WilTec JH95A User manual
Operation Manual
Jackhammer
Item number 62296
Illustration similar, may vary depending on model
Read and follow the operating instructions and safety information before using for the first time.
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Due to further developments, illustrations, functioning steps and technical data can differ
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The information contained in this document is subject to change without prior notice. o part of this
document can be copied or duplicated in another form without the prior written consent of WilTec
Wildanger Technik GmbH. The WilTec Wildanger Technik GmbH assumes no liability for any errors in
this user manual or the connection diagram.
Although WilTec Wildanger Technik GmbH has made every effort to make sure that this user manual
is complete, accurate and updated, errors cannot always be avoided. In the event of problems with
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Introduction
Thank you for purchasing this quality product. To minimize the risk of injury we urge that our
clients take some basic safety precautions when using this device. Please read the operation
instructions carefully and make sure you have understood its content.
Keep these operation instructions safe.
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Main Components
No. Name No. Name No. Name
1 Starter 2 Air filter 3 Tank cover
4 Oil tank 5 Level indicator 6 Grease Cap
7 Gearbox 8 Cylinder block 9 Chisel retainer
10 Locking bolt 11 Chisel 12 Exhaust pipe
13 Protective cover 14 Handle 15 Spark plug
16 Oil tank cap 17 Ignition 18 Gearbox cover
19 Ventilation
Safety Instructions
This product is a petrol-driven jackhammer, designed for compaction work and is therefore not suited
for the removal of larger rocks. Please make sure to carefully read the information and safety
instructions found within this instruction manual and adhere to them in order to ensure an ideal mode
of operation while at the same time minimising the risk of accidents. The instructions found in this
manual thereby do not replace rules and regulations applying at your workplace and instead
complement them. Keep this manual and make sure it is in reach when working with this product.
•This device can only be utilised by individuals with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, if they have received instructions
concerning the use of the appliance from and are being supervised by a person familiar with
the product and responsible for their safety. Children are not allowed to use the device and
should be supervised at all times in order to ensure that they do not play with it.
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•When using the Jackhammer, always make sure to wear antiskid footwear, safety glasses,
hearing protection as well as appropriate work clothes. Further, a dust mask and safety helmet
should be worn, if the Jackhammer is being operated for a longer period of time.
•Always operate the Jackhammer with both hands and make sure to have a safe stand at any
given point.
•Do not smoke while using the machine and do not operate it, if you are under the influence of
alcohol, drugs or medicine.
•Always start out at a slow pace and steadily increase the same in order to minimize the strain
on the Jackhammer as well as the risk of accident.
•Keep bystanders out of the Jackhammer's working area as its usage may cause fragments,
gravel or rubble to be flung around.
•A medium speed setting of 3 or 4 is recommended as it allows for ideal results to be achieved
•Do not apply pressure to the machine as it is used and instead utilize its own weight. High
efficiency and ideal results do not require expenditure of energy.
•Always make sure to keep the handles dry, clean and free from oil and fuel residue.
•Make sure to stop the engine whenever you take a break or finish working.
•Always ensure that all screws are tightened properly before each usage. If a screw should be
loose, make sure to tighten it before operating the device.
•It is prohibited to use pure petrol (without oil for two-stroke engines) as fuel for the
Jackhammer. Therefore, always make sure to stick to the mix ratio for petrol and two-stroke
engine oil found in this manual.
•The Jackhammer's fuel should only be replenished in well ventilated areas and far away from
ignition sources as petrol is extremely flammable. Always make sure to stop the engine and to
allow the machine to cool down before refuelling it. Be careful not to overfill the tank and do
not store the fuel tank close to the machine. If fuel should spill, remove the residue or wait for
it to volatilize before starting the engine.
•Always ensure to properly close the tank cap after fueling the Jackhammer and check the tank
cap as well as the tank itself for signs of damage or wearing. In case of the tank or its cap
being damaged or worn out, make sure to replace the affected parts before turning the device
on again.
•Only store fuel in areas without ignition sources that could cause fire, explosions or sparks.
