Jung JH 15 G-plus User manual

Operating Instructions
Read it before commencement please
Hydraulic Jacks JH G-plus Series
JH 5 G-plus
JH 10 G-plus
JH 15 G-plus
JH 20 G-plus
L x W x H
mm
311x233x280
Weight
kg
22
Capacity
kg
5500
Lifting height
mm
150
Workingpress.
bar
520
L x W x H
mm
330x247x310
Weight
kg
28
Capacity
kg
10000
Lifting height
mm
160
Workingpress.
bar
520
L x W x H
mm
415x300x310
Weight
kg
44
Capacity
kg
15000
Lifting height
mm
180
Workingpress.
bar
520
L x W x H
mm
435x330x340
Weight
kg
58
Capacity
kg
20000
Lifting height
mm
190
Workingpress.
bar
520
= with slide shoe guiding
RecommendedUse
Thesejacksaredesignedspecificallyforliftingheavyloadsvertically.
•They should only be used on solid level ground. Do not use on a
slope. The load must have a suitable strong pick-up point which will
accept the full surface of the lifting toe.
•The centre of gravity must be in the under half of the load
Do not exceed the maximum load recommended in this document
andshownontheidentificationplateonthejack.
•Always lower the jack slowly and carefully. Otherwise the guide of
thehousingmaybedamagedduetohighfrictionforces.
•Every other use than recommended must be avoid. The
manufacturer or supplier is not liable for any damage resulting from
improper use of the jack. Accidences resulting from improper use
aretheresponsibilityoftheuser.
Theseproductsarenotdesigned:
•Forliftingandmovingpeopleormobiledevices.
•For use in extreme environment (i.e. under hazardous, explosive,
flammableorcorrosiveconditions)
•Materials and lubricants used may not meet local food and
agriculturalindustryregulations
The user should read these operating and service instructions
carefully before attempting to use the jacks. Particular attention
should be paid to the safety instructions on page 8.

Operating instructions for all models
zwe
Recommendation:
Work in tandem with two jacks when lifting very large loads.
Use a JUNG central pump ( in picture A).
Attention:When working with two hydraulic jacks, fitted to a central
pump, please note that is only one hydraulic circuit i.e. the hydraulic fluid
can flow between the jacks. The jacks should be very carefully positioned
under the load, keeping in mind the location of the centre of gravity to
ensure stability and prevent the load from tipping over.
5. Working with JH 50 G-EX the steps 1+2 only can
be done usingexternal pump.
Operation
In purchasing the JUNG jack, you have made a wise decision. This small power
package makes your lifting and transport jobs child’s play.
The drawing on the left illustrates a possible combination for the ideal use of JUNG
equipment.
All units can be stored in a minimum of space, are easily transportable and are
therefore an indispensable help when travelling.
B
A
General Information
1. Lift loads. (moving pump lever up and down)
2. Lower loads. (loosen lowering screw)
3. Fitted in this way, the pump lever can be used as
4. a handle bar for castor-mounted jacks
The following description applies to the models:
JH 5 G plus, JH 10 G plus, JH 15 G plus, JH 20 G plus.
The special operational features of Model JH 15 G plus, JH 20 G plus is
described on page 7.
Retighten loweringscrewwhenjobcompleted!
Otherwise the next load will not lift.
For JH 50 G-EXan external pump is necessary.

