Curt Manufacturing 60607 User manual

1
CURT Manufacturing, LLC
6208 Industrial Drive
Eau Claire, WI 54701
888.265.5615 Phone
715.838.7524 Fax
www.curtmfg.com
Double lock
Gooseneck
InstructIon manual
Installer: Read and understand this manual. Fully instruct and demonstrate the operation of this gooseneck hitch to the end user.
Include the importance of observing all warnings. Provide this manual in its entirety to the end-user.

Curt Manufacturing LLC., warrants this product to be free of defects in material and/or workmanship at the time of retail purchase by the original purchaser. If the product is found to be defective,
Curt Manufacturing LLC., may repair or replace the product, at their option, when the product is returned, prepaid, with proof of purchase. Alteration to, misuse of, or improper installation of
this product voids the warranty. Curt Manufacturing LLC.'s liability is limited to repair or replacement of products found to be defective, and specifically excludes liability for incidental or
consequential loss or damage.
60607 GOOSENECK HITCH
FIGURE 1
Parts List
DESCRIPTION
PART NUMBER
QTY
ITEM
SAFETY CHAIN LOOP ASSEMBLYCM-C60-CLA21
2" x 3" SAFETY CHAIN LOOPCM-C60-CL11.1
U-BOLT SPRINGCM-C60-S21.2
NYLOCK HEX NUT
1_2 - 1321.3
FW,1/2 SAE,ZPFW12SAE
41.4
WASHER3/8"
22
FLAT HEAD C'SUNK CAP SCREW#10-32 x 3/4
33
NYLOCK HEX NUT#10-24 NYLOCK HEX NUT14
HEX HEAD FLANGE SCREW#10-24 x 1.25 HHFS1
5
TURNOVER BALL COMPLETECM-C60-B16
CAST LOCK PINCM-C600-CLP1
7
.375" HANDLE RODCM-C60-R18
7.5 LB COMPRESSION SPRINGCM-C60-CS
19
VINYL HANDLE GRIPCM-C60-H
110
RUBBER COVERCM-C60-RC
111
.300" U-SHAPED EDGINGCM-UE1
112
3.75 DIA. x .375" CHROME RINGCM-C600-CR113
TOP VIEW OF HITCH
BOTTOM VIEW OF HITCH
USE 60607 CENTER SECTION TO
LOCATE AND DRILL SAFETY
CHAIN ATTACHMENT HOLES
HIGH RIB SECTION
LOW RIB SECTIONS
HOLE LOCATION
FOR SAFETY CHAIN
ATTACHMENTS
USE AS NEEDED FOR
PROPER PULL LENGTH
WHEN BALL IS NOT IN
USE, INSERT SUPPLIED
RUBBER COVER
PAGE 2
8
10
11
9
2
6
1.1
1.4
1.3
1.2
2/26/2013
7
12
13
3
WARNING DO NOT invert ball when carrying
heavy loads on 2 wheel drive trucks. The ball may
hit the top of the differential,brake lines, or sensors.
(NOTE: Do not invert ball on any Toyota Tundra Models)
12
U-EDGING INSTALLED
AROUND EDGE OF 4" HOLE
IN TRUCK BED
5
4

Warning!! Carefully exam ine the location of fuel lines, brake lines, and electrical wires BEFORE INSTALLATION.
Brake, fue l, and electrical lines may n eed to be loosened or repositioned to provide clearance for ne w hardware. The
installation of this hitch m ay requ ire m odification or rem oval of heat shields. The u se of overlo ad springs, air bag s, etc.
m ay be required when towing heavy loads.
Installing 60607 T urnover Gooseneck After Cross Arm Sub-kit Installation
1) Install rubber edging (CM -UE1) on cut edge for 60607 cylind er, trim excess.
2) Position the 60607 over the rea r axle an d up to the rea r cross arm with the cylinder facing the correct
direction for the applica tion. Install four 1/2" x 1 3/4" carriage bolts into th e 606 07 first, the n throu gh the
rear cross a rm and se cure with 1/2" fla nge nuts, finge r tighten.
