Section 100-0020
13
SM 1988 Rev 1 11-00
ARTICULATION AND OSCILLATION
PIVOT DIAGNOSIS
Noise and vibration caused by the pivot driveshaft
assembly appear only at certain speeds and generally
come and go as these speeds are approached and
passed. When the driveshaft assembly noise becomes
excessive, it takes the form of a vibration which can be
felt throughout the frame.
Noise from the articulation and oscillation points must
be investigated.
An 'Articulation and Oscillation Pivot Diagnosis' table is
shown below.
Chassis - Articulation and Oscillation Pivot
* * * *
ARTICULATION AND OSCILLATION PIVOT DIAGNOSIS
CONDITION REASON REMEDY
Noise (Pivot Driveshaft) Insufficient lubricant Check seals.
Install proper grade of lubricant.
Out of balance driveshaft assembly Check alignment.
Vibration (Pivot Driveshaft) Backlash due to worn bearings, Renew worn parts.
housings, yokes and trunnions
Yoke not in line Renew driveshaft assembly or
assemble correctly.
Driveshaft out of balance Renew driveshaft assembly.
Noise (Articulation/Oscillation Excessive run out or distorted yokes Dismantle and correct, or renew,
Points) damaged part.
Loose nut on yoke Check splines, if worn. Renew shaft.
Torque tighten nut to value in 'Special
Torque Specifications' in this section.
Insufficient lubricant Lubricate. Investigate/revise lubrication
schedules. Refer to Section 300-0020,
LUBRICATION SYSTEM. Check seals
for lubricant loss/contamination. Renew
as necessary.
Worn bearings/bushes Inspect/renew as necessary.
Courtesy of Machine.Market
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