Transport
Attention:
Transport only on flat and solid subsoil; when using a tractor
vehicle the tensile force and brake force must be attended.
D
Variation 1 The goods to be transported have floor clearance
1. Insert lifting toe in suitable hole on sliding column.
2. Fix it with holding bracket.
3. Align swivelling feet of the jack with goods to be transported.
1, 2, 3 Lift rear end of load step by step (in 30 mm steps), then pushing
the adjustable rear skate underneath.
4-5 Lower jack slowly and remove it.
Place the jack always on flat, solid subsoil:
Don’t forget:
Tightenlowering screwwhenjobcompleted!
F
6,7,8
L i f t f r o n t o f l o a d s t o b e t r a n s p o r t e d a n d p u s h t h e s t e e r a b l e
s k a t e u n d e r n e a t h .
9, 10
Lower jac k a n d r e m o v e i t .
Don’t forget:
Tightenlowering screwwhen job completed!
E
C

Variation2 Goods to be transported have no floor clearance.
H
I
G
Place the lifting toe of your jack under a suitable place of the loads
to be transported. ( e.g. Picture G)
1
Swivel feet of the jack to the side
2, 3
Lift loads to be transported slightlyand insert a strong packing
piece underneath (e.g. steel, hardwood).
4, 5
Now you can place the lifting toe under the loads to be transported
and swivel the feet of the jack underneath the load.
6, 7, 8
Lift loads more, remove the packing and drive the steerable
carriage underneath the load.
9, 10
Lower jack and remove it.
Don’t f o r g e t :
Tightenlowering screwwhenjobcompleted!
Working with JH 50 G-EX the steps 6 and 9 only can
be done on the external pump.

Operating Instructions for JH 15 G-plus / JH 20 G-plus
General Information
OPERATION
Load lifting quick lifting
The jacks JH 15 G plus und JH 20 G plus lift heavy loads through an
inbuilt hydraulic pump unit.
Due to the power ratio the lifting piston raisesthe load slowly.
A fast stroke is provided to bring the toe to the underside of the load to
be lifted.
Fast stroke: big piston surface => for fast toe positioning without load
Load lifting: small piston surface => for lifting under load
1. Quick lifting:Raise quick-lifting toe until it touches the bottom of
the load.
2. Lift the load: Insert pumplever into the other pump rod
assembly for load lifting.
3. Lowertheload:Loosen lowering screw slowly and carefully.
Tighten lowering screw

