Weight Distribution hitch
Model 67649
set up anD operating instructions
Visit our website at: http://www.harborfreight.com
read this material before using this product.
Failure to do so can result in serious injury.
saVe this Manual.
©
®
Copyright 2010 by Harbor Freight Tools . All rights reserved. No portion of this manual or any artwork
contained herein may be reproduced in any shape or form without the express written consent of
Harbor Freight Tools. Diagrams within this manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product described herein. Tools required for
assembly and service may not be included.
For technical questions or replacement parts, please call 1-800-444-3353.
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installation/attachment safety
operation safety
1. Assemble only according to these
instructions. Improper assembly can
create hazards. carefully measure
and follow all steps and adjustment
instructions.
1. Secure the Spring Clips (18) and adjust
according to this manual before use.
2. This product is not a toy. Do not allow
children to play with or near this item.
3. Use as intended only.
2. Raise the front of the trailer WHeNeveR
tension will be applied or released from
the Connection Brackets (3).
4. Inspect before every use; do not use if
parts are loose or damaged.
3. Adjust both chains to equal length.
5. Do not exceed hitch’s rated capacities -
see SpeciFicationS chart.
4. When applying or releasing tension
from the Brackets, use the Handle (5)
supplied and handle carefully.
6. Maintain product labels and nameplates.
These carry important safety information.
If unreadable or missing, contact Harbor
Freight Tools for a replacement.
5. the spring bars (4) Must be removed
if the trailer is not attached.
Check local regulations to determine if
other components can be left in place or
must also be temporarily removed.
7. Carefully load trailer according to trailer
supplier’s instructions, whether a weight
distributing hitch is used or not.
6. Wear ANSI-approved safety goggles and
heavy-duty work gloves during assembly.
8. Use according to DOT regulations.
service
7. Keep assembly area clean and well lit.
1. Have your hitch serviced by a qualified
repair person using only identical
8. Keep bystanders out of the area during
assembly.
replacement parts. This will ensure that
the safety of the hitch is maintained.
9. Do not assemble when tired or when
under the influence of drugs or
medication.
2. Do not use damaged equipment. If
abnormal noise or vibration occurs, have
the problem corrected before further use.
10. Install according to DOT regulations.
saVe these
instructions.
SKU 67649
For technical questions, please call 1-800-444-3353.
Page 3
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Weight
Distribution
head (2)
speciFications
entire System
1,000 lb. Tongue Weight
Capacity
10,000 lb. Gross Trailer Weight
Hitch Capacity
without Spring Bars
500 lb. Tongue Weight
5,000 lb. Gross Trailer Weight
spring
bar (4)
Shank Size
Class
2” Square
III & Iv
note: For greater stability, a Sway Control
Kit (ITeM 96462, sold separately) can be
used along with this Hitch.
3. Hold the Spring back while installing the
Spring Bar into the socket on the Weight
Distribution Head (2).
note: Limit capacities listed above by the
capacity of the towing vehicle and any
other attachment hardware used.
4. Release the Spring, and adjust the
Spring Bar until the spring snaps back
into place.
unpacking
When unpacking, make sure that all
parts listed on page 10 are included. If any
parts are missing or broken, please call
Harbor Freight Tools at 1-800-444-3353 as
soon as possible.
5. Pull on the Spring Bar to make sure
it is properly attached to the Weight
Distribution Head.
6. Repeat for the other Retaining Pin
Spring (2a) and the other Spring Bar (4).
installation
hitch ball
(sold
separately)
chain (7)
u-bolt (8)
read the entire iMportant
saFetY inForMation
section at the beginning of this
manual including all text under
subheadings therein before set up
or use of this product.
Washer
note: For additional information regarding the
parts listed in the following pages, refer
to the Assembly Diagram near the end of
this manual.
(9)
lock
nut (10)
7. Remove the Lock Nuts (10) and
Washers (9) from the U-bolts (8). Place
a U-bolt (8) around the bottom link of
each Chain (7). Insert the threaded ends
of each U-bolt into the holes at the end
of each Spring Bar, as shown. Secure
with Washers (9) and Lock Nuts (10).
spring bar (4) installation
1. Apply some axle grease to the round end
of one Spring Bar (4).