•When using the Jackhammer in closed working areas, make sure use a sufficient supply of
fresh air in form of a fan, air pipe or smoke outlet as the exhaust fumes contain dangerous
carbon monoxide.
•Avoid rapid acceleration as well as abrupt deceleration as the strain of these drastic changes
in working speed might damage the device.
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Fields of Application and Features
Usage
1. For demolition and road work.
2. For breaking (corner) stones (for example for track work).
3. For excavating telephone lines.
4. For breaking frozen surfaces.
Features
1. Comfortable handling and ideal control due to the handle minimising vibrations.
2. The adjustable power setting regulates the speed and allows for the power output to be
matched to the task at hand.
Preparation
Assembly
1. Lubricate the chisel you wish to use.
2. Unlock the chisel retainer by pulling the locking bolt into the direction of the arrow and insert
the chisel into the retainer. Make sure the chisel has been inserted correctly and rotate it 180°
in order to fix it in place. After that close the retainer with the help of the locking bolt again.
3. Fill the fuel tank with two-stroke mixture and press the primer in order to supply the system
with fuel before then starting the motor.
Fuel
In order to guarantee a flawless mode of operation and extend the jackhammer's service life, it is
advised to use a two-stroke mixture with the following mixing ratio:
Condition Petrol: Machine Oil
Within the first 20 hours of working time 20:1
After 20 hours of working time 25:1
1. Do under no circumstances use pure petrol to fuel the jackhammer.
2. Only fuel or refuel the device in well ventilated places.
3. Do not overfill the tank and do not leave any fuel residue in the outlet. In case of fuel being
spilled, remove it appropriately or wait for it to evaporate before starting the engine.
4. Always make sure to properly close the fuel tank cap properly after fuelling/refuelling.
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Lubricant
We advise the use of 50g of special lubricant after 40 hours of continuous operation.
1. The Jackhammer offers a maximum lubricant capacity of 140ml, but it is advised to use a
maximum of 100 ml.
2. If the lubricant level should drop beneath the red mark of the lubricant level gauge, make sure
to refill it in order to guarantee the functionality of the tool. The lubricant level gauge should
thereby be checked every 30 hours of usage.
Lubricating
Loosen the grease cap with a spanner, remove it and fill the grease into the opening.
Starting
1. Before starting this device for the very first time, press the primer a few times in order to sup-
ply its system with fuel (figure 4).
2. Hold the hand grip with one hand and quickly pull the recoil start with the other until its cable
reaches a length of about 50 cm. Do not let the recoil start rebound freely and instead guide it
back in order to protect the starter.
3. Open the ventilation once the motor has been started.
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Application
1. Let the Jackhammer run at a low speed for the first 2-3 minutes after starting it in order to al-
low the machine to warm up.
2. Start utilising the device once the temperature is high enough (according to the required im-
pact energy) in order to achieve an ideal starting position and thereby reduce the strain placed
on the device and its parts.
Note:
When using the Jackhammer for the very first time, it should only be used at lower speeds for
the first 24 hours in order to extend its service life.
In order to achieve the best work results, it should be sufficient to operate the Jackhammer at
medium speed.
Stopping the machine
1. Let go of the acceleration switch and let the machine run in idle state for about 1-2 minutes.
2. Then halt the motor by pressing the red stop switch. (Figure 6)
Maintenance
Air filter
Regularly check the air filter. Accumulations of dust and dirt may block it and as a result reduce the ca-
pacities of the motor and damage the cylinder. In case of the filter being dirty, remove it and carefully
clean it with mild detergent and lukewarm water. Make sure that the air filter has dried completely be-
fore it is reinserted. If the air filter should show signs of wear or damage, repair it or replace it with a
new one. If working in especially dusty environments, the maintenance cycle has to be adjusted ac-
cordingly.
Oil filter
A clogged oil filter reduces the jackhammer's working speed as well as its power of impact and does
thereby not only affect its performance, but also increases the risk of the machine being damaged and
its operator being injured.
