B&W Trailer Hitches 1057R - Manual

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Turnoverball TM Gooseneck Hitch Installation Instructions
Model 1057R
B&W Trailer Hitches
1216 Hawaii Road / PO Box 186
Humboldt, KS 66748
800.248.6564
Fax:620.473.3766
Chevy-GMC (2007-2014)
1/2 Ton with Boxed Frame
***SHORT BED TRUCKS ONLY***
BEFORE INSTALLING
OVERHEAD LIFTING DEVICE
An overhead-lifting device, such as chain falls, engine hoist, or cable come-a-long, can be used to lift the center sec-
tion of the hitch in place. Lower a loop of rope or chain through the 4” hole in the truck bed floor 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 fits in the 4” hole in the truck bed floor. Main-
taining upward pressure may facilitate fastening the crossmember to the center section, especially if the truck bed
floor 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 BE-
FORE INSTALLATION. Be certain you will not damage fuel lines, brake lines or electrical wires when positioning hitch
components, drilling holes and tightening fasteners. 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 crossmem-
ber and center section components.
NOTE: We recommend reading instructions before beginning the installation.
WARNING: The tow vehicle’s towing capacities should under NO circumstances be exceeded.
Mounting Kit Box (GNRM1057)
ITEM DESCRIPTION QTY
1 Driver Side Plate 1
2 Passenger Side plate 1
3 Front Crossmember 1
4 Rear Crossmember 1
5 Sideplate Clamp 1
Mounting Kit Bolt Bag
6 4-3/16" X 4-1/4 X 1/2" U-Bolt 1
7 1/2" Retainer 2
8 1/2" Frame Bushing 2
9 1/2” Locking Strap 2
1/2" X 2" Carriage Bolt 2
1/2” X 1-1/2” Cap Screw 11
1/2" Finish Nut 11
1/2” Lock Washer 17
1/2" Flat Washer 13
O-Ring 1
Center Box (GNRC959N)
ITEM DESCRIPTION QTY
10 Center Section 1
11 2-5/16” Ball 1
12 Latch Pin Handle 1
Safety Chain Kit Bolt Bag
13 1/2” U-Bolt 2
14 Conical Springs 4
15 1/2” Lock Nut 4
5/16” X 3/4” Carriage Bolt 1
5/16” X 3/4” Cap Screw 1
5/16” Lock Nut 1
NOTICE: This product was designed to fit vehicles in their original,
“as manufactured” condition. Compatibility with vehicles having
replacement parts, or other modifications is not guaranteed.
Inspect vehicle for modifications before installation of this product.