Table 3-1. Operator/Crew Troubleshooting Table - CONT
TEST OR INSPECTION
HYDRAULIC SYSTEM - CONT
STEERING WILL NOT ADJUST
Check that brakes are released and steerable axles are not blocked or obstructed.
a. Release semitrailer brakes by operating brake release valve (para. 2-8).
b. Move wheel chocks away from tires or remove any debris or materials that may block the
steerable axles from turning.
If coupled, check that steering wedge is properly seated with tractor fifth wheel.
If uncoupled, check that steering wedge is not offset to extreme limits of travel.
If steering wedge is locked at extreme limits, refer to paragraph 2-24 and adjust steering wedge.
Check for normal steering pressure at systems gage for adjusting steering. Normal pressures should
read 1000 - 2500 psi (6895 - 17238 kPa) when steering wedge is approximately straight ahead and
pressure should rise up to 3000 - 3900 psi (20685 - 26891 kPa) when positioned for an extreme turn.
If system pressure gage reads higher than normal, check for mechanical binding, damage, hydraulic
leaks, or misalinements of platform and gooseneck steering components. If defects are found, notify
STEERING PRESSURE INDICATOR LIGHT COMES ON
Check that indicator light comes on and semitrailer also has other malfunction symptoms, such as
poor tracking behind tractor or steering will not adjust.
a. Start APU and recharge steering that would hydraulic circuit (para. 2-16).
control valve (para. 2-6) in both directions for approximately 10 seconds.
b. Check for general hydraulic failures limit fluid flow to hydraulic controls. Refer to symptom 10.