not become damaged and/or wet with oil or water.
4. Inspecting the carbon brushes.
The motor employs carbon brushes that are consumable parts; since an excessively worn carbon brush
could result in motor trouble, replace the carbon brush. Wear limiter (6) No of carbon brush (7).
Always keep carbon brushes clean and ensure that they slide freely within the brush holders.
Replacement steps
The carbon brush can be removed by removing the cap cover (9), cap rubber and brush cap in that order at
the interior
To replace carbon brush reverse order of removal
INSTALLING BITS
Never hold the chuck body with one hand and use the chisel power to the chisel body to loosen or
tighten bits. You may severely injure your hand.
ENVIRONMENT
Do not dispose of electric tools, accessories and packaging together with household waste material
- in observance of European Directive 2002/96/EC on waste of electric and electronic equipment and its
implementation in accordance with national law, electric tools that have reached the end of their life must
be collected separately and returned to an environmentally compatible recycling facility.
TROUBLE SHOOTING
Fault Symptom
Possible Cause
Out of service
Disconnection between plug and
power socket
shortcircuit in power supply
At switch-off
Loose switching contact
Burnout of stator or rotor coil
Wearout of carbon brush
Stator wiring disconnection
Disconnection between carbon
brush and commutator
Sluggish start-up, falling
Unsmooth running in mechanical
short of running speed
part
Low supply voltage
Motor damage
Excessive sparkling during
Underpressure in carbon brush
running
spring
Excessive wearout of carbon brush Replace carbon brush by reparier
Overvoltage in supply power
Disconnection between carbon
brush and commutator
Ring fire caused by shortcircuit in
rotor winding shortcircuit
Ring fire caused by shortcircuit in
commutator segment
Failed to reach rated power Electrocircuit overload due to
lighting device, public utility or
other electric appliances
Machine superheating
Electromotor overload
Insufficient motor cooling
6
Troubleshooting
Put plug in power socket
Repair and reconnection
Switch on
Replace switchboard by repairer
Replace stator or rotor by repairer
Replace carbon brush
Reconnection by repairer
Replace carbon brush
Check mechanical part by repairer
Regulate supply voltage
Replace electric motor by repairer
Replace carbon brush by reparier
Regulate supply voltage
Replace carbon brush
Check or replace rotor by repairer
Check or replace rotor by repairer
No use of public utility or other electric
appliances on machine-connected
electrocircuit
Overload protection
Dedust air outlet
GB
No hammering
Oilway blockup due to improper
lubricating oil replacement or
excessive adding lubricating oil
Nonstandard lubricating oil
Bounceback (rammer kicks
Oilway blockup due to improper
back piston ring)
lubricating oil replacement or
excessive adding lubricating oil
Spare parts list and drawing Please download files on www.maxpro-tools.com
Clear up residual oil stain inside oilcan,
replace standard lubricating oil with
required quantity
Replace lubricating oil or moderately draw
off lubricating oil
GB
7