4) Are the both suction pipe and pump filled up with pumping liquid or the discharge valve fully opened in the
pump running ?
5) Is the bearing temperature normal ? ( no abnormal temperature rise ? )
6) Is leakage from the gland proper ?
7) Is the pump running with no abnormal noise and no vibration ?
2. 3. 2. Shaft Seal
The shaft seal is available in two different types of gland packing and mechanical seal. The descriptions here
under covers the gland packing seal type. Refer to Chapter IV for the detailed instructions of the mechanical seal.
The gland packing insertion space in the casing cover is designed to be equivalent to either five packing rings
(4610) or three packing rings plus one lantern ring ( 4580 ).
2. 3. 2. Dimensions of stuffing box compartment and no. of packing ring
3. Dismantling and Reassembling
3. 1. General
Before overhauling, be sure to check that the pump is in absolutely unsuitable condition.
In addition, check without fail that the both suction and discharge line sluice valves keep full-close position, the
pump casing is normal in its temperature and no pressure is loaded to the pump casing ( that is, the casing is empty ).
When overhauling, maximum possible effort must be made to avoid accidental trouble. Also, good care must be
exercised to protect the pump components/parts from impact and flaw in handling of them.
3. 2. Dismantling
For dismantling the pump, follow the disassembling sequence given below with reference to 3. 6 " Exploded
View ”and parts names listed therein.
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