3022726 - S21 NOISE' GEARBOX / AT TAKE-OFF

On setting off, when the various gears are engaged and the clutch released, or at the start of deceleration, there is a noise (jolt)
Results of the tests
1FIRST CHECKAll OKProblems metOperation
Kingpin attachmentShock absorber/suspension fasteningCondition and attachment of bushes and flexible mountings securing power unit and moving suspension componentsCondition and play on steering balljointsContinue to Step 2Wheel attachments looseRetighten attachments
Power unit flexible mountings damagedReplace the damaged components
Track control arm flexible mountings damagedReplace track control arms
2CHECKING THE CROWNWHEEL AND PINIONAll OKProblems metOperation
Check whether the crownwheel and pinion are worn or damaged, and that the crownwheel attachments are not damagedContinue to Step 3Crownwheel and pinion wornReplace the crownwheel and pinion Op.   2110B20 
3CHECK ON DIFFERENTIAL UNITAll OKProblems metOperation
Check the wear of the satellite carrier bearing or the housing in the differential housingCheck differential bearing preloadContinue to Step 4Casing wornReplace casing Op.   2110D10 
Preload not correctAdjust preload as specified
4CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentFault persistsSearch for the fault starting from another symptom'