ALSTOR 822 - Page 52

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Instruction manual
SERVICE AND MAINTENANCE
850/850 H
3.7 INSTRUCTIONS FOR OIL/FILTER REPLACEMENT, 850/850 H
Hydraulic oil control/change
NOTE: Always unload the crane before inspection and replacement of the oil. Park the crane as illustrated in the unloaded position.
DONOT place the crane in the raised position.
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When replacing the hydraulic oil, the hydraulic lter should also be replaced; see below.
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Park the crane in an unloaded position according to gure 1.
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Loosen the undercover. NOTE: Keep avessel of at least 50 litres underneath and open the bottom plug (2) located on the bottom of the
tank to drain the oil.
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Once the oil is drained, reinstall the bottom plug (2). Always change 2 × hydraulic lters (3) once the oil has been drained, and rell
with recommended oil (see the table on page 42) to the lower portion of the sight glass, see (4).
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Replace the oil ller plug (5).
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Allow the machine to run warm for at least 5 minutes, and check and adjust so that the oil level is centred in the sight glass.
Reassemble the undercover.
Hydraulic oil lter
The machine has two hydraulic oil lters (3).
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Loosen the undercover under the front chassis.
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Unscrew the cover screws anti-clockwise and replace the lter
inserts.
Lubricate the new lter sealing ring with hydraulic oil.
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Screw back the new lter.
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Reinstall the undercover under the front chassis.
4
5
2
3
1