Model | 374, 375.3/4, 930, 932, 933, 934, 940, 942, 943, 944, 950, 952, 953, 954, 957 with steering gear 765.82 |
Mercedes-Benz/ThyssenKrupp steering | |
Model | 375.1, 970, 972, 974, 975, 976 with steering gear 765.83 |
Mercedes-Benz/ThyssenKrupp steering | |
Model | 375.1, 970, 972, 974, 975, 976 with steering gear 765.84 |
Mercedes-Benz/ThyssenKrupp steering |
1 | Screw plug |
2 | Sealing ring |
3 | Pressure gage |
4 | Hose |
5 | Test connection |
6 | Steering limiter adjustment screw |
7 | Steering limiter adjustment screw |
8 | Pressure limiting valve |
W46.25-1085-12
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 | |||
Notes on hydraulic fluid as per specification Sheet 345.0 | |||
| Check | ||
1.1 | Move vehicle to driving level using level control system operating unit. | On vehicles with code A00 (Air-sprung front axle) | |
1.2 | Load vehicle so as to be as close to primary operating conditions as possible. | On vehicles without code A00 (Air-sprung front axle) | |
In individual 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 | Raise vehicle at front axle until wheels can turn freely. | ||
5 | Open maintenance flap. | ||
6 | Tilt cab. | ||
7 | Unscrew screw plug (1) with sealing ring (2). | Collect escaping oil in suitable container. | |
8 | Install test connection (5). | The test connection (5) can be ordered using part number A 942 351 00 69. | |
Test connection to steering gear | |||
9 | Connect hose (4) to manometer (3). | Pressure gage | |
Hose | |||
10 | Unscrew cap from test connection (5). | ||
11 | Connect hose (4) to test connection (5). | ||
12 | Check steering gear oil level and correct if necessary. | Vehicles without code ZP0 (Preparation for cold climate package) or code ZP1 (Cold climate package)Steering gear oil (ATF) | |
Vehicles with code ZP0 (Preparation for cold climate package) or code ZP1 (Cold climate package)Hydraulic fluid | |||
13 | Loosen counternuts of steering limitation setting screws (6, 7). | ||
14 | Completely screw in steering limitation setting screws (6, 7). | The jam nuts must make contact with the head of the steering limiter adjustment screws (6, 7) and with the steering gear. | |
15.1 | Unscrew steering limitation setting screw (6) for left steering limitation by six turns and steering limitation setting screw (7) for right steering limitation by eleven turns, and tighten counternuts. | Steering gear 765.82 on left-hand drive vehicle | |
Do not unscrew the steering limiter adjustment screws (6, 7) by more than the specified number of turns. | |||
Jam nut of adjustment screw for steering limiter | |||
15.2 | Unscrew steering limitation setting screw (6) for right steering limitation by six turns and steering limitation setting screw (7) for left steering limitation by eleven turns, and tighten counternuts. | Steering gear 765.82 on right-hand drive vehicle | |
Do not unscrew the steering limiter adjustment screws (6, 7) by more than the specified number of turns. | |||
Jam nut of adjustment screw for steering limiter | |||
15.3 | Tighten steering limitation setting screws (6, 7) both for left and right steering limitation by six turns, and tighten counternuts. | Steering gear 765.83/84 | |
Do not unscrew the steering limiter adjustment screws (6, 7) by more than the specified number of turns. | |||
Jam nut of adjustment screw for steering limiter | |||
16 | Tilt back cab. | Make sure that the hose (4) and the pressure gauge (3) are not trapped. | |
17 | Start engine and run at idle speed. | ||
18 | Turn steering left or right several times using normal force of the hand until a 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 (3) 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 (3) 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 intended rated pressure. | Rated pressure (= governed pressure of pressure limiting valve in steering gear) | |
If both pressures are equally high and match the intended rated pressure: | |||
| |||
Look for cause of possible problems in power-steering pump or mechanical component parts (pressure limiting valve (8), seals in steering gear and, if applicable, in auxiliary hydraulic cylinder are OK). | |||
If one of the two pressures is below the intended rated pressure, but the other pressure matches the intended rated pressure and the vehicle does not have an auxiliary hydraulic cylinder: | |||
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Replace steering gear (power steering pump and pressure limiting valve (8) can be ruled out as cause of problems). | |||
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If one of the two pressures is below the intended rated pressure, but the other pressure matches the intended rated pressure and the vehicle has an auxiliary hydraulic cylinder: | |||
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Remove hydraulic lines to hydraulic cylinder from steering gear or hydraulic cylinder, seal connections with suitable stop plugs so that a leakage in the hydraulic cylinder can be ruled out, and repeat test. | |||