3) Mo ve the fro nt cross arm to the 60 607 and install the 1/2" x 1 3/4" carriage bolts into the cross arm then
through the 60607 and secure with 1/2" flange nuts.
4) Torque all 1/2" h ardware to 110 ft-lbs.
Installing Safety Chain Attachments
1) From under the truck use the 60607 gooseneck as a temp late to drill four 1/2” ho les for the safety chain
attachments.
2) Usin g a 1/2” drill bit, drill the center of each slotted ho le in the gooseneck. (Note: Be s ure the holes are
drilled in the lower rib section of the truck bed as shown in FIGURE 1).
3) From inside the truck box place the two U-bolts (1.1) through the predrilled holes in the bed of th e truck.
4) From beneath the truck place a washer (1.4), a spring (1.2), a washer (1.4) and a nylock n ut (1.3) on each
of the four U-bolt legs. Tighten the nylock nuts until flush with the bottom o f the U-bolt.
Installing handle / lock
1) Insert Locking Pin (7) into the ball cylinder with hand le rod ho le located on top.
2) Slide rubber grip (10) on to handle rod.
3) Insert handle rod from outside vehicle, through the hole in the 60607 end pla te, and through the rod guide
as shown. (Hand le rod may b e installed on driver side o r passenger side, depending on preference).
4) Slide the compression spring (9) over handle rod before insertin g the handle rod into the locking pin.
Insert handle rod into locking pin and secure with #10 screw (5) and nylock nu t (4) as sh own.
(Note: Use 1-2 additional 3/8” washers (2) as needed to ensure proper pull length of locking pin).
Caution!!!
1. Check that all 1/2" h ardware has been torqu ed to 110 ft-lbs.
2. Check that all side p late hardwa re has b een torqued. Some hardware listed will no t apply to your
application.
3/8" t o 45 ft-lbs.
1/2" t o 11 0 ft-lb s.
9/16” t o 150 ft-lb s.
5/8" t o 21 0 ft-lb s.
3/4" t o 38 0 ft-lb s.
3. Re-attach Brake, Fuel, an d Electrical lines so they do not contact any of the ad ded fasteners.
60607 Operation
1. Pull the handle out as far as po ssible and rotate clockwise until the locking p in is disengag ed a nd locked
out.
2. Insert ball in the tow position into the cylinde r by aligning the ball groove with the cylinde r p in. If the groove
and pin are not aligned sim ply rotate ball until the ba ll drops into place.
3. Rotate handle cou nter clockwise until locking pin snaps back in to position. (Note: Be certain the locking
pin passes completely through the ball and securely into the cylin der.
60607 Installation check
1. Set ball in towing positio n an d ha ndle in locked p osition.
2. Connect the trailer to the hitch ball.
3. Check truck b ox clearan ce, there should be a minim um clearance of 6" betwee n the bottom of the trailer
overhang and the top of the box sides. Verify clearance betwee n the truck and tra iler at cab and box
co rn ers.
Maintenance (Requ ired every 30 days or prior to use)
1. Keep hitch ball lubricated regularly. Use silicone spray or equivalent to prevent wear and rust.
2. Keep hitch assembly free o f dirt and other fore ig n deb ris.
3. Check for proper torque on all nuts and b olts before each use. Also check for excessive wear.
4. Check for ball wear before each use. (Note: Do not tow trailer with worn or damaged parts).
Curt Manufacturing LLC., warrants this product to be free of defects in material and/or workmanship at the time of retail purchase by the original purchaser. If the product is found to be defective,
Curt Manufacturing LLC., may repair or replace the product, at their option, when the product is returned, prepaid, with proof of purchase. Alteration to, misuse of, or improper installation of
this product voids the warranty. Curt Manufacturing LLC.'s liability is limited to repair or replacement of products found to be defective, and specifically excludes liability for incidental or
consequential loss or damage.
