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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 the brush holder is duly reached assembling failure exchanging exchanging brush holder
brush holder damage
Processed goods Check the processed goods bearing's duly reaching part condition and the processed goods bearing's duly reaching part abrasion condition (gear cover, housing, cylinder case, crank case) in case of bearing injection part's abrasion according to using exceeding endurance limit of each processed good separately replacing in case of each part's abrasion occurred separately replacing in case of each part's abrasion occurred
bearing injection part's distance between shelves size failure
Vibration Amateur Check bending and being stabbed of the A/R shaft fan damage and being stabbed of shaft occurred in time of repairing replacing amateur exchanging amateur
Check whether or not the amateur fan is damaged change the shape (environment)
Check the unbalance shaft fan injection part knurling abration
Bearing Check whether or not the bearing worn out and damaged in case of bearing worn out according to decrepitude replacing bearing exchanging bearing
in case of bearing damaged
Processed goods Check the abrasion condition of processed goods bearing's duly reaching part (gear cover, cylinder case, crank case, housing) in case of each part's processed goods decrepit separately replacing in case of each part's abrasion occurred separately replacing in case of each part's abrasion occurred
bearing injection part's size of distance between shelves failure
Piston, Driving Shaft Check the driving Shaft is duly reached to the piston Piston processing failure exchanging exchanging piston
bending occurred by external impact
assembling failure
spindle Check the spindle size Processing failure exchanging spindle exchanging
Drill bit duly reaching part's abrasion
Piston, connecting rod Check whether the piston and the connecting rod operated well piston processing failure exchanging exchanging piston
bending occurred by external impact
assembling failure
Drill chuck Check drill chuck damage and balance being damaged by external impact exchanging drill chuck exchanging drill chuck
decrepit according to using exceeding endurance limit
Flame Failure Flame caused by Carbon brush Carbon brush's quivering an external diameter of commutator being scratched phenomenon and transforming replacing amateur exchanging amateur
Severe carbon brush damage and abrasion Using exceeding the abrasion limiting line replacing amateur/ carbon brush
Carbon brush spring elasticity lose flame occurred caused by using the fixture
Flame caused by Overheating Check the amateur and the stator are contacted burn-out occurred by overload using exchanging amateur and stator exchanging amateur and stator
case concentricity failure replacing case exchanging case
Flame caused by vibration Check whether the bearing is damaged bearing damaged by foreign body inserting replacing bearing exchanging 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 gear
Amateur flame Check the rough degree of the commutator surface an external diameter of commutator being scratched phenomenon and transforming replacing amateur exchanging 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 body(dust)
Flame caused by Stator Check whether or not the stator coil worn out burn-out occurred by overload using replacing stator exchanging stator
Check the stator coil insulating paper damage
Damage (be broken) Amateur fan Check whether or not the amateur fan is damaged(shaking measuring) foreign body inserting in using replacing amateur (check with naked eye) exchanging amateur
Check with naked eye of whether or not being damaged shape transforming(environment) in releasing
amateur commutator Check whether or not the amateur commutator part is damaged In using privately made goods Replacing amateur(check with naked eye) Exchanging amateur
in case of exceeding the term of guarantee
in case of decrepitude of the product
Stator core Check whether or not the stator core is damaged external impact exchanging stator exchanging stator
Processed goods (coated Films) Check whether or not being stabbed of crank shaft and being damaged in case of the crank shaft material failure replacing spindle exchanging gear&spindle
in case of the heat treatment failure replacing coated Films
Check the damage of the exterior part in case of the gear disassemblying and assemblying 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 overloading 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 whether or not the bearing is worn out and damaged decrepitude of the product exceed the term of guarantee replacing bearing exchanging bearing
damage when forcibly injecting bearing
The gears Check whether or not the gear or the pinion chisel part is damaged in case of overloading operation exceed the rated using time replacing gear or pinion exchanging pinion
decrepitude exceed the term of guarantee exchanging gear, crank shaft
in case of material's heat treatment failure
