HAUL MASTER 631 Assembly instructions

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Owner’s Manual & Safety Instructions
Save This Manual Keep this manual for the safety warnings and precautions, assembly,
operating, inspection, maintenance and cleaning procedures. Write the product’s serial number in the
back of the manual near the assembly diagram (or month and year of purchase if product has no number).
Keep this manual and the receipt in a safe and dry place for future reference. 21a
When unpacking, make sure that the product is intact
and undamaged. If any parts are missing or broken,
please call 1-888-866-5797 as soon as possible.
Copyright© 2021 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 an d se rv ic e may n ot b e in cl uded.
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.

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Table of Contents
Safety ......................................................... 3
Specifications ............................................. 4
Installation .................................................. 5
Operation .................................................... 6
Inspection ................................................... 8
Parts List and Diagram .............................. 10
Warranty .................................................... 12
WARNING SYMBOLS AND DEFINITIONS
This is the safety alert symbol. It is used to alert you to potential personal injury hazards.
Obey all safety messages that follow this symbol to avoid possible injury or death.
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
Addresses practices not related to personal injury.
SAFETY OPERATION INSPECTIONINSTALLATION

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IMPORTANT SAFETY INFORMATION
TO PREVENT SERIOUS INJURY AND DEATH:
Basic Safety Information
1. Do not lift more than rated load. Be aware of
dynamic loading! Sudden load movement may
briefly create excess load causing product failure.
2. Do not operate hoist with twisted, kinked, or
damaged chain.
Inspect chain carefully before every use.
3. Do not operate a damaged or
malfunctioning hoist. Inspect hoist carefully
and test operation before every use.
4. Do not lift people or lift loads over people.
Falling loads can injure or kill people.
5. Do not operate hoist with anything
other than manual power (by hand).
6. Do not remove or cover warning labels and/
or tags. These carry important safety information.
If unreadable or missing, contact
Harbor Freight Tools for a replacement.
7. The warnings, precautions, and instructions
discussed in this instruction manual cannot
cover all possible conditions and situations
that may occur. It must be understood by the
operator that common sense and caution are
factors which cannot be built into this product,
but must be supplied by the operator.
Installation Specific Safety Information
1. The supporting structure the hoist is mounted
to (including trolley, monorail, or crane) must
be designed to withstand the loads and forces
imposed by the hoist for the rated load.
2. Install in location that allows the operator
to move and stay clear of the load.
3. Where the slack chain hanging from the hoist may
create a hazard, use an appropriate chain container
(not provided) to contain the excess chain.
4. Inspect the hoist as explained in Frequent Inspection
on page 8 after installation but before use.
Inspection, Testing, and Maintenance Specific Safety Information
1. Perform a “Frequent Inspection”
at least monthly, see page 8.
2. Perform a “Periodic (Thorough) Inspection”
at least yearly, see page 9.
3. More frequent inspections are needed
for hoists that are used heavily.
4. Raise test loads only to the minimum extent needed
and stay well clear of load at all times during testing.
Operation Specific Safety Information
1. Wear ANSI-approved safety goggles,
ANSI-approved hard hat, and steel-toed work
boots during setup and use.
2. This product is not a toy. Do not allow
children to play with or near this item.
3. Use as intended only.
Do not use to handle molten material.
Do not use for aircraft purposes.
SAVE THESE INSTRUCTIONS.
SAFETYOPERATIONINSPECTION INSTALLATION

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Specifications
Rated Capacity 4,000 lb.
Maximum Extension 10′
SAFETY OPERATION INSPECTIONINSTALLATION

