Power Circuit; Replacing Hydraulic Pumps; Replacing Outer Pump - Alamo Interstater 803213C Operator's Manual

POWER CIRCUIT

The pump unit assembly is made up of the oil reservoir, and hydraulic pump. The pump is driven by the
engine crankshaft through a drive shaft. Therefore, oil is being pumped whenever the engine is running.
When the mower is off, oil is directed to the reservoir by the solenoid motor control valve and does not flow
to the cutter motor. Cooling is provided by patented in frame cooling tubes in the wing mowers.

Replacing Hydraulic Pumps

The pump unit assembly is made up of the oil
reservoir, and hydraulic pump. The pump is driven
by the engine crankshaft through a drive shaft.
Therefore, oil is being pumped
engine is running. When the mower is off, oil is
directed to the reservoir by the solenoid motor
control valve and does not flow to the cutter motor.
Cooling is provided by patented in frame cooling
tubes in the wing mowers. Figure Mnt-FL-0015

Replacing Outer Pump

1. Remove the Pump Cover by unscrewing the
four thumb screws which hold it in place.
2. Disconnect the outer Pump Suction Hose,
Pump Drain Hose, and the Pressure Hose.
NOTE: Clean spills at once. Cap all hoses immediately to prevent contamination of the hydraulic system.
3. Remove the two bolts which attach the outer pump to the inner pump flange.
4. Remove Pump. Lightly oil new "O" Ring and place on inner pump flange. Install the new Pump with the
pump drain ports facing Hydraulic Tank.
5. Reinstall hydraulic hoses. Tighten hose fittings to their proper torque. Refer to Torque Chart.
6. Reinstall Pump Cover and tighten the four thumb screws securely.
7. Replacing Inner Pump:
8. To replace inner pump both pumps must be removed. Follow same procedure as for outer pump. BE
SURE TO CAP ALL HOSES AND CLEAN OIL SPILLS AT ONCE.
NOTE: Clean spills at once. Cap all hoses immediately to prevent contamination of the hydraulic system.
9. Separate the inner pump from the outer pump and install new pump to inner pump following step 4 making
sure both case drain ports are facing hydraulic reservoir.
10. Reinstall pumps to pump mounting bracket.
11. Reinstall all hoses. Tighten hose fittings to their proper torque refer to torque chart.
12. Reinstall all guards.
INTERSTATER 03/09
© 2009 Alamo Group Inc.
MAINTENANCE
whenever the
Maintenance Section 5-14