ناقل الحركة النهائي Kubota PHV-1B-12B لـ حفارة صغيرة Kubota KX36-3 K008-3 KX41-2 KX41-2V KX41-3

TECHNICAL DATA SHEET: KUBOTA K & KX SERIES FINAL DRIVE

1. GENERAL IDENTIFICATION

Machine Models: * K-Series: K008-3 (Micro)

KX-Series: KX36-3, KX41-2, KX41-2V, KX41-3

OEM Manufacturer: Nachi-Fujikoshi (Japan)

OEM Model Series: PHV-1B-12B

Kubota Genuine Part Numbers (Cross-Reference):

RG101-61290 / RG038-61290: (Standard for KX41-2 / KX36-3)

RG108-61290 / RG108-61270 / RG108-72000: (Standard for KX41-3 series)

RB208-61290 / RB238-61292: (Common for K008-3 / U15 series)

RA251-61291 / RA251-61292: (Updated versions for enhanced sealing)

2. PERFORMANCE SPECIFICATIONS

Motor Type: Two-speed Variable Displacement Axial Piston Motor.

Reduction Type: 2-Stage Integrated Planetary Gearbox.

Max Operating Pressure: 21.0 MPa (3,045 PSI).

High/Low Displacement: Specifically valved for machines under 1,800 kg.

Braking: Spring-applied, hydraulic-release mechanical parking brake.

3. MECHANICAL INTERFACE (INSTALLATION DATA)

Sprocket Mounting: Typically a 9-bolt pattern for these compact models.

Frame Mounting: Circular flange. Note: On the KX41-2V (Variable track), ensure the hydraulic hose clearance matches the telescopic frame.

Hydraulic Port Connections:

Inlet/Outlet (Main): Forward and Reverse flow.

Pilot (Change): Port for shifting between low and high speed.

Case Drain (Tank): Low-pressure return port. Crucial: Never plug this port; it must return to the hydraulic tank.

4. INTERNAL REPAIR COMPONENTS

Rotary Group: Cylinder block, 9 pistons, valve plate, and swashplate.

Planetary Set: Sun gear and three planet gears per stage.

Floating Seal (Duo-Cone): The critical interface that keeps gear oil in and dirt out.

Main Bearings: Large-diameter ball bearings supporting the rotating hub.

5. MAINTENANCE & INSTALLATION PROTOCOL

Gear Oil Grade: SAE 90 or 80W-90 (API GL-4 or GL-5).

Oil Capacity: Approx. 0.3 - 0.4 Liters.

Warning: Because the volume is so small, even a minor leak will lead to gear seizure within hours of operation.

Case Drain Safety: Before starting, ensure the case drain line is clear. Excessive pressure here will pop the main shaft seal, causing hydraulic oil to contaminate the gearbox.

Mounting Bolts: Use Loctite and torque to factory specifications to prevent bolts from shearing during counter-rotation.