107Expert(t) 2000
TM
Maintenance Manual
PRIMING A NEW PUMP
To prevent cavitation or air in the
hydraulic system after installing a new
pump or even when flushing the
hydraulic system, make sure to prime
the pump before starting the engine.
Apply the following procedure for
any new installed pump:
1. Make sure the parking brake is
applied and the vehicle is tagged
out for maintenance purposes
(refer to “Lockout/Tagout
Procedure” on page 8);
2. With the ball valve closed
(Figure 169. “Hydraulic pump on
front bumper”), fill the suction
line before installing it on the
pump;
3. Fill the pump housing with new
oil;
4. Reinstall the pressure hose on
the pump housing;
5. Open the ball valve on the
suction line;
6. Crank the engine repeatedly —
about five times — without letting
it start in order to fill the suction
hose and the pump with
hydraulic oil and to push the air
back into the tank;
7. Start the engine and make sure
the pump does not make
excessive noise;
8. Before putting back the vehicle
in service, recalibrate the system
pressures according to section
1.15.1 and section 1.15.2.
Note:For units equipped with vane
pump.
Figure 169. Hydraulic pump on front
bumper
DANGER
APPLY THE LOCKOUT / TAGOUT
PROCEDURE
AT ALL TIMES WHEN
MAINTENANCE
OR INSPECTION IS
CARRIED
OUT ON THE VEHICLE.