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Customer Support
Hammer drill
Symptoms of failure Affected parts Method of inspection Cause of failure Recommended action Recommended action
Operation out of control (disconnected) Switch Check the switch ON/OFF and contact (connection) Mixing in of foreign matter Cleaning and removing foreign matter Air cleaning
Decrepitude (exceeded the endurance limit) Exchanging the switch Exchanging the switch
Damage due to impact
Damage due to fall
Point of contact failure
Code Check whether the code is disconnected Disconnection occurred due to abnormal tension of the part of code clip when moving Modifying and replacing the code section Replacing the code
Phenomenon of code being gnawed due to misuse during operation
Switch connection Check whether the switch is connected in order Lead wire breakaway caused by assembly failure Reconnecting as shown in the picture connecting failure Switch connecting picture/exchanging
Connection failure
Change lever Check whether the change lever operated smoothly External impact Exchange Change lever exchange
Damage caused by operation of the change lever during product rotation
Retainer Check whether the retainer operated well External impact Exchange Exchange the retainer
Quality problem of the material
Abrasion due to exceeded endurance limit
Amateur Check if the amateur coil is disconnected Coil burn-out thermic in overload due to excessive operation Replacing the amateur Exchanging the amateur
In case of operation exceeding the rated using time
Coil damage due to entry of foreign matter Cleaning and replacing
Stator Check the disconnection/burn-out of the stator coil Burn-out stator due to overload caused by excessive operation Replacing the stator Exchanging the stator
operation exceed the rated using time
Coil damage due to entry of foreign matter Cleaning and exchanging
Damage of stator lead wire connection part
Carbon brush Check if the carbon brush is able to connect with the amateur commutator part Operation exceeding the carbon abrasion limit line Replacing the carbon brush Exchanging the carbon brush
Spring operation failure due to assembling failure
Amateur commutator part contact failure due to entry of foreign matter into the brush holder Cleaning and exchanging
Interference Amateur, Stator Check the amateur and stator for interference In case the stator's left and right volt clamping force is inappropriate Modifying and replacing Exchanging the amateur,stator
Spring operation failure due to assembling failure
Bearing In case of bearing abrasion and damage in case of abrasion and damage due to using exceeded bearing part's endurance limit Replacing the bearing Exchanging the bearing
Brush holder Check if the brush holder is duly reached Assembling failure Exchanging Exchanging the brush holder
Brush holder damage
Processed goods Check the processed goods bearing's duly reaching part for abrasion (gear cover, housing, cylinder case, crank case) In case of abrasion of bearing injection part due to exceeded endurance limit of each processed good Separate replacement in case of abrasion on each part Separate replacement in case of abrasion on each part
Inappropriate bearing injection part's distance between shelves
Shaking Amateur Check the A/R shaft for bending and puncture Fan damage and puncture of shaft during repair Replacing the amateur Exchanging the amateur
Check the amateur fan for damage Change the shape (environment)
Check the balance Shaft fan injection part knurling brasion
Bearing Check the bearing for wear and damage In case of bearing wear due to decrepitude Replacing the bearing Exchanging the bearing
In case of bearing damage
Processed goods Check the processed goods bearing's duly reaching part for abrasion (gear cover, cylinder case, crank case, housing) In case each part's processed goods are decrepit Separate replacement in case of abrasion on each part Separate replacement in case of abrasion on each part
Inappropriate bearing injection part's distance between shelves
Piston, Driving Shaft Check whether the driving Shaft duly reached the piston Piston processing failure Exchanging Exchanging the piston
Bending due to external impact
Assembling failure
Spindle Check the spindle size Processing failure Exchanging Exchanging the spindle
Abrasion of drill bit duly reaching part
Piston, connecting rod Check whether the piston and the connecting rod are operating well Piston processing failure Exchanging Exchanging the piston
Bending due to external impact
Assembling failure
Drill chuck Check drill chuck damage and balance being damaged by external impact Exchanging the drill chuck Exchanging the drill chuck
