Tender For supply of rock breaker spares - < supply of rock breaker spares > - electro hydraulic control valve asse. p-b600-6351, retainerpin. p.tno.:11057536. for rock breaker, retainer pin ring. pt. no:gh6-4000 for rock breaker, rock breaker boom.assembly-b601v with part no:b601-2007 as per drawing number:b601-8228