Propeller Shaft
PR-1
Propeller Shaft
Technical Parameter
Maintenance Standard
Unit: mm
Tightening Torque
Unit:N.m
Trouble Analysis
Type
Open type, tubular propeller shaft, two segments. The front
segment is midship shaft with bearing, the rear is double uni-
versal joints with flange inner slide
Universal joint type Spider type
Center bearing Slide a little along lengthways in the center bearing seat
Universal joint max oscillatory angle
± 20°
Max spline slippage (mm) 54
Item Standard dimension Service limit Remark
Radial motion of propeller shaft
0
~0.75
1.5
Slip spline backlash
0.025
~0.115
0.4
Clearance of universal joint and needle bear-
ing
-0.1
Axial clearance of center bearing - 0.5
Center bearing bearing seat inside hole sur-
face worn
-0.05
ItemItem Tightening Torque
Propeller shaft flange fork connecting nut
90
~110
Center bearing locking bolt and nut
901
~10
Trouble Cause Method
Abnormal vibration in the
running
Connecting bolts on the propeller shaft loosely Tighten bolts or nuts
Propeller shaft vibration
Propeller shaft has not been reassembled in
accordance with the mark on it
Propeller shaft tube is bent
Renewed major components without dynamic
balance
Center bearing rubber washer slacken or failed
Reassemble it in accordance
with the mark
Check or renew
Dynamic balance correct
Tighten or replace
Universal joint or slip yoke
worn out early
Oil seal failed
Not fill grease regularly or not fill enough oil
Replace
Fill with enough lubricating
grease periodically
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