5-16 Problem Cause Remedy Slow or hard steering Too much friction in the mechanical parts of the machine. Cold oil. Low priority valve pressure setting. Worn hydraulic pump. Sticking priority valve spool. Broken priority valve spring. Lubricate bearings and joints of steering column or repair if necessary. Check steering column installation. Warm the hydraulic oil. Do priority valve pressure test. Clean or replace cartridge in steering valve. Do hydraulic pump performance check. Remove and inspect. Remove and inspect. 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 double shock valve broken. Gear wheel set worn. Cylinder seized or piston seals worn. Check for foamy oil. Do steering system leakage check. Do steering system leakage check. Do steering unit neutral leakage test in group 3. Replace leaf springs. Replace shock valve. Replace gear wheel set. Replace defects parts. Slow steering wheel movement will not cause any frame movement Leakage in steering unit gerotor. Worn steering unit gerotor. Do steering system leakage check. Do steering leakage check. Steering wheel can be t u r n e d w i t h f r a m e s 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 cou- pling. 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.