Makita GA4030K Grease Replacement

Written By: Laura Ann Jagels
  • Comments: 9
Makita GA4030K Grease Replacement

Difficulty

Moderate

Steps

8

Time Required

30 - 40 minutes

Introduction

This guide will show you how to replace the grease in your angle grinder should it become dirty and fail to lubricate the gears.

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    • Check for the provided lock nut wrench. This is used for loosening the piece that keeps the disk and cover attached.

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    • Unscrew the handle unit until it is removed completely.

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    • Hold the black switch located on the front casing.

    • Still holding the switch, use the lock nut wrench to loosen the silver disk holding everything in place.

    • Once loose, remove the silver disk and/or your grinding disk.

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    • Use a Phillips #02 screwdriver to remove the 15 mm pan head screw that holds the cover in place.

    • Remove the cover by lining up the knob on the cover with the notch in face plate.

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    • Unscrew the four 15 mm pan head screws using a Phillips #02 screwdriver.

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    • Remove the face of the device. You may need to jiggle it a little to get it off.

    • Once you see the grease, it should appear to be speckled with either dirt particles, fragments of metal, or look dark and lumpy. If you grease does not look like this, then you do not need to replace it.

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    • Use a metal spudger to scrape the old grease from the cavity.

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    • Blow compressed air into the device to make sure it is completely clean.

    • Squeeze in enough grease to fill the indents inside of the cavity.

    • Use a metal spudger to spread the grease evenly across the face of the device.

    What type of grease do we use in hand grinder?

    Mani kumar baraily -

    Please help me to know what type of grease it is or what should be the base of the grease to be used in hand grinder.

    Mani kumar baraily -

    Those instructions are malicious. Not everyone will realize that it very much matter what type of grease you put in there. It will need to cope with high speed, friction and heat. If it doesn't then you'll burn out the gear.

    I suggest you update the article with recommended grease or at least mention this.

    Ifektit -

    Mam, Miss, Madame:

    PLEASE provide the EXACT part#.of the yellow grease you show in your pictures.

    Thank you,

    Brett Yenzer

    Sacramento, CA

    byenzer -

Conclusion

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

Author

Laura Ann Jagels

Member since: 01/04/15

490 Reputation

5 comments

Hi, what is the recommended grease?

Robert Chua -

Hi. You’re great.

William Diffin -

Can I use white lithium grease. Thanks my brushes appear to about half an inch long if the grease doesn’t work going to try them????

Dan Faerber -

Angle grinders use a PAO lithium soap grease. Most use Nye Lubricants RheoLube 380, which is hard to source or expensive to buy.

You may substitute with Dupont Molykote G4700 grease. ereplacementParts.com has the Nye grease.

Emilio Gonzalez -

Hi, I’m trying to replace the spindle of my ga4030 with the one from the ga4530, to effectively make it into a 4-1/2” model. Looking at the parts list for both of these grinders, it appears they are identical except for the spindle, disc retaining nuts, and wheel shroud/guard. Do you know if this mod is possible? It looks like I would just need to remove that small bearing that’s pressed on to the top of the spindle.

Drew -