Travel motor running but output torque is low or the machine drifts on slopes on your ZX200? A worn 1025787 travel ring gear loses tooth clearance, allowing planet gears to skip under load. RITO's heavy-duty ring gear restores full final-drive reduction ratio and tractive force.
Item NO.:
1025787-OTOrder(MOQ):
1pcsPayment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANShipping Port:
Huangpu,GuangzhouLead Time：
In Stock1025787 Travel Ring Gear for Hitachi ZX200 excavator final drive. The ring gear is the fixed outer element of the planetary set; precise tooth form and case-hardened surface are critical to absorbing the continuous cyclic loads of travel drive. Internal gear teeth are hobbed and shaved to AGMA 10 quality for silent, efficient torque transfer.
| Part Number | 1025787 |
|---|---|
| Part Name | Travel Ring Gear |
| Compatible Brand | Hitachi |
| Applicable Models | ZX200 Excavator Final Drive |
| Application | Fixed outer ring of the travel drive planetary reduction set |
| Material | Alloy steel, induction-hardened tooth surfaces |
| Product Color | Matte industrial finish |
| Working Temperature | -30°C~+80°C |
| Key Function | Provides the reaction member for planetary reduction to multiply motor torque at the sprocket |
| Condition | 100% New Aftermarket OEM Quality |
| Packaging | Wooden Case Reinforced Carton Neutral Packing Customized Box |
Surface hardness HRC 55-60 on tooth flanks with a tough unhardened core, balancing wear resistance and impact toughness for rock-strewn terrain.
Teeth hobbed and shaved to AGMA 10 for minimal transmission error, reducing noise and vibration during travel and preventing micro-pitting on planet gear faces.
Correct addendum and dedendum geometry maximises the contact ratio with planet gears, distributing load across a wider tooth face area.
Outer diameter machined to h6 for a controlled-interference fit inside the final drive housing, preventing ring gear rotation under shock load.
FAQ
Q: What are the symptoms of a worn 1025787 ring gear?
A: Listen for a low-pitched rumble or periodic clunk during travel on the ZX200, watch for unequal travel speed left to right, check for large metal chips in the final drive oil and inspect for measurable tooth-flank step wear.
Q: Do I need to replace planet gears when replacing the ring gear?
A: If the ring gear failed due to tooth fracture or severe pitting, the mating planet gear teeth are likely damaged too. Replace the full planetary set together to avoid transferring the load to already-weakened teeth.
Q: Can the ring gear be replaced without removing the final drive from the machine?
A: The final drive must be removed and partially disassembled to access the ring gear. Drain gearbox oil, inspect the sun gear and carrier for secondary damage before reassembly.
Q: How to confirm 1025787 fits my ZX200 final drive?
A: Match tooth count, module and outer housing bore diameter. Provide the machine serial number and final drive model to our team for confirmation.
Q: What quality options are available?
A: We provide original, OEM and high-quality aftermarket versions with stable supply capability.
Q:Why Choose RITO?
A:Listed Factory
Stable&Reliable Quality
OEM Factory for Chinese Top Excavator Brands
Supplier to Fortune 500 Companies
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