Checking the pressure characteristic of the steering pump |
Checking the pressure characteristic of the steering pump |
Checking the pressure characteristic of the steering pump |
Checking the pressure characteristic of the steering pump |
1. Illustrative material on the procedures for checking the pressure characteristic of the power steering pump is presented in the illustrations, to which all references found in the text refer.
2. Open the cover (30g) and pump out the hydraulic fluid from the steering pump reservoir.
3. Disconnect the pressure expansion hose (30i) from the pump and connect the adapter (038a) to the latter.
4. Connect the adapter nozzle (038b) to the pump nipple.
5. Connect the pressure gauge (039) between the adapter nozzles (038a and 038b).
6. Fill the power steering reservoir with fresh fluid to the required level.
7. Start the engine and increase its speed to 1000 rpm.
8. Close the throttle valve (039a) and read the maximum operating pressure of the power steering pump from the pressure gauge - try to read the reading as quickly as possible to avoid the risk of oil overheating. Compare the measurement result with the nominal value (see Specifications).
Information copied from the website: MercedesMAN
9. Turn off the engine and pump out the oil from the power steering reservoir.
10. Remove the pressure gauge and restore the original connection of the hydraulic lines, - do not forget to replace the O-ring on the expansion hose union connector (30i).
11. Fill the tank with the required amount of fresh liquid (see Chapter Checking fluid levels, leak control).
12. Finally, visually inspect the power steering hydraulic system for signs of developing leaks.