Traction Circuit Problems; Mow Circuit Problems - Toro Reelmaster 3100-D Service Manual

Traction Circuit Problems

Mow Circuit Problems

Troubleshooting:
Problem
Traction response is sluggish.
Neutral is difficult to find, or unit operates in
one direction only.
No traction exists in either direction.
Wheel motor will not turn.
Wheel motor will not hold load in neutral.
Problem
Reel motor drive pump is noisy (cavitation).
Reels will not turn.
Reel speed is erratic.
Reel(s) turn too slowly.
Possible Causes
Bypass valve in the traction pump/hydrostat is
open or defective.
Charge pressure is low. Hydraulic oil is very
cold.
Towing by−pass valve is open or worn. Brake
is not released.
Traction pump or wheel motor(s) are worn or
damaged.
External control linkage is mis-adjusted,
disconnected, binding, or damaged.
Traction pump is worn or damaged.
Brake is not released.
Oil level in reservoir is low.
Towing by−pass valve is open.
Charge pressure is low.
Traction pump or wheel motor(s) are worn or
damaged.
Traction pump drive belt loose or broken.
Internal parts in wheel motor are damaged.
Brakes are binding.
Key on wheel motor shaft is sheared or
missing.
Make up fluid from charge pump is not
available.
Hydrostat ball check valves are damaged.
Possible Causes
Reservoir oil level is low.
Suction line is restricted.
Suction line has an air leak.
Solenoid valve SV is stuck open.
An electrical problem exists (see
Electrical System (page
Gear pump P1 is damaged.
Reel to bedknife adjustment is too tight.
Reel bearing(s) are damaged.
Reel section of pump is inefficient (see
Circuit Testing − Pressure Test (page
Reel motor has internal leakage or
malfunctioning cross−over relief valve (see
Reel Motor Cross−over Relief Pressures Test
(Using Pressure Gauge) (page
Reel bearing(s) are damaged.
Page 3–4
Chapter 6:
6–1)).
Reel
5–40)).
5–46)).
Reelmaster ® 3100-D/3105-D
20252SL Rev A