Case 1021F, Руководство оператора

Страница: 194 / 366

7 - MAINTENANCE
Hour meter
The hour meter enables service operations to be sched-
uled. Its hourly indications are the same as those of a
clock when the engine is running.
Servicing intervals are carefully calculated to guarantee
safe and efficient machine operation.
Be sure to carry out all the servicing operations properly
as defined in this manual.
Variable periodic maintenance
Some working environments require that maintenance be performed more frequently. Dust, dirt, moisture, extreme hot
or cold and many other factors should be taken into consideration when servicing the machine. Certain equipment or
auxiliary tools may cause more stress on hydraulics, drivetrain, engines or filters. The following maintenance should
be performed on regular schedules, but often need special attention when conditions require.
Engine air filter
Replace the primary element if the air filter indicator lamp
illuminates.
The primary element may be cleaned, however a new el-
ement is recommended, if questionable. The inner ele-
ment cannot be cleaned and must be replaced.
To periodically clean the primary air filter, hold with the
rubber seal facing down. Tap all sides of the filter with
your hand. Blow the filter out with compressed air —
maximum pressure
4.8 bar ( 70 psi ). Hold the nozzle a
minimum of 7.6 cm ( 3 in ) away from filter. Use a nozzle
diameter no smaller than 6.4 mm ( 0.25 in ). Inspect the fil-
ter for damage. Wipe the filter seal off and clean all dust
from air cleaner housing. Never use water to clean the
primary filter.
Tires and wheels
Adjust the inflation pressure of the tires when circum-
stances require. Keep tires properly inflated and check
torque of wheel bolts/studs.
Wheels should be checked for proper torque every twenty
hours when new and until they remain tight.
Air conditioning condenser
The air conditioning condenser is located in the cooling
box at the rear of the machine. Use compressed air to
remove debris and build up on the condenser.
Fuel cooler
The fuel cooler is located in the cooling box at the rear of
the machine. Use compressed air to remove debris and
build up that may impede proper function of the cooler.
Fuel prefilter
Raise the engine hood and drain water and sediment from
the fuel prefilter. Slowly loosen the drain valve located
under the filter until clean fuel runs out.
Retighten the valve and replace connectors. Do not over-
tighten valve. This procedure should be a periodic main-
tenance procedure dependent upon climate and use con-
ditions. See the complete procedure for the fuel prefilter
and fuel filter in this section.
Priming the fuel system
Prolonged period of inactivity or running out of fuel may
allow air to get into the fuel system. If this should happen
make sure the tank is full and then prime the system using
the manual priming pump on the fuel pre-filter.
Fuses
Fuses may be reached by opening the access door lo-
cated on the right side of the cab. If a fuse has blown the
indicator light will illuminate.
NOTE: If a fuse blows, replace it at once. Locate the
problem and if it reoccurs, have it checked by a service
technician.
7-2