2. Pry one of the Retaining Pin Springs (2a)
back, pulling the Bar Retaining Pin (2b)
outwards .
Page 4
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SKU 67649
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hitch ball installation
highest
setting
Install a properly sized and properly
rated hitch ball into the hole at the top of
the Weight Distribution Head (2).
square
shank (1)
Secure in place using the washer(s) and
nut(s) provided with the hitch ball.
Weight Distribution
head (2) installation
Weight
Distribution
head (2)
loWest
setting
1. Determine the required ball height:
a. Divide tongue weight by 200 for tow
vehicles with overload springs, divide it
by 100 for vehicles without overload
springs and multiply the result to
calculate tow vehicle ‘squat’:
3. Determine the attachment point of the
Weight Distribution Head (2) to the
Square Shank (1) according to the
needed connection height calculated
in step 1c. The Square Shank can be
turned upside-down if needed.
_______ lb. Tongue wt.
200 (if tow vehicle has overload springs)
or
–:
each hole is 1-1/4” of adjustment.
Insert one of the 3/4” Bolts (16) through
the lower hole to hold the Weight
Distribution Head (2) in place for now.
Thread a 3/4” Nut (12) onto the Bolt, but
do not tighten it yet.
100 (if tow vehicle has no overload springs)
= _______
X 1/8”
= _______ ” tow vehicle ‘squat’
b. Position trailer parallel
coupler
spacing
Washers
(13)
spacing
rivet (14)
toothed
Washer
(15)
to the ground on a
flat, level surface and
coupler
measure the distance
from the ground to the
top of the ball cup
and write it here:
height
Weight
Distribution
head (2)
ground
square
shank
(1)
_________ ” coupler height
c. Add the distance found in step 1a to
the distance from step 1b to get the
required ball height:
angle set
bolt (2c)
bolts (16)
______ ” tow vehicle ‘squat’ (step 1a)
+ ______ ” coupler height (step 1b)
4. Adjust the Spring Bars’ (4) angle using
the Spacing Rivet (14) and from 0 to 7
Spacing Washers (13) until the Spring
Bars tilt downward slightly (10-13°).
Loosen the Angle Set Bolt (2c) before
adding/removing Spacing Washers (13)
and tighten afterwards.
= ______ ” required ball height
2. Insert Square Shank (1) into tow vehicle
receiver. Secure it in place with the Lock
Pin (17) and the Spring Clip (18).
SKU 67649
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Page 5
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toothed
Washer (15)
connection bracket installation
bolt (16)
nut (12)
connection
bracket (3)
trailer and hitch
(sold separately)
square
shank (1)
1
/ ” bolts (6)
2
Weight Distribution
head (2)
connection
bracket (3)
5. After the angle is set properly, insert a
Bolt (16) through the upper hole in the
Weight Distribution Head (2), Toothed
Washers (15), and a Nut (12) as shown
above. Tighten securely.
1. Thread a 1/2” Bolt (6) into each
Connection Bracket (3) a turn or two.
Place the Connection Brackets (3) on
top of the trailer tongue with the Bolts (6)
facing inwards as shown above.
6. Tighten both 3/4” Nuts (12) to 260 ft-lb
of torque using a torque wrench (sold
separately).
2. Swing the Spring bars down under the
brackets, and pull the Chains straight up
with no twist. Position each Connection
Bracket directly above its chain.
3. Tighten the 1/2” Bolts (6) until they
contact the trailer and then 1/4 turn
more. Do not overtighten.
permanently installed
components are now in place:
1. Proceed to operation for final setup and
trailer attachment.
2. if trailer is not to be attached at this
time, the spring bars (4) Must be
removed:
Hold onto the Spring Bar while prying the
Retaining Pin Spring (2a) back, pulling
the Bar Retaining Pin (2b) outwards.
The Spring Bar should drop out of the
Weight Distribution Head (2).
