Graphite 58G859 - rotary hammer - what kind of grease at service

Hello,

I have this rotary hammer for some time and I have read in the instructions that every 50 hours you should add the grease from the top to the gearbox from the set. Unfortunately I lost this lubricant. The manual does not say what lubricant it is or how much to apply. The only thing that was written is that it can be replaced with high-temperature grease. So I entered "high temperature grease" and leT-4S2 popped out and ordered.
Now I have doubts whether a given lubricant is suitable for a transmission. If it is not suitable, is Lubriten EPS 1 suitable?
And how much should it be put on the gearbox? Is one grease suitable for lubricating the entire mechanism as if I would dismantle the drill in parts in the future? If łt-4s2 is not suitable for a gearbox, is it even suitable for a spindle?

Read:
https://www.elektroda.pl/rtvforum/topic1820324.html
For my part, I recommend makita 183477-5.

Hey traffic jams

I am an employee of the Topex Group and I will be happy to advise you on the selection of the right grease for our rotary hammer.

The grease you mentioned - ŁT4S2 has mineral additives and temperatures up to 120 degrees - in this case it is not the best solution. Could use here a grease up to 130 degrees and without conditioners.

Our service uses ŁT43 lithium grease for gears in rotary drills. It can also be used to assemble the percussion mechanism - but do not overdo it here with the amount that in this part of the device can harm the mechanism. There should not be too much grease in the gearbox, because its excess can cause it to pass through the sealants, even to the impeller, and this can cause a malfunction.

When it comes to how much grease you need to apply - it all depends on the amount visible in the inspection hole. It must be seen that the grease is present, scattered but never under the cork! It's best not to add more than 5g and check the condition again after some time. So if you see that the grease is and you have not seen it flow out of the device during operation (e.g. with a handle), you may not need to add it to the gearbox.

The handle also has rather a lubricant without additives, and only a bit - a small dot at the end of the SDS shaft. The grease will disperse itself, there is no need to lubricate the side of the drill. The grease in this part lubricates, but also protects against the ingress of dust into the mechanism. Every now and then we order cleaning the chuck (but rather mechanically than using penetrators) and after that, a drop of grease on the drill shaft is enough.

I hope I helped.
If you have any more questions, write boldly

Regards,
Tomek

Thanks so much for the specific answer I was hoping for!
I have two more questions.

1. When should I service the hammer drill? What are the symptoms? I have no idea how much I have worked through it, and I would like to take care of it at the right time. Wait for some symptom or better prophylactically sooner?

2. What will I need to service the mechanism in the hammer drill? Any specific stroke piston grease?

korky,
I'm glad I could help

Answering your next questions:

Ad. 1
The impact mechanism should be looked at when we feel that there is no longer such an impact as it once was. Sometimes you can also see that a lot of grease flows out of the handle, and it decreases in the gearbox. These are signs of used sealants on the percussion mechanism and this is the reason for reviewing the mechanism. We dismantle, clean, install new sealants and assemble using appropriate but not too much grease. On the other hand, if there are no signs that something is wrong, you can review the mechanism when you change the brushes. Not necessarily at the first replacement (especially if there are not too much leaks and the impact is correct), but at the second it will probably be necessary to carry out a complete inspection - a mechanism with cleaning, replacement of seals and lubrication, and checking the gears and bearings in the drive. If you can do this review yourself - great. If you are not sure, I would advise you to hand over the tool to specialists.

Ad. 2
As I wrote before, it can be ŁT43. Of course, you will need new sealants and some tools to detach the circlips (perhaps a new seal). If these are not specialized tools, you need a bit of cunning and a good understanding of the mechanism. So let's have a look at the service drawing, available at: https://gtxservice.pl/mlot-udarowy-graphite-58g859.html

I wish the tool worked long, efficiently and required as little repair as possible

Regards,
Tomek

Thanks a lot for the factual answer, which means I still have some time to review. I looked into the brushes, even the original ones do not need to be replaced. When the time comes, it will follow your instructions. Thanks again and Merry Christmas good man