Oil drain
Remove the engine compartment protective tray. Place a container for drained oil under the gearbox. Unscrew the plug of the oil drain and inspection hole (Fig. 4-53). Unscrew the overflow tube and drain the oil from the gearbox housing. Screw the overflow tube tightly.
Fig. 4-53. Details of the hydromechanical gearbox housing type 01M:
1 — gearbox housing;
2 — hydraulic transformer housing;
3 — lid;
4 - oil pan;
5 — intermediate shaft bearing housing;
6 — lid;
7 — oil filler tube;
8 — oil filler tube plug;
9 — rotation speed sensor;
10 - Multifunctional sensor;
11 - magnet;
12 — gearbox crankcase breather;
13 - sealing gasket;
14 - oil cooler;
15 — overflow tube;
16 — oil drain and inspection hole plug.
Checking the oil level
Warning: The correct filling of oil and setting its required level directly depends on the oil temperature.
[The original can be viewed on the portal VWMANUAL]
The oil temperature in the gearbox sump during testing should be within 35-45°C. Powerful consumers of electricity (air conditioner, headlights, heater fan) must be disconnected. Place the vehicle on a level, horizontal surface. Start the engine at idle speed. Unscrew the oil drain plug without unscrewing the overflow tube. If the oil level in the gearbox sump is correct, the oil should flow out of the oil drain hole drop by drop.
Filling with oil
Without tightening the oil drain plug, unscrew the oil filler tube plug (Fig. 4-54). Insert the tip of the filling device into the oil filler tube. Pour oil into the gearbox housing until it starts to flow out of the oil drain and inspection holes, then tighten the oil filler tube plug, check the oil level (tighten the oil drain plug and tighten it to a torque of 1.5 kgf·m).
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