Setting Clearances; Free Movement Check; Establishing Shim Pack Size - Gardner Denver GD150 Service Manual

6
NOTE
ALLCLEARANCESTOBECHECKED
WHENTHEMACHINEISCOLD&BEFO
RE GREASING!

Setting Clearances

This section requires a Dial Test Indicator (DTI) secured to one end of the
See Fig 17.
Figure 17. Dial Test indicator setup

6.1 Free Movement Check

1. Ensure both bearing housing caps are free of the sideplates,
(screw loose) and pull/push the rotor to one end of its free travel.
2. Zero the DTI on the end of the shaft.
3. Push the rotor to the opposite end and record the DTI reading
This measurement will be in the range of.625-.710mm.

6.2 Establishing Shim Pack Size

1. Push/pull the rotor towards the end to be checked, ensuring the
same axial position achieved in section 6.1.
2. Zero the DTI on the end of the shaft.
3. Slowly tighten the bearing housing cap retention screws, each a
little at a time. Once the bearing housing cap is tightened, record the
DTI reading. Subtract 150-200 microns from the DTI reading to give
the required shim pack size.
4. It is common for the sideplate clearance to be kept to a
minimum of between 150-160 microns.
Use aminimumof1andamaximumof3shimsperbearinghousingcap. (If
possible)
5. Loosen the bearing housing cap screws & leave a
clearance of approximately1-2mm.
Repeat steps 1-5 for the opposite end of the machine.
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