B&w 3770 User Manual
B&W Trailer Hitches
1216 Hawaii Road / PO Box 186
Humboldt, KS 66748
P:620.473.3664
F:620.869.9031
See Limited Lifetime Warranty at
bwtrailerhitches.com/warranty
NOTE: We recommend reading instructions before beginning the installation.
GM OEM Mount System Slider Hitch Installation Instructions
20,000 LBS. TRAILER WEIGHT
5,000 LBS. TRAILER TONGUE WEIGHT
Call or Email us for Installation Support
hitches@turnoverball.com www.bwtrailerhitches.com
1
Model 3770
2
COUPLER
COUPLER JAWS
COUPLER CAM
HANDLE SAFETY PIN
COUPLER
CAM HANDLE
SADDLE
HANDLE
BASE BOLT BAG (RVB3770)
ITEM DESCRIPTION QTY
1
Pivot Arm A
2
Pivot Arm B
3
1/2" Split Lock Washers
4
1/2" X 2" Cap Screw
COUPLER BOLT BAG (RVC3006)
ITEM DESCRIPTION QTY
5
Wire Torsion Spring
6
Mounting Clip
7
1/4" X 1/2" Cap Screw
8
1/4" Finish Nut
9
3/8" Button Head Cap Screw
10
3/8" Lock Nut
SADDLE
LOCKING PINS
PIVOT ARM
LATCH HANDLE
LATCH PIN
7
BASE ASSEMBLY
8
9
10
REQUIRED TOOLS
Installation of the Companion hitch requires a large torque wrench capable of
measuring 80 ft−lbs, a 3/4" socket, a 7/16", and 9/16" socket or wrench, a 7/32" allen
wrench, a pair of needle−nose pliers and a hammer.
65
3
4
1
1
8
8
1
1
1
1
2
2
Failure to comply with the safety information in these
WARNING
Read all installation and operating instructions along with all labels
before using this product.
Adding components to the chassis of any vehicle can be
hazardous. There is potential for damage to vehicle, injury from
tool usage and many other hazards. This installation must be
completed by someone who is aware of the hazards involved. This
person must be knowledgeable of proper safety procedures for a
vehicle installation of this nature, and for usage of the equipment
required to perform the installation.
Without proper knowledge, towing can be a dangerous activity.
Understand all the risks involved with towing before proceeding.
For information on towing safety, see
guide to Understanding Trailer and Towing Safety"
National Association of Trailer Manufacturers,
www.NATM.com.and your trailer manufacturer’s owner’s manual.
Do not exceed tow or tongue rating of coupler, tow or tongue
rating of hitch, or tow or weight ratings of truck or trailer. See
vehicle and trailer manufacturer information for ratings. Exceeding
these ratings may cause damage to towing components or loss of
attachment between the trailer and truck.
instructions could result in serious injury or death.
"The Trailer Handbook: A
from the
Additional caution must be used when towing a wedge car trailer.
Towing stability greatly depends on keeping the center of gravity
as low as possible. Load heavy cars over the axles. Never tow
with a single car on the front of the trailer. When towing a wedge
car trailer, never exceed speeds that are reasonable for the
roadway conditions (e.g. turns, going around a curve, etc.). Failure
to account for proper trailer center of gravity and speeds that are
reasonable for the roadway conditions may cause damage to the
truck, trailer, towing components, and loss of attachment between
the truck and trailer.
Do not modify this product in any manner. Doing so could alter its
integrity and lead to a loss of attachment between the trailer and
the tow vehicle.
Regularly check that all bolted connections are at the correct
torque specification. A visual inspection should be performed
before each time you tow.
Components of the hitch are heavy and cumbersome to handle.
Use proper lifting techniques when moving and handling parts.
PAGE 1 of 5
PREPARING TO INSTALL
Remove any debris and/or obstructions from the truck
bed, this includes any plastic caps which may be over
the attachment points. It may also be necessary to
remove the plastic grommets from around the mounting
points in order to fully seat the base down to the truck.
CAUTION: Lifting the slider base under the sheet
metal covers may cause damage to the base, grip
base by end rail supports to lift, see Figure B1.
WARNING: Whenever the slider base is being
moved, the slider handle must be in the locked
position, and the carriage must be unable to slide,
see Figure A1. Failure to ensure that the handle is in
the locked position can lead to property damage, or
serious injury.
SLIDER HANDLE
IN LOCKED POSITION
SLIDER CARRIAGE
3.
Adjust the tension in the latch handle
and visual guide refer to Figures B3 and B4.
, for parts list
With the handles in the latched position, tighten the
castle nut until snug to increase the tension on the
latch. Rotate the latch handle open and closed.
Tighten the castle nut slightly and rotate the handle
open and closed again. Repeat this process until you
feel the cam engage the attachment point while
closing the handle. The handle is set at the proper
tension when there is friction between the cam and
attachment point but the handle can still be closed by
hand without bumping, tapping, or otherwise forcing
the handle closed.
WARNING: Setting latch handle tension so that
excessive force is required to close the latch handles
may result in property damage and/or personal injury.
COTTER PIN
Figure A1: View of driver side of Slider Base.
INSTALL SLIDER BASE
WARNING: The latch cams and handles must be
adjusted to fit the tow vehicle. Failure to properly
adjust the cams and handles may result in property
damage and/or personal injury.
1.
Remove the latch pins from each side of the base and
rotate the handles out, see Figure B1. Place the base
over the attachment points and carefully lower it until
the latch cams pass through the floor and the base
rests flat against the top of the attachment points.
2.
Prepare to adjust latch tension.
place, remove the cotter pins from each of the four
castle nuts. Engage the cams with each attachment
point by turning the latch handles back to their locked
position, see Figure B2. If a handle will not turn easily,
loosen the castle nut until the cam will freely turn and
engage the attachment point.
Once the base is in
LATCH HANDLE
FLAT WASHER
TIGHTEN
FIGURE B3: List of latch parts.
LOOSEN
COTTER PIN
View of unlatched base.
Figure B2: View of closed latch handle.
Figure B1:
FIGURE B4: View of base leg.
4.
With the base firmly held down and each latch handle
closed, replace the latch pins removed in Step 1.
NOTICE: Verify latch tension each time the
Companion base is placed in a truck, and periodically
before towing.
END RAIL SUPPORTS
SHEET METAL COVERS
PAGE 2 of 5
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