172A69-73300 final drive for Yanmar SV100-2B SV100-2A-2PB SV100-2A SV100-1A SV100-1 excavator
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+86 199 2461 6345
China
China
China
China
China
China
China
Poland, Koziegłowy
Romania, Bucharest
Romania, Bucharest
Romania, Bucharest
Romania, Bucharest
Romania, Bucharest
Romania, Bucharest
Romania, Bucharest
Romania
Poland, Koziegłowy
Romania, Maramures
Romania, Bucharest
Romania, Bucharest
1. GENERAL IDENTIFICATION
Machine Models: Yanmar SV100, SV100-1, SV100-1A, SV100-2A, SV100-2A-2PB, SV100-2B
Yanmar Part Number: 172A69-73300 (Assy)
Core Component: Travel Motor (Piston type) + Planetary Gearbox (Reduction unit)
Common OEM Cross-Ref: Nachi PHV-120-102-1-8502A (Verify against your specific ID plate)
2. PERFORMANCE SPECIFICATIONS
Motor Type: Two-speed axial piston motor with integrated swashplate control.
Reduction Ratio: High-ratio 2-stage or 3-stage planetary reduction.
Braking: Spring-applied, hydraulic-release parking brake (Friction plate type).
Relief Settings: Standard 32.0 MPa (4,641 PSI).
3. MECHANICAL INTERFACE
Sprocket Mounting: Heavy-duty bolt pattern (typically 12 to 16 bolts for the 10-ton class).
Frame Mounting: Circular flange with precision-drilled mounting holes.
Hydraulic Porting:
A & B Ports: High-pressure main travel lines.
Dr (Drain): Case drain line (Must be clear of obstructions).
P (Pilot): 2nd speed shift signal port.
4. INTERNAL GEARBOX COMPONENTS
If you are repairing the gearbox section rather than replacing the whole unit, these are the primary wear items:
Sun Gears: Central drive gears for the 1st and 2nd stages.
Planetary Carriers: The cages holding the planet gears.
Floating Seal (Duo-Cone Seal): The critical seal that separates the gear oil from the outside environment.
Main Hub Bearings: Large-diameter bearings that support the weight of the machine and the tension of the tracks.
5. MAINTENANCE PROTOCOL
Gear Oil Grade: SAE 90 or 80W-90 (API GL-4 or GL-5).
Oil Volume: Approx. 1.8 – 2.2 Liters (Check level via the "Level" plug at the 3 o'clock or 9 o'clock position).
Change Interval: Every 500–1,000 hours (Initial change at 250 hours for new units).
Critical Warning: If you see hydraulic oil leaking from the gearbox "Level" plug, the motor shaft seal has failed, allowing high-pressure hydraulic oil to over-pressurize the gearbox.