Electronic materials Check whether or not the switch, carbon brush, brush holder are damaged smooth operating impossible according to the input of a switch part dust cleaning and replacing cleaning and exchanging
in case of tightening fixing bolt of brush holder part too much replacing at each part in case of the switch, carbon brush, brush holder damaged exchanging gear, spindle
in case of using privately made goods of carbon brush exchanging switch
Drill chuck Check the drill chuck's damage and operation being damaged by external impact exchanging drill chuck exchanging drill chuck
drill chuck not working by foreign body mixing (rust occurrence)
Change lever Check the change lever's damage and operation external impact exchanging change lever exchanging change lever
plate damage and worn out
Presspum Check the tail cover being crushed and damage part in case of consumer careless handling replacing at each part in case of the tail cover being crushed and damaged exchanging switch
using the tail cover equipment replacing at each part of presspum damaged
in case of the tail cover decrepit
Projected goods Check the handle(A,B) damage consumer careless handling replacing the handle(A,B) exchanging switch, handle
crack in molding
Noise Amateur Abnormal noise occurred as if 'woong' caused by the amateur fan noise amateur fan is running idling replacing amateur exchanging A/R
Gear, second pinion Check the worn out and damage of the gear and pinion chisel part in case of abnormal using of the term of guarantee (decrepitude) replacing gear exchanging pinion
in case of chisel failure of the chisel part Modifying injecting condition
in case of occurrence of abnormal noise as if the iron is sharpened in case of gear chisel part damage, worn out exchanging crank shaft
Check the gear injecting condition Failure in gear injecting
Gear, piston, connecting rod Check the damage and worn out of the processed good's chisel part in case of abnormal using of the term of guarantee (decrepitude) exchanging cylinder
in case of chisel failure of the chisel part connecting rod
Check the occurrence of abnormal noise in case of gear chisel part damage&worn out second gear
Check the gear injecting condition Failure in gear injecting connecting rod
Bearing In case of the bearing's worn out and damage in using equipment replacing bearing exchanging bearing
dust seal assembling omitted
in time of abrasion and damaging exceeding endurance limit
Mouse in case of mouse damaged in case of frequent using of the idle blow replacing mouse exchanging mouse
check the oil existing when out of oil oil supplement
And so forth lack of grease amount lack of injecting amount supplement adequate amount of grease injecting grease
Output(RPM) decline Amateur Check load current amateur flame occurred replacing stator exchanging amateur
decrepit according to using exceeding endurance limit
coil failure
fusing failure
Stator Check whether or not the stator coil burn out according to overload Overload heat splice(coil burn-out) replacing stator exchanging stator
Bearing Check whether or not smoothly rotating with being worn out and damaged insert foreign body cleaning, replacing cleaning, exchanging
being stabbed when assembling replacing bearing replacing bearing
Grease quantity Check whether or not the grease quantity over-injected grease over-injection (no-load current build-up) injecting fixed amount of grease injecting fixed amount of grease
Housing, inner cover, gear cover, crank case Check the occurrence of blurring in case of abrasion caused by over use of bearing injecting part decrepit according to exceeding endurance limit replacing processed good(coated Films) exchanging each part's of processed good's defect
bearing injection part distance between shelves size failure (no-load current build-up)
Overheating Amateur, Stator Check the interference of the amateur and the stator failure in case of fastening stator fixing bolt modifying and replacing exchanging amateur
in case of the bearing abrasion and damage exchanging stator
Bearing Check the bearing abrasion and damage Check whether or not be worn out and damaged according to using exceeding endurance limit of the bearing part exchanging bearing exchanging bearing
Grease Check adequate amount of grease(75~85g) is kept in case of lack of adequate amount of grease supplement the amount of grease; 75~85g injecting grease
Processed goods Check the processed goods bearing's duly reaching part abrasion condition (gear cover, housing, cylinder case,crank case) in case of bearing injection part's abrasion according to using exceeding endurance limit of each processed good separately replacing in case of each part's abrasion occurred separately exchanging in case of each part's abrasion occurred
in case of damage of each processed good
And so forth Various parts assembling failure (EX: less tighten) Assembling failure modifying various part Using observable related measuring instrument
Check the voltage(V) Check whether or not the voltage(V) is rated voltage
Running idle mateur, Gear, crank shaft Check the running idle of the amateur chisel part, first gear, crank shaft heat treatment and size failure modifying and exchanging exchanging amateur
