Tow Vehicle Operated Electric Brakes 46 9 2 2 5 Electric Brake Magnets 46 9 2 3 Trailer Brakes Surge If Equipped 46 9 2 3 1 Surge Brake Master Cylinder 46 9 2 3 2 H...

Page 5: ...lease have the VIN number available for the dealer The VIN number is normally on the front left side of the trailer For future reference please write your VIN number in the space below _______________...

Page 6: ...property 2 2 Major Hazards Loss of control of the trailer or trailer tow vehicle combination can result in death or serious injury The most common causes for loss of control of the trailer are Improp...

Page 7: ...oad surfaces when driving a tow vehicle with a trailer than driving a tow vehicle without a trailer Anticipate the trailer swaying Swaying can be caused by excessive steering wind gusts roadway edges...

Page 8: ...e system If the breakaway brake system is not working do not tow the trailer Have it serviced or repaired 2 2 7 Matching Trailer And Hitch DANGER Be sure hitch and tow vehicle are rated for the Gross...

Page 9: ...us injury WARNING Wheel nuts or bolts are prone to loosen after being first assembled Death or serious injury can result Check wheel nuts or bolts for tightness on a new trailer and after re mounting...

Page 10: ...iler is evenly loaded left right Towing stability also depends on keeping the center of gravity as low as possible WARNING Improper tongue weight load distribution can result in loss of control of the...

Page 11: ...ric brakes and all of the lights on your trailer are functioning properly before towing the trailer Electric brakes and lights on a trailer are controlled via a connection to the tow vehicle generally...

Page 12: ...l clockwise with your hands at the bottom of the wheel will move the rear of the trailer to the left while backing up Be careful not to allow the trailer to turn too much because it will hit the rear...

Page 13: ...13 2 2 17 Safety Warning Labels On Your Trailer Depending on trailer configuration your trailer may not be equipped with all safety labels shown Safety...

Page 14: ...14 Safety...

Page 15: ...ect you and others against death or serious injury all applicable labels shown must be on the trailer and must be legible If any of these labels are missing or cannot be read contact your dealer for r...

Page 16: ...estigation 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 dea...

Page 17: ...It is actually better for the tire to be rolling down the road than to be idle During use the tire releases lubricants that are beneficial to tire life Using the trailer tires often also helps preven...

Page 18: ...y in all cases It is best to have your tires inspected by a tire supplier to determine if your tires need to be replaced If you are storing your trailer for an extended period make sure the tires are...

Page 19: ...l rubber which when inflated bears the load Chunking The breaking away of pieces of the tread or sidewall Cold inflation pressure The pressure in the tire before you drive Cord The strands forming the...

Page 20: ...ember which can be mounted on a vehicle Normal occupant weight This means 68 kilograms 150 lbs times the number of occupants specified in the second column of Table I of 49 CFR 571 110 Occupant distri...

Page 21: ...ct you and others from avoidable breakdowns and accidents Improve fuel economy Increase the life of your tires This booklet presents a comprehensive overview of tire safety including information on th...

Page 22: ...hicle s design load limit that is the greatest amount of weight a vehicle can safely carry and the vehicle s tire size The proper tire pressure for your vehicle is referred to as the recommended cold...

Page 23: ...ions spaced intermittently in the bottom of the tread grooves When they appear even with the outside of the tread it is time to replace your tires Another method for checking tread depth is to place a...

Page 24: ...a recall Tire Ply Composition and Materials Used The number of plies indicates the number of layers of rubber coated fabric in the tire In general the greater the number of plies the more weight a ti...

Page 25: ...venting Tire Damage Slow down if you have to go over a pothole or other object in the road Do not run over curbs or other foreign objects in the roadway and try not to strike the curb when parking Tir...

Page 26: ...port It is the lowest of axle wheel or tire rating Sometimes the tire or wheel rating is lower than the axle manufacturers rating and will then determine GAWR The sum total of the GAWR for all trailer...

Page 27: ...brake lanyard such that the switch will only activate pin pulls out if the coupler connection comes loose Jack A device on the trailer that is used to raise and lower the trailer tongue WARNING An imp...

Page 28: ...face of the coupler to be above the top of the hitch ball 4 3 1 2 Prepare Coupler And Hitch 1 Lubricate hitch ball and inside of coupler with a thin layer of automotive bearing grease 2 Remove safety...

