Hitachi H90SB manual Service and Repairs, Double Insulation System Enhances Safe Operation

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DOUBLE INSULATION

15.AVOID UNINTENTIONAL STARTING. Don’t carry a plugged-in the power tool with finger on switch. Be sure switch is off when plugging in.

16.OUTDOOR USE EXTENSION CORDS. When the power tool is used outdoors, use only extension cords intended for use outdoors and so marked.

17.STAY ALERT. Watch what you are doing. Use common sense. Do not operate the power tool when you are tired.

18.CHECK DAMAGED PARTS. Before use of the power tool, a guard or other part should be carefully checked to determine that it will operate properly and perform its intended function. Check the alignment of moving parts, binding of moving parts, breakage of parts, mounting, and any other conditions that may affect its operation. A guard or other part that is damaged should be properly repaired or replaced by an authorized service center unless otherwise indicated elsewhere in this instruction manual.

Have defective switches replaced by an authorized service center. Do not use the power tool if switch does not turn it on and off.

19.Do not use the power tool for applications other than those specified in the Handling Instructions.

20.To ensure the designed operational integrity of the power tool, do not remove installed covers or screws.

21.Do not touch movable parts or accessories unless the power source has been disconnected.

22.Use your power tool at lower input than specified on the nameplate; otherwise, the finish may be spoiled and working efficiency reduced due to motor overload.

23.DO NOT WIPE PLASTIC PARTS WITH SOLVENT. Solvent such as gasolin, thinner, benzine, carbon tetrachloride, alcohol, ammonia and oil containing chloric annex damage and crack plastic parts. Do not wipe them with such solvents. Wipe plastic parts with a soft cloth lightly dampened with soapy water.

24.Consult an authorized service center in the event of the power tool failure.

25.Use only original HITACHI replacement parts.

26.This power tool should only be disassembled for replacement of carbon brushes.

SERVICE AND REPAIRS

All quality tools will eventually require servicing or replacement of parts due to wear from normal use. These operations should ONLY be performed by an authorized service center.

DOUBLE INSULATION SYSTEM ENHANCES SAFE OPERATION

To enhance safe operation of this electric power tool, HITACHI has adopted a double insulation system. The term “double insulation” used here denotes an insulation system with two insulations physically separated and arranged between the electrically conductive material connected to the power supply and the outer frame subject to contact by the operator.

Thus, the power tool is termed double insulated and both the “” mark and “Double insulation”, or either one is indicated on the name plate.

While no external grounding is required with this system, normal safety precautions as outlined in this manual must still be followed.

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Contents Demolition Hammer Model H 90SB General Operatonal Precautions Double Insulation System Enhances Safe Operation Service and RepairsReplacement Parts Particular Precautions on Using Demolition HammerName of Parts Prior to Operation SpecificationsStandard Accessories ApplicationOperation HOW to Replace GreasePower switch Mounting an accessory, such as a bull point, a cutter, etcMaintenance and Inspection Page Part Name Roll Pin D6 ⋅ Lever Pin Bolt ⋅ 4 ⋅ Page 209