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Brake question for using a trailer on roads.
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<blockquote data-quote="Captain Sensible" data-source="post: 7968987" data-attributes="member: 107484"><p>I fear you may be about to encounter a 'challenge'. I'm not certain, but I doubt if the (55 hp, 'Compact') Foton tractor will be fitted with a tractor-trailer brake control valve (TTBV) ...... (a hydraulic supply valve linked to the tractor's braking circuit which supplies hydraulic pressure to operate the trailer's brakes <u>in proportion</u> to how hard the tractor's brakes are applied). You can't control a trailer's brakes properly with a normal tractor spool valve because you can't vary/control the pressure supplied, only the flow. Consequently the trailer's brakes would be 'digital' .... either 'On' or 'Off' <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite10" alt=":oops:" title="Oops! :oops:" loading="lazy" data-shortname=":oops:" /> </p><p></p><p>Also the normal spool valves will deliver too great a pressure .... The trailer brakes don't want more than ~2000 psi / 150 bar.</p><p></p><p>If your tractor is fitted with a TTBV ... No problem.</p><p></p><p>Good luck!</p></blockquote><p></p>
[QUOTE="Captain Sensible, post: 7968987, member: 107484"] I fear you may be about to encounter a 'challenge'. I'm not certain, but I doubt if the (55 hp, 'Compact') Foton tractor will be fitted with a tractor-trailer brake control valve (TTBV) ...... (a hydraulic supply valve linked to the tractor's braking circuit which supplies hydraulic pressure to operate the trailer's brakes [U]in proportion[/U] to how hard the tractor's brakes are applied). You can't control a trailer's brakes properly with a normal tractor spool valve because you can't vary/control the pressure supplied, only the flow. Consequently the trailer's brakes would be 'digital' .... either 'On' or 'Off' :oops: Also the normal spool valves will deliver too great a pressure .... The trailer brakes don't want more than ~2000 psi / 150 bar. If your tractor is fitted with a TTBV ... No problem. Good luck! [/QUOTE]
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Brake question for using a trailer on roads.
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