Snorkel TBA50 Pump Failure and Machine Overview

[MikePhua]

Machine Introduction
The Snorkel TBA50 is a versatile rough-terrain telehandler widely used in construction, industrial, and agricultural applications. It features a spacious operator platform, 4-wheel drive, articulated boom, and strong hydraulic capacity suited for lifting heavy materials up to around 5,000 lbs with a reach up to 50 feet.
Pump Failure Issue

• Operators have reported hydraulic pump failures in the Snorkel TBA50, resulting in loss of lifting and boom functions.
  
• Symptoms include decreased hydraulic pressure, sluggish boom movements, inability to lift or extend, and sometimes complete hydraulic system shutdown.
  
• The pump failure can stem from fluid contamination, worn seals, internal component fatigue, or overheating.
  

Hydraulic System Overview

• The TBA50 hydraulic system operates at a maximum pressure of approximately 2,500 psi (17,237 kPa).
  
• The hydraulic fluid reservoir capacity is about 62.4 liters (16.5 gallons), with the system holding around 94.6 liters (25 gallons) total.
  
• Recommended hydraulic fluids include Mobil DTE-13M (ISO VG32) for temperatures above -13°C and Mobil DTE-11M (ISO VG15) for colder conditions.
  

Causes and Diagnosis

• Contaminated hydraulic fluid accelerates wear on pump components and valves, necessitating regular fluid and filter changes.
  
• Overheating due to continuous high-load operation or inadequate cooling reduces pump reliability.
  
• Seal wear from age or fluid degradation leads to internal leaks and loss of pressure.
  
• Misalignment or damage in hydraulic lines can cause cavitation or pressure loss impacting pump performance.
  

Repair Recommendations

• Replace or rebuild the hydraulic pump with OEM or certified aftermarket parts.
  
• Flush and replace hydraulic fluid and filters regularly as per manufacturer’s interval.
  
• Inspect and replace worn seals, hoses, and connectors to prevent fluid loss.
  
• Monitor system temperature closely and inspect cooling components.
  
• Implement operator training to avoid prolonged heavy hydraulic loads beyond recommended cycles.
  

Terminology

• Telehandler: Versatile lifting machine combining boom reach and forklift functions.
  
• Hydraulic Pump: Component pressurizing fluid to power machine actuators.
  
• Pressure (psi/kPa): Force per unit area applied by hydraulic fluid.
  
• Fluid Contamination: Entry of foreign particles or moisture into hydraulic system causing wear.
  
• Seal: Elastomeric components preventing leakage within the hydraulic system.
  
• Cavitation: Formation of vapor bubbles causing damage within hydraulic pumps.
  

Summary
The Snorkel TBA50 telehandler’s hydraulic pump failure is a critical issue impacting lifting operations. Maintaining clean hydraulic fluid, regular service, component inspections, and attention to operating conditions prolongs pump life and machine uptime. Understanding the hydraulic system and proactive maintenance paired with timely repairs are essential to keeping the powerful TBA50 telehandler operational and dependable on job sites.