atwood Gooseneck Couplers - Manual

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SAFETY ALERT SYMBOLS
Safety Symbols alerting you to potential personal safety hazards. Obey all safety
messages following these symbols.
ƽ
WARNING
ƽ
CAUTION
avoid possible avoid possible
injury or death injury and/or property damage
FOR YOUR SAFETY READ ALL INSTRUCTIONS
BEFORE INSTALLATION AND OPERATION
Installer: Provide these instructions to the consumer.
Consumer: Keep documents for future reference.
The Atwood Gooseneck Coupler or Gooseneck Coupler and Stem is a
ball type coupler designed to be used on trailers that are towed by
vehicles having the ball mounted above and forward of the rear axle.
Identify Gooseneck Coupler and follow correct installation and main-
tenance instructions for that part number.
INSTALLATION
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CAUTION
HAZARDOUS FUMES
• adequate ventilation must be provided when welding.
WELDING INSTRUCTIONS
• M . I . G . OR STICK - Make 5/16˝ fillet welds minimum. Use No. E6011 AWS
welding rod, 5/16” diameter. Machine amps (AC or DCRP) 2 160-180
amps with 50 volts.
• M . I . G . WELDING - Use A.W.S. ER 70S-3 or 6 wire or equivalent with a
diameter of .035 - .045. The recommended shielding gas mixture is
75% - 95% Argon & 25% - 5% CO
2
.
• STICK WELDING - Use E6011 A.W.S. welding rod or equivalent with a
diameter are as follows: 1/8˝ electrode set power between 115-130
Amps DC or 5/32˝ electrode set power between 140-160 Amps DC.
MPD 75025 GOOSENECK COUPLER 25,000 LB . CAP .
Max. Gross Vehicle Weight:
25,000 lbs.
Ball Size:
2-5/16˝ diameter
Vertical Load Capacity:
5,000 lbs.
This gooseneck coupler must be installed ONLY by welding to the
gooseneck tube of gooseneck type trailers.
1. Center ball cup 1-A inside the end of gooseneck tube 1-B. Line up
the guide 1-C ramp toward forward end of trailer.
2. Attach coupler to gooseneck tube by welding all around where tube
base meets coupler. Use 5/16˝ fillet weld No. E6011 AWS welding rod
5/16˝ diameter. Machine amps (AC or DCRP) @ 160-180 with 50 volts.
3. See Coupling and Uncoupling Procedures and Maintenance.
GOOSENECK COUPLER WITH STEM
DROP TUBE STEM WITH COUPLER MPD 75401
SCREW ADJUSTABLE STEM WITH COUPLER MPD 75004
Max. Gross Vehicle Weight: 25,000 lbs.
Ball Size: 2-5/16˝ diameter
Vertical Load Capacity: 5,000 lbs.
DROP TUBE AND SCREW ADJUSTABLE STEM APPLICATIONS -
1. Weld the outer tube to the trailer frame and gusset the tube with
side plates of sufficient capacity for the trailer GVRW and design.
2. Weld the top and bottom of the side plates. Weld both sides of the
plates 4-A.
3. Weld the top and bottom areas where the trailer frame meets the
gooseneck stem. 4-B
4. Weld the entire length of the side plates where they meet the trailer
frame. Weld both sides. 4-C
5. Dimensional limits for gooseneck attachment:
3-C 3/8˝ thick side plates 3-D 3/4˝ 3-E 24-3/16˝
3-F 8˝ minimum 3-H 3-1/2˝ maximum
3-G 2-1/16˝ minimum to 12-1/16˝ maximum
6. Check all welds for correct size, penetration and location.
OPERATION
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WARNING
PERSONAL INJURY / PRODUCT DAMAGE
• Safe towing practice requires the proper use of safety chains used in
accordance with instructions provided by the trailer manufacturer.
• Use only a 2-5/16˝ diameter hitch ball with the correct towing weight
capacity.
• Check that the ball has been completely inserted into the coupler ball
socket and the ball clamp (inside the coupler) is closed around the under-
side of the tow ball and the latch is in the closed position.
• The loaded weight of the trailer must never exceed the minimum
capacity marked on the coupler, tow ball, hitch, trailer or vehicle.
• Check coupler, hitch and ball for damage or wear before each use.
Assure all parts operate freely. Replace any component if worn or
damaged.
• Failure to follow warnings and instructions could result in separation
of tow vehicle and trailer which can result in death, personal injury
and property damage.
• Use caution when backing or towing vehicle for hook-up, damage to
coupler may result.
DROP-TUBE STEM & COUPLER MPD 75401
1. Put the drop-tube stem in the proper position before connecting it to
the hitch ball in the pick-up bed. This will allow level towing of the
trailer. Adjustments can be every 2˝, up to 10˝ maximum 4-D.
2. Adjust the stem so your truck/trailer combination is in a correct level
towing position. When adjusting the stem all weight must be off the
gooseneck stem and coupler. Use the trailer jacks to raise the cou-
pler off the hitch ball above the truck bed before removing the 1˝
diameter bolt from the stem. Raise or lower the stem as needed.
Replace the bolt and nut. Tighten to 100 ft./lbs. torque.
3. See Coupling and Uncoupling Procedures and Maintenance.
SCREW ADJUSTABLE STEM & COUPLER MPD 75004
1. The adjustable screw stem is adjustable over a 10˝ length 3-G. This
stem can level the trailer before or after hook-up is made to the
hitch ball in the pick-up bed.
2. To raise the trailer, lift the adjustable stem handle 3-B and turn it
counterclockwise ۗ.
3. To lower the trailer, lift the adjustable stem handle 3-B and turn it
clockwise ۖ.
4. See Coupling and Uncoupling Procedures and Maintenance.
ENGLISH, FRANÇAIS
(et Canada)
•Installation •Operation •Maintenance
Effective 11/21/07
GOOSENECK COUPLERS
LITERATURE NUMBER
MPD 75026
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