MAINTENANCE
3-44 WB140-2N, WB150-2N
★ Hydraulic oil in the machines equipped with demolition hammers
deteriorates more rapidly than the oil of machines used for simple
digging operations. On new machines, replace filter after the first
100-150 hours of operation and for successive replacements, follow
the schedule on replacement interval table.
★ If the machine contains synthetic biodegradable oil type HEES, the
filter must be replaced after the first 50 hours of operation.
CHANGING FUEL FILTER
The fuel filter and fuel pump can be reached after opening the engine
hood.
FUEL FILTER
1. Clean external surfaces of the unit and then unscrew and remove
old filter (1) with the special wrench provided.
2. Clean inside of head (2).
3. Lubricate the gasket of new filter and tighten thoroughly.
4. Give it another half turn by hand.
5. Bleed the fuel supply circuit.
BLEEDING THE CIRCUIT
After filling the tank, proceed as follows:
1. Turn ignition switch to “ON” position.
2. Loosen drain screw (3) of filter head (2), using a 12 mm wrench.
• Replace the filter element after work, when engine has
cooled down to 40-45
°
C (104-113
°
F).
• When these operations are carried out, fuel may be
spilled; clean the dirty areas immediately, in order to pre-
vent any risk of slipping or fire.
• Oils, filters, coolant, and the battery are considered spe-
cial waste and must be collected and disposed of
according to all anti-pollution regulations in force.
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