Power Steering; General Information; Maintenance - Toro 520XI Service Manual

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5xi Series Tractor Service Manual

General Information

The 22 HP, 20 HP liquid-cooled and 23 HP
diesel tractors are equipped with power
steering.
This system routes pressurized hydraulic fluid
supplied by the hydrostatic transmission to a
directional valve located at the base of the
steering column. When the steering wheel is
turned, this valve directs pressure to a double
acting hydraulic cylinder, causing the steering
plate to pivot as the cylinder extends or
contracts. Tie rods attached to the steering
plate turn the front spindles.
When the tractor is not running, some oil will
drain from the power steering system. When
this happens, it will be necessary to purge the
air from the system. This is done by turning the
steering wheel with the engine running until the
wheels turn fully and smoothly in both
directions.
The power steering system is equipped with an
in-line filter screen. It should be cleaned after
initial 50 hours, then every 200 hours, or if the
power steering gets noisy.
To clean the power steering screen:
1. Remove the left and center air intake
screens.
2. Remove the screen housing from the clamp
securing it to the left-hand side of steering
tower.
. 3 . Remove the top hose first to prevent oil from
back-flushing the screen.
4. Remove the hydraulic lines, and seal the
ends to keep out dirt.
CHASSIS

POWER STEERING

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Maintenance

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