507-6562 521-3340 521-3341 5076562 5213340 5213341 318E 318F 323D2 and With 6-12 months warranty，Any quality problem will send free parts to repair. And this model Final Drive used for excavator hitachi

521-3340 521-3341 333-2951 441-3007 5213340 5213341 3332951 4413007 323E and With 6-12 months warranty，Any quality problem will send free parts to repair. And this model Final Drive used for excavator hitachi