60607 GOOSENECK HITCH
PAGE 3

Curt Manufacturing LLC., warrants this product to be free of defects in material and/or workmanship at the time of retail purchase by the original purchaser. If the product is found to be defective,
Curt Manufacturing LLC., may repair or replace the product, at their option, when the product is returned, prepaid, with proof of purchase. Alteration to, misuse of, or improper installation of
this product voids the warranty. Curt Manufacturing LLC.'s liability is limited to repair or replacement of products found to be defective, and specifically excludes liability for incidental or
consequential loss or damage.
***DO NOT EXCEED VEHICLE MANUFACTURER'S RECOMMENDED TOWING CAPACITY.***
**REMOVAL OF REAR WINDOW ACCESSORIES MAY BE REQUIRED.**
CAB TO TRAILER CLEARANCE
TRAILER
LONG & SHORT TRUCK BEDS
***GENERALLY, TAPERED NOSE TRAILERS ADHERE TO THE FOLLOWING DESIGNS:***
8 FT. WIDE TRAILERS TAPER TO 6 FT. AT THE COUPLER.
7 FT. WIDE TRAILERS TAPER TO 5 FT. AT THE COUPLER.
96 in
96 in 72 in
***DO NOT USE THESE***
DIMENSIONS FOR DRILLING
***DO NOT USE THESE***
DIMENSIONS FOR DRILLING
CAB OF TRUCK CAB OF TRUCK
47 in
(X)
35 in
(X)
**WARNING REFERENCE CLEARANCE CALCULATOR BEFORE TOWING**
***IF (Z) IS POSITIVE, TRAILER WILL NOT INTERFERE WITH CAB OF TRUCK.***
IF (Z) IS NEGATIVE, TRAILER WILL INTERFERE WITH CAB OF TRUCK!!!
EXAMPLE: YOUR CALCULATION:
STANDARD TRAILER
X - Y = Z
35 - 36 = -1
(TRAILER WILL INTERFERE WITH CAB)
TRAILER WITH OVERHANG
[(X) - (W)] - Y = Z
[35 - 4] - 36 = -5
(TRAILER WILL INTERFERE WITH CAB)
(CAB TO BALL CENTER)
-
(COUPLER OVERHANG)
-
1/2 (TRAILER WIDTH)
=
(MINIMUM CLEARANCE
CLEARANCE CALCULATION
(CAB TO BALL CENTER) - 1/2 (TRAILER WIDTH) = (MINIMUM CLEARANCE)
(X) - (Y) = (Z)
IF THERE IS AN OVERHANG FROM THE COUPLER THEN THE EQUATION IS:
[(X) - (W)] - (Y) = (Z)
72 in
36 in
(Y)
4 in
(W)
HITCH BALL HITCH BALL
COUPLER
COUPLER OVERHANG
PAGE 4

Curt Manufacturing Inc., warrants this product to be free of defects in material and/or workmanship at the time of retail purchase by the original purchaser. If the product is found to be defective,
Curt Manufacturing Inc., may repair or replace the product, at their option, when the product is returned, prepaid, with proof of purchase. Alteration to, misuse of, or improper installation of
this product voids the warranty. Curt Manufacturing Inc.'s liability is limited to repair or replacement of products found to be defective, and specifically excludes liability for incidental or
consequential loss or damage.
60644 SUBKIT
8/22/2013
**DO NOT EXCEED RECOMMENDED VEHICLE TOWING WEIGHT!**
DRIVER SIDE WHEEL WELL
WARNING!! BRAKE, FUEL, AND ELECTRICAL LINES MAY NEED TO BE LOOSENED OR REPOSITIONED TO PROVIDE CLEARANCE FOR NEW HARDWARE.
ALL MODELS REQUIRE MODIFICATION OR REMOVAL OF HEAT SHIELDS. ON SHORT BED MODELS, CHECK FOR ADEQUATE TURNING CLEARANCE. BETWEEN
THE FRONT OF ALL TRAILERS AND THE TRUCK CAB.
BEFORE INSTALLING
For ease of installation the use of Curt Part # C-606 (Gooseneck Install Tool) is recommended. A lifting device, such as an
engine hoist, or cable come-a-long can also be used to lift the center section of the hitch into place. Use of one of these
tools will be especially helpful if the truck bed has been distorted downward from heavy use. After the hole is drilled in the
truck bed the rope or chain loop can be lowered through the drilled hole and attached to the center of the gooseneck hitch.