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Installation Instructions
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.
Note: For additional information regarding the parts listed in the
following pages, refer to Parts List and Diagram on page 10.
1. The supporting structure the hoist is mounted to
(including trolley, monorail, or crane)
must be designed to withstand the loads and
forces imposed by the hoist for the rated load.
Figure A: — Correct and incorrect
suspension hook attachment
2. Properly seat the suspension hook on the
supporting structure at its intended load bearing
point (see the left side diagram of Figure A).
Do not allow the hook hitch
to support any part of the load.
Do not apply the load to the point of the hook
(shown in Figure A on the right side diagram).
SAFETYOPERATIONINSPECTION INSTALLATION

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Operation Instructions
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.
TO PREVENT SERIOUS INJURY: Operation of a vertical hoist involves more than pulling the hand
chain of a hand chain operated hoist. The use of vertical hoists is subject to certain hazards that
cannot be met by mechanical means, but only by the exercise of intelligence, care, common sense,
and experience in anticipating the motions that will occur as a result of operating the controls.
Before Operating Hoist
1. Familiarize yourself with all operating controls
of the hoist and with the operation(s) to be
performed. Instructions include, the warnings
on the hoist, and the safety and operating
instructions portion of this manual.
2. WARNING! TO PREVENT SERIOUS INJURY
FROM HOIST FAILURE:
Do not use damaged equipment.
If adjustments or repairs are necessary,
or any defects are known, have the
problem corrected before further use.
3. Do not operate a hoist with an out-of-order sign.
4. Only a qualified technician should
perform maintenance to the hoist.
5. Do not use the chain or rope as
a ground for welding.
6. Do not touch a welding electrode
to the chain or rope.
7. Only operate hand chain operated
hoists with hand power, with no more
than one operator per hand chain.
8. Designate a work area that is clean and well-lit.
The work area must not allow access by children
or pets to prevent distraction and injury.
9. There must not be objects, such as utility lines,
nearby that will present a hazard while working.
10. Inspect the hoist as explained in Frequent Inspection
on page 8 after installation but before use.
SAFETY OPERATION INSPECTIONINSTALLATION

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Operating Controls
Figure B: To Raise the Load
Supporting
Structure
Hook
Latch
Hand
Chain
Suspension
Hook
Pull
down
this
side to
raise
load
Load
Hook
Load
Chain
Figure C: To Lower the Load
Hand
Chain
Pull
down
this
side to
lower
load
SAFETYOPERATIONINSPECTION INSTALLATION

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Inspection, Testing, and Maintenance
Procedures not specifically explained in this manual must
be performed only by a qualified technician.
Frequent Inspection
Perform the procedures in this section BEFORE
INITIAL USE and AT LEAST MONTHLY. Inspection
is needed more often for heavily used hoists.
1. Check operating mechanisms for proper operation,
proper adjustment, and unusual sounds.
2. Frequent Braking System Inspection
The braking system must automatically
stop and hold up to the rated load if
the hand chain is released.
3. Frequent Hook Inspection
a. distortion, such as bending, twisting,
or increased throat opening
b. wear
c. cracks, nicks, or gouges
d. latch engagement (if equipped)
e. damaged or malfunctioning latch (if provided)
f. hook attachment and securing means.
4. Frequent Hoist Load Chain Inspection:
a. Test the hoist under load in lifting and lowering
directions and observe the operation of the
chain and sprockets. The chain should feed
smoothly into and away from the sprockets.
b. If the chain binds, jumps, or is noisy,
first see that it is clean and properly
lubricated. If the trouble persists,
inspect the chain and mating parts for
wear, distortion, or other damage.
c. Examine visually for gouges, nicks,
weld spatter, corrosion, and distorted links.
Slacken the chain and move the adjacent links to
one side to inspect for wear at the contact points.
If wear is observed or if stretching is suspected,
the chain should be measured as follows:
1) Select an unworn, unstretched length
of the chain (e.g., at the slack end).
2) Suspend the chain vertically under tension and,
using a caliper-type gauge, carefully measure
the outside length of any convenient number
of links approximately 12" to 24" overall.
3) Carefully measure the same number of
links in the used sections and calculate
the percentage increase in length.
4) If the used chain is 2.5% longer than
the unused chain, replace the chain.
5. Check rope or load chain reeving.
WARNING! TO PREVENT SERIOUS INJURY
FROM HOIST FAILURE:
Do not use damaged equipment.
If any defect or damage is noted, have the
problem corrected before further use.
SAFETY OPERATION INSPECTIONINSTALLATION

