Kubota PHV-1B-12B final drive for Kubota KX36-3 K008-3 KX41-2 KX41-2V KX41-3 mini excavator
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The most common type of fraud. Unfair sellers may request a certain amount of advance payment to “book” your right to purchase equipment. Thus, fraudsters can collect a large amount and disappear, no longer get in touch.
- Transfer of prepayment to the card
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- Transfer to the “Trustee” account
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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.