Decrepitude due to exceeded endurance limit
Flame Failure Flame caused by Carbon brush Carbon brush's shaking an external diameter of commutator being scratched phenomenon and transforming Replacing the amateur Exchanging the amateur
Severe carbon brush damage and abrasion Exceeded the abrasion limiting line Replacing the amateur/ carbon brush
Carbon brush spring elasticity lose flame due to using the fixture
Flame caused by Overheating Check the amateur and the stator are contacted Burn-out due to overload Exchanging the amateur and stator Exchanging the amateur and stator
case concentricity failure replacing case exchanging case
Flame caused by shaking Check the bearing for damage bearing damage due to entry of foreign matter Replacing the bearing Exchanging the bearing
Check the condition of the gear worn out abrasion caused by overload of the gear part gear, final pinion exchanging pinion
coated films loose(transform) occurred assembling failure Exchanging the gear
Amateur flame Check the rough degree of the commutator surface an external diameter of commutator being scratched phenomenon and transforming Replacing the amateur Exchanging the amateur
Check whether or not the abrasion of the commutator surface amateur balance failure
Check whether or not the amateur coil is disconnected amateur turning failure
Check amateur coil insulating paper damage insulating paper damage caused by foreign matter(dust)
Flame caused by Stator Check whether or not the stator coil worn out Burn-out due to overload Replacing the stator Exchanging the stator
Check the stator coil insulating paper for damage
Damage (broken) Amateur fan Check the amateur fan for damage(shaking measuring) foreign matter inserting in using Replacing the amateur (check with the naked eye) Exchanging the amateur
Check for damage with the naked eye shape transforming(environment) in releasing
amateur commutator Check the amateur commutator part for damage In using privately made goods Replacing the amateur(check with the naked eye) Exchanging the amateur
in case of exceeding the term of guarantee
in case of decrepitude of the product
Stator core Check the stator core for damage external impact Exchanging the stator Exchanging the stator
Processed goods (coated Films) Check whether or not being punctured of crank shaft and being damaged in case of the crank shaft material failure replacing spindle Exchanging the gear&spindle
in case of the heat treatment failure replacing coated Films
Check the damage of the exterior part in case of the gear disassembly and assembly exchanging coated Films
shape transforming
Housing, Gear cover, Cylinder case, crank, handle Check whether or not the coated Films, emitted goods are damaged, shape transforming external impact exchanging housing
shape transforming cylinder, crank
gear case
exchanging handle
Beat guide, anvil, gear, connecting rod, piston Check whether or not the damage and abrasion of the chisel part of processed goods and damaged in case of overload operation exceed the rated using time modifying and replacing second gear
decrepitude of the product exceed the term of guarantee Connecting rod
In case of material's heat treatment failure Beat guide
Bearing Check the bearing for wear and damage Decrepitude of the product due to exceeded term of guarantee Replacing the bearing Exchanging the bearing
Damage due to forcible injection bearing
The gears Check the gear or pinion chisel part for damage In case of overload due to operation exceeding the rated using time Replacing the gear or pinion Exchanging the pinion
Decrepitude due to exceeded term of guarantee Exchanging the gear, crank shaft
In case of material's heat treatment failure
Electronic parts Check the switch, carbon brush, and brush holder for damage Smooth operation impossible due to the input of switch part dust Cleaning and replacing Cleaning and exchanging
In case of excessive tightening of fixing bolt of brush holder part Replacing each part in case of damaged switch, carbon brush, brush holder Exchanging the gear, spindle
In case of use of goods other than the manufacturer's goods for the carbon brush Exchanging the switch
Drill chuck Check the drill chuck's operation and for damage Damage due to external impact Exchanging the drill chuck Exchanging the drill chuck
Drill chuck not working due to mixing in of foreign matter (rust occurrence)
Change lever Check the change lever's operation and for damage External impact Exchanging the change lever Exchanging the change lever
Plate damage and worn out
