Toro TM5490, Operator'S Manual

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When using the following chart it may be found that overhaul of major components or hydraulic
pressure adjustments are necessary. In this case it is recommended that your authorised dealer make
these repairs as they are properly equipped to do this work.
WARNING: PREVENT ACCIDENTS - ALWAYS Apply the parking brake, switch off the engine
and remove the ignition key before attempting to work on the mower.
TROUBLE SHOOTING
FAULT POSSIBLE CAUSE REMEDY
Hydraulic oil system
overheating
Cylinders are tight against bottom blades Adjust cylinder to bottom blade clearance
Low relief valve setting Have relief valve cleaned and pressure
checked. Consult your authorised dealer
Low oil level Fill reservoir to correct level
Brakes engaged Disengage brakes
Cutting cylinders tight on bottom blades Re adjust settings
Excessive work rate Reduce work rate i.e., increase height of cut
or reduce forward speed
Hydraulic oil viscosity incorrect Drain and refill hydraulic oil reservoir with
correct grade viscosity oil, refer to
RECOMMENDED LUBRICANTS .
Excessive noise in
hydraulic system
Faulty pump Identify noisy pump and service or replace
Faulty motor Identify noisy motor and service or replace
Air leaking into system Tighten or replace hydraulic fittings
particularly in suction lines
Suction strainer blocked or damaged Clean and replace suction strainer or renew
as necessary
Excessive oil viscosity due to cold
conditions
Allow system to warm up
Low relief valve setting Have relief valve cleaned and pressure
checked. Consult your authorised dealer
Low hydraulic oil level Fill hydraulic oil reservoir to correct level
Cylinders rotate in the
wrong direction
Back lap control lever not locked in the
‘normal operation’ position
Lock the back lap control lever in the ‘nor-
mal operation’ position
After initial satisfactory
operation machine loses
power.
Worn pump or motor Replace as necessary
Low hydraulic oil level Fill hydraulic oil tank to correct level
Incorrect oil viscosity Renew oil in hydraulic tank with hydraulic
oil of correct viscosity grade, refer to
SPECIFICATIONS
Oil filter element blocked Change filter element
Faulty pressure relief valve Have relief valve cleaned and pressure
checked. Consult your authorised dealer
Overheating Incorrect hydraulic oil grade, refer - Problem
‘HYDRAULIC OIL SYSTEM
OVERHEATING’
Leaks on suction hose Check and tighten fittings. Replace hose if
necessary