Hi-Force JAS Series User manual

INSTRUCTION MANUAL: Aluminium Jacks
Model Series: JAS, JAH
Hi-Force Limited –Prospect Way –Daventry –Northants NN11 8PL –United Kingdom
Tel: [phone]: Fax: [phone]: Website: www.hi-force.com
All Hi-Force JAS and JAH series jacks are supplied
from the factory pre-filled with oil, and are ready for
use.
1.0 Inspection of the product upon receipt:
On receipt of the product, visually inspect the item
for any evidence of shipping damage. Please note
shipping damage is not covered by warranty. If
shipping damage is found notify the carrier
immediately and refrain from putting the product
into service. The carrier is responsible for repair and
replacement costs resulting from damage in transit
shipment.
2.0 Safety Precautions:
Read and follow all the instructions and safety
warnings carefully prior to use of the equipment.
Failure to do so could result in equipment damage
or failure of the equipment or personal injury. Hi-
Force will not be held responsible for any damage to
the equipment or personal injury resulting from
unsafe use of the product, lack of maintenance or
incorrect operation. If in doubt on the correct usage
of any Hi-Force equipment, contact your nearest Hi-
Force office or distributor. If the operator has not
been trained on high pressure hydraulic equipment
and its safe use consult your local Hi-Force sales
office who can offer you training courses for
operators.
All operators should ensure that all necessary
personal protective equipment as specified by their
employer is worn when operating any hydraulic
equipment. Safety shoes, safety glasses/ visor and
protective gloves should be worn at all times. All
relevant risk assessments should be completed prior
to use of the equipment.
Description:
This equipment is provided for the purpose of lifting
or lowering loads, or exerting a force, under the
control of a trained operator.
The equipment is supplied completely assembled
and ready for use. No service adjustments are
necessary or possible during operation.
An internal safety relief valve (factory set) is fitted
which limits the load that may be lifted to the
equipment rated load + 10% maximum.
Keep hydraulic Jacks away from flames and
direct heat.
Hydraulic Jacks must only be serviced by a
qualified technician.
To protect your warranty, only use Hi-Force’s
hydraulic oil.
Immediately replace any worn or damaged parts
using genuine Hi-Force parts only.
Model Series: JAS103, JAS105
Hi-Force JAS Jacks are despatched from the factory
pre-filled with oil, and are ready for use. They can be
used, if installed correctly, in any position, for
example sideways, upside down etc.
Hi-Force JAS Jacks are supplied in two model
options:-
JAS103 10tonne Capacity 75mm stroke.
JAS105 10tonne Capacity 125mm stroke.
There are two safety devices fitted as follows:
Pressure Relief Valve to prevent
overloading.
Steel stop ring to limit maximum stroke.
3.0 Operation.
TO LIFT OR PUSH LOAD
Using the Operating Lever Assembly turn Release
Valve Screw clockwise to close.
Put the Operating Lever into the Handle Socket and
operate pump. The piston will rise and lift the load.
When the piston reaches full stroke the stop ring
prevents the piston from rising further.
TO LOWER LOAD
Using the Operating Lever turn the Release Valve
Screw anti-clockwise to open. Opening the Release
Valve SLOWLY will control rate of lowering. Do NOT
overload Jack during lowering. The JAS jacks are
fitted with a return spring, so the piston will retract
even under no load.

INSTRUCTION MANUAL: Aluminium Jacks
Model Series: JAS, JAH
Hi-Force Limited –Prospect Way –Daventry –Northants NN11 8PL –United Kingdom
Tel: [phone]: Fax: [phone]: Website: www.hi-force.com
CARE AND STORAGE
Wipe the piston clean before lowering. When the
Hydraulic Jack is not in use store upright with the
piston retracted in a clean environment.
SAFETY WARNINGS!
ALWAYS raise the piston to the load.
DO NOTdrop loads onto the Jack.
ALWAYS support the base of the Jack when
in use.
NEVER go under load when only the Jack
supports it.
