87Expert(t) 2000
TM
Maintenance Manual
HYDRAULIC SYSTEM MAINTENANCE
In order to keep the hydraulic
system efficient and reliable, the
following care must be taken:
• For new vehicles, change the
return filter element after 50 hours
of use, and twice a year afterwards
(refer to “Filter Element
Replacement Procedure” on
page 94);
• Clean the strainer inside the tank
after the first 50 hours of use, and
once a year afterwards (refer to
“Strainer Cleaning Procedure” on
page 96);
• Hydraulic oil must be replaced at
least once a year or when
contaminated (refer to “Hydraulic
Oil Replacement Procedure” on
page 92);
• When maintenance is carried out,
protect all hoses, fittings and pipes
or any other holes from dirt that
would eventually get into the oil.
Use plugs to block hoses that are
not connected;
• Monthly inspect and adjust (as
needed) the oil pressure of the
hydraulic system (refer to
“Hydraulic Vane Pump Systems”
on page 99);
• On a daily basis, inspect the
hydraulic lines and connections for
leaks, and correct as needed;
• Inspect the pump for leaks or
unusual noise;
• The ball valve on the hydraulic tank
must be completely opened before
engaging the pump or starting the
engine (refer to “Prior to start up”
on page 28);
• When draining the hydraulic oil
from the system — e.g. when
replacing the hydraulic oil — the
hydraulic system must first be filled
with hydraulic oil; the hydraulic
pump must then be removed and
filled individually with hydraulic oil.
This procedure will prevent the
pump from running dry, and
therefore burning out.
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