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Oil filter removal:
1. Open the fuel tank cap (Figure 7) with a metal hook (Figure 8+9) and carefully remove the oil
filter from the tank.
2. Removing the oil filter at the same time cleans the oil tank.
Carburettor
It is common for both, the oil tank as well as the carburettor to keep a certain amount of fuel residue.
Over the time this residue might cause the fuel line to get clogged, which will prevent the motor from
starting. It is therefore advised to completely remove the fuel from the jackhammer, if it is not used at
least twice a week. In order to completely remove the fuel from the system of the machine, utilise the
primer.
Spark plug
In order to guarantee a flawless mode
of operation of the engine, the distance
between the electrodes of the spark
plug should be between 0.5 and 0.7
mm. If the spark plug is dirty, carefully
remove accumulations of dirt with a
wire brush. (Figure 10)
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Exhaust pipe
Regularly perform maintenance on the exhaust pipe. Use a screwdriver in order to remove foreign
matter and impurities.
Lubricating the gearbox
Open the gearbox cover in order to lubricate the eccentric shaft. The eccentric shaft should be lubri-
cated in regular intervals.
Cylinder cooling fins
Regularly remove the dust from the cylinder cooling fins in order to ensure that the cylinder receives
sufficient cooling. This is especially important as the jackhammer is air cooled and the cooling effect is
gravely affected by the condition of the cooling fins. Clogged cooling fins might cause the motor to
overheat and the device to take severe damage in the process.
Lubricating the cylinder
50g of special lubricant need to be put into the cylinder after a total working time of about 50 hours.
Troubleshooting
Trouble starting the cold motor
Issue Solution
The spark plug is wet Let the spark plug dry
The spark plug produces sparks Replace the spark plug
Too much fuel absorption Reduce the fuel supply
Trouble restarting the device after an abrupt stop
Issue Solution
Fuel is leaking or the carburettor is blocked Add some fuel or clean the carburettor
The oil filter is clogged Clean the oil filter
Too much carbon accumulation Remove the carbon accumulation
Slow acceleration and loss of power
Issue Solution
Either the cylinder or the silencer is covered by
carbon accumulation.
Remove the carbon accumulation
The fuel line and/or the ventilation is clogged Clean the affected areas
The air filter is clogged Clean the air filter
The device works fine but the quality of the demolition is not sufficient
Issue Solution
The chisel is worn out Resharpen and reforge or replace the chisel
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Technical specifications
Motor type Single-cylinder engine, air cooling, 2-stroke
Model number JH95A
L x B x H (mm) 690 x 370 x270
Fuel Two-stroke mixture (petrol =25 parts, 2-stroke
oil:1 part) mixing ratio 25:1
Fuel tank 1.3 l
Weight 20.5 kg
Capacity 52 cc
Max. power output and speed 1700W / 9000 r/min
Max. torque and speed 2.5 .m / 5000 r/min
Impact frequency 700~1350 impacts per minute
Power of impact 20~55 J
Carburettor type H119-6A-00-210
Spark plug type BM6A
Starting system Recoil start
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Parts list
No. Description Amoun
t
No. Description Amount
1Recoil start handle 1 26 Right crankcase 1
2Screw M5x20 13 27 Gasket 1
3Elastic washer (5) 21 28 Fuel gasket 12x22x7 1
4Washer (5) 23 29 Bearing 6202 2
5Cap assembly 1 30 Woodruff Key 3x5x13 1
6Fuel return line 1 31 Fuel gasket 15x30x7 1
7Plug 1 32 Straight pin 5x10 2
8Fuel line 1 33 Left crankcase 1
9Filter 1 34 Screw M3x35 4
10 Level indicator 1 35 Magnetic rotor 1
