Rotary switch and tip switch – front wiper, washer pump

Monitoring the hydraulic oil and the return filter

42 43

Fig. 41: Preheating start switch Two indicator lights on the indicating instrument monitor the return filter (dirt) and the oil temperature • Indicator light 42 – oil temperature • Indicator light – return filter flow (dirt)

Caution!

Indicator light 43 on the indicating instrument comes on if the flow resistance in the return filter is too high!

The filter element is dirty and must be replaced by an authorised workshop The indicator light 42 on the indicating instrument comes on if the operating temperature of the hydraulic oil is too high!

Check the hydraulic oil level (not enough oil in the tank)

The filter element or the hydraulic oil is dirty and must be replaced by an authorised workshop

Notice!

Indicator light 42 on the indicating instrument can come on in cold weather immediately after starting the engine. This is caused by increased oil viscosity. In this case: •Set engine speed so that the indicator light goes out •Bear in mind the instructions concerning warmup

Checking the hydraulic oil level

B

Fig. 42: Oil level sight glass on the hydraulic oil tank

Danger!

Danger of burns! Do not carry out maintenance work on a hot engine and hydraulic system!

Wait at least 10 minutes after stopping the engine

Wear protective gloves and clothing during maintenance work

Check the oil as follows: •Park the machine on level ground •Retract all hydraulic rams •Stop the engine and remove the ignition key •Apply the parking brake •Open the engine cover •Check the oil level in sight glass B If the oil level is visible in the lower half of the oil level sight glass

OK If the oil level is not visible in the oil level sight glass (not enough oil)

Fill up the hydraulic oil

Notice!

If the hydraulic oil in the sight glass is cloudy, this indicates that water or air has penetrated the hydraulic system. Have the hydraulic system immediately checked by an authorised workshop!