Dewalt DW511 Hammer Drill Gearcase Replacement

简介

This guide will show you how to replace the gearcase assembly on the Dewalt DW511 Hammer Drill. The gearcase is responsible for the translation of motion between the motor and the spinning bit, controlling the speed and torque of the motion. The gearcase is attached to the armature, so the entire assembly will need to be removed as one piece.

你所需要的

步骤 1 Back Cover

Dewalt DW511 Hammer Drill Gearcase Replacement, Back Cover: 步骤 1 中的图像 1，3

Dewalt DW511 Hammer Drill Gearcase Replacement, Back Cover: 步骤 1 中的图像 2，3

Dewalt DW511 Hammer Drill Gearcase Replacement, Back Cover: 步骤 1 中的图像 3，3

Remove three 19 mm T20 Torx screws from the back of the drill.

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步骤 2

Dewalt DW511 Hammer Drill Gearcase Replacement: 步骤 2 中的图像 3，3

Place an opening tool in the groove line of the handle and pop the back loose.
Grab the drill with two hands and pull the cover off.

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步骤 3 Power Cord

Dewalt DW511 Hammer Drill Gearcase Replacement, Power Cord: 步骤 3 中的图像 1，2

Dewalt DW511 Hammer Drill Gearcase Replacement, Power Cord: 步骤 3 中的图像 2，2

Firmly grab the body of the trigger.
Slowly pull the trigger until the entire body is out and only attached by wires.

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步骤 4

Dewalt DW511 Hammer Drill Gearcase Replacement: 步骤 4 中的图像 3，3

在这个步骤中使用的工具：

Tweezers

$4.99

购买

With sharp point tweezers, push the little metal flap up in the hole holding the wire.
Clamp the wire with blunt tweezers, and slowly pull the wire out.

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步骤 5

Dewalt DW511 Hammer Drill Gearcase Replacement: 步骤 5 中的图像 3，3

With a pair of blunt nose tweezers, grab the white wire.
Carefully wiggle the wire loose.
Pull the wire slowly until it comes out.

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步骤 6

With both wires free, the power cord is free from the trigger body.

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步骤 7 Brushes

Dewalt DW511 Hammer Drill Gearcase Replacement, Brushes: 步骤 7 中的图像 1，3

Dewalt DW511 Hammer Drill Gearcase Replacement, Brushes: 步骤 7 中的图像 2，3

Dewalt DW511 Hammer Drill Gearcase Replacement, Brushes: 步骤 7 中的图像 3，3

Use an opening tool to lift up the spring holding down the brush.
Remove the brush from its holding.

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步骤 8

在这个步骤中使用的工具：

Tweezers

$4.99

购买

With a pair of blunt nose tweezers, grab the red wire.
Carefully wiggle the wire loose.
Pull the wire slowly until it comes out.

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步骤 9 Lever Assembly

Dewalt DW511 Hammer Drill Gearcase Replacement, Lever Assembly: 步骤 9 中的图像 1，3

Dewalt DW511 Hammer Drill Gearcase Replacement, Lever Assembly: 步骤 9 中的图像 2，3

Dewalt DW511 Hammer Drill Gearcase Replacement, Lever Assembly: 步骤 9 中的图像 3，3

Remove two 45 mm T20 Torx screws.
Remove one 30 mm T20 Torx screw.

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步骤 10

Pull off the top case and set it aside.

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步骤 11

Dewalt DW511 Hammer Drill Gearcase Replacement: 步骤 11 中的图像 3，3

Grab the gear case cover and gently pull it out just enough to where it exposes the lever assembly.
It is important that the brushes are removed before you do this step or you may damage your brushes.
The lever assembly can now be lifted out.

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步骤 12

With the old lever assembly removed you can now replace it with a new one.

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步骤 13 Gearcase

Dewalt DW511 Hammer Drill Gearcase Replacement, Gearcase: 步骤 13 中的图像 1，3

Dewalt DW511 Hammer Drill Gearcase Replacement, Gearcase: 步骤 13 中的图像 2，3

Dewalt DW511 Hammer Drill Gearcase Replacement, Gearcase: 步骤 13 中的图像 3，3

Hold the hammer drill tool firmly by the handle.
Gently separate the gear case unit from the hammer drill body.

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步骤 14

Dewalt DW511 Hammer Drill Gearcase Replacement: 步骤 14 中的图像 3，3

The metallic alloy gear case is attached to the armature and removes as a unit. Separation of the gear case from the armature requires specialized hand tools.
The third photo shows a gear behind the chuck that interlocks to the gear case.
The plastic housing is prone to damage if excessive force is applied during the removal of the gear.