5-12 Problem Cause Remedy Constant steering to maintain straight travel Air in system. Leakage in steering system. Worn steering unit. Leaf spring without spring force or broken. Spring in overload relief valve broken. Gear wheel set worn. Cylinder seized or piston seals worn. Check for foamy oil. Do steering system leakage check. Do steering unit neutral leakage test in group 3. Replace leaf springs. Replace overload relief valve. Replace gear wheel set. Replace defects parts. Slow steering wheel movement will not cause any frame movement Leakage in steering system. Worn steering unit gerotor. Do steering system leakage check. Do steering unit leakage check.
Steering wheel can be tur ned with frames against steering stop Leakage in steering system. Do steering system leakage check. Steering wheel turns with no resistance and causes no frame movement Broken steering column or splined of steering unit. Lack of oil in steering unit. Leakage in steering system. Remove and inspect. Start engine and check steering operation. Do steering system leakage test in group 3. Erratic steering Air in oil. Low oil level. Sticking priority valve spool in MCV. Loose cylinder piston. Damaged steering unit. Check for foamy oil. Add recommended oil. Remove and inspect spool. Remove rod to inspect piston. Remove and inspect. Spongy or soft steering Air in oil.
Low oil level. Check for foamy oil. Add recommended oil. Free play at steering wheel Loose steering wheel nut. Worn or damaged splines on steering column or valve. Tighten. Inspect. Steering unit binding or steering wheel does not immediately return to neutral when released Binding in steer ing column or misalignment of column. High return pressure. Contamination in steering unit. Inspect. Check for a pinched or damaged return line. Inspect hydraulic fi lter for contamination. Repair cause of contamination. Flush hydraulic system.