Dynapac CC 722C, Maintenance Manual

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17 CC 722/722C M722EN2
EVERY 250 HOURS OF OPERATION (MONTHLY)
Hydraulic system
– changing the filters
Remove the filters and empty the fluid into the spill-oil
container. Discard the filters; they are disposable and
cannot be cleaned.
Ensure that the old gaskets do not remain on
the filter holders. Leakage may otherwise
occur between the new and the old sealing
rings.
Thoroughly clean the sealing surfaces of the filter
holders.
Apply a thin coat of fresh hydraulic fluid to the new filter
gaskets.
Tighten the filters by hand. First, screw on until the filter
seal lies against the filter holder. Then screw a further
half-turn.
Do not tighten the filter too hard; this could
damage the seal.
Start the engine and ensure that no hydraulic fluid leaks
from the filters.
Ensure that ventilation (extraction) is
adequate if the engine is run indoors.
(Risk of carbon monoxide poisoning.)
Check the fluid level in the sight glass (2) and top off as
required.
When you read the filter indicator, the hydraulic fluid
should be warm and the engine running at full revs.
Ensure that the air flow through the radiator is unob-
structed. Clean a dirty radiator with water or com-
pressed air. Blow the radiator in the opposite direction
to that of the cooling air. Ensure that seals and noise
absorbers are not damaged by the cleaning operation.
Wear protective goggles when working
with compressed air.
Fig. 21 Hydraulic fluid system
1. Filter
2. Sight glass
2 1
CAUTION
WARNING
CAUTION
WARNING