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Hello Tony.

[ATTACH]1771[/ATTACH]
First try to screw a litle bit harder the red market screw - this makes the hand throttle a little tighter.
If that doesnt help, take a look at the Brake disc (green) and the small plate spring next to it to see if they are still OK.

Wirings diagram do you have found I think.
[URL unfurl="true"]https://zetorworld.com/threads/zetor-zts-wiring-diagrams.5720/[/URL]
You can check the ignition switch and the start protection switch on the clutch pedal.

But the brake fluid reservoir is still full?
Is the brake fluid still light and clear?

If the clutch slave cylinder (bottom, left side of the tractor on the clutch bell) is not leaking, it should be OK. The master cylinder is located behind the clutch pedal and is quite easy to replace or reseal. A new clutch master cylinder costs around 27 euros in Europe and a sealing kit around 15 euros.
You should also stick with DOT 3 brake fluid and not use DOT 4 or silicone.

I have a repair workshop book for Zetor 3320 to 7340 - but its in German but with many grafics. I can send you this PDF if its helpfull or an other one have it in english and can send it to you...

<blockquote data-quote="Joachim" data-source="post: 24948" data-attributes="member: 2329">Hello Tony.[ATTACH]1771[/ATTACH]First try to screw a litle bit harder the red market screw - this makes the hand throttle a little tighter.If that doesnt help, take a look at the Brake disc (green) and the small plate spring next to it to see if they are still OK.Wirings diagram do you have found I think. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />[URL unfurl=&quot;true&quot;]https://zetorworld.com/threads/zetor-zts-wiring-diagrams.5720/[/URL]You can check the ignition switch and the start protection switch on the clutch pedal.But the brake fluid reservoir is still full?Is the brake fluid still light and clear?If the clutch slave cylinder (bottom, left side of the tractor on the clutch bell) is not leaking, it should be OK. The master cylinder is located behind the clutch pedal and is quite easy to replace or reseal. A new clutch master cylinder costs around 27 euros in Europe and a sealing kit around 15 euros.You should also stick with DOT 3 brake fluid and not use DOT 4 or silicone.I have a repair workshop book for Zetor 3320 to 7340 - but its in German but with many grafics. I can send you this PDF if its helpfull or an other one have it in english and can send it to you... <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" /></blockquote>

[QUOTE="Joachim, post: 24948, member: 2329"] Hello Tony. [ATTACH]1771[/ATTACH] First try to screw a litle bit harder the red market screw - this makes the hand throttle a little tighter. If that doesnt help, take a look at the Brake disc (green) and the small plate spring next to it to see if they are still OK. Wirings diagram do you have found I think. :-) [URL unfurl="true"]https://zetorworld.com/threads/zetor-zts-wiring-diagrams.5720/[/URL] You can check the ignition switch and the start protection switch on the clutch pedal. But the brake fluid reservoir is still full? Is the brake fluid still light and clear? If the clutch slave cylinder (bottom, left side of the tractor on the clutch bell) is not leaking, it should be OK. The master cylinder is located behind the clutch pedal and is quite easy to replace or reseal. A new clutch master cylinder costs around 27 euros in Europe and a sealing kit around 15 euros. You should also stick with DOT 3 brake fluid and not use DOT 4 or silicone. I have a repair workshop book for Zetor 3320 to 7340 - but its in German but with many grafics. I can send you this PDF if its helpfull or an other one have it in english and can send it to you... :-) [/QUOTE]

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