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

470-8770 501-7238 501-7239 4708770 5017238 5017239 336F and With 6-12 months warranty，Any quality problem will send free parts to repair. And this model Final Drive used for excavator hitachi

453-7463 470-8769 470-8770 4537463 4708769 4708770 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