The gooseneck can then be raised so that the center ring protrudes through the bed floor. Maintaining the upward
pressure from the lifting device onto the gooseneck hitch will ease the process of attaching the gooseneck center section
to the crossarms. Remove lifting device before torquing hardware.
1. Mark the location for the hole in the truck bed. Measure from the tail gate end of the truck bed. Do this by hooking a tape
measure over the back of the truck box and marking the correct location. (NOTE: DO NOT MEASURE FROM EDGE OF
TAILGATE) Next, mark the center between the wheel wells. This marks the center point for the drill hole. This
hole location is critical for the correct installation of this hitch. Measure, mark, and saw carefully. This location will put
the ball 4"- 6" in front of the axle.
NOTE: If truck has a plastic bed liner, you may drill through both, but it is more difficult to accurately locate the midpoint
between the wells, and to keep the bed liner from moving while cutting the hole. Make a 4"(3 5/8" for the C-640)
hole at this location using a 4"(or 3 5/8") hole saw or by making a 4"(or 3 5/8") circle and cutting it out with a saber
saw equipped with a metal cutting blade.
2. The exhaust will need to be lowered on 2005 and newer trucks equiped with a
diesel engine. First remove the exhaust hanger located behind the rear tire on
the passenger side. This will be re-installed later.
3. Remove the heat shield which is located under the truck bed above the rear axle.
4. On 2004 and older trucks, the emergency brake cable located on the outside of the
driver's side frame will need to be relocated. Knock the mounting stud out of the
frame with a hammer and punch and discard. A 5/16" relocating bolt is included in
the kit and will be installed after the sideplates are installed.
On gasoline engine trucks, it may be necessary
to relocate a fuel line bracket. If the oval hole in
the driver's side framejust above the axle is
partially blocked, you will need to relocate the
bracket blocking the oval by removing the bracket
from the frame, rotating it 90°, then installing the
supplied fuel line bracket in the bolt kit with a 5/16"
carriage bolt. See FIGURE A
5. Some truck models will allow the crossarms to
slide between the frame and bed without
modification. If this is not possible, cut a small
notch in the flange on driver's side of the truck
as shown in FIGURE B. Locate the front bed
crossmember in the wheel well and measure
back from that.
FIGURE A
FIGURE B
VEHICLE FRAME RAIL
SUPPLIED FUEL
LINE BRACKET
MANUFACTURER'S
FUEL LINE BRACKET
SUPPLIED 5/16"
CARRIAGE BOLT
**IMPORTANT NOTE**
If truck bed has spray on bed liner, add 1/8" to 3/16"
when measuring location of center hole.
Page 1
99-CURRENT FORD 3/4 & 1 TON SUPER DUTY, 08' F-450
(WITH OR WITHOUT AFTERMARKET AIR BAG OVERLOADS)
WARNING!! ON TWO WHEEL DRIVE TRUCKS A CLEARANCE CHECK MUST BE PERFORMED WHEN TRUCK IS LOADED
AND UNLOADED TO VERIFY THE INVERTED BALL WILL NOT INTERFERE WITH THE TOP OF THE DIFFERENTIAL
1999-2010 MODELS:
LONG AND SHORT BED = 48 1/4"
(CENTER CYLINDER IN GOOSENECK OFFSET
TOWARDS FRONT OF VEHICLE)
2011 TO CURRENT MODELS:
LONG AND SHORT BED = 46"
(CENTER CYLINDER IN GOOSENECK OFFSET
TOWARDS REAR OF VEHICLE)
FLANGE BELOW BED
FLOOR ON DRIVER
SIDE WHEEL WELL
FRONT BED CROSSMEMBER
VEHICLE FRAME RAIL
7/8"
3/8"
1 1/2"
REAR DRIVER SIDE TIRE
APPROXIMATE TRIM LINE

Parts List
DESCRIPTION
PART NUMBER
QTY
ITEM
.125" FUEL LINE BRACKETCM-60644-FLB11
CARRIAGE BOLT5/16-18 x 132
HEX FLANGE NUT5/16-1833
