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Thread: circular saw revision
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23rd October 2021, 02:49 AM #1Novice
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circular saw revision
Hello ! I have a old Makita 5604R circular saw and I disassembled it and I checked the components inside. Also, I found a lot of dust inside, and I made a general cleaning of the components.
Before disassembling the tool, I started it by pressing the button, and it worked, but I wanted to make a revision.
I would like to know:
1. which of the components needs to be replaced when making a revision of the tool ?
2. what kind of lubricant I need to use for this type of tool ?
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23rd October 2021 02:49 AM # ADSGoogle Adsense Advertisement
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23rd October 2021, 03:28 PM #2China
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The only component that would require lubrication would be bearings, but in you case I would think they are sealed so don't require lubrication, unless they are fault in which you would need to replace them.
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24th October 2021, 10:50 AM #3
I replaced the bearings in my very old makita saw some years ago and can confirm they are sealed so no lube required.
Regards
John
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27th October 2021, 02:37 AM #4Novice
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I was told to use general purpose lithium grease (high temperature and high speed grease) for the inside gears of the circular saw. I assembled the saw and I saw that after about 10-20 seconds of work with no load, only the blade, the area were the gears are located is a little bit warm. It is normal ?
Also, I found that the carbon brushes makes sparks like in the image: carbon-brushes — ImgBB . I cleaned the armature and the brushes using sand paper, before assembling back the saw. Is the dimension of the sparks also normal ?
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25th November 2021, 02:29 PM #5Senior Member
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- Jan 2006
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- United States Of America
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It it was running cooler when new something may be wrong.
When taking apart power tools I always check the carbon brushes and gently clean the commutator if necessary. Check the bearings by giving the threaded shaft a push and pull in and out. Special electrical cleaning spray is available. Make sure its for delicate or sensitive electronics.The manufacturer will tell you what grease to use.
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26th November 2021, 05:09 PM #6Senior Member
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The gearbox will overheat if it is filled with grease, caused by the friction of the grease being churned. The amount of grease required is in the region of 1/4 to 1/3 full. This means the gears can pick-up lubricant as required but are not immersed in it.
Chas.
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