Inspect the casing for cracks and excessive wear or pitting. Thoroughly clean gasket surfaces and align-
ment fits in order to remove rust and debris.
Repair or replace the casing if you notice any of these conditions:
•
Localized wear or grooving that is greater than 3.2 mm | 1/8 in. deep
•
Pitting that is greater than 3.2 mm | 1/8 in. deep
•
Irregularities in the casing-gasket seat surface
Casing areas to inspect
The arrows point to the areas to inspect for wear on the casing:
Impeller replacement
Inspect impeller vane edges for excessive cracks, pitting or corrosion damage. Replace impeller if exces-
sively worn or defective.
Gaskets, O-rings, and seats replacement
WARNING:
Risk of death or serious injury. Leaking fluid can cause fire and/or burns. Replace all gaskets
and O-rings at each overhaul or disassembly.
Motor support
Inspect the motor support for any cracks or excessive corrosion damage. Replace if necessary.
Motor shaft check
Check the shaft for straightness or excessive wear, including thread wear or galling. If damage is evi-
dent, contact Baldor authorized motor repair center for motor repairs.
5.4 Reassembly
5.4.1 Reassemble the pump
1.
Check the vent hole in the adapter 340 to be sure it is clear.
2.
Clean and remove any burrs from all mating metal surfaces, including shaft and impeller bore.
3.
Install new O-ring (496).
4.
Fasten casing and motor mount together.
5.
Install mount on motor flange, align and fasten.
6.
Push impeller on the shaft until seated. Push suction cover liner into casing and measure clearance
between impeller and liner. Feeler gauges can be used with larger pumps by reaching in the suction
opening.
An alternate method, recommended for smaller pumps, is to bend a short length (1") of soft solder
over each vane and tap the liner into position. Measure the thickness of the compressed solder
strip.
7.
Use impeller shims (330) for total thickness of the measured thickness, minus the amount shown in
the impeller shim thickness table below.
8.
Remove liner and impeller and install shim in impeller bore.
9.
Install key and reinstall impeller on motor shaft. Secure with washer (199) and cap screw (370C).
Tighten impeller hardware according to information in
Impeller hardware torque values
table.
10. Push suction cover liner into casing bore. Check that the lip contacts the casing rather than the face
against the impeller.
5.4 Reassembly
20
JCU Installation, Operation, and Maintenance Manual
Содержание GOULDS PUMPS JCU
Страница 1: ...Installation Operation and Maintenance Manual JCU ...
Страница 2: ......
