1
SAFETY ALERT SYMBOLS
Safety Symbols alerting you to potential personal safety hazards. Obey all safety
messages following these symbols.
WARNING 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: Read and keep documents available for future reference.
TRAILER & COUPLER CLASSIFICATION
TRAILERS WITH A TRAILERS WITH A GVWR
GVWR OVER NOT TO EXCEED
(MINIMUM)(MAXIMUM)
Class 1 0 2000 lb. (910 kg)
Class 2 2000 lb. - (910 kg) 3500 lb. (1590 kg)
Class 3 3500 lb. - (1590 kg) 5000 lb. (2270 kg)
Class 4 5000 lb. - (2270 kg) 10,000 lb. (4540 kg)
Trailer GROSS VEHICLE WEIGHT RATING (GVWR) = Maximum trailer weight with load
INSTALLATION
CAUTION
HAZARDOUS FUMES
• Adequate ventilation must be provided when welding.
WELDING INSTRUCTION
• M.I.G. OR STICK - Class 2 & 3 coupler-Attach with 1/8˝ fillet weld min.
Class 4 coupler-Attach with 5/32˝ fillet weld minimum.
• 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.
CAUTION
PRODUCT DAMAGE
• Coupler latching mechanism must operate freely after welding installation.
• Do not attach ground strap to latch during welding.
STRAIGHT TONGUE COUPLERS
SAE/CSA Class 2 Part # 80051, 80055, 80056
BOLT APPLICATION
1. Coupler must overlap frame 4-7/8˝ minimum (
FIG 1-A.)
2. Fasten with two 1/2˝ diameter bolts S.A.E. grade 5 and lock nuts or
nuts and lock washers (FIG 1-D) (hardware not included).
3. To prevent collapse of coupler sides during bolt tightening, use
spacers (1/2˝ pipe or equivalent) placed between the inside surface
of coupler frame (
FIG 1-E) (hardware not included).
4. Torque bolts to 74-78 ft. lbs. (dry).
5. Retorque bolts after first two hours of service, then continue to fol-
low maintenance schedule.
WELD APPLICATION
1. Coupler must overlap frame 4-7/8˝ minimum (FIG 1-A.)
2. Follow
WELDING INSTRUCTION.
3. Weld along top, back and sides specifically under flange where
coupler meets the trailer frame (
FIG 1-B.)
STRAIGHT TONGUE COUPLERS
SAE/CSA Class 3 Part # 80060, 80082, 80083
WELD ONLY:
1. Front edge of frame must contact internal frame stop on coupler
(
FIG 2-D.)
2. Coupler must overlap frame (FIG 2-A.)
80082, 80083 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1/16˝ minimum
80060 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7/8˝ minimum
3. Follow
WELDING INSTRUCTION.
4. Weld along top, back and sides specifically under flange where
coupler meets the trailer frame (
FIG 2-B.)
80082, 80083
. . . . . . . . . . .5-1/6˝ minimum horizontal weld length
80060 . . . . . . . . . . . . . . . . . . . .4-7/8˝ minimum horizontal weld length
SAE/CSA Class 4 (8500 lbs. cap.) Part # 80131
WELD ONLY:
1. Frame to penetrate coupler 7-5/8˝ minimum (
FIG 3-A.)
2. Follow
WELDING INSTRUCTION.
3. Weld along top, back and sides specifically under flange where
coupler meets the trailer frame
FIG (3-B.)
80131
. . . . . . . . . . . . . . . . . . . .7-5/8˝ minimum horizontal weld length
WELD BETWEEN COUPLERS
SAE/CSA Class 2 Part # 82311, 82315
SAE/CSA Class 3 Part # 80082, 80083
CAUTION
COUPLER OR FRAME DAMAGE
• A bottom support plate must be used with all Atwood Weld Between
Couplers.
• Do not attach ground strap to latch during welding.
• Weld completely around bottom plate using
WELDING INSTRUCTION.
WELD ONLY:
1. Front edge of frame must butt against side flanges of coupler
FIG 4-A. Weld full length both sides as indicated in
FIG 4-B. Weld around coupler and frame as shown.
2. Follow
WELDING INSTRUCTION.
3. Bottom rear of coupler and frame must be enclosed by a plate
welded to the frame to prevent flexing of frame and coupler.
(
FIG 4-E)
A-FRAME COUPLERS
SAE/CSA Class 3 Part # 80072, 80075, 84035, 84176
SAE/CSA Class 4 Part # 80101, 88007, 88555, 88010, 88600
CAUTION
COUPLER OR FRAME DAMAGE
• Atwood Class 3 & 4 couplers are designed for use on 50° A-Frames only.
• A bottom support plate must be used with all Atwood A-Frame cou-
plers (
FIG 5/6/7-D.)
• Weld completely around bottom plate follow
WELDING INSTRUCTION.
• Do not attach ground strap to latch during welding.
9
LITERATURE NUMBER MPD 87984
YOKE STYLE &
FLIP LATCH
COUPLERS
ENGLISH, FRANÇAIS (et Canada) •Installation •Operation •Maintenance
Effective 1/22/08
(7 paginas)
(2 paginas)
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