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Matbro TS270 relief valve constantly blowing.
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<blockquote data-quote="ACEngineering" data-source="post: 7758759" data-attributes="member: 13308"><p>You will hear the engine tone change regualar as and when it charges the brake accumulator which is normal.</p><p></p><p>Your problem is either within the steering priority valve, possibly a stuck spool or the brake charge valve screwed in to the steering valve is faulty or you have a major leak on the brake circuit dumping oil to tank, this will be caused by a worn out brake pedal valve and will meant the brake charge valve is constantly wanting to try and charge the brake circuit.</p><p></p><p>you can test the pedal by removing the hose on the back of the pedal valve, the top hose is return to tank so remove that and run the machine and no oil should be leaking out of the brake pedal.</p><p>(the bottom hose is the presure in and the hose on the front of pedal valve is the one going to the axles)</p><p></p><p>It could of cause be a worn out hydraulic pump thats so bad it cant get the brake pressure up enough to kick the brake charge valve off.</p><p></p><p>Matbro hydraulics are a pain in the arse, one problem often has multiple causes so ometimes the only way to fix them is chuck all the parts at it, often once one fails like the main relief valve on the spool block it ha a knock on effect on the rest of it and destorys the pump whihc then send metal everywhere and knackers the teering priority valve etc!</p><p></p><p>Worse case</p><p></p><p>Pump</p><p>Hydraulic tank clean and filters</p><p>main relief valve on the main spool block and reseal each slice.</p><p>steering priority valve comes complete with brake charge valve</p><p>brake pedal valve</p></blockquote><p></p>
[QUOTE="ACEngineering, post: 7758759, member: 13308"] You will hear the engine tone change regualar as and when it charges the brake accumulator which is normal. Your problem is either within the steering priority valve, possibly a stuck spool or the brake charge valve screwed in to the steering valve is faulty or you have a major leak on the brake circuit dumping oil to tank, this will be caused by a worn out brake pedal valve and will meant the brake charge valve is constantly wanting to try and charge the brake circuit. you can test the pedal by removing the hose on the back of the pedal valve, the top hose is return to tank so remove that and run the machine and no oil should be leaking out of the brake pedal. (the bottom hose is the presure in and the hose on the front of pedal valve is the one going to the axles) It could of cause be a worn out hydraulic pump thats so bad it cant get the brake pressure up enough to kick the brake charge valve off. Matbro hydraulics are a pain in the arse, one problem often has multiple causes so ometimes the only way to fix them is chuck all the parts at it, often once one fails like the main relief valve on the spool block it ha a knock on effect on the rest of it and destorys the pump whihc then send metal everywhere and knackers the teering priority valve etc! Worse case Pump Hydraulic tank clean and filters main relief valve on the main spool block and reseal each slice. steering priority valve comes complete with brake charge valve brake pedal valve [/QUOTE]
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Matbro TS270 relief valve constantly blowing.
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