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CAT 1850275 (185-0275) Piston Motor Parts | Fits 365C 988H 986K CS56B D10T2

CAT 1850275 (185-0275) Piston Motor Parts | Fits 365C 988H 986K CS56B D10T2

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✓ Premium Caterpillar Quality Spec  |  ✓ 100% Direct Fit  |  ✓ Fast Global Shipping

Premium hydraulic piston motor repair parts (rotary group assembly) designed as a direct OEM-compatible replacement for Caterpillar (CAT) heavy machinery. Precision-engineered to rebuild and overhaul hydraulic drive and swing motors, restoring original volumetric efficiency, torque output, and extended service life under severe construction, compaction, and earthmoving conditions.

Product Highlights

  • Part Number: 1850275 / 185-0275
  • Direct Fit OEM Replacement: Form, fit, and precision tolerances match original Caterpillar engineering specifications perfectly for seamless motor reassembly and rebuilds.
  • Heavy-Duty Construction: Manufactured with ultra-hardened steel alloys and wear-resistant internal precision components to handle high hydraulic operating pressures and continuous heavy torque loads.
  • Cost-Effective Overhaul Solution: Restores full hydraulic motor speed, drive power, and operational torque back to factory specifications at a fraction of the cost of replacing a complete motor assembly.

Technical Specifications

Parameter Specification
Part Number 1850275 / 185-0275
Product Type Piston Motor Repair Kit / Rotary Group Parts
Brand Compatibility Caterpillar (CAT)
Application Hydraulic Travel, Swing & Drive Motor Overhaul
Material High-Strength Precision Alloy Steel & Wear-Resistant Metals
Warranty 12 Months Warranty

Compatible Models & Equipment

These premium hydraulic piston motor replacement parts are precision-engineered to fit the following Caterpillar heavy equipment:

  • Hydraulic Excavators: Caterpillar 365B / 365B L / 365B II / 365C / 365C L / 365C L MH / 385B
  • Wheel Loaders: Caterpillar 982M / 986 / 986H / 986K / 988G / 988GC / 988H
  • Wheel Dozers & Compactors: Caterpillar 834G / 834H / 836G / 836H
  • Vibratory Soil Compactors: Caterpillar CP12 / CP14 / CP56B / CP68B / CP-56B / CP-68B / CS12 / CS13 / CS14 / CS56B / CS66B / CS68B / CS-56B / CS-66B / CS-68B
  • Track-Type Tractors (Dozers): Caterpillar D10T2

Key Applications

  • Hydraulic Motor Rebuilding: Replaces worn or damaged internal rotary group components including cylinder blocks, piston shoes, valve plates, retainer plates, and swashplate contacts.
  • Torque & Speed Restoration: Eliminates internal fluid bypass, sluggish track/wheel travel, insufficient drive torque, and noise caused by internal motor component wear.
  • Preventative Maintenance: Provides heavy equipment repair shops and field mechanics with precision-matched components for reliable scheduled motor overhauls.

Why Choose Our Aftermarket CAT Parts?

  • Guaranteed OEM Quality: Manufactured under strict ISO 9001 quality standards to match original Caterpillar factory dimensions, surface finishes, and hardness levels.
  • Cost-Effective Solution: Achieve premium dealer-level reliability and identical hydraulic performance at a fraction of the OEM replacement price.
  • Ready to Ship: Kept in stock for immediate worldwide dispatch to reduce your machine's idle downtime significantly.
  • Industry-Leading Support: Backed by a full 1-year warranty and a team of professional heavy machinery hydraulic technical experts.

Frequently Asked Questions (FAQ)

Q: Are these piston motor parts genuine Caterpillar items?

A: These are premium-grade, OEM-compatible aftermarket replacement parts. They are manufactured to exact CAT dimensional tolerances and technical specifications, serving as a direct drop-in replacement for part number 185-0275.

Q: What is covered under the 12-month warranty?

A: Our 12-month warranty fully covers all manufacturing defects, material failures, and workmanship issues under standard operating conditions.

Q: What precautions should be taken during installation?

A: Ensure the motor casing is completely flushed and cleaned of metallic particles. Always flush the main hydraulic system, install new hydraulic fluid filters, and pre-fill the motor case with fresh hydraulic oil prior to initial startup to protect internal precision components.

Q: How long does international shipping take?

A: In-stock orders are typically dispatched within 3–5 business days. We offer expedited shipping and global air freight options for emergency machine breakdown situations.


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