B&W Trailer Hitches 1257 User Manual
BEFORE INSTALLING- OVERHEAD LIFTING DEVICE
An overhead-lifting device, such as chain falls, engine hoist, or cable comea-long, can be used to lift the center section of the hitch in place. Lower a
loop of rope or chain through the 4” hole in the truck bed oor and attach it
to the latch pin in the round hitch receiver tube in the center section. Use
the lifting device to raise the center section until the round hitch receiver
tube that protrudes from the center section ts in the 4” hole in the truck
bed oor. Maintaining upward pressure may facilitate fastening the crossmember to the center section, especially if the truck bed oor has been
distorted downward from heavy use. If you use an overhead-lifting device, it should be disconnected before
squaring the center section across the frame, installing the sideplates and torquing fasteners.
WARNING
Most trucks have FUEL LINES and/or BRAKE LINES and/or ELECTRICAL WIRES located along the frame rails
where B&W Turnoverball™ hitches install. Carefully examine the location of fuel lines, brake lines and electrical wires BEFORE INSTALLATION. Be certain you will not damage fuel lines, brake lines or electrical wires
when positioning hitch components, drilling holes, tightening fasteners, and lifting and lowering the truck bed.
The fuel tank vent, located on top of the gas tank, can be easily damaged during the installation of the hitch
components. Care must be taken when positioning the front crossmember and center section components.
STEP 2 – Pre-Installation
Remove the two bolts holding the exhaust heat shield using a 10 mm wrench. Locate the fuel pump control
on the inside of the driver’s side frame. Using a 12 mm wrench remove the two nuts on the outside of the
frame that are holding it in place (Fig. 1). Retain the nuts to be replaced later. Next locate the fuel vapor
canister box mounted just under the front bed crossmember on the driver’s side of the truck. Remove the
nut holding the wiring bracket to the back of the box (Fig. 2). This will be relocated later. On the top of the
passenger side frame rail locate the plastic wiring bracket and remove from top of frame. Place the wiring
harness inside the frame rail. It will be held in place with the sideplate. Locate the tail pipe hanger toward
the back of the tail pipe and slide the rubber hanger off of the tubing that is welded to the pipe (Fig. 3).
(Fig. 1)
STEP 3 – Cross Member Installation
(Fig. 2) (Fig. 3)
WARNING
On Short bed trucks, BEFORE INSTALLING THIS HITCH, check for adequate turning clearance between the
front of all of your trailers and the truck cab.
NOTICE:
At this time no accessories, including the model RVK3000 RV Companion 5th wheel hitch, will work with this model
of turnoverball™ except:
• 4” Toyota Hitch Extender (part# 4585)
• RV Companion 5th wheel hitch (model RVK3500),
with special socket post.
Important Information
Because of space restraints the 2007 Toyota Tundra mounting kit contains components that have
not been seen in any previous Turnoverball™ kits. For this reason it will not be possible to
store the ball in the inverted position. It also makes the 4” hole location very critical. It
is important to read the complete instruction sheet before beginning the installation.
INSTALLATION INSTRUCTIONS
BALL LOCATION: 2007 Toyota Tundra 4” hole location 42
STEP 1 – MARKING AND CUTTING 4 INCH HOLE IN TRUCK BED
Begin by measuring for the correct hole location in the truck bed oor. Measure from the tail gate end of
the truck bed oor by hooking a tape measure over the end of the truck box and mark the oor at 42 3/8”.
Next nd the center point between the wheel wells, where these marks intersect with the rst measurement
will be the center point of your four inch hole. This location is critical to the correct installation of the B&W
Turnoverball™ hitch so measure, mark and saw carefully. Make a four-inch hole at this location. B&W recommends using a four-inch hole saw, however the hole can be cut by other means. If your truck has a sprayin bed liner you will need to take into account when you are measuring to add the thickness of the applied
liner that has been sprayed over the end of the bed. If your truck has a drop-in plastic bed liner, you may
saw through both, but it is more difcult to accurately locate the midpoint between the fender wheel wells,
and to be sure that the bed liner does not move when sawing the hole. Once you have the four-inch hole in
the bed use a deburring tool or a die grinder and carefully remove the burr from the underside of the bed
around the hole.
3
/8” All beds.
There are four crossmember parts included in the kit. Two channel type and two at type. Place one of the
channel crossmembers between the top of the frame and the under side of the bed. Make sure that both
anges of the channel are facing down and the notches at each end are toward the front of the truck. Once
the crossmember is across both frame rails rotate it down and slide forward. Next install a at crossmember in the same manner and slide it forward. Install the other two in the same manner except with the
notches facing the rear of the truck. Slide them toward the rear as far as possible.
STEP 4 – Center Section Installation
Install 1/2” x 2” carriage bolts through the center four holes of the front crossmembers. The threaded
part of the bolts should face toward the rear of the truck with the square part of the bolts tting into the
square holes in the crossmembers. With the latch pin on the driver’s side, lift the center section up on to
the bolts and hand tighten with at washers, lock washers, and nuts. Now the center section and the front
crossmember can slide forward. This will allow the 4” round top of the center to be placed into the hole in
the truck bed. A lifting device as describe previously will help if available. With the top of the center section
placed through the hole in the bed, slide the rear crossmembers against the rear of the center and install
carriage bolts in the same manner as before. All bolts must be left loose at this point for sideplate installation.
