Bosch GBH 2-26 DFR Rotary Hammer - No Stroke Issue, Replaced Parts 321/59, 321/58, 321/60

Question

Hello, I got a damaged Bosch 2-26 DFR rotary hammer. After replacing the brushes she started, but with virtually no stroke. I replaced the following: 321/59, 321/58, 321/60, 26/56, bearing on the 3/14 rotor, plate 48 and bearing underneath.

Everything folded and greased but no impact. What else could I miss?

TomekB123 · Answer

The spire (321/28) whole? Not very vaulted? For verification elements No. 823. Are teeth ok, also in the center of the self-aligning bearing. Is the bearing on the shaft (24) in the correct position.

lemur75 · Answer

I will check the dimensions and measure, I will make photos of cloves because they are actually a little worn. I found a photo with the dimensions of the needle to compare. Are these correct?

Furions · Answer

A colleague is good. 823 for the first fire and then see if you have put the function switch right ...

Jacek1983rr · Answer

I would bet on grease (consistency of grease). I use the original and I have no problem. When replacing the seals, I always replace the element 833 and certainly obligatory 321/82 as it releases the losses will be greater.

lemur75 · Answer

I used Lubriten EPS-1 supposedly suitable.

robokop · Answer

And the piston in the sleeve slides at all? Because with too tight O-ring and thick grease it will stand in this sleeve.

lemur75 · Answer

The piston can be pushed with a finger and then returns. Feel the pressure under the piston. I send pics. The bearing on the shaft 24 is 4.5mm from the rack.

TomekB123 · Answer

The item in picture 4 is weak. The teeth should not be cut off, and the bearing on this shaft would move closer to the rack.

Narzędzia Bosch · Answer

The heart of the stroke is the swivel bearing, which causes the piston to reciprocate. The drive for this bearing from the rotor is transmitted by a gear with a claw clutch. This clutch may have worn down, which simply slips and is less effective. These hammers also require proper lubrication. The most appropriate solution in this situation would be for the tool to review the authorized service.

Maxiuk · Answer

Hello, I have 2 questions about the topic. Should the piston go in lightly because I feel so hard lubricated to the extent that I had to drive it with copper. Once it is in its place, you can feel it springing up the cylinder, there is no noticeable burr inside. On the outside, it does not end with a cone, it has light burrs. New O-ring. As for the spire it is chipped at the end and probably for this I have damaged this little O-ring on it but it is not a problem. I think that was the reason for the leakage of grease. A colleague gave the length of the needle 69.6mm mine is 66mm but it is probably impossible for so much to stand out besides you can see this chamfer at the end. Can I use Eps-1 Lubriten grease? I add pictures greetings

TomekB123 · Answer

You have a damaged aluminum cylinder. It hits element 833, which should not take place. To view the entire interior of the steel cylinder. The circlip is probably truncated.

Maxiuk · Answer

In fact, my friend Lemur, I pushed out the needles with a screwdriver. This ring did not hold at all and is not round and I was wondering which side should be ehh. The latter in the photo is probably also to be replaced? What about the other questions?

Kamilpl123 · Answer

I would exchange a spire, 3 mm too short, additionally broken.
What do the elements 833, 321/46 look like?
The aluminum cylinder includes various other elements, the whole designation 26, the cost at the Bosch store, some 52 zlotys.
Take a look at the sleeve from part group 821 inside.
It is best to use a grease dedicated for the tool, you will easily get these 40 g at the first best power tool service, stores also have it.

Narzędzia Bosch · Answer

The piston should come in lightly, but tightly with a noticeable compression of the compressed air underneath it. The piston, as well as other transmission elements, should be lubricated with grease recommended by the manufacturer no. cat. BOSCH 1615430001. The spire in this condition should be replaced. You can possibly grind the tip so that it does not cut the seal. However, it is already much shorter, which makes the impact transfer efficiency much smaller.

Maxiuk · Answer

Okay, I will buy a piston cylinder and a needle thanks for the advice. I'll set up the new O-rings, tell me what the round rings are supposed to be round or I'll call the service center and ask if the new one is round? And also the question of this grease how much to pack it there somewhere I read that 30g?

Narzędzia Bosch · Answer

Please contact our service hotline at (22) 715 44 50 or (22) 715 44 60, we will answer all questions regarding repairs and service of spare parts for Bosch power tools.

Andrew · Answer

Hello

I am in the process of repairing / regenerating a 2 24 DSR drill - weak stroke, mechanical looks undamaged.
Certainly for replacement: O-rings in the piston part and bearings on the rotor, bearing in the housing and on the small axis from the ball drive.
Are the rubber O-ring markings known and are the bearings and seal (large) in the housing replaced behind the handle?

Thank you in advance for your information and best regards

Andrew

lemur75 · Answer

You can find all elements Here . If the bearings are worn, they probably need to be replaced. They are not cheap. I mentioned in my all sealants and it is tiny and the drill works cool. For home use.

Narzędzia Bosch · Answer

The large bearing and sealant can be replaced. Rotor bearings are typical and available everywhere. Other parts that should be replaced after such a run have the following catalog numbers: 1610210187, 1610210104, 1610210105, 1610290029, 1614601024, 1613124040, 1610283019, 1610913010, 1610905016, 1610910073.

Bosch GBH 2-26 DFR Rotary Hammer - No Stroke Issue, Replaced Parts 321/59, 321/58, 321/60

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