Komatsu 170-3 Series, Руководство по ремонту, Страница: 438 / 454

REPAIR AND REPLACEMENT OF PARTS
15-32
170-3 SERIES
2) When using a work clamp jig for polishing
(When a special polishing machine is not
available)
Use a work clamp jig such as shown in the
diagram on the right.
i)
Use a crankchaft grinding machine under
the following polishing conditions.
Paper:
No. 800
Machining oil: Honing oil
Work speed:
40 rpm
ii) The polishing time for one journal is
approx. 6 minutes. Move the clamp the
amount of play of the clamp and joutnal
width (approx. 5 mm), and move up and
down the journal in the axial direction.
After completing the honing of one jour-
nal, replace the paper with new paper.
When honing the pin journal, it is safter
to carry out the work with the pin journal
is the rotation center.
3) Assembly of work clamp jig and method of
use
i)
Cramping jig for pin journal and main jou-
nal is assembled as shown in the dia-
gram on the right. For details of the
component parts, see the drawings on
sepatate pages.
(7)
CORRECTING SURFACE ROUGHNESS OF CRANKSHAFT
JOURNAL PORTION
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