Assembling The Pump; Mechanical Seal; Impeller - Johnson Pump SPX Flow CombiLine Series Instruction Manual

7.9
7.9.1
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7.9.2
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Assembling the pump

The item numbers used refer to the parts lists and drawings of chapter 9 "Parts".

Mechanical seal

A mechanical seal is a vulnerable precision part. Leave the mechanical seal
inside its original packaging until you mount it. Make sure the work site is free
from dust and that the parts and tools are clean. Remove possible paint on
parts. Never put the sliding rings down on the sliding surfaces.
1 If applicable screw the studs (0950) into the lantern piece (0110).
2 Grease the seat of the static ring of the mechanical seal with Molycote 111.
3 Place the lantern piece (0110) flat on the work surface and press the static ring
(1220-A) of the mechanical seal inside. If necessary use a plastic pressure piece.
DO NOT hammer the ring inside!
4 Fit the lantern piece to the electric motor and proceed with mounting the mechanical
seal.
Be careful not to damage the centring rim of the motor flange.
If the pump is not fixed straight to the lantern piece the bearings and
mechanical seal will be damaged.
5 For pumps provided with a shaft sleeve: Grease the shaft with Molycote 111 and
mount the shaft sleeve (1200) onto the shaft end.
6 Put some soap suds on the bellows and slide the rotating part of the mechanical seal
(1220-B) onto the shaft sleeve or the shaft, until the seal faces of the two seal
components just touch each other.
At that moment, stop pushing the bellows against the spring tension! After the
impeller has been mounted, the mechanical seal will be at the right pre-load.

Impeller

1 Place the key (1860) in the key way of the shaft.
2 For pumps provided with shaft sleeve and for CL 4/4 and CL 5/4: Grease the
impeller hub and the O-ring seat with Molycote 111 and mount the O-ring (1320).
3 Mount the impeller (0120) onto the shaft. The impeller will compress the bellows of
the mechanical seal, giving it the correct pre-load.
4 Put a drop of Loctite 243 on the thread of the cap nut (1820) and fit it onto the shaft.
CL 4/4 and CL 5/4: First place the washer (1825).
Apply the Loctite only on the thread of the cap nut and not on other parts! It
might run in between the shaft and the impeller hub and in that case the
impeller will get stuck on the shaft!
Disassembly and assembly
CL-CBH/EN (1901) 7.6