Hitachi ZX230 Travel Gearbox 2nd Planetary Carrier Spider With Sun Gear Assy For Excavator Parts 3085985 1027161 3085941

This 2nd-stage planetary carrier spider integrated sun gear assembly is a key reduction component fitted inside the travel final drive gearbox of Hitachi ZX230 medium excavator, with corresponding part numbers 3085985, 1027161 and 3085941. Matched with planetary pinions and ring gear, the assembly reduces the high-speed rotation output from the travel motor and amplifies torque to deliver stable driving force for crawler tracks. It serves as an ideal replacement part for overhauling travel reducers on ZX230 units working in municipal engineering, earthmoving projects, rock loading and site leveling. This aftermarket gear assembly is widely trusted by field repair workshops, excavator rental operators and cross-border suppliers specializing in Hitachi construction machinery spare parts.
Long-term heavy-duty operation, frequent shock loads during uphill travel, plus degraded and contaminated gear oil will gradually trigger gear tooth pitting, carrier spider distortion, spline wear and metal debris accumulation inside the gearbox. Typical failure manifestations include insufficient track traction, sluggish travel speed under heavy loads, persistent grinding or clicking noise within the final drive, unilateral track deviation and abnormal gearbox temperature rise. Once the 2nd stage planetary carrier and sun gear suffer severe damage, the whole reduction mechanism may jam, resulting in machine immobilization, expensive emergency repair fees and delayed construction schedules.
Our planetary carrier spider & sun gear assembly is machined strictly according to OEM drawing specifications. Gear tooth profile, spline dimension, mounting hole pitch and assembly tolerance fully align with original component standards. No cutting, reaming or other modification work is needed during field installation, allowing service technicians to swap out the worn assembly rapidly and restore normal travelling performance. Compared with genuine spare parts marked with high prices and long lead times, this replacement assembly maintains reliable transmission stability and supports bulk repeat purchasing for merchants focusing on Hitachi medium excavator travel gearbox components.

1. Precise OEM dimension matching for quick on-site repair All mounting sizes, spline parameters and gear tooth profile keep 1:1 consistency with original parts. It fits seamlessly inside Hitachi ZX230 travel gearbox, helping mechanics complete overhaul without secondary machining and shorten machine downtime.
2. Reinforced gear structure for rugged construction sites Gear teeth and planetary carrier adopt deep carburizing and quenching craft to boost surface hardness and impact resistance. It can withstand cyclic impact loads generated during turning and climbing on uneven ground, lowering risks of tooth chipping and premature abrasion.
3. Layered quality inspection before shipment Each finished assembly will go through gear meshing test, dimensional verification and noise check before packing. Defective products are eliminated at factory inspection stage, minimizing rework risk and preventing sudden travel system failure at job sites.
4. Cost-effective aftermarket solution for fleet maintenance Genuine planetary transmission parts come with high procurement cost and unstable stock availability. Our factory direct supply balances reliable quality and competitive pricing, helping equipment owners reduce total maintenance expenditure for Hitachi excavator fleets.
5. Flexible logistics options to satisfy various order demands In-stock items support prompt shipment once payment is confirmed. Air freight can be arranged for urgent breakdown orders. Sea consolidation and full container service are available for bulk buyers to cut comprehensive logistics cost.

Our manufacturing plant focuses on R&D and mass manufacturing of planetary carrier, sun gear and matched gear assemblies for excavator travel reduction gearbox. We maintain complete production workflows including alloy forging, precision machining, heat treatment and finished product testing. Cyclic load simulation tests are implemented to verify component durability under real earthmoving and quarry working environments. Our travel gearbox spare parts are exported to multiple overseas regions, and we have built long-term stable partnerships with global construction machinery spare part wholesalers.

Q1: Can this 2nd planetary carrier sun gear assembly fit other Hitachi excavator models? A1: Cross-model installation is not recommended. Different stages of travel gearbox have different gear tooth counts and spline specifications. Please double-check machine model and part numbers before placing orders.
Q2: What travel malfunctions can this assembly resolve? A2: It fixes travel faults caused by worn 2nd stage planetary components: weak traction, slow traveling speed, internal gear grinding noise, track deviation and travel gearbox overheating.
Q3: Is volume discount available for bulk purchase? A3: Yes, preferential price depends on purchasing quantity. We can arrange full container sea shipment to reduce logistics expenditure.
Q4: What packaging is adopted for long-distance ocean shipping? A4: Anti-rust oil is coated on all gear tooth surfaces. The assembly is wrapped with waterproof anti-rust film and shock-absorbing foam, then fixed inside reinforced plywood case to protect precision parts from collision and rust during overseas transit.