Ryobi D551H manual Turning the Hammer Drill ON/OFF, Changing the Rotation, Locking on

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OPERATION

TURNING THE HAMMER DRILL ON/OFF

See Figure 8.

To turn the hammer drill on and off.

nTo turn the drill on: depress the switch trigger.

nTo turn the drill off: release the switch trigger.

CHANGING THE ROTATION

See Figure 9.

The direction of the chuck is controlled by the lever located above the switch trigger.

NOTE: The design of the switch will not permit changing the direction of rotation while the drill is running. Release the switch trigger and allow the drill to stop before chang-

DEPRESS SWITCH TRIGGER TO

ing its direction.

nFor forward rotation: Move the lever to the left.

nFor reverse rotation: Move the lever to the right.

NOTE: The hammer drill will not run unless the lever is pushed fully to the left or right.

CAUTION:

The hammer drill is not designed for reverse hammer- ing. Failure to heed this caution may result in damage to the drill.

TURN HAMMER DRILL ON

FORWARD

ROTATION

Fig. 8

LOCKING ON

See Figure 10.

The lock-on feature allows you to lock the drill on when you operate it continuously for extended periods of time. If you have the “lock-on” feature engaged during use and the drill is disconnected from the power supply, disengage the “lock-on” feature immediately. Also, do not lock the trigger switch if you might need to suddenly stop the drill.

WARNING:

Before connecting the hammer drill to a power supply, make sure it is not in the “locked-on” position. Failure to do so could result in accidental starting of the drill result- ing in possible serious injury.

To lock on:

nDepress the switch trigger.

nPush in the lock-on button.

nRelease the switch trigger.

nRelease the lock-on button.

NOTE: To release the lock, depress the switch trigger.

REVERSE

 

ROTATION

Fig. 9

 

LOCK-ON

 

BUTTON

SWITCH

TRIGGER

Fig. 10

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Contents Save this Manual for Future Reference OPERATOR’S ManualIntroduction Table of ContentsElectrical Safety General Safety RulesPersonal Safety Work AreaService Specific Safety RulesSymbol Name DESIGNATION/EXPLANATION SymbolsSymbol Signal Meaning Double Insulation ElectricalElectrical Connection Extension CordsProduct Specifications FeaturesFeatures Operation Assembly Unpacking Packing ListInserting Bits Adjusting the Auxiliary Handle AssemblyRemoving Bits Adjusting the Drill Mode Adjusting the Depth Gauge RODAdjusting the Speed Changing the Rotation Turning the Hammer Drill ON/OFFLocking on General Maintenance MaintenanceDrilling Helpful TipsRemoving the Chuck LubricationTightening a Loose Chuck Service Model NO. and Serial no