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Sany Genuine Travel Reducer Assembly GT40D50A-F1H1U Sany Part Number: 14431660 Suitable for Models: SY195, SY205, SY215, SY225, SY245, SY265 and other related models.
Place of Origin:China
Brand Name:Sany
Model Number:14431660
Minimum Order Quantity:1pcs
Price:Negotiable
Payment Terms:T/T,Western Union
Supply Ability:1-10000pcs
Product Description
Detailed Product Description for Sany Genuine Travel Reducer Assembly GT40D50A-F1H1U
Travel Reducer Assembly
Internal Planetary Structure
I. Basic Material Information
Full Product Name: Sany Final Drive Travel Reducer Assembly (Built-in Parking Brake + Two-Stage Planetary Reduction Structure)
Model No.: GT40D50A-F1H1U, Perfect Replacement for TM40
Sany Original Part Code: 14431660
Brand Affiliation: Original Matching Final Drive Assembly of SANY SOOT Transmission
Supply Status: In Stock, Packed in Wooden Case Packaging, US Dollar Price Negotiable
Applicable Excavator Models:
Sany Medium Tonnage Crawler Excavators: SY195, SY205, SY215, SY225, SY245, SY265
Matching Configuration: Directly connectable to original Sany travel piston motor; rotating housing output design, compatible with drive wheel and track assembly
II. Core Function Definition
The travel reducer (final drive) is the core power component of the excavator travel system. It receives high-speed, low-torque input power from the travel motor, drastically reduces rotating speed and amplifies output torque via a two-stage planetary gear reduction mechanism to drive the drive wheel rotation, enabling forward, backward and steering movement of the whole machine through tracks. Equipped with an integrated wet parking brake, it locks the travel mechanism after shutdown to prevent rolling on slopes and idling sliding, ensuring safety during slope parking and operation.
III. Overall Structure & Material Hierarchy
1. Overall Structural Layout (From Inside to Outside)
Travel Motor Input Flange → Parking Brake Assembly → First-Stage Planetary Reduction Mechanism → Second-Stage Planetary Reduction Mechanism → Output Ring Gear Housing → Heavy-Duty Main Support Bearing → Floating Oil Seal Assembly → Oil Drain / Oil Filler Assembly
2. Material & Heat Treatment Process for Key Components
- Sun Gear, Planet Gears, Internal Gear Ring: Made of premium 20CrMnTi alloy steel with integral carburizing quenching and precision gear grinding finishing. Tooth surface hardness reaches HRC58~62. Featuring outstanding impact resistance, pitting resistance and heavy-load wear resistance, it adapts to bumpy and impactive working conditions including earthmoving, muddy sites and mines, effectively preventing tooth breakage and edge chipping.
- Planet Carrier, Input & Output Shaft: Made of 40Cr alloy steel with quenching and tempering treatment plus precision turning and grinding. It boasts excellent bending resistance, torsion resistance and alternating load resistance, resisting distortion under heavy climbing loads and spline wear.
- Reducer Housing (Rotating Ring Gear Housing): Integrally cast from high-strength ductile iron with high overall rigidity, capable of resisting stone impact, extrusion deformation and muddy water corrosion.
- Parking Brake Friction Pair: Multi-piece wet copper-based powder metallurgy friction plates. Adopting normally closed spring brake and hydraulically released design, it delivers stable braking performance, high temperature resistance and uniform friction loss to avoid slipping during downhill braking.
- Sealing & Protection System: Structure composed of imported Trelleborg / Goetze floating oil seals, fluororubber skeleton oil seals and multi-layer dust retainers, blocking silt, muddy water and moisture intrusion to stop water ingress and gear oil leakage inside the housing.
- Main Support Bearings: Paired heavy-duty tapered roller bearings that simultaneously bear radial load, axial impact load and travel overturning moment, featuring stable operation, controllable clearance and long service life.
IV. Precise Technical Parameters
Transmission Type: Two-Stage Planetary Gear Reduction (D = Double Stage)
Nominal Reduction Ratio: 50.1
Rated Output Torque: 32600 N·m
Parking Brake Torque: 1285 N·m
Net Weight of Assembly: 281 kg
Overall Mounting Dimension: Φ472mm × 525mm
Input Mode: Splined direct connection with matched Sany travel motor, fully compatible with original interfaces
Full-Load Transmission Efficiency: 90%~93%, low power loss, powerful traveling performance and strong climbing torque
Applicable Operating Oil Temperature: -25℃ ~ +98℃, suitable for low-temperature construction in winter and long-time high-temperature heavy-duty operation in summer
Protection Class: IP65, resistant to silt, water splash and dust intrusion
Shift Characteristic: Compatible with high/low two-speed travel mode of the whole machine, automatically adjusting torque output for high-speed relocation and low-speed heavy-load climbing
V. Core Product Advantages
Original Precise Interchangeability
Exclusive Sany part code 14431660. Mounting bolt hole positions, spigot dimensions, spline specifications and end face dimensions are 100% compatible with SY195/SY205/SY215/SY225/SY245/SY265. No modification or adjusting shims required for direct disassembly, replacement and installation with zero assembly tolerance.
