E-6 Turret rotation slewing ring
gear - change reduction gear oil
- check play
Changing the rotation reduction gear oil
1 Place a suitable sized container under the
bleed cap 3. Unscrew the cap and drain
out the oil.
2 Close the drainage cap 3. Add oil through
the filler hole 2 up to the prescribed level
visible through the transparent bush 1.
3 Lubricate the reduction gear shaft bushes
by injecting grease into grease nipple 4.
Check the slewing ring gear bearings
for wear
The factory setting of the play of the bearings
is between 0.05 and 0.25 mm.
The slewing ring gear must be replaced if the
wear limit value exceeds 2.2 mm; to check the
bearings for wear, proceed as described
below.
1 Park the vehicle stably on level ground,
align the turret to the chassis axis, without
load.
2 Lubricate both the turret axial bearing
tracks by means of the two grease nipples
provided inside, and apply grease
manually to the outer teeth of the slewing
ring gear using a brush. Refer to chapter
B-6 for the grease brand
3 Check tightening of bolts fastening turret
rotation slewing ring gear, referring to
chapter D-5.
4 Start the machine from the ground
controls and fully elevate, but do not
extend, the primary boom and jib. The
riser should remain in its stowed position.
5 Place a dial indicator with accuracy of
0.01, between the drive chassis and the
turntable at a point that is directly under,
or in line with, the boom and no more than
1inch/2.5cm from the bearing.
a turret
b dial indicator
c drive chassis
d turret rotation bearing
6 6Adjust the dial indicator need to the “zero”
position.
7 Elevate the riser, but do not extend it.
Move the primary boom and jib to
horizontal and fully extend.
8 Note the reading on the dial indicator. If
the measurement is less than 2.2mm, the
bearing is good. Otherwise, the bearing is
worn and needs to be replaced.
9 Remove the dial indicator and rotate the
turntable 90°.
10 Repeat steps 5 through 9 until the rotation
bearing has been checked in at least four
equally spaced areas 90°apart.
11 Lower the boom to the stowed position
and turn the machine off.
12 Remove the dial indicator from the
machine.
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