Group 25, Steering Column and Gear
25-2-2 • Steering System Troubleshooting SM 765, Nov ’06
Constant noise from steering axle
• Loose or worn hub bearing cones. Adjust or
replace hub bearing cones. Replace bearing cones
and bearing cups as a set.
Noise when axle pivots
• Steering axle mountings worn; replace mountings.
• Steering axle mounting cap(s) loose; tighten
mounting cap(s).
Fluctuating pressure
• Faulty operation of relief valve. Fluctuating pres-
sure or loss of pressure in the system is usually
caused by scales, chips, sludge, or filings that have
lodged between the relief valve and seat. A dam-
aged spring or worn valve may also be the cause of
the trouble. Flush and refill the system and replace
the hydraulic return line filter element.
Low pressure at the steering gear
• Refer to Group 26.
Steer cylinder rod binding or sticking
• Binding of linkage. With hydraulic flow shut off
from the cylinder and the rod end uncoupled, the
rod should slide freely in or out by hand. If the pis-
ton is binding, overhaul or replace the cylinder.
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