CARRIAGE BOLT1/2-13 x 1 1/2
124
HEX BOLT1/2 - 13 x 1 1/2
45
CONICAL TOOTHED WASHER1/2
46
HEX FLANGE NUT
HFN 1213197
1/2-13 x 3 3/4 x 7 5/8 x 2 SQ U-BOLTCM-1213-UBS18
HEX HEAD BOLT-NC3_4 - 10 x 2 1/2 HEX29
FLAT WASHER3_4 FW210
HEX FLANGE NUT3_4 - 10 HFN211
60644 SUBKIT
Curt Manufacturing Inc., warrants this product to be free of defects in material or workmanship at the time of retail purchase by the original purchaser. If the product is found to be defective,
Curt Manufacturing Inc., may repair or replace the product, at their option,when the product is returned, prepaid, with proof of purchase. Alteration to, misuse of, or improper installation of
this product voids the warrant. Curt Manufacturing Inc.'s liability is limited to repair or replacement of products found to be defective, and specifically excludes liability for incidental or
consequential loss or damage.
Page 2
99-CURRENT FORD 3/4 & 1 TON SUPER DUTY, 08' F-450
(WITH OR WITHOUT AFTERMARKET AIR BAG OVERLOADS)
Installation Steps Continued
6. Install the rear crossarm (it has three notches). Slide the crossarm between the frame and bed on the driver's side. If
needed, use the notch cut out in Step 5. Make sure the leg of the angle with the oval holes is facing toward the cab and
slide the angle through until it rests on both frame rails. Next, using the notch over the shock bracket for clearance, roll
the angle iron over the bracket while sliding it toward the rear. Continue to slide it back until it is about four inches behind
the four inch hole in the truck bed. Next, install the front crossarm in the same way, except the leg of the angle with
the oval holes should face the rear of the truck. Slide it rearward slightly and leave it behind the shock bracket. This will
be left there until it is needed for installation.
7. If the emergency brake cable has been removed, place a 5/16" carriage bolt through the small square hole in the driver
sideplate, add a 5/16" flange nut loosely to hold in place. (See FIGURE C for orientation of bolt) This will be used to attach
the emergency brake cable bracket.
8. Install the "C" shaped mounting strap and side plate on the driver side of the truck. Take a mounting strap and position
around the frame approximately 6 1/2" in front of the slotted hole in the frame. (A U-Bolt will be used instead of mounting
strap on driver side of 2011 to current Ford Super Duty diesel) Next, take the sideplate and slide the bottom side between
the frame and the bottom of the mounting strap. Guide the stud through the hole in the plate and attach loosely with a 1/2"
flange nut. Place a 1/2" bolt with a conical toothed washer through the bottom of the mounting strap and hole in the sideplate
as shown in FIGURE C and attach loosely with 1/2" flange nut. Next, install 3/4" bolt and washer through hole in sideplate
then through the slot in the frame. Attach on backside of frame with a 3/4" flange nut. See FIGURE C for the orientation of
hardware for 2011 to current Ford to present Super Duty Diesel (It only varies on the driver side of this vehicle) and the
location of other hardware. Leave all hardware loose. Repeat process for passenger side.
**DO NOT EXCEED RECOMMENDED VEHICLE TOWING WEIGHT!**
WARNING!! BRAKE, FUEL, AND ELECTRICAL LINES MAY NEED TO BE LOOSENED OR REPOSITIONED TO PROVIDE CLEARANCE FOR
NEW HARDWARE. ALL MODELS REQUIRE MODIFICATION OR REMOVAL OF HEAT SHIELDS.ON SHORT BED MODELS, CHECK
FOR ADEQUATE TURNING CLEARANCE BETWEEN THE FRONT OF ALL TRAILERS AND THE TRUCK CAB.
