Toro Z Master 7500-D Series Service Manual page 21

Problem
The machine does not drive
The machine vibrates
abnormally
Hydraulic oil leaks from
machine
Foaming hydraulic fluid
Hydraulic traction system
operates hot
Z Master 7500-D Series Service Manual
March 2018 - Digital Edition
TROUBLESHOOTING
Possible Cause
The drive system is in bypass
There is air in the system
The oil is incorrect
The hydraulic oil level is low or too
hot
The engine mounting bolts are loose Tighten the engine mounting bolts
The blades are damaged/incorrect
A damaged deck belt
Transaxle is low on oil
The engine is running poorly
Fitting(s), hose(s) or tube(s) is (are)
loose or damaged
O-Ring(s) or seal(s) is (are)
missing or damaged
Oil level in hydraulic reservoir is low
Hydraulic system has wrong kind of
oil
Hydraulic system has air in it
Pump suction line has an air leak
Traction system pressure is high
due to excessive load
Oil level in hydraulic reservoir is low
Hydraulic oil is contaminated or too
light
Engine speed is too low
Oil filter is plugged
Transaxle bypass valve is loosened
or damaged
Next Step...
Check and set bypass to operational
mode
Follow procedure to ensure it is
properly purged of air
Replace the oil with the approved
type and quantity, purge the system
Add hydraulic oil to the reservoir or
let it cool down
Verify the condition and proper blade
application
Inspect and replace belts as needed
Add oil
Diagnose the run condition and
repair as needed
Tighten Fitting
Replace o-ring
Refer to operator's manual for
correct oil level
Prem. Trans/Hyd Tractor Fluid
Alternate: Mobile 424
Refer to air purge procedure
Check o-ring on suction line fitting,
hose clamp, and input shaft seal on
pump
Back off load
Add oil to system
Change oil, refer to Operator's
Manual for correct viscosity
Verify proper engine RPM settings
on the Horizon Logic Display
Change filter
Fully close bypass valve
Table of Contents
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