Toro Reelmaster 5510 Series, Service Manual

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Troubleshooting
The following chart contains suggestions that can be used to solve performance
issues specific to the hydraulic system. The suggestions are not all-inclusive.
There can be more than 1 cause for a machine malfunction.
Review the hydraulic schematic found in Appendix A (page A–1) and
information on the hydraulic system operation in the Hydraulic Flow Diagrams
(5410/5410-D/5510/5510-D/5610) (page 6–20) or Hydraulic Flow Diagrams
(5610-D) (page 6–32) . This information will be useful during the hydraulic
troubleshooting process.
Refer to Testing the Hydraulic System (page 6–56) for precautions and specific
hydraulic test procedures.
General Hydraulic System Problems
Problem Possible Causes
The hydraulic fluid is leaking from the system. • The fitting(s), hose(s), or tube(s) are loose or damaged.
• The O-ring(s) or seal(s) are missing or damaged.
The hydraulic fluid foams excessively causing fluid leakage
from the hydraulic tank breather.
Note: Some aeration of the hydraulic fluid on this machine
is normal. This aeration (foaming) may be more noticeable
after initial filling of hydraulic tank.
• The hydraulic-fluid level in the hydraulic tank is low.
• The hydraulic system has a wrong type of fluid.
• One of the pump suction lines has an air leak.
• Incompatible hydraulic fluids are mixed in the system.
• There is water in the hydraulic system.
The hydraulic system operates hot. • The traction system pressure is high due to load or dragging
brakes.
• The hydraulic-fluid level in the hydraulic tank is low or the
inlet filter is loose or clogged.
• The hydraulic fluid is contaminated or the fluid viscosity
is too light.
• The oil cooler is damaged or plugged.
• The oil cooler air flow is obstructed.
• The hydraulic-fluid filter is plugged.
• The piston (traction) pump bypass valve is open or
damaged.
• The gear pump relief valve is stuck open.
• The check valve in the piston (traction) pump is not seating
or is damaged.
• The charge pressure is low.
• The piston (traction) pump or wheel motor(s) is worn or
damaged.
• Engine RPM is too low.
• The engine fan is not operating properly.
Note: If 1 traction circuit component has internal wear or
damage, it is possible that the other traction components
are also damaged.
Hydraulic System: Troubleshooting Page 6–50 Reelmaster ® 5410/5510/5610 Series
15216SL Rev C