SHOWN WITH C-600 (60607) INSTALLED
(NOT INCLUDED IN SUBKIT)
EXHAUST SPACER PLATE
EXHAUST SPACER MOUNT
REAR OF TRUCK
FRONT OF TRUCK
FIGURE C
USE THIS HARDWARE IN THIS
ORIENTATION FOR 2011 TO CURRENT
FORD SUPER DUTY DIESEL
USE U-BOLT
INSTEAD OF "C"
SHAPED MOUNTING STRAP
ON 2011 TO CURRENT FORD
SUPER DUTY DIESEL
(THIS SPACER IS ONLY USED
ON DRIVER SIDE OF 2011 TO CURRENT
FORD SUPER DUTY DIESEL)
5
1
7
5
11
10
79
4
2
8
3
NOTE: THE POSITION OF THE CENTER SHOWN HERE IS
FOR INSTALLATION ON 1999-2010 MODEL YEARS. THE
CENTER MUST BE ROTATED 180° FROM WHAT IS SHOWN
FOR INSTALLATION ON 2011 - CURRENT MODELS
6

Curt Manufacturing Inc., warrants this product to be free of defects in material and/or workmanship at the time of retail purchase by the original purchaser. If the product is found to be defective,
Curt Manufacturing Inc., may repair or replace the product, at their option, when the product is returned, prepaid, with proof of purchase. Alteration to, misuse of, or improper installation of
this product voids the warranty. Curt Manufacturing Inc.'s liability is limited to repair or replacement of products found to be defective, and specifically excludes liability for incidental or
consequential loss or damage.
60644 SUBKIT
**DO NOT EXCEED RECOMMENDED VEHICLE TOWING WEIGHT!**
9. Raise the center section in to position between the cross arms. The ball cylinder that protrudes from the top of the center
section must fit through the hole in the truck bed. Using (4) 1/2" carriage bolts and flange nuts, attach the center section
to the square holes in the front crossarm. Next, attach the rear crossarm to the center section using (4) 1/2" carriage
bolts and flange nuts. (Finger tighten only) Finally, bolt the sideplates to the crossarms using 1/2" bolts, washers, and
flange nuts. On 2011 to current models the cylinder in the center section needs to be rotated towards the back of bed.
10. With the sideplates installed on both sides, torque all 3/4" fasteners to 380 ft.-lbs. and 1/2" fasteners to 110 ft.-lbs, in the
following order:
First: Torque the center section to the front and rear crossarms.
Second: Torque the side plates to the truck frame on both sides.
Third: Torque the side plates to the front and rear crossarms.
11. Re-attach exhaust hanger. On 2005 - current Ford Super Duty trucks with diesel engines the exhaust will have to be
lowered slightly. There are two types of factory tail pipe mounts on the Super Duty. One uses a single bolt through the side
of the frame while the other uses two bolts, one through the side of the frame and one through the bottom of the frame.
Both factory mounts can be lowered with the use of the supplied exhaust spacer mount. (Refer to FIGURE D and E
below) 2008 - current Ford Super Duty trucks with diesel engines will need the supplied exhaust spacer plate added
to the center exhaust hanger. (Refer to FIGURE F and G below)
2005 - CURRENT MODEL TRUCK WITH DIESEL ENGINE
On 2005 to current Ford Super Duty with a diesel engine, the exhaust will have to be lower at the rear exhaust bracket to
allow clearance for the Turnover Ball Gooseneck Hitch. See FIGURE D AND E.
FIGURE D (EXHAUST MOUNTS WITH ONE BOLT) FIGURE E ( EXHAUST MOUNTS WITH TWO BOLTS)
2008 TO CURRENT MODEL TRUCK WITH DIESEL ENGINE
Re-positioning the exhaust at this location will allow adequate clearance around the exhaust pipe and improve ground
clearance at the end of the tail pipe. Use a deep well socket to loosen nuts on top of crossmember. Insert the supplied
exhaust spacer plate and tighten nuts. See FIGURE F AND G.
