侍# Hydraulic oil must be at operating temperature for these checks (refer to page 6-55). 5-14 Item Description Service action Steering unit check Run engine at low idle. Turn steering wheel until frames are A at maximum right (A) and then left (B) positions. B LOOK : Frames must move smoothly in both directions. When steering wheel is stopped, frames must stop. FEEL : Excessive effort must not be required to turn steering wheel. NOTE : It is normal for steering to drift from stops when steering wheel is released. OK Check completed. NOT OK Go to next check. Steering system leakage check Heat hydraulic oil to operating temperature. Run engine at high idle.
Turn steering wheel rapidly until frames are against stop. Left Right Hold approximately 2 kg on steer- ing wheel. Count steering wheel revolutions for 1 minute. Repeat test in opposite direction. LOOK : Steering wheel should rotate less than 7 rpm. NOTE : Use good judgment; Excessive steering wheel rpm does not mean steering will be affected. OK Check completed. NOT OK Do steering system leakage test in group 3 to isolate the leakage. Priority valve (in steering valve) low pressure check Park machine on a hard surface. Hold brake pedal down. Run engine at high idle. Steer machine to the right and left as far as possible. LOOK :
Machine must turn at least half way to the right and left stops. OK Check completed. NOT OK Do steering valve (EHPS) pressure test in group 3. Priority valve (in steering valve) high pressure check Run engine at high idle. Steer to steering stop and release steering wheel. Roll bucket back and hold over relief and observe engine rpm. Turn steering wheel to steering stop and hold, observe engine rpm. LOOK : Steering stall engine rpm must be higher than hydraulic stall rpm. OK Check completed. NOT OK Priority pressure is set too high. Do steering valve (EHPS) pressure test in group 3.