Procedures
Draining and Filling / Bleeding Hydraulic SystemOil grade
Hydraulic oil
Filling Capacities:
Permissible oil consumption
For 10000 km = max. 0.4L
Special Tools:
Conventional tools
Open double box wrench 10 x 11 mm
Open double box wrench 12 x 14 mm
Note
- For tightening pressure lines, use open box wrenches, but by no means standard open-end wrenches, to avoid damaging line connections. For better accessibility of individual line connections, for example on level controller, a special wrench has been developed.
- For hollow screws and screw connections use only solid copper sealing rings of specified dimension. Renew sealing rings on principle.
Attention!
- Pressure oil pumps MB and Teves operate on self- lubrication, that is, the delivered oil serves simultaneously as a lubricant.
- In the event of a defect on level control system which leads to complete loss of hydraulic oil, and when vehicle cannot be repaired immediately, make sure that pressure oil pump Teves is not drawing any air. If required, remove driver of pump drive.
- On engines 615,616,617, 116 and 117 do not re-move driver together with pressure oil pump MB in the event of a defect on level control system, since otherwise the running engine will damage the intermediate gear shaft and the camshaft
Draining the system
1 Open bleed screw (11a) on distributor (1st version up to February 1977) or on level controller (2nd version starting March 1977) and catch the oil (approx. 0.5L) in a suitable, clean vessel.
1st version up to 2/77
2nd version starting 3/77 up to 8/85
11a Bleed screw
061 Oil drain hose
Version starting 9/85
2 Fill caught oil suitably through filling funnel with filter (60) into fluid reservoir (2) in engine compartment.
Fluid reservoir, metal version
Fluid reservoir, plastic version up to 8/85
Fluid reservoir, plastic version starting 9/85
2 Fluid reservoir
2a Closing cap with oil dipstick
9 Holder for fluid reservoir
9c Holding spring
A Suction line fluid reservoir - pressure oil pump
C Return flow line level controller - fluid reservoir
Filling the system
3 Check oil level in fluid reservoir. To fill system with spring struts empty, oil level should be approximately at max. mark (a).
Fluid reservoir, metal version
2 Fluid reservoir
2a Closing cap with oil dipstick
a Max. mark
b Min. mark
c Return flow line level controller - fluid reservoir
Fluid reservoir, plastic version up to 8/85
2 Fluid reservoir
2a Closing cap with oil dipstick
a Max. mark
b Min. mark
c Return flow line level controller - fluid reservoir
Fluid reservoir, plastic version starting 9/85
2a Closing cap with oil dipstick
2c Cover with connection
2d Rubber sealing ring
2h Filter element
2i Closing nut
a Max. mark
b Min. mark
A Suction line fluid reservoir- pressure oil pump
C Return flow line level controller - fluid reservoir
4 Run engine for approx. 1 minute at medium speed. While filling up, load vehicle rear in trunk with approx. 150 kg or hold down so that level controller can be set to "filling".
Note: The system can also be filled with connecting rod disconnected on lever of level controller in position "F" (filling). For this purpose, run engine at medium speed for approx. 30 seconds. Then mount connecting rod again.
F = Filling position
L = Emptying position
5 Check oil level in fluid reservoir with engine stopped and correct, if required. In operational system in ready for driving condition the oil level should be between the "max." and "min." marks. On fully loaded vehicle the oil level is therefore at "min." mark.
Attention! Use specified hydraulic oil grades only.