Additional Notes, Safety Instructions
SAFETY WORKING INSTRUCTIONS
1. Read instructions
Before the jack is used, these instructions must be read in their entirety by all
operating staff (i.e. all personnel who have received instructions to carry out the
liftingandtransportoperations).
2.Communicationand organisation
The communication between all operating stuff must be guaranteed, especially
when the visibility between each other is interrupted. One non-operating person
hastoberesponsibleforcontrolandclearadvicetoalloperatingpersonnel.
3. Danger Zone
The operatormust ensure thatotherpersonsshould remainatasafedistanceof
1.5 times the height of the load (i.e. clear of the danger zone). No unauthorised
personoranyonenotfamiliarwithitsoperationshouldattempttousethejack.
4.LoadandCentre ofgravity
The complete netweightandthepositionof the centre of gravity of theload have
tobefoundoutbeforeanyoperation.
Use of jacks and hydraulic pumps without knowing these facts is dangerous and
can be lead to damaged equipment and/or damage to the load and operating
personnel.
Thechoice ofanadequatejackcanbedonewiththisformula:
Minimumjackcapacity=(Loadweightinkg)x1. 25(securityfactor)
(I.e. load weight 4000 kg x 1.25 = 5000kg; the jack must have a minimum
capacityof5000kg.)
While using more than one jack with one load it is important that the jacks are
placed undertheload inpositionswhere itisguaranteedthatall ofthem will have
to lift the part of the weight. Therefore the part of the load plus security factor
must not exceed the capacity of the single jack. In order to place the jacks
correctly as requested it is absolutely necessary to know where the position of
thecentreofgravityislocated.
Lowering the jackswithout acentralpump the lowering speed hastobe slow and
absolutely synchronised on all jacks deployed. Forsecurity purposeuse of Jacks
withdifferentcapacitiesisn’tallowed.
5. Recommended use
These jacks are designed specifically for lifting heavy loads vertically. They
should be used on solid level ground only. Do not use on a slope or slippery
ground.
The loadmust be stable enough for lifting on a single pointand must not be tip
overwhile lifted.Thesurfacewherethejackwill beattachedmustbe suitablefor
lifting referring size, stability and non-slippery. Size means that there must be
enough room to lift up with the full surface of the lifting toe or top plate, only
partial connectionbetween the lifting surface ofjack and load is not enough.For
workingwith2ormorejacks werecommend theuse ofa centralpump whenthe
weight of the load:
1. exceedsthecapacityofonejackformorethen1.5x or
2. theheightofthe load exceedsthelengthof the sideoftheloadwhich is to
belifted.
While working with more than one jack the knowledge of the centre of gravity
determinesthepositionofthejacks. (See 4above“loadandcentreofgravity”).
Important: If the height of the load exceeds the length of the side being lifted
and/or the centre of gravity is located in the upper half of the load appropriate
precautionsmustbetakentopreventtheloadfromtipping.
6. Liftingandlowering:
After preparing the a.m. steps the initial lifting should be done slowly and
carefully.Examine the load carefully after the first few mm of lift to ensure there is
no exceptional slipping or bending in the load. If this safety check is done, the
liftingoperationcanbecontinued.
Whenthejackisintheraisedpositionundertheload:
-No-one should attempt to work on or in the close vicinity of the load or
handleundertheload.
-The jack should not be left unattended when supported on the raised
jack.
-No unauthorised person oranyone notfamiliar with its operation should
attempttousethejack.
7. Liftingheight:
For security reasons the load has to be lifted and lowered step by step. Steps
causing more than 30 mmsofheight difference on one side have to be avoided.
Use suitable pads, i.e. hard wood or steel to secure the load when changing the
side. For your own safety do this when lifting tall loads with a high centre of
gravity.
PROTECTIVE EQUIPMENT
All members of operating personnel must wear safety footwear with steel
toecaps.
SAFETY MECHANISM
Each jack is fitted with a safety valve which restricts the permissible operating
pressure of its internal pump to 520 bar, thus limiting themaximum load to the
weightpermissibleforthedeviceinquestion.
WARNINGS
When working with 2 or more hydraulic jacks and 2 or more hydraulic pumps
on one load there is a danger that individual jacks could become overload and
damaged if lowering is performed unevenly. This could resultin the load being
dropped suddenly or tipped over, creating considerable risk of personal injury
totheoperatoraswellasriskingdamagetotheloadandanythingelse inwithin
the dangerzone.
It is of the utmost importance when working with a jack and while lowering the
load, that no part of the jack other than the lowering screw is touched. When
using single or multiple jacks neitherthe operator noranyone else shouldallow
any body part to enter the area beneath the load, beneath the lifting toe or
close to the jack body and slidingcolumn.When loweringthe load, the toe and
sliding column move in relation to the body of the jack and the floor, clothing
and operator’s body parts could be trapped and personal injury result if proper
caution is not exercised.
GENERAL SAFETY INSTRUCTIONS
Forsafeworkingitisnecessaryto knowthelocalgeneralsafetyregulationsof
your country. Furthermore you have to pay attention to the regulations
dependingtoyourbranchofindustry,operationalareaandoperationpurpose.
Jung-Equipmentisdesignedforuse underusualatmospherically conditions
andtemperaturesbetween-5° and 45° C.
AlloperationalpersonnelworkingwiththeJUNGequipment must beinstructed
regularlyinsafeworkingconditionsbyasecurityinstructororasafetyexpert.
Thismustbedonepersonallyastraining,deliveryofwritten regulationsor
manualsand/orannouncementonsignsisnotenough.
Beforeeachuseofthejackyoumustcheckthatitisingoodworkingcondition
andavalidinspectionbadgeisonthejack.
Ifthereisnobadgeorthe jackseemsobviouslydefective,i.e. deformationsor
cracksinthemainhousing,wearoroilleaksonmovingparts,the jacksshould
beinspectedbeforeuseandavalidcontrolbadgehastobeputon.