Presspum Check the tail cover for any crushed or damaged part In case of careless handling by the consumer Replacing each part in case of the tail cover being crushed or damaged tail cover Exchanging the switch
Using the tail cover equipment Replacing each part of damaged prespun
In case of decrepit tail cover
Projected goods Check the handle(A,B) for damage Consumer's careless handling Replacing the handle(A,B) Exchanging the switch, handle
Crack in molding
Noise Amateur Abnormal noise ("woong") caused by the amateur fan's noise Amateur fan is running idling Replacing the amateur Exchanging the A/R
Gear, second pinion Check gear and pinion chisel part for wear and damage In case of abnormal use during the term of guarantee (decrepitude) Replacing the gear Exchanging the pinion
In case of failure of the chisel part Modifying the injecting condition
In case of occurrence of abnormal noise resembling iron being sharpened In case of gear chisel part damage, and wear Exchanging the crank shaft
Check the gear injection condition Failure in gear injection
Gear, piston, connecting rod Check the processed good's chisel part for damage and wear In case of abnormal use during the term of guarantee (decrepitude) Exchanging Cylinder
In case of chisel failure of the chisel part Connecting rod
Check for the occurrence of abnormal noise In case of gear part damage& wear Second gear
Check the gear injection condition Failure in gear injection Connecting rod
Bearing In case of bearing wear and damage While using equipment Replacing the bearing Exchanging the bearing
Dust seal assembly omitted
Abrasion over time and damage due to exceeded endurance limit
Mouse in case of mouse damage In case of frequent use of idle blow Replacing the mouse Exchanging the mouse
Check the existing oil When out of oil Supplement oil
Others Insufficient amount of grease Insufficient injecting amount Supplement grease Injecting grease
Output(RPM) decline Amateur Check the load current Amateur flame occurred Replacing the stator Exchanging the amateur
Decrepitude due to exceeded endurance limit
Coil failure
Fusing failure
Stator Check the stator coil for burn out due to overload Overload heat splice(coil burn-out) Replacing the stator Exchanging the stator
Bearing Check whether rotation is not smooth due to wear and damage Entry of foreign matter Cleaning, replacing Cleaning, exchanging
Punctured during assembly Replacing the bearing Replacing the bearing
Grease quantity Check whether excessive grease has been injected Grease over-injection (no-load current build-up) Injecting a fixed amount of grease Injecting a fixed amount of grease
Housing, inner cover, gear cover, crank case Check the occurrence of blurring in case of abrasion due to overuse of bearing's injecting part Decrepitude due to exceeded endurance limit Replacing the processed good(Coated Films) Exchanging each part's defective processed good
Inappropriate bearing injection part's distance between shelves (no-load current build-up)
Overheating Amateur, Stator Check the amateur and the stator for interference Failure in fastening of stator fixing bolt Modifying and replacing Exchanging the amateur
In case of bearing abrasion and damage Exchanging the stator
Bearing Check the bearing for abrasion and damage Check for wear and damage due to exceeded endurance limit of the bearing part Exchanging the bearing Exchanging the bearing
Grease if an Check adequate amount of grease(75~85g) is maintained in case of insufficient amount of grease Supplement grease; 75~85g Injecting grease
Processed goods Check the processed goods bearing's duly reaching part for abrasion (gear cover, housing, cylinder case,crank case) In case of bearing injection part's abrasion due to exceeded endurance limit of each processed good Separate replacement in case of abrasion on each part Separate exchange in case of abrasion on each part
In case of damage of each processed good
Others Failure during assembly of various parts (EX: insufficient tightening) Assembling failure Modifying various parts Using observable related measuring instrument
Check the voltage(V) Check whether or not the voltage(V) is rated voltage
Running idle Amateur, Gear, crank shaft Check the running idle of the amateur chisel part, first gear, crank shaft Heat treatment and inappropriate size Modifying and exchanging Exchanging the amateur
Exceeding the product specifications Exchanging the crank case
Running idle due to omission of key
Final gear, second pinion Check the running idle of the final gear Size and processing failure Modifying and replacing Exchanging the cylinder case
Peter key omission or damage
Running idle due to omission of key Exchanging the second gear