Page 29: ...4 3 2 1 Before Coupling Trailer To Tow Vehicle 1 Be sure the size and rating of pintle match the size and rating of the ring Hitch ring and pintles are marked with their size and rating WARNING Ring t...

Page 30: ...the tongue jack to raise the tow vehicle more than 1 inch 5 If the ring cannot be secured to the pintle do not tow the trailer Contact your dealer for assistance 6 Lower the trailer so that its entire...

Page 31: ...out before all of the slack in the safety chains is taken up Do not connect the lanyard to a safety chain hitch ball or hitch ball assembly This would keep the breakaway brake system from operating w...

Page 32: ...Surge Brakes If Equipped Hydraulic surge actuator systems provide automatic and smooth trailer braking without special application by the tow vehicle driver While this is extremely convenient it can s...

Page 33: ...jack pad will support the tongue load 7 Rotate jack handle to extend the jack and transfer the weight of the trailer tongue to the jack 8 Raise the trailer coupler above the tow vehicle hitch 9 Drive...

Page 34: ...d so that the trailer when loaded to rated capacity is level while connected to the tow vehicle A level trailer allows equal weight distribution on the axles Your dealer or a trailer service center ca...

Page 35: ...35 Coupling To Tow Vehicle...

Page 36: ...distribution and proper tongue weight The total weight of the trailer and its contents must never exceed the total weight rating of the trailer Gross Vehicle Weight Rating or GVWR Do not transport peo...

Page 37: ...he trailer is equipped with ventilation openings do not block these openings WARNING Accumulation of hazardous fumes can cause death or serious injury Do not block access to ventilation openings 5 Sec...

Page 38: ...unload cargo from trailer 7 Trailer Equipped With Removable Ramps Remove ramps and place in storage position Secure ramps to trailer Trailer Equipped With Drop Ramp Door Carefully raise ramp door Latc...

Page 39: ...upling To Tow Vehicle section of this manual Test Tail Stop and Turn Lights Test trailer brakes Safety breakaway lanyard fastened to tow vehicle not to safety chains See Coupling To Tow Vehicle sectio...

Page 40: ...es are fitted with a mechanism that will automatically adjust the brake shoes Read your axle and brake manual to see if your brakes adjust automatically If you do not have the axle and brake manual co...

Page 41: ...may be equipped with an accessory battery The battery may be kept charged either by the tow vehicle by an auxiliary charger or by using an on board battery maintainer charger if equipped If the traile...

Page 42: ...ion Check master cylinder level Section 4 Section 9 Shoes And Drums Adjust Section 9 Safety Chains And Hooks Check for wear damage Section 4 Coupler And Hitch Ball Check for cracks pits and flats Repl...

Page 43: ...Inspect tread and sidewalls thoroughly Replace tire when treads are worn when sidewall has a bulge or sidewall is worn Rotate every 5 000 Miles Section 9 Section 9 Section 9 Brakes Electric Surge Che...

Page 44: ...at top See Jack Mfr s Manual Structure Frame Members Welds Inspect all frame members bolts rivets Repair or replace damaged worn or broken parts Inspect all welds Repair as needed Section 9 Section 9...

Page 45: ...the repair done by your dealer WARNING Broken or damaged fasteners can cause injury or damage to trailer and contents Inspect for and repair all damaged parts at least once a year 9 2 1 2 Welds All we...

Page 46: ...trailer brakes if the trailer uncouples from the tow vehicle Be sure to check maintain and replace the battery according to the battery manufacturer s instructions Your trailer may use the hydraulic s...

Page 47: ...cked so that the trailer will not roll away 2 Fill the master cylinder with correct fluid 3 Install a bleeder hose on the bleeder screw of the farthest wheel cylinder from the actuator If the trailer...

Page 48: ...sent use a grease gun to lubricate the jack mechanism Grease the gears in the top of hand cranked jacks once a year by removing the top of the jack and pumping or hand packing grease into the gears 9...

Page 49: ...ubber plug from the axle end 2 Place grease gun on zerk 3 Pump grease until new grease begins to appear Use a different color grease each time so you will know when the new grease begins to appear 4 I...

Page 50: ...accurate torque readings Over tightening will result in breaking the studs or permanently deforming the mounting stud holes in the wheels and will void the axle warranty See your axle manufacturers ma...

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