Hi Lift Jack Workshop for 4x4 Offroad Vehicles

www.offroadjunkie.com
Hi Lift Jack Workshop
Dr. Tejas Kothari

Contents
What is a Hi Lift Jack
Different Types of Hi Lift
jacks
Parts of a Hi Lift Jack
Speciﬁcations
Safety & Handling
Uses & Application
Working mechanism
Accessories
Maintenance
Mounting on your vehicle
Other Manufacturers
Air Jack
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Hi Lift Jack
Versatile lever-operated mechanical jack capable of a lift of a
metre or more

Characterized by rugged, simple construction.
It comprises a steel beam with a series of equally spaced holes
along its length, and a hand operated mechanism which can be
moved from one end of the beam to the other through the use of
a pair of climbing pins.
Typical sizes for the farm jack are 4 feet, 5 feet and 6 feet, the size
referring to the length of the beam.
The jack's versatility stems from the fact that it can be used for such
applications as lifting, winching, clamping, pulling and pushing.

Synonyms
Farm Jack
Implement Jack
Railroad Jack
Vaporjack
Unijack
Jackall
Handyman Jack
Sheepherder's Jack
Long-beam ratchet jacks
The Widow Maker

History
Founded in 1895 by
the late Philip John
Harrah
First jack made in
1905
One of the oldest
family run companies
in the state of Indiana,
USA

Cast / Steel
Occasional offroad use
Black powder ﬁnish
3’, 3.5’, 4’ & 5’

All Cast
Regular offroad use
Red powder ﬁnish
3.5’, 4’ & 5’

X-treme
Extreme offroad use
Charcoal Metallic
powder ﬁnish
4’ & 5’
Clamping & Winching
attachment

First Responder Jack
Similar to x-treme
Bright colour
Fluorescent coating
Swivel base

Speciﬁcations
Weight
Rating

Weight
11.3 to 14.2 Kgs
Why is it important to know the weight?

Rated Load
The rated load is the heaviest load which a piece of
equipment has been designed to deal with.
Manufacturers determine the rated load. This is done in
part with the use of standardized equipment which has
known tolerances, and in part by testing the equipment to
see how much of a load it can bear or produce.
4660 pounds / 2113.74 kgs

Tested Load
Test loads is usually a percent of the rated load applied to
any equipment
The purpose of a mechanical load test is to verify that all
the component parts are ﬁt for task and loading it is
designed for.
7000 pounds / 3175.14 kgs

Winching: 5000 pounds

Clamping: 340 kgs

Basic Safety
Read the manual
Keep bystanders away
Inspect the jack
Gloves

Handling the jack
Weight
Position of reversing pin
Laying the jack down

Uses
lifting
winching
clamping
pulling
pushing
spreading
to change a tyre
to clear an obstacle
remove a object stuck in
the ground
to break and seat a tyre
bead
extricate during accidents

How does it work?

The lifting ratio is almost 30:1

Lifting
To change a tyre
To clear the diff / part resting on a rock
To lift a tyre to insert a traction aid
To escape a rut

Pre-Lift Procedure
Switch off the vehicle - engage parking brake
Check the jack
Safety protocols
Inspect the surroundings and do a stuck assessment
Chock the wheels
Identify lifting points

Inspect Surroundings
Will the vehicle become unstable
Will the vehicle roll off
Do i have an exit strategy - vehicle and yourself
Traction aids are ready
Do i have a ﬁrm base for the jack - slipping / sinking

Chock and Block
A chock is a wedge for steadying an object and holding it
motionless, or for preventing the movement of a wheel.
Which wheel to chock?
Chock the wheel opposite the end being lifted.

Lifting Points
Bumpers
Rock sliders
What not to use:
Tubular bumpers
Door Sills
Unrated Bumpers

Lifting procedure
Positioning the jack
Holding the jack
Lifting procedure

Grasp the handle ﬁrmly with both hands.
Carefully pump the handle up and down to raise the load.
Do not use an extension on the handle. Why?
The load will be raised on each down stroke of the handle.
Watch the load and the jack carefully. Stop lifting if either
one starts to move. Do not continue until it is safe to do so.
When the load is raised to the desired height, place the
handle in the upright position clipped to the steel standard
bar.
Stabilize the load

Lowering the load
Most dangerous part
Important! During lifting and lowering, the weight of the
load pushes up against the jack’s handle. If your hands
slip off the handle, or if the handle is horizontal when you
move the reversing latch, it may move up very quickly.
The jack must have a load of 150 lbs. or more to lower
step-by-step. Otherwise, the lifting mechanism will slide
down to the base plate, dropping your load. Ensure all
bystanders are clear of the load being lowered.

