SHB 28Z3 EN – Edition 2.0 * 28z3s710.fm 7-29
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The system switches off automatically if a critical error is detected. Activating the control
unit is only possible by repeatedly switching on the supply voltage.
Only the error occurring last is issued if several errors occur at the same time. We there-
fore recommend troubleshooting one error after another until the diagnosis indicator light
no longer flashes.
7.15 Engine oil service valve
Function
The service valve replaces the conventional oil drain plug by a quick coupler for draining
the engine oil more easily.
• Park the machine on level ground
• Let the engine run until it reaches its operating temperature (oil temperature about 80
°C/176 °F)
• Stop the engine
• Place a container under the opening to collect the oil as it drains
• Unscrew cap A of oil drain valve B
• Screw in the drain coupling with a sufficiently long hose D, ensuring that the end of the
hose is in oil drip tray E
➥ Oil drain valve B opens and the engine oil drains
• Completely drain the oil
• Unscrew drain coupling C
• Screw on cap A of the oil drain valve
• Fill in engine oil – see Filling up engine oil on page 3-18
• Start the engine and let it run briefly at low revs
• Stop the engine
• Wait a moment until all the oil has run into the oil sump
• Check the oil level again
• Fill up if necessary and check again
• Completely remove all oil spills from the engine
Fig. 21: Drain coupling with hose
C
A
B
Fig. 22: Drain coupling with hose
B
C
D
E
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