OTTO Excavator Parts Zx330 6Hk1 Valve Spring Big 8943958856 894395-8856 8-94395885-6 For Isuzu OTTO Isuzu ZX330 6HK1 Valve Spring Big 8943958856 – 100% genuine OEM excavator part, perfect fit for Isuzu 6HK1 engines. Bulk in-stock, fast global shipping. Superior elasticity & fatigue resistance vs aftermarket big springs, cuts rework & returns, boosts resale profits for wholesalers & agents.