Check local regulations to determine if
other components can be left in place or
must also be temporarily removed.
Page 6
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SKU 67649
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attachMent
read the entire iMportant
saFetY inForMation
handle (5)
section at the beginning of this
manual including all text under
subheadings therein before set up
or use of this product.
connection
bracket (3)
a: connect
chain to
hook
note: For additional information regarding the
parts listed in the following pages, refer
to the Assembly Diagram near the end of
this manual.
c: insert
clip to lock
spring
clip (18)
chain (7)
1. If Spring Bars (4) were removed, reinstall
them following steps 1 through 6 on
page 4.
2. While trailer is not connected, measure
the distance from front and rear bumpers
of towing vehicle to ground.
6. Connect Chains:
a. Connect the Chains (7) to the hooks on
the Connection Brackets (3).
Write here: _______ front to ground
_______ rear to ground
b. Slide Handle (5) over pin on Bracket
and rotate up completely to secure
Chain.
3. Lower trailer coupler onto hitch ball and
secure the trailer’s ball coupler in place.
c. Insert Spring Clip through bracket as
shown to lock chain in place.
4. raise the front of trailer and back of
the towing vehicle 3”.
d. Repeat for other bracket and chain.
both chains must be of equal length.
this will make mounting easier and
safer.
7. Lower the front of the trailer.
8. Re-measure height of front and back of
towing vehicle. Both should be lower
than the amounts written in step 2 by an
equal distance or up to 1” lower in back.
The chain lengths need be adjusted (by
releasing the Brackets and adjusting
each chain one link at a time) until that
measurement is achieved. verify that
the chains are adjusted to same length.
5. Swing the hooks on the Connection
Brackets (3) down.
note: the brackets will be under tension;
use the handle (5) supplied and
handle carefully to prevent injury.
raise the front of the trailer
WheneVer tension will be applied or
released from the brackets.
SKU 67649
For technical questions, please call 1-800-444-3353.
Page 7
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aFter use
1. Note the number of chain links used to
make reconnection to the same trailer
and load easier.
2. raise the front of trailer and back of
the towing vehicle 3”.
this will make disconnection easier
and safer.
note: the brackets will be under tension,
use the handle (5) supplied and
handle carefully to prevent injury.
3. Slide Handle (5) over pin on Bracket and
careFullY rotate down completely to
release Chain. Repeat for other side.
4. Disconnect trailer from hitch ball.
5. the spring bars (4) Must be removed
if the trailer is not attached:
Hold onto the Spring Bar while prying the
Retaining Pin Spring (2a) back, pulling
the Bar Retaining Pin (2b) outwards.
The Spring Bar should drop out of the
Weight Distribution Head (2).
Check local regulations to determine if
other components can be left in place or
must also be temporarily removed.
Page 8
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SKU 67649
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please reaD the FolloWing
careFullY
Maintenance anD
serVicing
THe MANUFACTUReR AND/OR DISTRIBUTOR
HAS PROvIDeD THe PARTS LIST AND ASSeMBLy
DIAGRAM IN THIS MANUAL AS A ReFeReNCe
TOOL ONLy. NeITHeR THe MANUFACTUReR OR
DISTRIBUTOR MAKeS ANy RePReSeNTATION
OR WARRANTy OF ANy KIND TO THe BUyeR
THAT He OR SHe IS qUALIFIeD TO MAKe ANy
RePAIRS TO THe PRODUCT, OR THAT He OR SHe
IS qUALIFIeD TO RePLACe ANy PARTS OF THe
PRODUCT. IN FACT, THe MANUFACTUReR AND/
OR DISTRIBUTOR exPReSSLy STATeS THAT ALL
RePAIRS AND PARTS RePLACeMeNTS SHOULD
Be UNDeRTAKeN By CeRTIFIeD AND LICeNSeD
TeCHNICIANS, AND NOT By THe BUyeR. THe
BUyeR ASSUMeS ALL RISK AND LIABILITy ARISING
OUT OF HIS OR HeR RePAIRS TO THe ORIGINAL
PRODUCT OR RePLACeMeNT PARTS THeReTO,
OR ARISING OUT OF HIS OR HeR INSTALLATION
OF RePLACeMeNT PARTS THeReTO.
