Vehicles with elbow fitting |
1 | Steering gear |
2 | Elbow fitting (without test connection) |
3 | Elbow fitting (with test connection) |
3.1 | Screw plug |
W46.20-1172-12
Vehicles with elbow fitting |
3 | Elbow fitting (with test connection) |
3.1 | Screw plug |
4 | Test connection |
5 | Hose |
6 | Pressure gage |
W46.20-1135-03
W46.25-1135-09
Vehicles without elbow fitting |
4 | Test connection | 7 | Oil pressure line | 13 | Adapter | ||
5 | Hose | 8 | Oil pressure hose | 13.1 | Screw plug | ||
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. | |
Warning | Risk of injury caused by body parts being pinched or crushed as cab is tilted | Ensure that no one is within the tilting range of the cab as it is being tilted. Always tilt the cab all the way to the end position and secure it with the safety strut. | |
Topical note | Special instructions for lifting and supporting vehicle | ||
Topical note | Notes on maintenance and repair work | ||
Topical note | Notes on tilting the cab | ||
Note on calculation of tightening torque when using insertion or socket tools with various effective lengths | |||
| Check | ||
1.1 | Move vehicle to driving level using level control system operating unit. | For vehicles with code A1A (Air-sprung front axle) | |
1.2 | Load vehicle so as to be as close to primary operating conditions as possible. | On vehicles without code A1A (Air-sprung front axle) | |
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 | Remove noise encapsulation underneath steering gear (1). | Only on vehicles in which elbow fitting (2) is installed. | |
5 | Open maintenance flap. | ||
6 | Tilt cab. | ||
7.1 | Replace elbow fitting (2) with elbow fitting (3). | On vehicles in which elbow fitting (2) is installed. | |
The elbow fitting (3) can be ordered using part number A 004 997 20 71 (line Ø 15 mm) or A 006 997 20 71 (line Ø 12 mm) and remains installed after the test. | |||
Union nut, steering gear oil line/hose | |||
Oil pressure line fitting to steering gear | |||
7.2 | Install adapter (13) between oil pressure line (7) and oil pressure hose (8). | On vehicles in which no elbow fitting (2, 3) is present. | |
Collect escaping oil in suitable container. | |||
Union nut, steering gear oil line/hose | |||
Leitungs-Ø 15 mm | |||
Leitungs-Ø 12 mm | |||
8.1 | Unscrew screw plug (3.1) from elbow fitting (3). | On vehicles in which elbow fitting (3) is installed. | |
Collect escaping oil in suitable container. | |||
8.2 | Unscrew screw plug (13.1) from adapter (13). | On vehicles in which adapter (13) was installed. | |
Collect escaping oil in suitable container. | |||
9 | Install test connection (4). | The test connection (4) can be ordered using part number A 942 351 00 69. | |
Test connection to adapter | |||
Test connection to elbow fitting | |||
10 | Connect hose (5) to manometer (6). | Pressure gage | |
Hose | |||
11 | Unscrew cap from test connection (4). | ||
12 | Connect hose (5) to test connection (4). | ||
13 | Disconnect electrical connector from power-steering pump solenoid valve. | Only on vehicles with code C6P (Power steering pump, electronically controlled) | |
14.1 | Fill and bleed steering gear oil. | If elbow fitting (2) was replaced with elbow fitting (3) or adapter (13) was installed. | |
Leave front axle raised after bleeding. | |||
14.2 | Check steering gear oil level and correct if necessary. | If only test connection (4) was installed. | |
Steering gear oil | |||
15 | Position front wheels centrally on turn plates. | ||
16 | Tilt back cab. | Make sure that the hose (5) and the pressure gauge (6) are not trapped. | |
17 | Start engine and run at idle speed. | ||
18 | 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. | | |
19 | 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. | | |
20 | Note down measured pressure. | ||
21 | 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. | | |
22 | Note down measured pressure. | ||
23 | Move front wheels to straight-ahead position. | ||
24 | Switch off engine. | ||
25 | Compare noted pressures with specified adjustment pressures of steering limitation valves. | Adjustment pressure for steering limiter | |
If noted pressures do not match specified adjustment pressures of steering limitation valves: | |||
