Operating instructions

7.20 Fan Drive
7.20.1 Fan drive – Drive belt tension check / adjustment
Preconditions
☑Engine is stopped and starting disabled.
Special tools, Material, Spare parts
Designation / Use Part No. Qty.
Optibell 2 belt tension tester
Y4345711 1
Preparatory steps
1. Remove protective cover.
2. Check belt condition visually (→ Page 118).
Result: For drive belt replacement (→ Page 127).
Checking V-belt tension – Rock-
ford S270 fan clutch
1. Switch on belt tension tester.
2. Hold measuring tip of belt tension tester
over belt drive. Tap drive belt (arrow) with a
suitable tool.
3. Hold belt tension tester over belt drive until
the measured value is indicated.
Initial assembly at MTU Initial operation with fan Re-tensioning
None 60 Hz ±1 Hz 52 Hz ±1 Hz
M015675/06E 2013-04 | Task Description | 125
TIM-ID: 0000040744 - 001