PCR-2B 266-6396 Swing Motor Assembly for Caterpillar 303.5 Excavator
PCR-2B 266-6396 Swing Motor Assembly for Caterpillar 303.5 Excavator - Image 2
PCR-2B 266-6396 Swing Motor Assembly for Caterpillar 303.5 Excavator - Image 3

PCR-2B 266-6396 Swing Motor Assembly for Caterpillar 303.5 Excavator

Searching to buy a Caterpillar 303.5 swing motor replacement because of upper carriage drift on side slopes, violent mechanical rebound shudder when centering the joystick tight against boundary walls, or gear oil leaking into your slewing ring bearing tub? The PCR-2B 266-6396 Swing Motor assembly with planetary reduction gearbox by Tatan is engineered specifically for 3.5-ton compact radius (CR) excavators. Pre-assembled with spring-applied wet multi-disc parking brakes, dual anti-reaction shock relief valves, and 20CrNiMo carburized planetary reduction gears, it locks holding torque at 20.6 MPa and restores smooth, precise slewing positioning with zero pipe alterations.

Need Pinion Tooth Count Confirmation & Direct OEM 266-6396 Swing Drive Price?

Contact Senior Hydraulic Specialist Gavin for free swing drive matching & machine serial-number double-check:

What Equipment Owners & Hydraulic Mechanics Get from Tatan:

  • Stops 3.5-Ton Superstructure Drift: Spring-applied wet multi-disc parking brakes lock the excavator upper house rigidly on 30-degree slopes immediately upon joystick neutral return.
  • Smooth Anti-Reaction Cushioned Braking: Built-in dual anti-rebound shock relief valves absorb rotational kinetic inertia, preventing gear tooth shear during rapid back-and-forth trench backfilling.
  • 100% Direct Bolt-On for CAT 303.5: Precision CNC-machined mounting flange, output pinion shaft, and port threads align directly with Caterpillar 266-6396 chassis lines right out of the crate.
  • Zero Gear Oil Contamination: Upgraded lower shaft mechanical face seals retain SAE 80W-90 gear lubricant and lock out slurry, dirt, and wash-down water from the planetary carrier.
  • Automated Test-Bench Certified: Full-load holding torque, 20.6 MPa relief cracking pressure, and casing drain flow rates 100% verified before crate packaging.
  • Backed by a 12-Month Warranty: Zero MOQ (1 PC accepted) with fast 3-7 day global air express or sea container freight options.
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Description

PCR-2B 266-6396 Swing Motor Assembly Overview

The PCR-2B 266-6396 Swing Motor assembly manufactured by Tatan is a compact axial piston hydraulic drive with integrated planetary reduction gearing belonging to our Swing Motor Assembly classification. Engineered specifically for Caterpillar CAT 303.5, 303.5C CR, 303.5D, and 303.5E compact radius mini excavators, replacing your worn swing drive with a Tatan complete assembly eliminates superstructure drifting on slopes, prevents sudden hydraulic stopping shocks, and cures internal casing bypass across demanding close-quarters utility applications.

Operating under direct pressure flow from the machine’s main hydraulic pump and routed through the main control valve assembly, this PCR-2B 266-6396 Swing Motor incorporates carburized alloy sun and planet gears, a hydraulic-release parking brake pack, and dual anti-rebound cushion valves, ensuring 100% direct bolt-on installation with turntable frames and chassis pilot lines.

⚠️ Pinion Shaft & Flange Verification: Caterpillar 303.5 series mini excavators feature specific swing pinion tooth profiles and mounting pilot diameters. Please send your original motor nameplate photo or count your output pinion teeth to Gavin for free verification before dispatch.

Key Attributes & Technical Parameters for PCR-2B 266-6396 Swing Motor

Product CategorySwing Motor AssemblyWarranty1 Year / 12 Months
Specific Valve ModelNachi PCR-2B / PCR-2B-10A Motor + Planetary GearboxBrand NameTatan
Compatible EquipmentCaterpillar CAT 303.5 | 303.5C CR | 303.5D | 303.5EOEM Part Number266-6396 / 163-9758 / 281-3052
Matched Engine SeriesMitsubishi S3Q2 / Cat C1.8 Diesel (23.6 kW)Place of OriginGuangdong, China
Max Relief Pressure20.6 MPa (206 bar / 2987 PSI Cushion Relief)Brake Release Pressure3.9 MPa (39 bar Pilot Hydraulic Line)
Spool Precision SpecMicro-Lapped Valve Plate < 0.003 mmQuality Status100% Brand New Motor & Gearbox Unit
Machinery Test ReportProvided (100% Bench Holding Tested)Video Outgoing-InspectionProvided Before Shipping
Gear Oil SpecSAE 80W-90 / SAE 85W-140 EPPackagingExport Wooden Box Packaging

Compact Machinery Hydraulic Drive & Swing Unit Inventory

Tatan maintains extensive stock of integrated swing devices, planetary reduction gearboxes, hydraulic piston motors, and replacement internal rotating groups for earthmoving machinery:

Tatan Construction Machinery Hydraulic Main Pumps Motors and Technical Support by Engineer Gavin

Supported Excavator Machinery Brands & Swing Drive Lineup

In addition to Caterpillar compact excavators, Tatan manufactures and supplies replacement swing hydraulic motors, planetary reduction gears, and slewing rings across global equipment brands:

Tatan Compatible Excavator Machinery Brands Display Caterpillar Komatsu Kobelco Hitachi Volvo Doosan

Application Scenarios & Buyer Value

When contractors search to compare Caterpillar 303.5 swing motor replacement cost and upgrade their machine with our PCR-2B 266-6396 Swing Motor, they secure measurable field reliability and lower maintenance overhead:

Application ScenarioValue Delivered to Buyer
CAT 303.5 Motor Replacement1:1 direct bolt-on installation eliminates carriage creep on side slopes and restores sharp boom swing acceleration.
Compact Machinery Repair WorkshopsAvoids the complex labor

* Note: Wholesale Reference Price Starts From $300.00. Please contact Gavin for a final customized quote.

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