Reciprocating Compressor M Series
5-32
5.5.8.1 Removing the Crankshaft
z The crankshaft weighs approx. 140 kg(308 lbs). Handling it inappropriately may
cause injury. Remove the crankshaft in an appropriate manner with at least two
other people.
1. Affix curing tape onto the attachment surface of
the crankshaft flywheel so that it is not scratched.
Ensure you have two people and blocks of V
shaped wood to lower the crankshaft onto.
2. Attach the coupling rods (a) (or M20 bolts with a
sufficient length) into the screw holes at both ends
of the crankshaft.
3. Rotate the crankshaft so that the crankshaft
balancer at the seal cover side is positioned at the
bottom.
4. Lift the crankshaft by holding the coupling rods
(a) (or M20 bolts with a sufficient length) that are
attached in Step 2.
5. Pull out the crankshaft until the crankshaft balance
weight (b) at the seal cover side comes to the
position of the main bearing head.
6. Lower the crankshaft so that the crankshaft
balance weight (b) at the seal cover side is
properly placed onto the main bearing head.
7. Lift the crankshaft to pull it out from the
crankcase by holding the coupling rods (a) (or
M20 bolts with a sufficient length) that are
attached in Step 2 and lower onto a block (c).
z Support the bearing axis of the removed
crankshaft using a V-shaped wooden block
so that it is not scratched.
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