Deutz Brake Cylindern Disassembly

Introduction

One of the types of brake slave cylinder on this tractor is a hydraulically assisted type.

This uses 18 bar hydraulic fluid that actuates the brakes. A common problem is rust building up inside the hand brake mechanism. This is a disassembly guide since most manuals don't seem to show how. New cylinders are also very expensive.

Step 1 Overveiw

Deutz Brake Cylindern Disassembly, Overveiw: step 1, image 1 of 2

Deutz Brake Cylindern Disassembly, Overveiw: step 1, image 2 of 2

Here is all the parts removed so you have an ide of what is to come.

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Step 2

This is the cylinders placement on the center housing.

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Step 3

First we will remove the adjuster bolt, untighten the nut with 17mm spanner and then unscrew the bolt with a 8mm spanner.

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Step 4

Next remove the locking ring with lock ring pliers.
Flip the cylinder over.

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Step 5

Remove this bigger lock ring taking care since the spring is under some tension.

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Step 6

Deutz Brake Cylindern Disassembly: step 6, image 3 of 3

If your cylinder is in good condition you might be able to get the piston out with compressed air but mine is rusted in place.
So I used a greasegun and some special fittings. A brake pipe fitting threaded for a grease nipple.
Replace the air bleed nipple with the greasegun nipple.

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Step 7

Deutz Brake Cylindern Disassembly: step 7, image 3 of 3

Plug the hydraulic inlet and use the greasegun to force the parts out.
First comes the plunger that in this case was rusted in place.
Next the piston.

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Step 8

Deutz Brake Cylindern Disassembly: step 8, image 3 of 3

Next turn it over and use a 17mm spanner to remove the hand brake arm bolt.
Then using a scribe mark the end positions for the arm so you can get it back in the right rotation. Both the arm and the inner pusher have splines so this is a good thing to do.

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Step 9

Remove the arm and flip it top side upp.

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Step 10

Deutz Brake Cylindern Disassembly: step 10, image 3 of 3

The handbrake axle is locked by a small pin marked with the red arrow. I used a welder and a slidehammer to remove this.

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Step 11

Deutz Brake Cylindern Disassembly: step 11, image 3 of 3

Next use the slidehammer and a m10 threaded end to remove the habdbrake axle like in picture 2.

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Step 12

Remove the screw that stops the adjuster parts from rotating.

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Step 13

Deutz Brake Cylindern Disassembly: step 13, image 3 of 3

Now we will have to separate these two parts to get the handbrake actuator out.
Using a m10 bolt and a metric pipe thread I forced the to rotate in different directions which broke them free,

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