Magni RTH 4.18, Use And Maintenance Manual

Page: 107 / 127

MAINTENANCE 107
Turret rotation slewing ring gear
Lubrication
Lubricate both the turret axial bearing tracks by means
of the two grease nipples
1 . Inject the grease in a
number of stages and move the turret to distribute it
uniformly.
Lift the telescopic boom to access the turret rotation
gear.
Lubricate the inner teeth of the slewing ring gear 2 .
Apply grease manually using a brush. Ensure that the
grease is distributed uniformly. Remove grease
accumulations.
Checking the tightening of the bolts
Check the turret fixing nuts on the slewing ring gear.
Check for rusted, loose or missing nuts.
Contact your dealer in case of serious problems.
To check the tightening torque loose lock nuts 3 .
Tighten nuts 4 by applying a 570 Nm torque.
Again tighten lock nut 3 . The help of a second operator
may be necessary to hold the screw steady.
To check the fixing screws of the slewing ring gear on
the chassis, align hole
5 with the screw underneath by
rotating the turret.
Tighten the screws by applying a 570 Nm torque.
Repeat the operation for each screw, rotating the
turret from time to time.
Checking reduction gear oil
Retract and lift the telescopic boom completely.
Rotate the turret to the left by about 60° for better
access to the reduction gear.
Check the hydraulic fluid level through the inspection
window
7 . The level is correct when it overflows.
If necessary, top up with oil of the right strength up to
the filler hole
6 .
When checking the oil level, also check the bolts fixing
the reduction gear to the chassis. In case of faults
(rusted, loose or missing bolts), contact your dealer.
Changing the reduction gear oil
Place a suitably sized container under the bleed cap 8 .
Unscrew the cap and drain out the oil.
Close the drainage cap 8 . Add oil through the filler
hole 6 until it reaches the prescribed level.
Lubricate the reduction gear shaft bushes by injecting
grease into grease nipple
9 .
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