Hitachi D 13VB3 MAINTENANCE AND INSPECTION, Fig, NOTE, CAUTION, CAUTION, 2. Drilling, MODIFICATION, 6.Service parts list, Slip clutch mechanism, 5.Replacing supply cord

Stopper

Speed control dial

Low speed	High
	speed

Switch trigger

Fig. 8

2. Drilling

￿When drilling, start the drill slowly, and gradually increasing speed as you drill.

￿Always apply pressure in a straight line with the bit. Use enough pressure to keep drilling, but do not push hard enough to stall the motor or deflect the bit.

￿To minimize stalling or breaking through the material, reduce pressure on drill and ease the bit through the last part of the hole.

￿If the drill stalls, release the trigger immediately, remove the bit from the work and start again. Do not click the trigger on and off in an attempt to start a stalled drill. This can damage the drill.

￿The larger the drill bit diameter, the larger the reactive force on your arm.

Be careful not to lose control of the drill because of this reactive force.

To maintain firm control, establish a good foothold, use side handle, hold the drill tightly with both hands, and ensure that the drill is vertical to the material being drilled.

Slip clutch mechanism

This unit contains a slip clutch that causes the gears between the motor and drill bit to slip when an excessive load is suddenly applied. The slip clutch protects the unit from a large violent reaction the load might cause.

CAUTION

￿If the slip clutch triggers and stops the drill bit rotation, quickly turn off the power switch.

￿Do not operate the unit in a way that frequently triggers the slip clutch.

MAINTENANCE AND INSPECTION

1.Inspecting the drill bits

Since use of an abraded drill bits will cause motor malfunctioning and degraded efficiency, replace the drill bits with a new one or resharpening without delay when abrasion is noted.

2.Inspecting the mounting screws

Regularly inspect all mounting screws and ensure that they are properly tightened. Should any of the screws be loose, retighten them immediately. Failure to do so could result in serious hazard.

3.Maintenance of the motor

The motor unit winding is the very “heart” of the power tool. Exercise due care to ensure the winding does not become damaged and/or wet with oil or water.

4.Inspecting the carbon brushes

For your continued safety and electrical shock protection, carbon brush inspection and replacement on this tool should ONLY be performed by a Hitachi Authorized Service Center.

5.Replacing supply cord

If the supply cord of Tool is damaged, the Tool must be returned to Hitachi Authorized Service Center for the cord to be replaced.

6.Service parts list

CAUTION

Repair, modification and inspection of Hitachi Power Tools must be carried out by a Hitachi Authorized Service Center.

This Parts List will be helpful if presented with the tool to the Hitachi Authorized Service Center when requesting repair or other maintenance.

In the operation and maintenance of power tools, the safety regulations and standards prescribed in each country must be observed.

MODIFICATION

Hitachi Power Tools are constantly being improved and modified to incorporate the latest technological advancements.

Accordingly, some parts may be changed without prior notice.

NOTE

Due to HITACHI’s continuing program of research and development, the specifications herein are subject to change without prior notice.

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