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What is wrong with my Makita bhp451 drill. it is locked up and motor can't turn drill

Posted by ron woycehoski on


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SOURCE: Makita BHP451 Question

go with the hitachi, i've had 4 makita drills all with gearbox slipping. expensive to fix.

Posted on Feb 16, 2009



  • 2 Answers

SOURCE: 18v makita bhp451 cordless hammer drill.clutch

its prob stuck between gears one and two try a little wd40 on the gear selector switch

Posted on Jul 31, 2009


Keith Onions

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SOURCE: ive stripped down my makita 18v bhp451 combi drill and dont know where the 2 steel cylinders go from the gearbox end of the drill (i belive)

I answered this on a different post, Have taken apart the makita bhp 451 hammer drillHope this helps.

Posted on Feb 02, 2013

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The battery is fine and the guide light comes on fine, but mt Makita BHP451 has no power to the motor. What's the problem?

switch it between forward and reverse a few times without pulling the trigger. then try again.

Nov 06, 2013 | Makita Drills

1 Answer

My Makita BHP451 Li ion battery drill periodically the varible speed does not work, ie. the button works as a on/off switch - any idea what's wrong. Thanks Bjarne

Bjarne, odds are the variable speed function of the trigger is failing. There are Makita repair centers that perform repair, and sell parts if you want to take it on as a DIY project. Before proceeding, I would make sure the warranty has expired. If it is still in warranty a Makita repair center should repair it for no charge.

Dec 19, 2010 | Makita LXT202 BHP451 18 Volt Hammer Drill...

2 Answers

Burnt Out Drill?

hi , the bad news is you have almost certainley damged the motor and may have damaged the switch ( it is also the speed controller ) , the good news is because its a Makita then you will have little trouble in getting spares for it , if you repost the actual model and what country your in and ask for a spares diagram/parts list i will help further

Jan 10, 2010 | Makita Tools 18V 1/2" Lxt Lithium - Ion...

1 Answer

How to fix or replace a electric brake problem on a makita bhp451

you would need to replace the switch, but before doing that check the brush length for excessive wear. you can go to for a breakdown for this model.

Nov 29, 2009 | Makita LXT202 BHP451 18 Volt Hammer Drill...

3 Answers

How do i re-assemble a makita 18v cordless drill

check out and type in your model eg bhp451 they should have an exploded diagram.

Dec 21, 2008 | Makita 12 Volt Cordless Drill/Driver Kit

2 Answers

Makita BHP451 Question

Buy a hitachi li-ion 18 volt ds18dl.
All parts are repairable & replacebable should they breakdown. Ie gearbox.
Gearbox parts are not available on makita , only whole gearboix which can be expensive.

Aug 27, 2008 | Makita Tools 18V 1/2" Lxt Lithium - Ion...

1 Answer

Grinding noise

possible burnt out in the brush holder assy,checked the motor

Apr 10, 2008 | Makita Tools 18V 1/2" Lxt Lithium - Ion...

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