Excessively using more than product specifications exchanging crank case
running idle caused by the key omitted
inal gear, second pinion Check the running idle of the final gear size and processing failure modifying and replacing exchanging cylinder case
peter key omission or damage
running idle caused by the key omitted exchanging second gear
Second gear Check the second gear U-nut loose U-nut clamping force shortage clamp based upon U-nut clamping force second gear reclamp
Beat guide Check whether the beat guide is worn out and damaged material failure exchanging exchanging beat guide
abrasion according to using exceeding endurance limit
Drill chuck Check whether or not the drill chuck smoothly rotate(check the drill bit biting condition) Drill chuck abrasion and damage modifying and exchanging exchanging drill chuck
Not tighten by chuck handle (come loose)
Driving shaft Check the running idle of the clurch, first gear Size and processing failure exchanging exchanging driving shaft
abrasion according to using exceeding endurance limit
Spindle Check whether or not the spindle assembling part's retainering loose retainering damage modifying and exchanging exchanging spindle
abrasion according to using exceeding endurance limit
Check the drill bit assembling part worn out Check the spindle processing
Short circuit Amateur Check the commutator damage Using carbon brush fixture cleaning and replacing amateur exchanging amateur
Check the amateur part coil's stabbed amateur turning failure
Check the foreign body(dust) of amateur commutator and coil heat releasing caused by foreign body injection
Stator Check whether or not the coil is stabbed and the insulating paper is damaged Coil and insulating paper burn-out by heat release caused by foreign body mixing replacing stator exchanging stator
Foreign body(dust) leaning inadequate cleaning and replacing
Carbon brush Mixing the carbon brush powder to amateur and stator Quality of the carbon brush failure cleaning and replacing exchanging amateur
cleaning inadequate
Brush holder Brush holder crack and damage in case of fastening fixing bolt too much replacing brush holder exchanging brush holder
in case of burn-out of brush holder part by heat release
Code Check the code sheath is peeled off Consumer carelessness modifying, replacing code exchanging code
Code itself failure
Assembling failure when assembling
Switch Check whether the switch lead wire is damaged Check the switch damaging and transforming condition modifying and replacing exchanging switch
Connection arrangement Check whether the lead wire is squashed when arranging it Assembling failure modifying and exchanging check the wire squashed by naked eye
Blow failure Mouse Check whether the mouse is damaged Using the mouse fixture modifying and exchanging replacing mouse
Check the mouse crack frequent using of the idle blow during operation
Bit guide, anvil Check whether or not the bit guide, anvil is damaged processing and material failure modifying and exchanging exchanging bit guide
abrasion according to exceeding endurance limit
Spindle Check whether the retainering is omitted processing failure modifying and exchanging exchanging spindle
shape transforming
Piston, connecting rod Check if piston is able to go and return processing failure modifying and exchanging exchanging connecting rod
piston assembling failure
damage according to exceeding endurance limit
Piston Piston abrasion in case of decrepit for using long time replacing piston exchanging piston
Oil over-inflow Oil over-inflow in case of assembling failure and repairing removing oil
Inserting foreign body(dust) external impact or the quality failure
Strike Check whether the strike is damaged the quality failure exchanging exchanging connecting rod
decrepit according to exceeding endurance limit
Change lever Check whether the change lever is operated change lever damage caused by external impact exchanging change lever exchanging change lever
decrepit according to exceeding endurance limit
Driving shaft Check whether the plate worn out and damage decrepit according to exceeding endurance limit exchanging exchanging ratchet
the quality failure
Ratchet gear Check abrasion condition of ratchet and gear decrepit according to exceeding endurance limit replacing plate exchanging gear/spindle
the quality failure exchanging change lever
Grease Check adequate amount of grease containing Short amount of grease grease supplement grease injection
grease over-injection grease fixed amount supplement
X-ring, O ring in case of X-ring, O ring worn out X-ring, O ring worn out for using long time replacing X-ring, O ring exchanging X-ring, O ring
in case of X-ring, O ring damage assembling failure when assembling
repairing failure when repairing
And so forth part omission and worn out inside of cylinder decrepit according to exceeding endurance limit exchanging worn out parts exchanging and modifying the related parts
in case of inserting two identical parts Assembling failure modifying the assembling

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