Toro Groundsmaster 4500-D Series Service Manual page 46

Troubleshooting:
Problem
All cutting decks operate slowly.
Cutting deck stops under load.
Possible Cause
Engine RPM is low.
All deck motors are worn or damaged.
First and second gear pump sections are worn
or damaged.
Relief valve in deck control manifold is
bypassing.
Traction speed and cutting conditions (e.g.
very tall or wet grass) exceed deck capacity.
Deck motor relief valve is stuck or damaged.
Deck motor has internal leakage (bypassing
oil).
Cutting deck gear pump section (first or second
section) is worn or damaged.
Page 3–6 Groundsmaster ® 4500-D/4700-D
19245SL Rev A