OTTO Excavator Spare Parts Fvr34 6Hk1 Oil Overflow Valve 8943991700 894399-1700 8-94399170-0 For Isuzu This product is an oil overflow valve designed for the Isuzu engine model 6HK1 in the FVR34 application. The part numbers associated with it are 8943991700, 894399-1700, and 8-94399170-0. This valve serves a crucial function in managing oil pressure within the engine system, ensuring proper lubrication and performance in the specified equipment.