470-8770 501-7238 4708770 5017238 336D2 em will send free parts to repair. And this model Final Drive used for excavator hitachi

501-7238 501-7239 507-9337 5017238 5017239 5079337 335F 336E and With 6-12 months warranty，Any quality problem will send free parts to repair. And this model Final Drive used for excavator hitachi