B&C Technologies IM Series Industrial Ironer - Manual (Page 68)

4. Loosen filler cap and flush gear box with flushing oil.
5. Tighten drain plug (use new gasket).
5.7.5 Pump Setup and Alignment
When a new machine is started up, a new pump is commissioned, or when service involving
draining the pump is performed the following procedures must be followed.
1. The pump and motor shafts must be properly aligned. The pump shaft must be set 0.010”-
0.015” lower than the motor shaft to allow for thermal expansion of the pump body (see
formula below).
2. The pump seals must be vented and filled with thermal oil. Remove the vent plug on top
of the pump bearing housing and rotate the pump by hand several revolutions or until oil
comes out of the vent. If oil does not come out, pour thermal oil into the vent slowly until it
is completely full and no air is in the pump bearing housing. Replace the vent plug.
3. After the pump has been at operating temperature for 15 minutes the housing bolts must be
retorqued to 30-35 Nm (22-25 ft-lb) to seat the main housing gasket. Failure to perform these
procedures will result in premature seal failure. NEVER start the pump motor, even for a
few seconds, until this has been done!
Pump service procedures can be found in the appendix.
5.7.6 Typical Pump Problems
In normal operation there should be no thermal fluid weeping from the leak-off hole in the pump.
If there is fluid leaking, the pump seals have been damaged. Following is a description of common
ways seals are damaged:
Mechanical seal failures on this type pump are normally attributable to installation or system
operating errors more than true defects in the materials. The normal causes of failure (leaking
seals) is misalignment which in turn is caused by:
1. Failure of the installing contractor to set the electric motor high in relation to the pump cen-
terline when all equipment is cold. This thermal offset (0.00000635 x distance in inches from
pump foot to pump centerline x thermal fluid operating temperature in degrees F) is re-
quired so that when the system is hot and operating the pump and motor have the same
shaft centerlines and the mechanical seal faces are thus in line and tight.
2. A second cause of mis-alignment is severe pipe stress caused by using the pump as an an-
chorage point for the discharge pipe and header. (B&C uses flexible couplings to eliminate
pipe stresses).
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