Reinforced Design for Medium-Tonnage Heavy Loads
Optimized for frequent climbing, dozing, mud escaping and heavy loading working conditions of 20–27-ton excavators. Enlarged gear safety margin improves impact fatigue strength, reduces failures such as gear tooth breakage and planet shaft fracture, and extends the overall service life of the final drive.
Safe & Reliable Parking Braking
Normally closed spring wet brake structure instantly locks travel once travel pressure oil is cut off, preventing rolling on steep slopes and jerky sliding during downhill start-stop to eliminate machine sliding risks. Brake friction plates feature good heat dissipation, resisting overheating and failure during long-time downhill braking.
Long-Lasting Leak-Proof Double Floating Oil Seal
Adopts special double floating oil seal structure dedicated to excavator final drives, solving common defects of traditional single oil seals including water & mud ingress, gear oil emulsification and shaft end leakage, greatly lowering maintenance frequency caused by oil leakage and water intrusion in later service period.
Convenient Maintenance
The housing is pre-reserved with dedicated oil filler, oil drain port and oil level plug for easy gear oil filling, level inspection and regular oil change. Modular design allows whole-unit replacement or separate disassembly & repair of wearing parts including gears, bearings, oil seals and friction plates to keep maintenance costs under control.
Mature Rotating Housing Structure
Mainstream final drive layout in the industry with compact structure and high space utilization. The main reducer body is arranged inside the drive wheel to reduce failure rate from external impact and collision, adapting to harsh construction site environments.
VI. Key Points for Installation & Replacement
- Pressure relief before disassembly: Release residual hydraulic pressure inside the travel circuit to prevent injury from high-pressure oil injection; cut off the main power supply for full safety protection.
- Disassembly steps: Jack up one side of the track, remove drive wheel cover, disconnect motor oil pipes, unfasten reducer fixing bolts, and lift out the old travel reducer assembly as a whole.
- Pre-assembly preparation: Clear iron filings, oil stains and rust on the mating surface of the travel frame, inspect wear condition of drive wheel inner bore, and install brand-new sealing gaskets and dust seals.
- Bolt tightening: After aligning and installing the reducer, tighten bolts diagonally in multiple steps strictly in accordance with original factory torque specifications to avoid unbalanced load and jamming.
- Lubricant filling: Fill dedicated construction machinery final drive gear oil to standard level after assembly and seal oil ports.
- Running-in & test run: Conduct 30-minute low-speed forward & reverse no-load running-in, check the housing for abnormal noise and oil leakage. Subsequently test straight travel, steering, climbing and parking brake functions. The assembly is qualified if no abnormal noise, oil leakage or rolling occurs.
VII. Common Faults, Causes & Hazards
Abnormal Travel Noise & Periodic Clattering Gear Meshing Noise
Causes: Gear wear & insufficient lubrication, foreign matter & water entering housing, bearing collapse, loose planet pin shaft
Hazard: Long-time faulty operation may crack ring gear and scrap the entire reducer assembly directly.
Weak Single-Side Travel, Slipping While Climbing, Pressure Build-Up & Overheating
Causes: Dragging brake with poor oil return, excessive internal gear clearance, motor internal leakage, semi-locked friction plates
Hazard: Reduced operation efficiency, sharply weakened mud escaping and climbing capability.
Oil Leakage at Drive Wheel & Milky Emulsified Gear Oil
Causes: Worn & aged floating oil seals, overfilled oil level, blocked breather hole, housing cracks
Hazard: Water ingress rapidly corrodes gears and bearings, leading to final drive seizure and complete travel failure in a short time.
Sloping Rolling After Parking & Failed Parking Lock
Causes: Excessively worn brake friction plates, fatigued brake springs, pressure loss inside brake chamber
Hazard: Severe safety risks including machine sliding and tipping during slope parking.
Travel Deviation, Vibration & Excessive Clearance
Causes: Excessive main support bearing clearance, excessive play from worn output splines
Hazard: Long-term impact wears internal teeth of drive wheel and aggravates travel vibration and deviation.
VIII. One-Stop Supporting Supply List (Matching Parts for Travel System Assembly)
- Matching original travel piston motor assembly
- Drive wheel, track roller, carrier roller, idler wheel & track assembly (Four Wheels & One Track)
- Special gear oil for final drive & complete repair kit for floating oil seals
- Consumable kit including mounting bolts, sealing gaskets, dust seals and plugs
- Travel counterbalance valve, overload relief valve and travel pipe joint accessories
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