For an M18x1.5 inside thread, use stop plugs with part number A 000 997 70 73. For other thread sizes, procure stop plugs commercially. The stop plugs must be designed for a pressure of approx. 200 bar. | |||
Union nut, steering gear oil line/hose | |||
If one of the two pressures is still below the intended rated pressure, but the other pressure matches the intended rated pressure: | |||
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Replace steering gear (power steering pump, pressure limiting valve (8) and hydraulic cylinder can be ruled out as cause of problems). | |||
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If both pressures are equally high and match the intended rated pressure: | |||
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Replace hydraulic cylinder (steering gear can be ruled out as cause of problems). Then reconnect hydraulic lines to steering gear or hydraulic cylinder. | |||
Remove/install hydraulic cylinder of 1st front axle | |||
Remove/install hydraulic cylinder of 1st front axle | |||
Union nut, steering gear oil line/hose | |||
If both pressures are equally high, but deviate from the intended rated pressure: | |||
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Replace the pressure limiting valve (8) and repeat the test. | |||
If both pressures are equally high after replacing pressure limiting valve (8), but are below the intended rated pressure: | |||
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Check delivery rate and oil pressure of power-steering pump (in order to rule out a defect in power-steering pump). | |||
If delivery rate and oil pressure of power steering pump are OK and vehicle does not have an auxiliary hydraulic cylinder: | |||
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Replace steering gear. | |||
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If delivery rate and oil pressure of power steering pump are OK and vehicle is equipped with an auxiliary hydraulic cylinder: | |||
| |||
Remove hydraulic lines to hydraulic cylinder from steering gear or hydraulic cylinder, seal connections with suitable stop plugs so that a leakage in the hydraulic cylinder can be ruled out, and repeat test. | |||
Union nut, steering gear oil line/hose | |||
If both pressures are still below the intended rated pressure: | |||
| |||
Replace steering gear. | |||
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| |||
If both pressures are equally high and match the intended rated pressure: | |||
| |||
Replace hydraulic cylinder (steering gear can be ruled out as cause of problems). Then reconnect hydraulic lines to steering gear or hydraulic cylinder. | |||
Remove/install hydraulic cylinder of 1st front axle | |||
Remove/install hydraulic cylinder of 1st front axle | |||
Union nut, steering gear oil line/hose | |||
26 | Position front wheels centrally on turn plates. | ||
27 | Adjust hydraulic steering limiter. | ||
Adjustment pressure for steering limiter | |||
Jam nut of adjustment screw for steering limiter | |||
Pressure gage | |||
Hose | |||
28 | Tilt cab. | ||
29 | Detach hose (4) from test connection (5). | Collect escaping oil in suitable container. | |
30 | Screw cap onto test connection (5). | ||
31 | Detach hose (4) from manometer (3) and seal all connections. | ||
32 | Remove test connection (5). | Collect escaping oil in suitable container. | |
33 | Install screw plug (1) with new sealing ring (2). | Test connection screw plug to steering gear | |
34 | Check steering gear oil level and correct if necessary. | Vehicles without code ZP0 (Preparation for cold climate package) or code ZP1 (Cold climate package)Steering gear oil (ATF) | |
Vehicles with code ZP0 (Preparation for cold climate package) or code ZP1 (Cold climate package)Hydraulic fluid | |||
35 | Tilt back cab. | ||
36 | Close maintenance flap. | ||
37 | Raise vehicle at front axle, remove all turn plates and lower vehicle back onto floor. | ||
38 | Conduct a road test. | During the road test check the overall steering behavior of the vehicle. | |
39 | Check steering gear for leak tightness. | Visual inspection. |
Steering |
Number | Designation | Steering gear 765.82 in model 374, 375, 930.0/11/14/16/2, 932.0/14/16/2, 933, 934.0/14/16/2, 940, 942, 943, 944, 950, 952, 953, 954, 957, 958 without code AN9 | Steering gear 765.82 in model 374, 375, 930.0/11/14/16/2, 932.0/14/16/2, 933, 934.0/14/16/2, 940, 942, 943, 944, 950, 952, 953, 954, 957, 958 with code AN9 | ||
BF46.00-N-1001-01E | Steering gear oil (ATF) | Filling capacity | Liter | 4,5 | 6,5 |
Sheet | |||||
Sheet | |||||
Sheet | |||||
Sheet | |||||
Steering |
Number | Designation | Steering gear 765.82 in model 930.182/183, 934.182 without code AN9, ZP0, steering gear 765.82 in model 932.182/183 without code AN9, ZP0, ZP1 | Steering gear 765.82 in model 930.182/183, 934.182 with code AN9, without code ZP0, steering gear 765.82 in model 932.182/183 with code AN9, without code ZP0, ZP1 | ||
BF46.00-N-1001-01E | Steering gear oil (ATF) | Filling capacity | Liter | 4,5 | 6,5 |
Sheet | |||||
Sheet | |||||
Sheet | |||||
Sheet | |||||
400 589 01 91 00
Hose
000 589 06 21 00
Pressure gage
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