Dear Brother
I have consulted with the mechanic
He has suggested below things
One first phase
01) On front tires, he said we need to change the Tawa, he said better to change the complete set Tawa/disks
02) On rear tires he said the leathers are weak you should change that one too.
03) He will change the Oil again.
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He said, there are 70 to 80 percent chances that brake will work perfectly alright on above things, if not then he said the below things in second phase
01) Change of Serva, plus cylinder !
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Please advise !