Navistar ProStar+, Operation And Maintenance Manual

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Maintenance Instructions
Power Steering
Whenever the power steering system has been drained and
refilled for any reason, air must be bled from the system before
returning the vehicle to service. Failure to properly bleed the
hydraulic system can result in degradation of power system
performance.
Consult your International Truck dealer who is aware of the
proper procedures for filling and bleeding the system.
The power steering fluid filter is located inside the power steering
reservoir. To remove the filter, unscrew the large cap on the
power steering reservoir and unscrew the filter. Reverse the
procedure to install the new filter.
With time, the large square-cut reservoir cap O-ring seal may
shrink slightly. To assist in reinstallation of the cap, the O-ring
may need to be stretched. To stretch the O-ring, pull on it while
pinching it between your thumb and finger. It must be large
enough to stay completely in the shallow groove in the top edge
of the reservoir prior to cap installation. Replace cracked or
damaged O-rings.
Refer to SECTION 8 — MAINTENANCE INTERVALS AND
SPECIFICATIONS for the fluid and filter replacement intervals.
Tires
Tire Warnings
WARNING
To prevent property damage, personal injury, and
/ or death, for field maintenance, only inflate and
load tires to the maximum of the least-rated tire
on the axle. Due to tire manufacturers re-marking
tires to conform to the SI (metric) system, tires
marked with old and new loads or inflation
pressures could be placed on the same vehicle.
WARNING
To prevent property damage, personal injury,
and / or death, always maintain your tires in
good condition. Frequently check and maintain
correct inflation pressures as specified by tire
manufacturers. Inspect periodically for abnormal
wear patterns and repair / replace cut or broken
tire casing.
Always use experienced, trained
personnel with proper equipment and correct
procedures to mount or remove tires and wheels.
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