| |||
Set hydraulic steering limiters. | |||
Adjustment pressure for steering limiter | |||
Screw-in depth of setting screw for hydraulic steering limiter (distance between bolt head of setting screw and steering gear housing) | |||
Screw plug for setting screw of hydraulic steering limiter to steering gear | |||
Pressure gage | |||
Hose | |||
Leitungs-Ø 15 mm | |||
Leitungs-Ø 12 mm | |||
26 | Tilt cab. | ||
27 | Connect electrical connector at power-steering pump solenoid valve. | Only on vehicles with code C6P (Power steering pump, electronically controlled) | |
28 | Detach hose (5) from test connection (4). | Collect escaping oil in suitable container. | |
29 | Screw cap onto test connection (4). | ||
30 | Detach hose (5) from manometer (6) and seal all connections. | ||
31 | Remove test connection (4). | Collect escaping oil in suitable container. | |
32.1 | Screw screw plug (3.1) into elbow fitting (3). | On vehicles with elbow fitting (3). | |
Screw plug to elbow fitting | |||
32.2 | Screw screw plug (13.1) into adapter (13). | On vehicles in which adapter (13) was installed. | |
Screw plug to adapter | |||
33 | Remove adapter (13) and attach oil pressure hose (8) to oil pressure line (7). | Only if this was necessary for testing the adapter (13). | |
Collect escaping oil in suitable container. | |||
Union nut, steering gear oil line/hose | |||
34 | Raise vehicle at front axle. | ||
35 | Remove all turn plates. | ||
36 | Lower vehicle back onto floor. | Only if no adapter (13) was necessary for the test. | |
37.1 | Fill and bleed steering gear oil. | If adapter (13) was necessary for the test. | |
After bleeding, lower vehicle back onto floor again, but do not yet tilt back cab. | |||
37.2 | Check steering gear oil level and correct if necessary. | If no adapter (13) was necessary for the test. | |
Steering gear oil | |||
38 | Tilt back cab. | ||
39 | Close maintenance flap. | ||
40 | Attach noise encapsulation underneath steering gear (1). | Only if noise encapsulation was removed. | |
41 | Connect diagnostic system, start XENTRY and perform quick test. | Only on vehicles with code C6P (Power steering pump, electronically controlled) | |
42 | Clear fault memory in level control (CLCS) control unit (A26). | Only on vehicles with code C6P (Power steering pump, electronically controlled) | |
43 | End XENTRY and remove the diagnostic system. | Only on vehicles with code C6P (Power steering pump, electronically controlled) | |
44 | Conduct a road test. | During the test drive, check the overall steering ability of the vehicle. | |
45 | Check steering gear (1) or connecting point between oil pressure line (7) and oil pressure hose (8) for leak tightness. | Visual inspection. |
Test values for steering gear |
Number | Designation | Model 963 (Left-hand drive vehicle) with code C6F, without code A1A, | Model 963 (Right-hand drive vehicle) with code C6F, without code A1A, | ||||
BE46.20-N-1001-01J | Adjustment pressure for steering limiter | Vehicle unladen | Steering to left | Specified value | bar | 50 (+10) | 30 (+10) |
at engine speed | 1/min | 800 | 800 | ||||
Steering to right | Specified value | bar | 30 (+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 | Model 963 with code C6F and A1A | ||||
BE46.20-N-1001-01J | Adjustment pressure for steering limiter | Vehicle unladen | Steering to left | Specified value | bar | 40 (+10) |
at engine speed | 1/min | 800 | ||||
Steering to right | Specified value | bar | 40 (+10) | |||
at engine speed | 1/min | 800 | ||||
Load vehicle | Steering to left | Specified value | bar | 40 (+10) | ||
at engine speed | 1/min | 800 | ||||
Steering to right | Specified value | bar | 40 (+10) | |||
at engine speed | 1/min | 800 |
Test values for steering gear |
Number | Designation | Model 963 (Left-hand drive vehicle) with code C6F, without code A1A, | Model 963 (Right-hand drive vehicle) with code C6F, without code A1A, | |
BE46.20-N-1002-01J | Screw-in depth of setting screw for hydraulic steering limiter (distance between bolt head of setting screw and steering gear housing) | mm | > 6 | > 6 |
For picture, see | ||||
967 589 00 91 00
Adapter
400 589 01 91 00
Hose
963 589 04 91 00
Adapter
000 589 06 21 00
Pressure gage