(1) Flow divider spool. (2) Pilot relief valve. (3) Priority flow divider and pilot relief valve body. (4) Pump housing. (5) Driving pump gear. (6) Mounting
flange. (7) Helical gear. (8) Driven pump gear.
The steering pump supplies priority oil flow to the steering
circuit. It also supplies charge oil for propel and vibratory
circuits. It also supplies oil for the blade leveling option if
equipped. The priority flow divider valve divides the oil flow
between the steering circuit and the charge/leveling blade
circuit. The steering circuit has priority, and the return flow
from the steering circuit goes to the charge circuit.
The steering pump is a fixed displacement gear pump driven
off of the front engine housing. The output from the pump will
vary with the RPM of engine. Priority flow divider and pilot
relief valve body (3) is mounted to pump housing (4). Priority
valve spool (1) divides the flow of oil from the pump into a
constant priority flow and a variable secondary flow. Pilot relief
valve (2) limits the steering pressure relief.