Repairs Motors and Gears Axes 4-6
Product Manual IRB 6400R 23
4.9 Adjusting play in axis 5
Refer to foldout.2:11.
1. Remove the cover <2:11/38>. Investigate the cause of the excessive play on axis 5.
Then take action as described in one of the following alternatives:
A. The intermediate gear unit <2:11/37> is stuck, the play between gears
<2:11/5> and <2:11/34> is excessive. The play must be 0 to 0.08 mm,
measured at three different points.
Action: Adjust the play as described in Chapter 4.9.1, Adjusting the intermedi-
ate gear unit.
B. The intermediate gear unit <2:11/37> has become loose. Check that the gears
<2:11/5> and other parts (<2:11/18>, <2:11/20>, <2:11/21>, <2:11/22> and
<2:11/43>) are not damaged or loose.
Action: Replace damaged parts and adjust the play as described in Chapter
4.9.1, Adjusting the intermediate gear unit
C. There is play in the bearings of the intermediate gear unit <10/105>.
Action: Adjust the bearing as described in Chapter 4.9.2, Adjusting the interme-
diate gear unit bearings and adjust to the correct play as described in Chapter
4.9.1, Adjusting the intermediate gear unit.
4.9.1 Adjusting the intermediate gear unit
Refer to foldout. 2:11.
1. Remove the wedges <2:11/21>. Check that they are not damaged.
2. Adjust the intermediate gear unit <2:11/105> with the centre screw <2:11/18>. The
gear mesh play between the pinion <2:11:1/2> and the gearwheel must be
0 - 0.08 mm. Measure the play at three different places. Use the tool 6896 134-CE
and a dial indicator on a magnetic foot.
3. Tighten the intermediate gear unit <2:11/105> using the screw <2:11/18>, to a
torque of 93 Nm ± 5%.
4. Mount the wedges <2:11/21> and the 4 tension washers <2:11/43> (fit them as
shown on foldout 2:11).
5. Tighten the wedges alternately with the nuts <2:11/22>. Torque 12 Nm ± 5%. Apply
Loctite 243 to lock the nuts.
Check the gear play after tightening as described in Chapter 4.8, Checking play in
axes 5 and 6
Tightening torque:
Screw for intermediate wheel, item 10:1/18:93 Nm ± 5%
Nuts for wedges, item 10:2/22: 12 Nm ± 5%
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