Dremel Multipro 395 On Off Switch Replacement Repair Guide

Difficulty

Moderate

Steps

Time Required

                          15 - 40 minutes

Sections

On/Off Switch
12 steps

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Introduction

What you need

Step 1

              On/Off Switch

Remove the blue caps located on either side of the MultiPro, using a 3 mm flathead screwdriver.

Remove the blue caps located on either side of the MultiPro, using a 3 mm flathead screwdriver.

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Step 2

Carefully remove the carbon brushes attached at the end of the springs by gently pulling on the springs using your hands.
Inspect brushes at this time. If they are approching 1/8" in length, they will need replacement soon.

Carefully remove the carbon brushes attached at the end of the springs by gently pulling on the springs using your hands.

Inspect brushes at this time. If they are approching 1/8" in length, they will need replacement soon.

Step 3

Pull one side of the hanger up and then pull away from the Multipro until the other side can be pulled out.

Pull one side of the hanger up and then pull away from the Multipro until the other side can be pulled out.

Step 4

Remove the 4 15mm screws located on the bottom of the Multipro with a T-15 screwdriver.

Remove the 4 15mm screws located on the bottom of the Multipro with a T-15 screwdriver.

Step 5

Hold down the collet lock, remove the chuck cap from the top of the Multipro by screwing counterclockwise.

Hold down the collet lock, remove the chuck cap from the top of the Multipro by screwing counterclockwise.

Step 6

Remove the black housing cap from the Multipro located directly below the chuck cap.

Remove the black housing cap from the Multipro located directly below the chuck cap.

Step 7

Pull the bottom side of the casing up to remove it.

Pull the bottom side of the casing up to remove it.

Step 8

Gently lift the motor shaft out of the Multipro.

Gently lift the motor shaft out of the Multipro.

Step 9

Remove the rubber ring from the bottom of the armature.

Remove the rubber ring from the bottom of the armature.

Step 10

Pull the on/off switch off of the 120V field, paying careful attention to the prongs on the on/off switch.
For reassembly, make sure the prongs are touching the metal connecters on the bottom of the 120V field.

Pull the on/off switch off of the 120V field, paying careful attention to the prongs on the on/off switch.

For reassembly, make sure the prongs are touching the metal connecters on the bottom of the 120V field.

Step 11

Remove the 2 wires on the back of the switch, connecting the cord to the switch, by inserting a small metal pick into the hole next to the wires and pulling the pick and the wire out together.

Remove the 2 wires on the back of the switch, connecting the cord to the switch, by inserting a small metal pick into the hole next to the wires and pulling the pick and the wire out together.

Step 12

Carefully insert the wires into the new switch making sure the white wire is attached to left hand side and the black wire is attached to the right hand side when the switch is facing up. By pushing the wires in with your hand.

Carefully insert the wires into the new switch making sure the white wire is attached to left hand side and the black wire is attached to the right hand side when the switch is facing up. By pushing the wires in with your hand.

To reassemble your device, follow these instructions in reverse order.

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                    jeeyunsun

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                       University of Kentucky Louisville, Team 1-5, Mathis Fall 2014                        

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                                            4 Guides authored

Juan Concha - Jan 31, 2016

Useful.

You do not have to always replace the switch.

You may instead clean it. Just did that.

Alas I didn’ t take any picture, (I’m not accustomed to tablets and thought would take too much time).

Switch’s surface that faces mains cable is a lid held by four built-in pins that go in its corners; they end in hooks that latch in the body of switch. When you take out the lid you have ample access to the switch itself. It is actually a potentiometer. Mine was covered by dust and grease, after cleaning with Xerox film remover it functioned again, (if I had had it, I would have just used alcohol)

To remove lid I just used a small not too sharp knife to pry between the lid and the body of switch, going slowly and lifting each corner just a little rrpeating that in order severa times.

Dan Kunz - Nov 23, 2016

I too discovered that I could clean the potentiometer switch, and was then able to get it to function normally. Alas, I had already purchased the replacement switch, along with a spare set of brushes. I was quite surprised, by the amount of carbon remaining on the original brushes, especially considering the amount of use this particular Dremel MultiPro, Model #395 has logged! I found that simply by disassembling my unit, and blowing our the accumulated dust and gunk, yes that’s a word in this man’s vocabulary, it was ready to be reassembled, and has been working smoothly ever since! The fix-it directions provided here, were both simple and easy to follow, in addition to being filled with pictures. I am one of those who is very much, a visual learner. Kudos to the individual who produced this fix-it segment! A. Daniel Kunz - Nov. 23 2016

Jeffo Moreira - Dec 28, 2017

Weird. I replaced with a new switch and the “no inbetween speeds” sympton still remains. Measured the voltage in my shop and it is 125-127V so I should be fine. Dunno what else to do.

Barry Brewer - Jan 14, 2018

Nice write-up! Thank you… I have a Model 395, Type 4, and pretty sure I have a switch problem… Took the unit apart and cleaned with alcohol, but no change… The tool ramps up to speed (seemingly correctly) until I reach about 3-to-3-1/2 on the switch. It then levels-off at that same speed through the “4” setting, and then completely quits at 4-1/2-to-5 setting on the switch… It does that every time.. So the 3-1/2 speed setting is about as fast as it goes…

This familiar to anyone else? Again, pretty well convinced it’s a switch issue, but just thought I’d post to see if anyone else has experienced this, and the solution… Thanks!

T S - Jun 28, 2018

Dremel MultiPro Model 395 Type5

Motor fails to run by itself. If I place the speed switch at setting 5 and then turn the chuck counter clockwise by hand, the motor runs at high speed. When I Iower the speed control to 4.3,2,1, the motor stops running. I thought it might be the brushes so I installed a new set of brushes. Dremel part # 90930-05. This has not solved the problem. The switch moves from 1 to 5 very smoothly without stopping at any settings between 1 and 5.

I normally use the Dremel on high speed. Any way to jump the switch so it only runs on high speed?

Introduction#

What you need#

Team#

Introduction

What you need

Team