OEM-specification Hitachi Ball Bearing. Part number 4395453. Compatible with Hitachi Ex300 5 Ex345Usr Ex350H 5 Ex370 5M Zx330 Zx330 3 Zx350 3 Zx350H Zx400W 3 Zx500W.
Always verify with serial number before ordering.
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Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.
Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.