STEP 5 – Side Plate Installation
Using the diagram at the right determine the driver and passenger sideplates. Place the appropriate side plate on the inside of the frame with the
small anges tting between the crossmembers. The top long ange will
sit on the upper leg of the frame with the bottom long ange sitting on
the top of lower leg of the frame. With each sideplate in place insert carriage bolts through the square holes in the crossmembers and through the
small anges on the sideplates. Place a at washer, lock washer and nut
on the bolts and leave loose at this time.
Next place a 5/8” x 1-1/2” bolt with a at
washer and frame spacer (see diagram at
right) through the oval holes in the frame.
Two will go through the bottom frame leg
using a 1/4” frame spacer and two in the
top frame leg using a 1/8” frame spacer. After passing through the frame and sideplate
install a lock washer and nut.
STEP 6 - Tighten Hardware
Make sure that the hitch crossmembers are spaced equally from side-to-side and front to rear. Make sure
the center section is tight against the under side of the truck bed and tighten the eight 1/2” carriage bolts
holding the center section to the crossmembers to 80 ft. lbs. Next tighten the four 1/2” carriage bolts
holding the crossmembers to the side plates to 80 ft. lbs. Make sure that the frame spacers are completely
into the oval holes in the frame and tighten the four 5/8” bolts holding the sideplates to the frame, torque
to 100 ft. lbs.
B&W Trailer Hitches
1216 Hawaii Road / PO Box 186
Humboldt, KS 66748
P:620.473.3664
F:620.473.3766
NOTE: We recommend reading instructions before beginning the installation.
WARNING: The tow vehicle’s towing capacities should under NO circumstances be exceeded.
STEP 7 – INSTALL LATCH PIN RELEASE HANDLE
WARNING: LATCH PIN WILL NOT FUNCTION PROPERLY IF HANDLE IS NOT INSTALLED CORRECTLY.
Install the latch pin handle from inside the center
section. Insert handle through the oval hole on the
driver’s side and between the bed and frame, as
shown. Make sure that square tab welded on the
latch pin is facing to the rear of the truck. Place the
loop at the end on the handle on the top of the tab.
Install the 3/8” x 3/4” bolt through the loop then
through the tab. Secure with the 3/8” lock nut. (See
diagram at right).
STEP 8 – Reinstall Components
Re-attach the fuel pump control to the driver’s side frame that was
removed earlier. (If air springs are being used move the relay to the
inside of the side plate and mount in the holes supplied). Using the
relocation bracket, 5/16” carriage bolt and 5/16” ange nut supplied, reattach the wiring bracket to the fuel canister. (See diagram
at right)
Some trucks may need the exhaust pipe lowered slightly. If the tail
pipe has less than 1/4” clearance between it and the hitch use the
lowering bracket that is supplied in the kit. Slide it through the lower slot in the rubber hanger and turn
downward. This will allow the tube on the tailpipe to slide through the bracket and lower the pipe slightly
to give clearance for the hitch. (See diagrams below)
TurnoverballTM Gooseneck Hitch Installation Instructions
Call or Email us for Installation Support
Model 1257R
Toyota Tundra (2007 - 2014)
NOTICE: The 2-5/16 Ball cannot be turned over and stored
in the socket of this hitch.
NOTICE: At this time no accessories, including the model
RVK3000 RV Companion 5th wheel hitch and the RVK3400
slider, will work with this model of turnoverball™ except:
• 4” Toyota Hitch Extender (part# 4585)
• RV Companion 5th wheel hitch (model RVK3500),
with special socket post.
800.248.6564 hitches@turnoverball.com
www.turnoverball.com
STEP 9 – Install Safety Chain U-Bolts
To install the safety chain U-bolts it is necessary to drill four ½” holes through the truck bed oor. Drill
the holes from beneath the truck, through the two holes located on each side and closest to the round
receiver tube in the center section. This will locate the safety chain U-bolt in the lowest point of the oor
corrugation. After you drill the four holes clean the burrs from around the holes in the top of the bed then
drop a U-bolt through each pair of holes. Place a spring and lock nut on each of the four legs. Tighten the
nuts until ush with the bottom of the U-bolts.
STEP 10 - Re-engage Latch Pin Handle
Retract the latch pin by pulling the handle all the way out until it stops and then rotate it clockwise. Place
the 2-5/16” ball in the hitch receiver. Engage the latch pin by rotating the handle counterclockwise. Be
certain the latch pin passes through the holes in the 2-5/16” ball and fully engages through the hitch receiver. Remove and grease the square base of the 2-5/16” ball.
Copyright 2013
B&W Trailer Hitches
ALL RIGHTS RESERVED
1257R 11 15 2013
Parts List
1 - Crossmembers
2 - Crossmember Brace
3 - Center Section
4 - Driver’s Side Sideplate
5 - Passenger’s Side Sideplate
6 - Safety Chain U-Bolts
7 - Latch Pin Handle
8 - 2-5/16” Ball
9 - Springs
10 - 1/2” Lock nuts
Hardware Kit
4 ea. - 5/8” cap screws
4 ea. - 5/8” nish nuts
4 ea. - 5/8” at washers
4 ea. - 5/8” lock washers
12 ea. - 1/2” carriage bolts
12 ea. - 1/2” nish nuts
12 ea. - 1/2” lock washers
12 ea. - 1/2” at washers
1 ea. - 5/16” carriage bolt
1 ea. - 5/16” ange nut
Safety Chain Kit
2 ea. - 1/2” U-bolts
4 ea. - 1/2” lock nuts
4 ea. - springs
1 ea. - 3/8”x3/4” Bolt
1 ea. - 3/8” Lock nut
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