MAINTENANCE AND LUBRICATION 7
en-71
7.6 HYDRAULIC SYSTEM ______________________________________________________
Drain and replace the hydraulic oil if one of the following occur.
• Hydraulic component failure.
• Water or foam in the hydraulic fluid.
• The hydraulic fluid has a rancid odor (indication of high heat).
• When required by maintenance schedule.
Always replace the hydraulic filter when you replace the hydraulic fluid.
Change The Hydraulic Oil
a Clean the area around the breather cap (A) and drain plug
(B) to prevent entry of dirt into the hydraulic system.
b Place a container capable of holding 15 gallons beneath the
hydraulic tank.
c Remove the drain plug (B) and allow the oil to drain into the
container.
d After the oil has drained, assemble the drain plug. Remove the breather cap (A) and fill the tank with
hydraulic fluid through breather cap opening. Assemble the breather cap.
e Start the engine and remove the air from the hydraulic system. Operate all mower functions for 5 minutes
to remove the air and to balance the hydraulic fluid level.
f When all air is removed from the hydraulic-fluid, check the level, add hydraulic fluid to the tank to the
recommended level.
IMPORTANT
If you open the closed hydraulic transmission circuit, you need to fill the circuit with oil before the circuit is used again.
When you fill the hydraulic tank, use only clean oil. The hydraulic oil must go through a 10 micron filter before the oil
enters the tank.
CAUTION
Hydraulic oil can damage your skin. Use gloves when you use hydraulic oil. If hydraulic oil touches your skin,
clean the area immediately.
CAUTION
Discard used hydraulic oil in accordance with local safety regulations.
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