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MAINTENANCE
4.10.2 SIGNAL HORN COMPRESSOR - LUBRICATE
See illustration Z 10689
The compressor (2) is located in the cab base.
Fill several drops of thin oil into the lubricator (1).
The oil must be free from resin and acid and must have the lowest
solidifying-point possible (below - 40° C).
REMARK
If the Excavator is equipped with a second signal horn there
is also a second compressor which has to be lubricated in the
same way as the first one.
4.10.3 HYDRAULIC OIL COOLER FAN BEARINGS - CHECK FOR LEAKAGE
AND CLEAN BREATHER FILTER
See illustration Z 21659
Check housing (1) for leakage. If leakage is found, check the oil
level in the bearing housing. Remove oil level plug (2). The oil
level should be at lower edge of the opening. If necessary add oil
through the breather filter adapter pipe. Clean breather filter (3)
with compressed air from inside to outside and install plug (2) and
breather filter (3). Oil loss of the bearing housing indicates worn or
damaged seal rings. To prevent damage to the fan bearings,
install new seal rings.
4.10.4 RADIATOR FAN BEARINGS - CHECK FOR LEAKAGE AND CLEAN
BREATHER FILTER
See illustration Z 21660
Check housing (1) for leakage. If leakage is found, check the oil
level in the bearing housing. Remove oil level plug (2). The oil
level should be at lower edge of the opening. If necessary add oil
through the breather filter adapter pipe. Clean breather filter (3)
with compressed air from inside to outside and install plug (2) and
breather filter (3). Oil loss of the bearing housing indicates worn or
damaged seal rings. To prevent damage to the fan bearings,
install new seal rings.
4.10 EVERY 250 OPERATING HOURS OR MONTHLY
381
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