DO NOT attempt to lift a load greater than
the capacity of the Jack.
Provide solid and flat foundation for the
jack to operate from.
Make sure that there is sufficient spare
lifting capacity and stroke when selecting
Jack/s for any application.
Check the Jack load rating before use.
Avoid off-centre loading.
Before using any hydraulic equipment, read the
operating instructions carefully and check that they
are fully understood.
Model Series JAH –20tonne to 60tonne Capacity.
JAH1230C
JAH620SR JAH660
Hi-Force JAH range of lightweight Aluminium jacks
offer a wide variety of capacities and lift height
options. Available as either plain ram lifting jacks,
with or without ‘failsafe’ mechanical lock ring, or
optional low height claw lifting design. All models
are constructed of lightweight Aluminium with all
critical functioning parts from high quality steel.
This manual covers the following model variants of
Jack:-
JAH620,JAH1220,JAH630,JAH1230,JAH660,JAH1260
Jacks with plain piston only
JAH620C,JAH1220C,JAH630C, JAH1230C,JAH660C,
JAH1260C
Jacks with plain piston and lifting claw
attachment
JAH620SR,JAH1220SR,JAH630SR,JAH1230SR,
JAH660SR, JAH1260SR
Jacks with Failsafe locking ring.
Please read the following instructions carefully
before operating the product and keep them in a
safe place for future reference.
It is the responsibility of the purchaser to ensure that
operators are properly trained in the safe use of this
equipment and have access to HI-Force Operating
and Safety Instructions.
No modification and/or additions may be made to
this equipment without the written permission of the
manufacturer.
It is expected that the product is used by
competent technical personnel who have been
properly trained to use hydraulic lifting equipment
Description:
This equipment is provided for the purpose of lifting
or lowering loads, or exerting a force, under the
control of a trained operator.
The equipment is supplied completely assembled
and ready for use. No service adjustments are
necessary or possible during operation.
An internal safety relief valve (factory set) is fitted
which limits the load that may be lifted to the
equipment rated load + 10% maximum.
Before Each Use
Ensure that the jack is in good condition.
Check the external surfaces for absence
of mechanical damage and/or oil leaks. If
either is present do not use the equipment
and have it serviced.
Ensure that the external surfaces are dirt
free.
Check the oil level
GENERAL OPERATING INSTRUCTIONS
Place the jack on a firm level foundation
fully supporting the jack base, and if

INSTRUCTION MANUAL: Aluminium Jacks
Model Series: JAS, JAH
Hi-Force Limited –Prospect Way –Daventry –Northants NN11 8PL –United Kingdom
Tel: [phone]: Fax: [phone]: Website: www.hi-force.com
necessary place suitable material between
the load point and jack ram to avoid
damaging the structure to be lifted.
Use the jack by operating the lever in a
steady controlled movement at a
maximum of 30 strokes per minute.
Remove the operating lever when not in
use.
The ram should only be extended
hydraulically; it should never be pulled out
by hand or used to carry the jack.
SAFETY.
READ THIS MANUAL BEFORE OPERATING THE JACK.
FAILURE TO OBSERVE THE FOLLOWING WARNINGS
COULD RESULT IN SERIOUS BODILY INJURY.
Do Not position the jack by using the
operating lever in the release valve. If the
jack is to be placed some distance under
the load, use the operating lever in the
operating lever/quadrant socket to position
the jack.
Do not attempt to exceed the rated load
on the head or toe of the jack.
The maximum working load and the travel
of the hydraulic jack is marked on the
equipment,
In operation, never drop loads onto the
jack. Always raise the head/toe to the
load.
Always ensure the full base area of the jack
is supported when in use.
Always ensure that loads are applied
centrally to the ram, or to the full extent of
the claw.
DO NOT allow any persons to work under
the load, when it is only supported by
hydraulic jacks.
Always clean the ram and retract it after
use.
Always remove the jack operating handle
when not in use.
Do not use if there is evidence of oil
leakage.