Second gear Check the second gear U-nut for loosening Insufficient U-nut clamping force Clamp based upon U-nut clamping force Second gear reclamp
Beat guide Check the beat guide for wear and damage Material failure Exchanging Exchanging the beat guide
Abrasion due to exceeded endurance limit
Drill chuck Check whether the drill chuck is rotating smoothly(check the drill bit's biting condition) Drill chuck abrasion and damage Modifying and exchanging Exchanging the drill chuck
Chuck handle not tightened (came loose)
Driving shaft Check the running idle of the clutch, first gear Size and processing failure Exchanging Exchanging the driving shaft
Abrasion due to exceeded endurance limit
Spindle Check whether or not the spindle assembling part's retainer has come loose Retainer damage Modifying and exchanging Exchanging the spindle
Abrasion due to exceeded endurance limit
Check the drill bit assembling part for wear Check the spindle processing
Short circuit Amateur Check the commutator for damage Using the carbon brush fixture Cleaning and replacing the amateur Exchanging the amateur
Check the amateur part coil for puncture Amateur turning failure
Check the amateur commutator and coil for foreign matter (dust) Heat releasing caused by foreign matter injection
Stator Check the coil for puncture and the insulating paper for damage Coil and insulating paper burn-out caused by heat release due to mixing in of foreign matter Replacing the stator Exchanging the stator
Foreign matter(dust) Inadequate cleaning Cleaning and replacing
Carbon brush Entry of carbon brush powder into the amateur and stator Quality problem of the carbon brush Cleaning and replacing Exchanging the amateur
Inadequate cleaning
Brush holder Brush holder crack and damage In case excessive of fastening of fixing bolt Replacing the brush holder Exchanging the brush holder
In case of burn-out of brush holder part due to heat release
Code Check whether the code sheath is peeled off Consumer's carelessness Modifying, replacing the code Exchanging the code
Code failure
Assembling failure
Switch Check the switch lead wire for damage Check the switch for damage and deformation Modifying and replacing Exchanging the switch
Connection layout Check whether the lead wire is squashed when arranging it Assembling failure Modifying and exchanging Check with the naked eye whether the wire is squashed
Blow failure Mouse Check the mouse for damage Using the mouse fixture Modifying and exchanging Replacing the mouse
Check the mouse for crack Frequent use of idle blow during operation
Bit guide, anvil Check the bit guide, anvil for damage Processing and material failure Modifying and exchanging Exchanging the bit guide
Abrasion due to exceeded endurance limit
Spindle Check whether the retainer is omitted Processing failure Modifying and exchanging Exchanging the spindle
Deformation
Piston, connecting rod Check if the piston is able to go and return Processing failure Modifying and exchanging Exchanging the connecting rod
Piston assembly failure
Damage due to exceeded endurance limit
Piston Piston abrasion In case of decrepitude due to long time use Replacing the piston Exchanging the piston
Oil over-inflow Oil over-inflow in case of assembling failure and during repair Removing the oil
Entry of foreign matter(dust) External impact or quality problem
Strike Check the strike for damage Quality problem Exchanging Exchanging the connecting rod
Decrepitude due to exceeded endurance limit
Change the lever Check whether the change lever is operated Change lever damage due to external impact Exchanging the change lever Exchanging the change lever
Decrepitude due to exceeded endurance limit
Driving shaft Check the plate for wear and damage Decrepitude due to exceeded endurance limit Exchanging Exchanging the ratchet
Quality problem
Ratchet gear Check the ratchet and gear for abrasion Decrepitude due to exceeded endurance limit Replacing the plate Exchanging the gear/spindle
Quality problem Exchanging the change lever
Grease Check if the amount of grease is adequate Inadequate amount of grease Supplement grease Grease injection
Grease over-injection Supplement the fixed amount of grease
X-ring, O ring In case of X-ring, O ring wear X-ring, O ring wear due to long time use Replacing the X-ring, O ring Exchanging the X-ring, O ring
In case of X-ring, O ring damage Assembling failure
Failure during repairg
Others Part omission and wear inside of the cylinder Decrepitude due to exceeded endurance limit Exchanging worn out parts Exchanging and modifying related parts
In case of inserting two identical parts Assembling failure Modifying the assembly

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