Hammer Drill Repair Questions, Solutions and Tips - Vr2020

Hammer Drills - Recent Questions, Troubleshooting & Support


It is very likely the carbon brushes that contact the motor to transfer electricity to the windings. those tend to crack and get stuck or wear out. They need to be moving in and out freely and have spring pressure pushing them in towards the motor. you can get new ones cheap at ereplacementparts.com if they sell them.

Hammer Drills | Answered on Oct 12, 2018


Use the hammer drill setting. you MUST use a carbide bit.

Hammer Drills | Answered on Sep 26, 2018


no fuse in the unit
check for broken wires in the plug or lead or faulty nswitch

Hammer Drills | Answered on Aug 26, 2018


check and test selector switch or hammering unit has failed or seized

Hammer Drills | Answered on Aug 14, 2018


If they are replaceable, you will be opening up the drill by removing the screws holding it together, and then you might see the brushes that need replacement.
Know that although you can open most hammer drills, and you can replace the brushes in some, some you cannot reassemble, but you can surely try.
I fix these myself, and my success rate is about 50 %.
God bless your efforts.

Hammer Drills | Answered on Jul 05, 2018


why not read the instructions that came with. there are many types of chucks and bits

Hammer Drills | Answered on Apr 15, 2018


Order from the manufacturer/distributor.

Hammer Drills | Answered on Mar 25, 2018


Go to mfg web site for parts.

Hammer Drills | Answered on Jan 02, 2018


Put the clockwise - anticlockwise button to the middle 'lock' position. That is the button above the trigger that is orange. Then viewing the drill from the drill bit, turn the chuck anticlockwise.

Hammer Drills | Answered on Dec 13, 2017


turn the lever from drill to hammer
there will be 2 levers so follow the icons near the lever

Hammer Drills | Answered on Dec 05, 2017


Buy Hitachi DH40MR 1 9 16 SDS MAX Electric Rotary Hammer Parts

Re4move the retaining screw #90 and remove and replace brushes

Hammer Drills | Answered on Nov 27, 2017

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