MSI QI-1000, Technical Manual, Page: 50 / 56

unit can be used to safely heat the bearings. When heating a bearing for installation, the temperature
must not exceed 250 degrees Fahrenheit (121 degrees Celsius). Installation of new tapered roller
bearing cups in the housing should be performed by tapping them into the housing with a soft metal bar
or by pressing them into the housing.
k. Upon reinstallation of the bull gear and pinion shaft, it is extremely important to establish the proper
bearing “pre-load” (.003” to .005”) before operating the pump. This “pre-load” must be accomplished
by obtaining endplay readings with a dial indicator and removing the appropriate thickness of bearing
adjustment shims. If for example there is 0.010” of axial “play”, a total of 0.013”-0.015” of shim stock
thickness shall be removed from the shim set. Silicone liquid gasket material should not be applied to
the bearing retainer until after the bearing pre-load has been set properly.