Owners manual

ManualsBrandsCurt ManualsAutomotiveCURT 17330 Weight Distributing Hitch Trunion Bar

CAUTION: The tongue weight rating of the spring bars

represents the capacity of a pair of bars, not an individual

bar. Always use a pair of spring bars and be sure they are

of the same weight rating.

The loaded ball height should never be greater than the

uncoupled ball height. Front wheel overload and loss of rear

wheel traction can result and can lead to unstable handling.

It can reduce braking ability and create a tendency to

jackknife when turning or braking at the same time.

If the loaded trailer ball height is greater than the uncoupled

height, reduce take-up on the spring bar chains, re-measure

and adjust until the proper height is obtained.

CAUTION: If the lift chain is angled fore or aft at the top

within the lift bracket, it may catch on the bracket when

turning. This could damage the lift bracket or pry it open.

Keep the socket-mounted ends of the spring bars and

the lock pins in the head assembly free from dirt and well

lubricated. Excessive wear in this area may indicate an

overload or inadequate lubrication.

Keep the head assembly exterior clean. Do not allow dirt

or stones to lodge between the spring bars and the head.

Keep hitch parts painted to prevent rust and

maintain good appearance. Do not paint over labels.

Keep lift brackets clean and lubricated

to ensure ease of operation.

WARNINGS

MAINTENANCE

WEIGHT RATINGS

WARNING: NEVER EXCEED YOUR VEHICLE MANUFACTURER'S RECOMMENDED TOWING CAPACITY

INSTAllATIoN INSTRuCTIoNS

Part# Gross Trailer Weight Tongue Weight

Without Spring Bars

17300 Not to exceed 6,000 lbs.* Not to exceed 600 lbs.*

17301 Not to exceed 8,000 lbs.* Not to exceed 800 lbs.*

17302 Not to exceed 10,000 lbs.* Not to exceed 1,000 lbs.*

17330 Not to exceed 6,000 lbs.* Not to exceed 600 lbs.*

17331 Not to exceed 8,000 lbs.* Not to exceed 800 lbs.*

17332 Not to exceed 10,000 lbs.* Not to exceed 1,000 lbs.*

17333 Not to exceed 15,000 lbs.* Not to exceed 1,500 lbs.*

17322 Not to exceed 10,000 lbs.* Not to exceed 1,000 lbs.*

17422 Not to exceed 15,000 lbs.* Not to exceed 1,500 lbs.*

With Spring Bars

17300 5,000 - 6,000 lbs. 500 - 600 lbs.

17301 6,000 - 8,000 lbs. 600 - 800 lbs.

17302 8,000 - 10,000 lbs. 800 - 1,000 lbs

17330 5,000 - 6,000 lbs. 500 - 600 lbs.

17331 6,000 - 8,000 lbs. 600 - 800 lbs.

17332 8,000 - 10,000 lbs. 800 - 1,000 lbs

17333 10,000 - 15,000 lbs. 1,000 - 1,500 lbs.

17322 8,000 - 10,000 lbs. 800 - 1,000 lbs

17422 10,000 - 15,000 lbs. 1,000 - 1,500 lbs.

* When spring bars are not used, the weight rating is dependent

upon the trailer ball manufacturer's weight ratings. Do not exceed

the maximum weight rating of the trailer ball.

TRuNNIoN BAR WEIGHT DISTRIBuTIoN

PAGE 1 • 1.800.798.0813 • NEED ASSISTANCE? • CuRTMFG.CoM

Summary of content (5 pages)

PAGE 1
Installation instructions warning: never exceed your vehicle manufacturer's recommended towing capacity trunnion Bar WEIGHT DISTRIBUTION MAINTENANCE Keep the socket-mounted ends of the spring bars and the lock pins in the head assembly free from dirt and well lubricated. Excessive wear in this area may indicate an overload or inadequate lubrication. Keep the head assembly exterior clean. Do not allow dirt or stones to lodge between the spring bars and the head.
PAGE 2
Measure the tow vehicle 5 16 17 15 4 3 10 9 19 6 1 13 7 14 Figure 1 20 18 8 Tow vehicle's uncoupled ball height will be set higher than the coupler height measured in Step 2 to allow for vehicle squat when coupled to trailer. PARTS LIST Qty Rear bumper to pavement Determine the 'target' uncoupled ball height for the tow vehicle 9 11 12 For passenger cars, add 1/8" for each 100 lbs. of tongue weight.
PAGE 3
Step 4 Install washers (#20) over short adjustment rod (#18). 10 9 19 1 20 2 18 8 9 Attaching the trailer to the ball Using the trailer tongue jack, lower the coupler onto the trailer ball and close coupler latch. Do not retract jack fully at this time. Allow the jack to support some of the tongue weight. Raise the front of the trailer and back of the tow vehicle approximately 3" with tongue jack. This will allow easier installation of the chains on to the hook of each lift bracket.
PAGE 4
Lift bracket operation Before raising or lowering the lift bracket, raise the front of the trailer to reduce the spring bar chain tension. This will make the lift bracket operation easier and safer. WARNING: Keep clear of the pivot path of all moving parts when there is tension on the spring bar chain. Maintain control of the lift handle at all times when raising or lowering the spring bar. Be sure that the locking hair pin is in place once lift bracket is in the up position.
PAGE 5
TOWING TIPS Driving a tow vehicle Good habits for normal driving need extra emphasis when towing a trailer. The additional weight of the trailer affects acceleration and braking. Extra time should be allowed for passing, stopping and changing lanes. Signal well in advance of a maneuver to let other drivers know your intentions. Severe bumps and badly undulating roads can damage your towing vehicle, hitch and trailer, and should be negotiated at a slow, steady speed.