BA 35101/02/ 03 EN – Edition 1.0 * 35101_02_03b510.fm 5-15
Maintenance
Monitoring the hydraulic oil and the reflux filter
On the indicating instrument, the red telltale 78 monitors the reflux pressure and the reflux
filter, and gauge 41 monitors oil temperature.
Telltale 78 on the indicating instrument comes on if the flow resistance in the
reflux filter is too high!
☞ The filter element is dirty and must be replaced
☞ Drain the hydraulic oil in case of increased contamination, however after
1500 s/h at the latest or once a year
☞ The filter element and the hydraulic oil may be replaced by an authorised
workshop only!
The operating temperature of the hydraulic oil is too high if the needle
of gauge 41 is in the red range
☞ Check the hydraulic oil level (not enough oil in the tank)
☞ Replace the filter element (highly contaminated filter)
Telltale 78 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 telltale goes out
• Bear in mind the instructions concerning warmup – see chapter 3 “Starting the
engine” on page 3-16
Fig. 170: Preheating start switch
78
41
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