Harbor Freight Tools Automobile Accessories 67649 User Manual

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.  
 
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  
 
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  
For technical questions, please call 1-800-444-3353.  
SKU 67649  
 
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  
For technical questions, please call 1-800-444-3353.  
Page 5  
 
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  
For technical questions, please call 1-800-444-3353.  
SKU 67649  
 
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  
 
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  
For technical questions, please call 1-800-444-3353.  
SKU 67649  
 
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  
 
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 products 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  
For technical questions, please call 1-800-444-3353.  
SKU 67649  
 
SKU 67649  
For technical questions, please call 1-800-444-3353.  
Page 11  
 
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  
For technical questions, please call 1-800-444-3353.  
SKU 67649  
 

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