12-25-2018 06:02 AM
Our one unit G3520c during TEO we replaced its cylinder head part no 415-5584 its old cylinder head as ahipped were
315-2632 during during TEO we also replaced its rocker arm assenbly bearing P# 201-8300.
after 1500 operational hours its push rod found dry we replaced it 10 push rod gradually.
we found engine shut down on detonation several times . so we removed its rocker arm assemblied measured & observed 21 out of 40 worn out beyound the specifactions . can i get warranty from cat for this early wear.
i study & found some reasons to early wear that perivious cylinder head 315-2632 Spring inner 194-4902
Spring outer 281-6157 Mean while 415-5584 have Spring outer 281-6157 Spring outer 316-5976
As below chart 415-5584 cylinder head springs are longer than 315-2632 cylinder head springs & can take extra force to operate 415-5584 valves lead to early wear . any one from cat expert please advice