Procedures not specifically
explained in this manual must
be performed only by a qualified
technician.
to preVent
serious injurY
FroM acciDental
operation:
Disconnect hitch as explained
under AFTER USE before
performing any inspection,
maintenance, or cleaning
procedures.
to preVent serious injurY
FroM hitch Failure:
Do not use damaged equipment.
if abnormal noise or vibration
occurs, have the problem
corrected before further use.
1. beFore each use, inspect the
general condition of the tool. Check for
loose hardware, misalignment or binding
of moving parts, cracked or broken parts,
damaged electrical wiring, and any
other condition that may affect its safe
operation.
2. aFter use, wipe external surfaces of
the tool with clean cloth.
3. Inject axle grease into the grease
fittings on the Weight Distribution Head
(2) monthly if the Spring Bars are left
installed.
4. Before installing the Spring Bars (4),
clean and apply axle grease to the
rounded end.
SKU 67649
For technical questions, please call 1-800-444-3353.
Page 9
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parts list
part
1
2
Description
Qty.
1
1
Square Shank
Weight Distribution Head
2a Retaining Pin Spring
2b Bar Retaining Pin
2c Angle Set Bolt
2
2
1
2d Grease Fitting
2
3
4
5
6
7
8
9
Connection Bracket
Spring Bar (1000 lb. rating)
Handle
1/2" x 3-3/4" Bolt
3/8" Chain (9 links)
3/8" U-bolt
2
2
1
2
2
2
4
3/8" Washer
10 3/8" Lock Nut
11 Bushing
4
1
12 3/4" Nut
2
13 1/2" Spacing Washer
14 1-1/2" x 1-1/4" Spacing Rivet
15 Toothed Washer
16 3/4" x 4 1/2" Bolt
17 5/8" Lock Pin
7
1
2
2
1
18 Spring Clip
3
record product’s serial number here:
note: If product has no serial number, record month and year of purchase instead.
note: Some parts are listed and shown for illustration purposes only, and are not available
individually as replacement parts.
Page 10
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SKU 67649
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SKU 67649
For technical questions, please call 1-800-444-3353.
Page 11
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To take advantage of this warranty,
the product or part must be returned to us
with transportation charges prepaid. Proof
of purchase date and an explanation of the
complaint must accompany the merchandise.
If our inspection verifies the defect, we
will either repair or replace the product at
our election or we may elect to refund the
purchase price if we cannot readily and
quickly provide you with a replacement. We
will return repaired products at our expense,
but if we determine there is no defect, or that
the defect resulted from causes not within the
scope of our warranty, then you must bear the
cost of returning the product.
liMiteD 90 DaY WarrantY
Harbor Freight Tools Co. makes every
effort to assure that its products meet
high quality and durability standards, and
warrants to the original purchaser that this
product is free from defects in materials and
workmanship for the period of 90 days from
the date of purchase. This warranty does not
apply to damage due directly or indirectly,
to misuse, abuse, negligence or accidents,
repairs or alterations outside our facilities,
criminal activity, improper installation, normal
wear and tear, or to lack of maintenance. We
shall in no event be liable for death, injuries
to persons or property, or for incidental,
contingent, special or consequential damages
arising from the use of our product. Some
states do not allow the exclusion or limitation
of incidental or consequential damages,
so the above limitation of exclusion may
not apply to you. THIS WARRANTy IS
exPReSSLy IN LIeU OF ALL OTHeR
WARRANTIeS, exPReSS OR IMPLIeD,
INCLUDING THe WARRANTIeS OF
This warranty gives you specific legal
rights and you may also have other rights
which vary from state to state.
3491 Mission Oaks Blvd. • PO Box 6009
Camarillo, CA 93011 • (800) 444-3353
MeRCHANTABILITy AND FITNeSS.
Page 12
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