Husqvarna PG 530 Workshop Manual page 23

Testing motor shaft alignment
Aligning the planetary motor shaft
The principal reason for misalignment are the contact surfaces between the motor
shaft and the bore of the centre drive pulley.
1. The picture exaggerates a misaligned fit of the centre drive pulley to illustrate the
need to clean or adjust the contact surfaces.
(a) Your marking of the measurement point indicating the maximum deviation
(b) The principal contact surfaces causing the misalignment.
(c) Adjustments of the contact surfaces should align shaft (adjusting point (c) in
from tolerance at (c) (see "If the tolerance is exceeded" on previous page).
the direction indicated).
Start by checking the following:
• The edge of shaft end and corners in
bore should be smooth and free from
grades. (This also apply to the key and
keyway).
• Polish with a fine emery-cloth
or use a precision file.
• Make sure that all contact surfaces are
absolutely clean – use a solvent.
• Repeat the alignment test on previous
page to see if this fixed the misalign-
ment within the tolerance.
IF ALIGNMENT IS STILL NOT
WITHIN TOLERANCE
2. The shape of the shaft end needs to be
adjusted to make it fit with better align-
ment in the bearing assembly bore:
(a) Your shaft base marking indicating
the point of minimum dial reading.
(b) Mark the part of the shaft end which
is straight above your shaft base
marking (a).
• Use a fine file to slightly file the
marked shaft end (b).
• Repeat the alignment test on previous
page to see if you need to adjust the
shaft end further.
• Keep good track of your markings
to better control the alignment
process.
File on a slightly larger area (b) for
each step taken.
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