4. Replacing Carbon Brush
To replace carbon brushes, refer to “Replacing Carbon Brush” of the
operation manual in the package of new carbon brush.
*Carbon Brush for GX35RM/GX35EM (Pack of 2) : Order No. E023-011S
Handpiece Stand
The service tool and the collet chuck can be mounted on the bottom of
the handpiece stand.(Fig. 21)
Cautions in connecting the handpiece and the motor
If the drive shaft of the motor does not engage the drive dog on
the handpiece,do not force them to turn. It would break the motor.
Turn the handpiece back a few threads, rotate the collet chuck or
the tool by hand to engage the drive shaft and the drive dog.
Screw them together firmly.
Tighten collet chuck securely. (See Handling Motor and Handpiece.)
Problem Cause Action Taken
No rotation when the chuck control lever
or the bur lock ring is locked.
Foreign objects inside the ball bearings, or bearings frozen. Ask for repair.
Overheating during rotation.
Foreign objects inside the ball bearings
could have worn ball bearings.
Ask for repair.
Ask for repair.
Vibration and/or noise during rotation.
Worn ball bearings caused by the foreign objects.
Bent tools. Replace tool.
Heavy tool run-out.
Debris inside the collet chuck or inside the spindle. Clean inside the collet chuck or the spindle.
Worn collet chuck.
Replace collet chuck.
Worn ball bearings. Ask for repair.
Tool walks out.
Loose collet chuck.
Power Cord is disconnected.
Blown fuse.
Faulty Power Switch.
Foot Control is loose or disconnected.
HAND/FOOT Selector Switch is set to HAND.
The chuck control lever or the bur lock ring is in open position.
Check if the tool can be rotated with fingers.
If you have another motor and motor cord, use them and
check the operation.
Motor rotates at high speed.
Motor does not rotate.
Set HAND/FOOT Selector Switch to HAND
and check the operation.
Stop operation for approximately 10 minutes in a cool place
and check the operation again.
Repeat starting and stop by Power Switch.
Repeat starting and stop by Power Switch.
Check if the tool can be rotated with fingers.
The max speed can be set with Speed Control Knob
in Foot Control operation mode.
Action TakenTrouble Probable Cause
Error code E0 shows.
Error code E1 shows.
Error code E7 shows.
LED Speed Display does not show.
Foot Control does not turn on motor.
Error code E2 shows.
Error code E3 shows.
Error code E6 shows.
Error code E8 shows.
Error code E9 shows.
The speed cannot be increased.
Speed Control Knob or PC Board might be faulty.
Ask for control unit repair.
Set Speed Control Knob to the max speed.
Insert Power Cord Securely.
Replace a fuse of same rating. If the cause of blown fuse
is unknown, ask for inspection.
Ask for repair.
Connect Foot Control cord securely.
Set to FOOT.
Lock the chuck control lever or the bur lock ring.
If any abnormalities are found during rotation, ask for motor
& handpiece repair.
If replaced motor operates normally, original motor and
motor cord are faulty. Ask for repair.
Ask for control unit repair.
Ask for control unit repair.
Speed Control Knob or PC Board might be faulty.
Ask for control unit repair.
There is no problem if it operates normally. Make sure that
it is not hot in the surroundings and storage location.
If the error code frequently shows, ask for control unit repair.
There is no problem if it operates normally. If the error code
still shows, ask for control unit repair.
If the error code still shows, ask for control unit repair.
If the tool does not rotate normally, ask for motor
and handpiece repair.
Fig.20
Fig.21
Troubleshooting
Check followings before requesting repair.
Optional Micromotor Handpieces series and spare parts
Handpiece Motor
Transmission Clutch
Specifications are subject to change without notice. 2014.10.20 005
M
E257-012
E257-013
Z246
GX35RM & SCD
For Ring Type Handpiece Standard Motor with Straight Motor Cord
GX35M & SCD
For Lever Type Handpiece Standard Motor with Straight Motor Cord
GX35EM & SCD
E-Type Motor with Straight Motor Cord
UHR-35
Ring Type Handpiece for GX35RM
VH
Lever Type Handpiece for GX35M
VH-E
E-Type Lever Type Handpiece for GX35EM
VR-E
E-Type Ring Type Handpiece for GX35EM
VC45
Angle Type Handpiece for GX35M
GX35SCD
Straight Motor Cord
GX35CCD
Coiled Motor Cord
Vmax Handpiece Cradle
Carbon BrushE023-011S
H156
H178
H068
H063
H214
E054
E053
E205
CHH2.35 φ2.35 chuck H203-180
Model / DescriptionCat.#Product
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