Wright Pre Serial #43181 - Manual (Page 15)

15
Bleeding Air from the Hydraulic System
Whenever servicing the hydraulic system, it is of
the utmost importance to keep any dirt or debris
from getting into the system. When any of the
hydraulic parts are disconnected or removed or
when the oil is changed, air must be bled from the
system. If air is entrained in the system, loss of
power, excessive heat, and damage to the hydraulic
pumps may occur. First, make sure the oil level in
the reservoir is correct. The level should be
between 2” – 2 1/2” below the top of the oil fill tube.
Use fully synthetic oil: Mobil 1 15W-50. Lift the
mower so that the rear wheels are off the ground.
Be careful to support the mower so that it will not fall
or tip while the system is bled of air. With the
bypass valves open and the engine running, slowly
move the control levers back and forth five or six
times. Now close the bypass valves and with the
engine running, slowly move the control levers back
and forth five or six times. It may be necessary to
repeat the above steps until all the air is purged and
the rear wheels are turning at normal speed. After
purging is complete, adjust the oil level in the
reservoir if necessary.
Battery Service
The battery is 12 volts and is a maintenance free
battery. Charge the battery only if it will not start the
mower properly. Remove the battery from the
mower before charging. Follow the instructions of
the battery charger for proper and safe charging of
the battery.
Cleaning the Mower
The underside of the mower deck should be
checked and cleaned twice daily, and more often if
the grass being mowed is lush or wet. The entire
mower should be cleaned daily at the end of the
work day.
Cleaning should be done with a leaf blower or low-
pressure compressed air. Wash with water only
when necessary and do not use a pressure washer
or nozzle as the water can enter electrical
connections causing an electrical short, rust and
corrosion. When washing with water, do so when
the unit has cooled down. Washing a hot machine
can cause various unseen system damage. If water
is used for cleaning, immediately dry it with a leaf
blower or low-pressure compressed air. Once the
wash is complete, always lubricate and grease all
applicable areas.