TM 5-3810-307-24-1-2
8.1.5.3
Testing and Adjusting Hydraulic Steering Limit
Refer to Section 3.
8.1.5.4
Testing Steering for Pressure
Hold pressure elements, approximately 15 mm thick, (Fig. 6) between wheel stop components
which are designed in such a manner that the steering lock is limited 1/2 to 3/4 steering wheel turn
before attaining final lock. The limitation of the steering lock should be attained reliably at these
pressure elements, but not in hydro steering by steering nut in the housing. Turn steering wheel at
idle speed of engine clockwise up to stop and keep turning clockwise on steering wheel at a force of
100 - 200 N until the restoring force of the steering valve is overcome. The resulting oil pressure is
read on pressure gauge. The same measurement is performed when steering to the left. If steering
to the right or to the left or towards both sides, it is shown that the oil pressure at a steering force of
100 -200 N is below the previously measured maximum oil pressure of the pump, the function of the
hydraulic steering is not in order. The cause of the pressure drop may be too much leak oil in
steering valve of steering or in power cylinders.
Figure 6. Pressure Elements
8.1.5.5
Testing Oil Pump with Hydro Steering Tester for Volume Flow
With the engine idling, close the shutoff valve (8) until the test pressure specified for the type of
pump in question is applied. Check volume-flow reading (see description of hydraulic steering tester
or the appropriate repair instructions for the volume-flow, test-pressure and test-speed
specifications).
Testing Steering and Power Cylinder with Hydro Steering Tester for Leak Oil (At
Idle Speed of Engine)
Steering System With Power Cylinder
Open the throttle valve (9). Close the shutoff valve (8) completely and the throttle valve until a back
pressure builds up to 20 bar beneath the maximum pressure as stated on the rating plate. Open the
shutoff valve. Place a thrust element approximately 15 mm in thickness on the full-lock bolts.
Change-1 H-27
