Maintenance Of Bearings; Bearing Lubrication And Care; Oil Lubrication - Goulds Pumps JC Installation, Operation And Maintenance Instructions

Preventive Maintenance
3. When desired clearance is reached, tighten outboard jam nut securely. Check clearance
4. To increase impeller clearance, loosen inboard jam nut and drive the shaft assembly by
CAUTION: Jam nuts on both sides of bearing frame lugs must be secure. Normal impeller
thrust will tend to decrease the impeller clearance. Impeller rubbing will result from insufficient
jam nut tightening.
Conditions Requiring Adjustments
1. Overheated thrust bearings may develop from uneven adjustment of jam nuts. Check
2. Noise, vibration and wear may result from the impeller rubbing on the suction or hub side
3. Poor performance and wear may result from excessive impeller clearance at the suction
NOTICE: Lubricate adjusting studs (356A) for easy maintenance.

Maintenance of Bearings

Bearing lubrication and care

and premature failure.
ATEX classification of the equipment. Failure to follow these procedures will void the ATEX
classification for the equipment.
If the equipment is ATEX certified and the listed temperature exceeds the applicable value
shown in Table 1 under ATEX identification, then that temperature is not valid. Should this
situation occur, please consult with your ITT/Goulds representative.
CAUTION:
pump seizure.

Oil lubrication

When the pump is furnished with oil lubrication, a good grade of oil should be used to ensure
long bearing life.
NOTICE: Pumps furnished for oil lubrication are shipped without oil. Add oil until the level is up
to the oil level line before the unit is started.
If too much oil is added, there will be excessive heat generated in the bearings and there may
be leakage from the shaft seals. We recommend a commercial oil such as Mobil D.T.E. oil,
B.B., Tellus 41 or equal. However, a good grade of #30 or #40 weight is satisfactory for normal
temperatures.
For best results, the weight of the oil lubricant should be adjusted for the normal operating
temperature as follows:
To 60°C | 150ºF
To 71°C | 160ºF
20
after tightening.
turning the outboard jam nut.
lubrication.
casing liners. Adjust impeller clearance.
side casing liner.
Bearings must be lubricated properly in order to prevent excess heat generation, sparks,
The Preventive Maintenance section must be adhered to in order to keep the applicable
Throughout this section on bearing lubrication, different pumpage temperatures are listed.
Operation of the unit without proper lubrication will cause bearing failure, and
SAE 20
SAE 30
Model JC Installation, Operation and Maintenance Instructions