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Periodic (Thorough) Inspection
A qualified technician should perform
the procedures in this section
AT LEAST YEARLY. Inspection is needed
more often for heavily used hoists.
Remove or open access covers to
allow inspection of components.
1. First, follow all Frequent Inspection procedures.
Additionally:
2. Check fasteners for evidence of loosening.
3. Check load blocks, suspension housings,
hand chain wheels, chain attachments, clevises,
yokes, suspension bolts, shafts, gears, bearings,
pins, rollers, and locking and clamping devices for
evidence of wear, corrosion, cracks, and distortion.
4. Check hook retaining nuts or collars, and
pins, welds, or rivets used to secure the
retaining members for evidence of damage.
5. Check load sprockets, idler sprockets, drums,
and sheaves for evidence of damage and wear.
6. Check the brake mechanism for evidence
of worn, glazed, or oil contaminated friction
disks; worn pawls, cams, or ratchets; and
corroded, stretched, or broken pawl springs.
7. Check supporting structure or trolley,
if used, for evidence of damage.
8. Check warning label for legibility and replacement.
9. Check end connections of wire ropes or
load chains for evidence of wear, corrosion,
cracks, damage, and distortion.
10. Check the hoist and hoist mounting
lor evidence of missing parts.
WARNING! TO PREVENT SERIOUS INJURY
FROM HOIST FAILURE:
Do not use damaged equipment.
If any defect or damage is noted, have the
problem corrected before further use.
Storage Inspection
1. A hoist that is used in infrequent service,
which has been idle for a period of a month or more,
but less than a year, must be inspected
before being placed in service according to
the Frequent Inspection requirements.
2. A hoist that is used in infrequent service,
which has been idle for a period of a year or more,
must be inspected before being placed in service
according to the Periodic Inspection requirements.
Maintenance
1. Quarterly (every 3 months), clean off load chain,
then lubricate load chain links with lithium grease.
Apply grease to inner surfaces of load chain,
where the links rub against each other.
2. Repair or replacement of hoist components must be
performed only by a qualified technician using only
identical replacement parts with the same rating.
SAFETYOPERATIONINSPECTION INSTALLATION

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Parts List and Diagram
PLEASE READ THE FOLLOWING CAREFULLY
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.
Parts List
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. Specify UPC 792363006316 when ordering parts.
Part Description
1 Load chain
2 Suspension plate
3 Stay A
4 Load chain wheel
5 Drive shaft
6 Splined gear
7 Pinion shaft
8 Disk gear
9 Hand wheel
10 Brake seat
11 Friction
12 Roller gear
13 Bearing race
14 Ratchet disc
15 Hand chain
16 Pawl spring
17 Pawl
18 Hand wheel cover
19 Snap ring
20 Pawl pin
Part Description
21 Left side plate
22 Suspension plate
23 Suspension pin
24 Dam board
25 Snap ring
26 Pin
27 Guide roller
28 Steel sheath
29 Stay B
30 Hook hanger
31 Bent plate
32 Roller
33 Sheet cover
34 Shaft
35 Needle
36 Idle sheave
37 Hook holder
38 Hook
39 Latch kit
40 Double spring
SAFETY OPERATION INSPECTIONINSTALLATION

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Assembly Diagram
65
SAFETYOPERATIONINSPECTION INSTALLATION

26541 Agoura Road • Calabasas, CA 91302 • 1-888-866-5797
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 MERCHANTABILITY AND FITNESS.
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.
This warranty gives you specific legal rights and you may also have other rights which vary from state to state.