W46.20-1122-09
1 | Steering gear | 3 | Test connection | 5 | Hose | ||
2 | Screw plug | 4 | Cap | 6 | Pressure gage |
Danger | Risk of death caused by vehicle slipping or toppling off during lifting | Only lift vehicle at the lift support points specified by the vehicle manufacturer. | |
Warning | Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running. | Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. | |
Warning | Risk of injury to skin or eyes from hydraulic fluid spraying out under pressure.Risk of poisoning from swallowing hydraulic fluid. | Depressurize hydraulic system completely before starting any work on it. Wear protective clothing and safety glasses. | |
Warning | Danger of injury to eyes caused by steering oil emerging at high pressure. Danger of poisoning caused by swallowing steering oil | The setting screws for the hydraulic steering limiters must be turned in by at least three rotations. Wear protective gloves, protective clothing and safety glasses. | |
Warning | Risk of injury from being trapped in the swivel range of steered axles | Ensure that no persons or objects are in the swivel range of all steered axles when turning the steering wheel. Do not stand in the swivel range of the additional steering axle when the engine is running. | |
Warning | Risk of injury to skin or eyes from hot hydraulic fluid spraying out under high pressure. Risk of burn injuries from contact with components heated by hot hydraulic fluid. Risk of poisoning from swallowing hydraulic fluid | Do not make any technical modifications to the pressure gauge or the test equipment. Check the pressure gauge and test equipment for mechanical damage each time prior to use. Observe the flow diagram when connecting the test equipment. Wear protective gloves, protective clothing and safety glasses. | |
Warning | Risk of accident and injury caused by diagnostic equipment in vehicle while traveling | Never use the test equipment to verify the delivery rate and oil pressure of the power steering pump or the pressure gauge while driving. | |
Topical note | Special instructions for lifting and supporting vehicle | ||
Topical note | Notes on maintenance and repair work | ||
Note on calculation of tightening torque when using insertion or socket tools with various effective lengths | |||
| Check | ||
1 | Load vehicle so as to be as close to primary operating conditions as possible. | In isolated cases, and as a result of the steering kinematics, a front axle load that is too low may result in the steering limitation adjustment pressure not being reached or in adjustment not being possible. | |
2 | Move front wheels to straight-ahead position. | ||
3 | Secure vehicle to prevent it moving away. | ||
4 | Position front wheels centrally on turn plates. | ||
5 | Open hood. | ||
6 | Unscrew screw plug (2) with sealing ring. | Collect escaping oil in suitable container. | |
7 | Install test connection (3). | The test connection (3) can be ordered using part number A 942 351 00 69. | |
Test connection to steering gear | |||
8 | Connect hose (5) to manometer (6). | Pressure gage | |
Hose | |||
9 | Unscrew cap (4) from test connection (3). | ||
10 | Connect hose (5) to test connection (3). | ||
11 | Check steering gear oil level and correct if necessary. | Steering gear oil | |
12 | Start engine and run at idle speed. | ||
13 | Turn steering to left or right several times using normal force of the hand until steering gear oil temperature of approx. 50 °C is reached in the steering. | | |
14 | Turn steering wheel left up to mechanical end stop using normal force of the hand, read off pressure at manometer (6), and release steering wheel again. | | |
15 | Note down measured pressure. | ||
16 | Turn steering wheel to right up to mechanical end stop using normal force of the hand, read off pressure at manometer (6), and release steering wheel again. | | |
17 | Note down measured pressure. | ||
18 | Move front wheels to straight-ahead position. | ||
19 | Switch off engine. | ||
20 | Compare noted pressures with specified adjustment pressure of steering limitation valves. | Adjustment pressure for steering limiter | |
If noted pressures do not match specified adjustment pressure of steering limitation valves: | |||
| |||
Adjust hydraulic steering limiter. | |||
Adjustment pressure for steering limiter | |||
Jam nut of adjustment screw for steering limiter | |||
Pressure gage | |||
Hose | |||
21 | Detach hose (5) from test connection (3). | Collect escaping oil in suitable container. | |
22 | Screw cap (4) onto test connection (3). | ||
23 | Detach hose (5) from manometer (6) and seal all connections. | ||
24 | Remove test connection (3). | Collect escaping oil in suitable container. | |
25 | Install screw plug (2) with new sealing ring. | Test connection screw plug to steering gear | |
26 | Check steering gear oil level and correct if necessary. | Steering gear oil | |
27 | Close hood. | ||
28 | Raise vehicle at front axle, remove all turn plates, and lower vehicle back onto floor. | ||
29 | Conduct a road test. | During the test drive, check the overall steering ability of the vehicle. | |
30 | Check steering gear (1) for leak tightness. | Visual inspection. |
Test values for steering gear |
Number | Designation | Steering RB8098 in model 949 (Left-hand drive vehicle) | Steering RB8098 in model 949 (Right-hand drive vehicle) | ||||
BE46.20-N-1002-01ZE | Adjustment pressure for steering limiter | Vehicle unladen | Steering to left | Specified value | bar | 50 (+10) | 20 (+10) |
at engine speed | 1/min | 800 | 800 | ||||
Steering to right | Specified value | bar | 20 (+10) | 50 (+10) | |||
at engine speed | 1/min | 800 | 800 | ||||
Load vehicle | Steering to left | Specified value | bar | 40 (+10) | 40 (+10) | ||
at engine speed | 1/min | 800 | 800 | ||||
Steering to right | Specified value | bar | 40 (+10) | 40 (+10) | |||
at engine speed | 1/min | 800 | 800 |
Test values for steering gear |
Number | Designation | Steering ZF8098 in model 949 (Left-hand drive vehicle) | Steering ZF8098 in model 949 (Right-hand drive vehicle) | ||||
BE46.20-N-1002-01ZE | Adjustment pressure for steering limiter | Vehicle unladen | Steering to left | Specified value | bar | 50 (+10) | 20 (+10) |
at engine speed | 1/min | 800 | 800 | ||||
Steering to right | Specified value | bar | 20 (+10) | 50 (+10) | |||
at engine speed | 1/min | 800 | 800 | ||||
Load vehicle | Steering to left | Specified value | bar | 40 (+10) | 40 (+10) | ||
at engine speed | 1/min | 800 | 800 | ||||
Steering to right | Specified value | bar | 40 (+10) | 40 (+10) | |||
at engine speed | 1/min | 800 | 800 |
400 589 01 91 00
Hose
000 589 06 21 00
Pressure gage