(REFER TO GOOSENECK HITCH INSTRUCTIONS FOR INSTALLATION AND OPERATING PROCEDURES)
Maintenance (Required every 30 days or prior to use)
1. Keep hitch ball lubricated regularly. Use silicone spray or equivalent to prevent wear and rust.
2. Keep hitch assembly free of dirt and other foreign debris.
3. Check for proper torque on all nuts and bolts before each use. Also check for excessive wear.
4. Check for ball wear before each use. (Note: Do not tow trailer with worn or damaged parts)
Page 3
99-CURRENT FORD 3/4 & 1 TON SUPER DUTY, 08' F-450
(WITH OR WITHOUT AFTERMARKET AIR BAG OVERLOADS)
Re-attach the factory tail pipe mount by
lowering and using a supplied 5/16"
carriage bolt and flange nut through the
lower square hole.
Use these two holes to attach the exhaust
spacer mount to the frame using a supplied
5/16" carriage bolt and the bolt removed earlier.
Place a supplied 5/16" carriage bolt through the
top square hole in the exhaust spacer mount and
attach to the frame. Secure with flange nut.
Re-attach the factory mount using the
bolts removed earlier in these two holes.
Remove from frame and place on the exhaust
spacer mount.
FIGURE F FIGURE G
VEHICLE CROSSMEMBER
CENTER EXHAUST HANGER SUPPLIED EXHAUST
SPACER PLATE
RATCHET WITH DEEP
WELL SOCKET

Curt Manufacturing Inc., warrants this product to be free of defects in material and/or workmanship at the time of retail purchase by the original purchaser. If the product is found to be defective,
Curt Manufacturing Inc., may repair or replace the product, at their option, when the product is returned, prepaid, with proof of purchase. Alteration to, misuse of, or improper installation of
this product voids the warranty. Curt Manufacturing Inc.'s liability is limited to repair or replacement of products found to be defective, and specifically excludes liability for incidental or
consequential loss or damage.
96 in 72 in
36 in
96 in or 98 in
72 in or 82 in
TRAILER
LONG & SHORT TRUCK BEDS
HITCH BALL HITCH BALL
(MEASURE) (MEASURE)
COUPLER
(X) (X)
(Y)
(CAB TO BALL CENTER) - 1/2 (TRAILER WIDTH) = (MINIMUM CLEARANCE)
(X) - (Y) = (Z)
IF THERE IS AN OVERHANG FROM THE COUPLER THEN THE EQUATION IS:
[(X) - (W)] - (Y) = (Z)
***IF (Z) IS POSITIVE, TRAILER WILL NOT INTERFERE WITH CAB OF TRUCK.***
IF (Z) IS NEGATIVE, TRAILER WILL INTERFERE WITH CAB OF TRUCK!!!
4 in
COUPLER OVERHANG
(W)
STANDARD TRAILER
X - Y = Z
35 - 36 = -1
(TRAILER WILL INTERFERE WITH CAB)
TRAILER WITH OVERHANG
[(X) - (W)] - Y = Z
[35 - 4] - 36 = -5
(TRAILER WILL INTERFERE WITH CAB)
***GENERALLY, TAPERED NOSE TRAILERS ADHERE TO THE FOLLOWING DESIGNS:***
8 FT. WIDE TRAILERS TAPER TO 6 FT. AT THE COUPLER.
7 FT. WIDE TRAILERS TAPER TO 5 FT. AT THE COUPLER.
CAB OF TRUCK CAB OF TRUCK
***DO NOT EXCEED VEHICLE MANUFACTURER'S RECOMMENDED TOWING CAPACITY.***
**REMOVAL OF REAR WINDOW ACCESSORIES MAY BE REQUIRED.**
***DO NOT USE THESE***
DIMENSIONS FOR DRILLING
***DO NOT USE THESE***
DIMENSIONS FOR DRILLING
EXAMPLE: YOUR CALCULATION:
(CAB TO BALL CENTER) ________
(COUPLER OVERHANG) ________
1/2 (TRAILER WIDTH) ________
(MINIMUM CLEARANCE) ________
Page 4
CAB TO TRAILER CLEARANCE
CLEARANCE CALCULATION
Table of contents