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Coupling Hub Removal:
•
Have removal tool part number 90500152 available – contact Gardner Denver for sourcing
details. Before removing an interference-fitted hub, note and record the position of the hub with
respect to the end of the companion shaft. This is particularly critical if an installation tool is not
available.
•
Assemble the removal tool unto the hub as shown in Figure 8-4. Make sure that the shaft
protector piece is captured between the puller screw and the end of the shaft
•
Apply torque to the puller screw with a suitable torque wrench in order to pull hub away from the
shaft. If the torque applied to the puller exceeds 75ft-lb (8.4N-m), it indicates that a heavy
interference fit between the hub and the shaft exists and heat dilation must be used to expand the
hub and loosen its grip on the shaft surface. Secure a suitable heating source and apply heat the
hub body while slowly rotating the shaft by means of the removal tool handle. Once the hub body
has expanded enough, the present tension of the removal tool will pull the hub away from the
shaft.
Heated surfaces of coupling hubs and installation or removal tools may cause
severe burns. Make sure to use suitable heat protective gloves and clothes.
N
N
N
O
O
O
T
T
T
I
I
I
C
C
C
E
E
E
If heat was applied to the [compressor] coupling hub during its removal, there
is the possibility that the compressor shaft seal was damaged and it must be
replaced. Contact Gardner Denver for further instructions.
Figure 8-4 – COUPLING REMOVAL TOOL – VS40 MODEL SHOWN