Be sure the handle is in the upright position clipped to the
steel standard bar before lowering the load.
Move the reversing latch to the down position.
Grasp the handle ﬁrmly with both hands. Carefully pump
the handle up and down to lower the load.
The load will be lowered on each up stroke of the handle.

Clamping
Loosen the standard top clamp-clevis bolt.
Turn the top clamp-clevis 90° to the steel standard bar,
and re-tighten the bolt.
Note: You can connect the top clamp-clevis anywhere
along the steel standard bar to use the jack as a clamp.
Operate the jack as you would for raising a load

Winching
Make sure the top clamp-clevis is in line with the steel standard bar.
Install one end of a chain or tow strap securely to the object to be
winched. Securely attach the other end of the chain or tow strap to
the top clamp-clevis of the jack.
Take another chain or tow strap and secure one end to a ﬁxed, stable
object. Attach the other end of the chain or tow strap to the large
runner on the jack (do not attach chain or shackle to bottom hole of
the large runner on the jack). If the ﬁxed object is a tree, follow “Tread
Lightly” principles and use a tree strap.
Operate the jack as you would for raising a load

Spreading

Breaking the tyre bead

Jack and Push
Reference: Ken Sibly The New Zealand 4 Wheel Drive Handbook.
Shoal Bay, 2004, page 183 Personal copy.

Accessories
www.hi-lift.com
DIYs / alternatives

Neoprene Jack Cover

Jack Protector

Handle Keeper

Lift-Mate

Off-Road Base

Off-Road Kit

Bumper Lift

Fix-It-Kit

Handle-All

Jack Mate

Mount Adapter

Self Recovery

Tip # 1
You can use the hi lift handle to straighten out a bent
steering rod.

Tip # 2
Use a shovel to
reposition your
tyre.
!

Tip # 3
Which Gloves?
Why?

Ideal Glove

Maintenance
NEVER PERFORM MAINTENANCE ON THE JACK
WHILE IT IS UNDER LOAD.
Cleaning
Air pressure, water pressure, or a stiff brush to clean.
Use a non-ﬂammable cleaning solvent or another
good de-greaser to clean the jack.
Remove any existing rust, preferably with a
penetrating lubricant

Binding
If the climbing pins start to bind in the holes of the
standard bar the jack will not operate properly and
safely. Rusty climbing pins, dirt, or worn bar can be
causes of binding.
Clean and lubricate the lifting mechanism. Test the
jack by lifting it up without a load. If the binding
continues, send it for repair. If the jack binds while
under a load, use a jack with equal or larger load
capacity to lower the load safely to the ground. After
unbinding the jack clean, lubricate and test.

Storing the Jack
Place the handle in the upright clipped position against
the steel standard bar.
Raise the reversing latch until it locks in the up position.
Store in the upright clipped position in a dry location,
preferably indoors.

Why not to use grease?

Mounting on your vehicle
Bumper - vertical or horizontal
Roof Rack
Roll bar
Hood
Inside
Tyre Mount

Roof Rack

Roll bar

Tyre Mount

Alternative - Air Jack

Air
Jack High-‐li.
Used
when
engine
is
running Used
without
engine
running
Used
on
almost
any
vehicle Needs
accessories
or
jacking
points
Wont
sink
in
so.
ground Needs
base
to
prevent
sinking
More
stable
less
versaAle Less
stable
very
versaAle
Cannot
be
used
as
a
winch Can
be
used
as
a
winch
Cannot
be
used
as
to
jack
and
push Can
be
used
to
jack
and
push
Dust
and
sand
does
not
aﬀect
operaAon Dust
and
sand
can
jam
mechanism
Useless
if
punctured Reliable
if
properly
maintained
Small
punctures
may
be
patched Spares
available

Other Manufacturers
Reese
Larin
Jackall

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Hi Lift Jack Workshop for 4x4 Offroad Vehicles

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