Operational Troubleshooting Cont; Loss Of Hydraulic Function Cont; Erratic Operation; Slow Operation - Toro Dingo TX 413 Service Manual

HYDRAULIC TROUBLESHOOTING

Operational Troubleshooting cont.

Loss of Hydraulic Function cont.

Pressure Line Leaks
• Tighten loose fittings/Replace damaged fittings
• Replace damaged seal(s)
Relief Valve
• Pressure test to ensure the valve is opening at the
rated pressure
• Look for leaks, replace damaged seals
• Clean the valve and inspect for broken spring

Erratic Operation

Air in the System
• Inspect suction side for leaks
• Ensure Reservoir is at the full mark
Cold Fluid
• Fluid viscosity too thick
• Allow fluid to reach operating temperature prior to
operating hydraulic functions
Components Sticking/Binding
• Inspect for dirt and other contaminants
• Check for worn or bent parts
Quick Coupler Worn
• Replace
Damaged Pump
• Check and replace broken or worn bearings
• Repair or replace pump
• Belt or pulley (hydrostatic pump)
Contaminants in the Relief Valve
• Clean and test
Filter/Suction Line Restriction
• Collapsed suction hoses or filter lines restricting
flow
11-4

Slow Operation

Cold Fluid
• Fluid viscosity too high
• Allow fluid to reach operating temperature prior to
operating hydraulic functions
Low Engine Speed
• Adjust to engine manufacturer specification
Low Fluid Level
• Fill reservoir to the full mark
• Check system for external leaks
Air in the System
• Inspect suction side for leaks
• Ensure Reservoir is at the full mark
Worn/Damaged Pump
• Replace pump
• Check fluid
• Check for proper alignment
• Belt or pulley (hydrostatic pump)
Filter/Suction Line Restriction
• Collapsed suction hoses or filter lines restricting
flow
Relief Valve
• Pressure test to ensure the valve is opening at the
rated pressure
• Look for leaks, replace damaged seals
• Clean the valve and inspect for broken spring
Worn/Damaged Components
• Check Valves, wheel motors and cylinders for
damage/leaks
• Repair/Replace as necessary
Pressure Line Leaks
• Tighten loose fittings/Replace damaged fittings
• Replace damaged seal(s)
Rev. 001 TX 413 Service Manual