... .Payment terms for BLT60 hydraulic hammer(1) T/T payment at sight-30% of payment in advance, and 70% of ... or (1500 hrs): Cylinder,Piston,Valve, Back head *(2) 06 month or (1000 hrs): Front head *(3) 03 month or ... .(2) On a hard or large rock, start breaking at an edge. Even a hard and big rock can be ... relatively easily broken when hammering begins at a crack or an edge.(3) Do not allow ...