Curt Group 40247 User manual

CURTMFG.COM •NEED ASSISTANCE? •877.287.8 634 •40247-INS-RD •PAGE 1
INSTALLATION MANUAL 40247
Parts List
Item Qty Description
1 1 Trailer ball assembly
2 1 Anti-rotation base plate
3 1 Lock washer, 1"
4 1 Hex nut, 1"
Ball mount sold separately
Product Registration
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Level of Difficulty
Easy
Weight Capacity
Gross trailer weight (GTW) 7,500 lbs.
Tongue weight (TW) 750 lbs.
Tools Required
Torque wrench Socket
Torque Specifications
1" bolt 250 ft-lbs.
Use above torque setting unless otherwise noted
Product Photo
WARNING
Never exceed the vehicle manufacturer's recommended towing capacity. The ratings of
the trailer ball are intended to represent the capability of the product and in no way reflect
the ratings or capacity of the towing system it is being used with. The consumer or
operator are strongly advised to know the ratings of the various components of the
towing system and never exceed the limits of the lowest rated component being used.
Use of any pin other than what is provided by the manufacturer
could be a serious safety hazard and will void the warranty.
Ensure that the safety chains operate freely around the trailer ball
system and do not become entangled in the trailer ball system.
If the ball is ever able to move with minimal force by hand more than five degrees
from the vertical position, the product must be replaced. Use of a heavily worn
or damaged trailer ball assembly may result in the trailer becoming separated
from the vehicle. Consult CURT Product Support if you have any questions.
Periodically check the hex nut and ensure it is tightened to the correct torque specifications.
Before every use, be sure the snap ring on the pivot pin
of the trailer ball assembly is in place and properly seated.
Immediately discontinue product use if the snap ring is missing on the end of the trailer ball
pivot pin or if the trailer ball pin has backed partially out of the trailer ball assembly.
Do not use the trailer ball on ball mounts that do not have a flat mounting
surface. The trailer ball assembly and anti-rotation base plate must fully
contact the ball mount when the hex nut is torqued to the listed specification.
NOTICE
Before you begin installation,
read all instructions thoroughly.
Proper tools will improve the quality of
installation and reduce the time required.
Ensure the trailer ball shank diameter
corresponds with the ball mount hole size.
Ensure the trailer ball size matches
the trailer coupler. If they do not,
the trailer could become uncoupled.
To help prevent damage to the
product or vehicle, refer to the specified
torque specifications when securing
hardware during the installation process.
RockerBall™should be greased prior to initial
use and periodically as described in step 3.

CURTMFG.COM •NEED ASSISTANCE? •877.287.8 634 •40247-INS-RD •PAGE 2
Step 1
Place the anti-rotate base plate (#2) over the trailer ball shank (#1).
The trailer ball must be mounted so that the ball articulation
is in the same direction as vehicle travel.
Place the lock washer (#3) over the trailer ball shank
and secure with the provided hex nut (#4).
DANGER
The anti-rotatation base plate must be used in the
orientation shown or serious injury or death may result.
DANGER
The anti-rotatation base plate tabs must fit freely over the width
of the ball mount tongue or serious injury or death may result.
1
2
3
4
Grease zerk
location
Vehicle
travel
Trailer ball
pivot pin
Step 2
Tighten the hex nut (#4) to 250 ft-lbs. The threaded
shank must extend beyond the nut when tightened.
DANGER
Failure to tighten hardware to the specified
torque can result in serious injury or death.
ASSEMBLY
Parts List
Item Qty Description
1 1 Trailer ball assembly
2 1 Anti-rotation base plate
3 1 Lock washer, 1"
4 1 Hex nut, 1"
Ball mount sold separately
Step 3
Grease the trailer ball assembly, using the grease zerk
located on the bottom of the RockerBall™shank. Grease
prior to initial use and once every 3 months or 3,000 miles
of use with a high-quality molybdenum-based grease.
DANGER
Failure to grease the trailer ball assembly may lead
to failure and can result in serious injury or death.
RockerBall™is adequately lubricated when
grease can be seen in the areas marked below.