11 Fuel tank 1 36 Pressure spring 1
12 Recoil spring 1 37 Brake shoe 1
13 Rope 1 38 Axial screw 2
14 Reel 1 39 Straight pin 2
15 Spring 1 40 Fan cover 1
16 Shifting claw 1 41 Washer 6 6
17 ut M8 2 42 Elastic washer 6 4
18 Pawl cover 1 43 Screw M6x25 4
19 Gasket 1 44 Screw M5x15 1
20 Piston 1 45 Screw M6x60 2
21 Circlip 2 46 Muffler 1
22 Piston pin 1 47 Gasket 1
23 Bearing washer 2 48 Ignition coil 1
24 Crank shaft 1 49 Connection cable 1
25 eedle roller bearing 1 50 Motor base plate 1
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51 Pan head screw 1 67 Throttle cover cap 1
52 Motor cover 1 68 Throttle cock 1
53 Spark plug cover 1 69 Rope accelerator 1
54 Cylinder 1 70 Throttle spring 1
55 Gasket 1 71 Throttle 1
56 Gasket 1 72 ut M5 1
57 Carburettor base
connector
173 Bolt M8x30 3
58 Screw M5x25 2 74 Washer 8 4
59 Carburettor gasket 1 75 ut M8 4
60 Carburettor 1 76 Release spring 4
61 Screw M5x50 2 77 Twistgrip 2
62 Filter net 1 78 Frame 1
63 Air filter seat 1 79 Stop button 1
64 Air filter cover 1 80 Washer 6 1
65 Screw M5x16 6 81 Screw M6x20 10
66 Washer 5 1 82 Bearing 6203 2
83 Gear shaft 1 96 eedle bearing 1
84 Shaft 1 97 Bearing cover 1
85 Circlip 40 1 98 Screw M8x20 1
86 Washer 40 1 99 Sealing plug 1
87 Intermediate gear 1 100 Tank cover 1
88 Bearing 6204 1 101 Gasket 1
89 Bearing plate 4 102 Gearbox 1
90 Screw M5x10 1 103 Flat gasket 1
91 Gear wheel 1 104 Connecting rod 1
92 Bearing 6202 1 105 Piston 1
93 Bearing cover 1 106 Damping ring 1
94 Bearing 6205 1 107 O-ring 1
95 Crankshaft 1 108 Cylinder liner 1
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109 Extruder barrel 1 121 Cylinder head 1
110 Washer 8 10 122 Spark plug 1
111 Screw M8x35 4 123 Screw M8x30 6
112 Gasket 2 124 Spring 1
113 Split ring 1 125 Washer 1
114 Damping ring 1 126 Soft washer 2
115 Gudgeon pin 1 127 Lock sleeve 1
116 Sleeve 1 128 Straight pin 4x18 1
117 Rubber cuff 1 129 Gearbox gasket 1
118 O-ring 1 130 Gearbox cover 1
119 Damping ring 1 131 Screw M6x16 6
120 Cylinder head gasket 1
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Disposal regulations
EU guidelines regarding the disposal of scrap electric appliances (WEEE, 2012/19/EU) were
implemented in the law related to electrical and electronic equipment and appliances.
All WilTec electric devices that fall under the WEEE regulations are labelled with the crossed-out
wheeled waste bin logo. This logo indicates that this electric equipment must not be disposed with the
domestic waste.
The company WilTec Technik GmbH has been registrated in the German registry EAR under the
WEEE-registration number DE45283704.
Disposal of used electrical and electronic appliances
(intended for use in the countries of the European
Union and other European countries with a separate
collection system for these appliances).
The logo on the article or on its packaging points out
that this article must not be treated as normal
household waste but must be disposed to a recycling
collection point for electronic and electrical waste
equipment. By contributing to the correct disposal of
this article you protect the environment and the health
of your fellow men. Environment and health are
threatened by inappropriate disposal.
Materials’ recycling helps reduce the consumption of raw materials.
Additional information on recycling this article can be provided by your local community, municipal
waste disposal facilities or the store where you purchased the article.
Address:
WilTec Wildanger Technik GmbH
Königsbenden 12 / 28
D-52249 Eschweiler
Important notice:
The reprint or reproduction, even of excerpts, and any commercial use, even in part of this instructions
manual require the written permission of WilTec Wildanger Technik GmbH.
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