Pto Circuit Problems - Toro Groundsmaster 7210 Service Manual

Traction Circuit Problems (continued)
No traction exists in either direction.
The wheel motor does not turn.
The wheel motor does not hold load in the N
Note: The machine may not be completely stationary if
parked on an incline without the parking brake engaged.
A single-wheel motor turns while unloaded, but
slows down or stops when the load is applied.
The machine does not track straight.
Note: If the machine does not track straight, look for a
problem with the components that affect the weaker traction
side of the machine.

PTO Circuit Problems

Problem
The cutting deck blades do not turn.
The cutting deck blade(s) turn too slowly.
The PTO does not stop when disengaged.
Groundsmaster 7210
16222SL Rev C
• The hydraulic-fluid level in the hydraulic tank is low.
• The transmission bypass valves are open.
• The charge pressure is low.
• The engine flywheel coupling is damaged.
• The transmission or wheel motor(s) is worn or damaged.
Note: If 1 traction circuit component has internal wear or
damage, it is possible that the other traction components
are also damaged.
• The transmission bypass valve(s) is open.
• The transmission or wheel motor is worn or damaged.
Note: If 1 traction circuit component has internal wear or
damage, it is possible that the other traction components
are also damaged.
position. • The make-up fluid from the charge pump is not available.
EUTRAL
• The check valves in the transmission are damaged.
• The valve plate(s) in the transmission is worn or damaged.
• The wheel motor is worn or damaged.
• The cylinder block assembly in the transmission
is worn or damaged.
• The wheel motor is worn or damaged.
• The transmission components (e.g., piston
pump, relief valve, and check valve) for the
problem wheel motor are worn or damaged.
Note: If 1 traction circuit component has internal wear or
damage, it is possible that the other traction components
are also damaged.
• The external traction control linkage is incorrectly
adjusted, disconnected, binding, or damaged.
• The transmission bypass valve(s) is open.
• The brake is dragging or binding.
• The transmission-check valve is not seating or damaged.
• The transmission or wheel motor(s) is worn or damaged.
• An electrical problem exists; refer to
Electrical System (page
• The engine coolant temperature is high.
• The transmission solenoid valve is stuck.
• The transmission charge pump is damaged
(the traction charge circuit is also affected).
• The transmission pressure valve is damaged.
• There is a problem with the cutting deck;
refer to Chapter 7: Cutting Deck (page
• The engine speed is too low.
• There is a problem with the cutting deck;
refer to Chapter 7: Cutting Deck (page
• An electrical problem exists; refer to
Electrical System (page
• The transmission solenoid valve is stuck or damaged.
• The PTO brake friction plates are worn or damaged.
Page 4–29
Possible Causes
Chapter 5:
5–1).
7–1).
7–1).
Chapter 5:
5–1).
Hydraulic System: Troubleshooting