OPERATING INSTRUCTIONS RH 90 C E Inspection and servicing OTHER MAINTENANCE
Heating and air conditioning
Additional oil cooling
Change the filter mats in the air intake regulary.
A cooling unit is installed to ensure that the hydraulic system has sufficient oil cooling. The cooling unit (Fig. 3-96:) comprises an electric motor on which a hydraulic pump is mounted. This pumps hydraulic oil constantly through the hydraulic-oil cooler.
The filter mats are located on backside of the driver`seat.
The cooling unit is located in the catwalk in front of the hydraulic-oil cooler.
Fig. 3-97:
 Remove cover (1, Fig. 3-97:) Change filter mats (2)  Fasten cover (1) again.
Fig. 3-96:
The cooling unit is maintenance-free. In the event of a malfunction, the buzzer installed in the cab gives a warning signal.
3-76
BA RH90C(3 720 760.00)-EN