Never extend the ram by any means other
than pumping the jack.
Inspect and clean the jack after every use,
but if subjected to abnormal or shock
loading inspect for damage immediately.
CHECKING THE OIL LEVEL.
The jacks are normally supplied filled and ready for
use. However before using the jack for the first time,
the oil level should be checked. The oil used should
be a high quality hydraulic oil of HVI ISO46 viscosity,
e.g. Hi-force HFO32.
Remove the dipstick (See figure 1) and check the
oil level. The maximum level is marked on the
dipstick. The level should be within 5mm of this
mark. The dipstick should be screwed fully into
position to determine this level.
OPERATION OF JACK. See Figure 1.
Note: The permissible working load and stroke
of the Jack are marked on the side.
The JAH series Jacks (1) have an in-built hydraulic
pump which is worked by means of an operating
lever (2), under the control of the operator. The
piston (3) is raised on each downwards stroke of the
lever. For lifting, the lever is placed fully into the
operating quadrant (4). Three positions are
provided to enable the user to choose the best
ergonomic position. For lowering, the piston the
lever is removed from the quadrant and placed
into the release screw (5). Turning this anticlockwise
will allow the piston to descend. The amount this is
rotated will control the speed of decent. Only open
a very small amount (approx. 5°) at first. Rotate
clockwise, hand tight after use, to ready the jack for
the next operation.
JACKS WITH LOCKING COLLARS (TYPE SR)
All models can be supplied with threaded
pistons and locking collars to mechanically support
the load without relying on the hydraulic circuit.
When the load is at the required position, rotate the
locking collar clockwise until it rest hand-tight on
the top of the jack body.
To undo –operate the jack so that the hydraulic
circuit just takes the load of the locking collar.
Rotate the collar anticlockwise until it reaches the
top of the piston.

INSTRUCTION MANUAL: Aluminium Jacks
Model Series: JAS, JAH
Hi-Force Limited –Prospect Way –Daventry –Northants NN11 8PL –United Kingdom
Tel: [phone]: Fax: [phone]: Website: www.hi-force.com
JACKS WITH LIFTING CLAWS (TYPE C)
Claws are supplied as an accessory to
provide a low height lifting point. When fitted, lifting
must always and only be carried out on the toe of
the claw. See Figure 2.
The capacity of the claw is 40% of the capacity of
the jack to which it is fitted. Lifting claws must NOT
be fitted to threaded piston jacks. Lifting claws must
only be used with jacks having extended bases that
extend under the toe of the claw. They must ONLY
be used for vertical movements of loads.
The recess on the underside of the top of the claw
fits around the top of the piston. The heel of the
claw rests against the front face of the jack. Ensure
that the claw is seated properly before use and
that the toe is as far under the load as possible.
OPERATING POSITIONS
The Jack should be used in the two positions shown
below, See Figure 3.
Figure 3
STROKE LIMITER
PISTON STROKE LIMITING DEVICE:
For Operator safety, all JAH jacks are factory-fitted
with a fail-safe positive stop mechanism that
prevents the over-stroking of the piston under
loaded conditions beyond its maximum stated
travel length. If the jack is operated in the over-
stroke mode, oil is by-passed back to the reservoir
to prevent the piston travelling further than its
designed stroke distance.
If pumping of the jack with the operating lever is
continued with the piston in the over-stroke
operation mode, some oil may by-pass the stop
mechanism and appear at the top of the jack. If
this occurs, cease operating the jack and wipe off
any surplus oil.
PLEASE NOTE: That if the over-stroke
mechanism is operated and continuously pumped
with the piston under no load conditions, insufficient
pressure is achieved in the system to engage the
by-pass system of oil to the reservoir, and within a
short number of pumping actions, oil will appear at
the top of the jack.
OPERATING ENVIRONMENT
The jack is intended for use in industrial
environments, in or outdoors between temperatures
of -20 to +50°C. Outside these parameters, consult
Hi-Force Ltd, before use.