MTU 20V4000C55, Operating Instructions Manual

Page: 151 / 226

8.18 Fan Drive
8.18.1 Fan drive – Drive belt tension check / adjustment
Preconditions
☑ Engine is stopped and starting disabled.
Special tools, Material, Spare parts
Designation / Use Part No. Qty.
Belt tension tester (optibelt TT3)
Y4345711 1
Torque wrench, 60–320 Nm
F30452768
Preparatory steps
1. Remove protective cover.
2. Check belt condition visually (→ Page 92).
Result: For drive belt replacement (→ Page 154).
Version A – fan drive with belt tensioning pulley
Adjusting fan height
1. Release screws (2) but keep them in position.
2. Relieve tensioning screw (1) and, if necessa-
ry, shift fan clutch (3) downwards.
3. Readjust height of fan clutch (3) with tension-
ing screw (1) until dimension A corresponds
to the dimension specified in the relevant in-
stallation drawing.
4. Tighten screws (2) to specified torque using a torque wrench.
Name Size Type Lubricant Value/Standard
Screw M16x75 Tightening torque 250 Nm +25 Nm
MS15043/00E 2016-04 | Fan Drive | 151
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