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Level check
Position the machine on a fl at surface. Clean the
component before it is opened for reading or fi lling
in order to prevent dirt entering the system. If the oil
level is low, refi ll with the type and quality as per the
’Hydraulic fl uid and lubrication” table in the ’Technical
data” section.
Hydraulic oil
• Manoeuvre the machine so the arm system’s cyl-
inders are retracted and the outriggers are com-
pletely folded.
• Refi lling is needed if the level is more than one cm
below the max mark.
Slew reduction gear unit
• Locate and loosen the dipstick. Wipe it clean, lower
it and read off the level.
Drive motor, drive gear
• Manoeuvre the machine until one of the plugs is
level with the middle of the hub and the other one
is at the top position.
• Unscrew the level plug. The oil level should reach
up to the hole.
Hammer lubrication
• Check that there is grease in the receptacle.
MAINTENANCE AND SERVICE
Wear and damage
General
NB! Deal with worn components as quickly as pos-
sible. There is an increased risk of mechanical break-
down if the machine is used despite damaged or worn
components.
Wear of shafts and slide bearings
Bearings and any shafts necessary must be replaced
in the event of play in joints and cylinder mountings.
Replace or repair damaged components.
• If there is play in joints the bearings must always
be replaced.
• Shafts must be replaced if they have wear damage.
If there is wear damage on an expanding sleeve it
indicates that it has not been suffi ciently tightened.
• Swing joints must be kept lubricated in order to
be able to press out dirt that enters and to reduce
wear on shafts and bearings.
Wear to rubber components
Check that caterpillar tracks and outrigger feet are
intact. If they are so worn that the metal is visible they
should be replaced.
Wear to hydraulic hoses
Do not use hoses that are distorted, worn or dam-
aged. Make sure that the cords are not visible. Always
have a spare hose on hand. Damaged hoses must be
replaced immediately.
• Check that none of the hoses are rubbing against
sharp edges. Be alert to the risk of abrasive jets.
• Adjust the length of hydraulic hoses so that they
are never entirely stretched.
• Ensure that the hose is not twisted during mount-
ing.
• Avoid severe bends in the hose.
Hydraulic couplings
• Check that the couplings are not damaged. Dam-
aged couplings can damage hoses with the result
that they come off. Change damaged couplings
immediately.
• The hydraulic couplings should be lubricated be-
fore tightening to reduce friction.
Wear to electric cables
WARNING!
The power cable must be disconnected when
electric cables are checked. Check that the
cables’ insulating casings are not damaged.
Change damaged cables immediately.
42 - English