MODEL G8720
31⁄2 TON
HIGH LIFTING JACK
INSTRUCTIONS
Specifications
Max. lifting load......... 31⁄2 u.s. tons (7000 lbs.)
required Minimum lifting load .............. 110 lbs.
Maximum lifting height..................................48"
To reduce the risk of serious injury when
using this jack:
1. Only use this jack for lifting and do not
exceed the design specifications.
top
Connecting
plate
Jack Bar
2. DO NOT alter any part of this jack
or use it for any purpose it was not
designed for.
3. DO NOT lift vehicles with curved or
tubular bumpers that will slip off the
lifting nose. Always position the lifting
nose under a flat, stable part of the
vehicle that will safely handle the load.
lifting nose
& assembly
Jack handle
Jack Base
4. Always stabilize and chock the load
before positioning the jack underneath
it.
5. Make sure the base of the jack is on a
flat, solid surface that can hold the load
and that will not allow the jack base to
slip.
Figure 1. Model g8720 identification.
6. NEvER place any part of your body
under a load lifted by this jack.
Overview
7. DO NOT push the load off the jack.
Lower the load slowly and carefully and
make sure all bystanders are clear of
the load.
the Model g8720 3-1/2 ton high lifting Jack
is designed to lift a load higher than the typical
automobile jack. the lifting assembly "walks" the
lifting nose along the jack bar using two climbing
pins that move in and out of the holes on the bar
as the jack handle is raised and lowered.
8. DO NOT use extension devices on the
jack handle.
Copyright © oCtoBEr, 2008 By grizzly industrial, inC.
WARNING: NO pORTION OF THIS MANUAL MAy bE REpRODUCED IN ANy SHApE
OR FORM WITHOUT THE WRITTEN AppROvAL OF GRIzzLy INDUSTRIAL, INC.
#ts11148 printEd in China
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B
a
To avoid serious personal injury or prop-
erty damage if the jack should fail under
load, NEvER operate the jack with worn or
damaged parts. Always thoroughly inspect
the jack before using it and perform regular
maintenance as instructed in this docu-
ment.
F
C
Maintenance
E
d
the jack may bind if the holes in the jack bar
are clogged or if the moving parts of the jack are
dirty, rusty, or without lubrication. always keep
your jack in good condition and perform regular
maintenance as described below to ensure safe
and efficient operation.
Figure 3. Model g8720 lubrication points.
A. direction latch pivot bolt.
b. Jack handle pivot bolt and pin.
C. shear bolt.
Lubrication
use a non-flammable solvent to clean the entire
jack, especially the holes along the entire length
of the jack bar, then apply a small amount of white
lithium grease to the moving parts referenced in
Figure 3 and the following descriptions.
D. Jack bar front and back edges.
E. Bottom climbing pin and spring.
F. top climbing pin and spring.
Note: Motor oil or other types of grease will gather
dirt and debris that will clog the moving parts of
the jack.
Storage
raise and clip the jack handle to the jack bar,
then store the jack in an upright position in a dry,
protected location.
If you need help with your new high lifting jack,
call our Tech Support at: (570) 546-9663.
g8720 31⁄2 ton high lifting Jack
-3-
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parts breakdown
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REF PART #
DESCRIPTION
REF PART #
DESCRIPTION
1
2
3
4
5
6
7
8
9
10
P8720001 TOP CLAMP-CLEVIS BOLT
P8720002 TOP CLAMP-CLEVIS
11
12
13
14
15
16
17
18
19
20
P8720011 BASE
P8720012 CLIMBING PIN SPRING
P8720013 CLIMBING PIN
P8720003 STEEL STANDARD (BAR)
P8720004 STEEL HANDLE W/COTTER PIN
P8720005 HANDLE SOCKET
P8720006 PIN
P8720014 CROSS PIN
P8720015 REVERSING SWITCH CAM BAR
P8720016 CAP SCREW W/WASHER
P8720017 REVERSING LATCH
P8720018 REVERSING SWITCH SPRING
P8720019 LARGE RUNNER
P8720007 HEX BOLT
P8720008 CONNECTING ROD
P8720009 SMALL RUNNER
P8720010 SCREW BOLT
P8720020 RUNNING GEAR ASSEMBLY
g8720 31⁄2 ton high lifting Jack
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