TM 5-3810-307-24-1-2
The thickness of the sheet depends on the stiffness of the steering system and it is therefore
possible that on some vehicles the sheet must be thicker. After lock has been attained, a short
period (max 5 s) of turning the steering wheel will overcome the resetting force of the steering
valves until a fix stop has been attained. This requires a circumferential force on steering wheel of
approx. 100 - 200 N. In this position, the pressure gauge should indicate an oil pressure of 30 to 35
bar. The adjustment is corrected by loosening the counternuts (b1 or a1) and screwing the
respective adjusting screw (b2 or a2) in or out; 20 turning travel on adjusting screw corresponds
with a pitman arm deflection of 1. While turning the adjusting screw, release steering wheel so that
only a passing pressure will be established during this job. Then tighten counternut (b1 or a1) to 30
Nm. The adjustment for the second wheel lock is performed in the same manner. Adjusting screw
(b2) and counternut (b1) in Fig. 2 must be adjusted, when the pitman arm is moved in direction "A"
as shown in Fig. 3. The adjusting screw (a2) and the counternut (a1) are adjusted likewise, when
the pitman arm is turning in direction "B".
After adjustment has been made as described, the hydraulic support should be available until
shortly before reaching wheel lock.
If the pressure drops too early or too late when turning the pitman arm in direction "A" or "B", the
adjusting screws (b2) and (a2) must be turned as described below.
If the pressure measured is higher than 35 bar, the respective steering limit valve must be
screwed further into the cover (clockwise).
If the pressure measured is lower than 30 bar, the respective steering limit valve must be turned
further out (counterclockwise).
In Fig. 4, the distance "f" is the clearance between the wheel-stop components which should be 1 -
3 mm when the hydraulically remote-controlled or mechanical steering-lock limitation responds.
3.1.3
Checkup:
Drive normally loaded vehicle slowly and turn steering wheel until power-assist switches off.
Between the wheel lock (wheel stop) components there should now be a gap of 1 - 3 mm which
corresponds with a steering wheel turn of approx. 20 degrees up to 30 degrees.
Legend for Figures 2 and 3
1.
Pressure Connection
11.
Suction Line
2.
Return Connection
12.
Return Line
3.
Power Cylinder Connection
13.
Pressure Gauge
4.
Power Cylinder Connection
a2.
Adjusting Screw of Hydraulic Steering
5.
Oil Pump
Limit for Pitman Arm Deflection in Direction
6.
Not used
B
7.
Oil Tank
b2.
Adjusting Screw of Hydraulic Steering
8.
Not used
Limit for Pitman Arm Deflection in Direction
9.
Control Line Remote Control
A
Valve with Supporting Valve
A/B
Control Lines Power Cylinders
10.
Pressure Line
H-12 Change-1
