L group (figs. 38-41), Caution – Goulds Pumps 3420 - IOM User Manual

Page 53

L Group (Figs. 38-41)

Oil Lubrication: Loosen the set screw (363B) in the
dust cover (139) on the coupling end and slide it
towards the coupling.

Grease Lubrication: Slide the deflector (123A) on the
coupling end toward the coupling.

Remove the bearing cap hex nuts (425A) and the
bearing cap (111A). Match-mark each bearing cap.
They must be replaced on the same end and in the
same position on the pump during reassembly.

CAUTION

Failure to reassemble the pump with the bearing caps
in the correct position could result in damage to the
pump.

NOTE: The casing and the bearing caps are machined
as a matched set.

Place the sling in position, refer to Fig. 33 (p. 43).
Adjust the sling tension to take weight off of the
rotating element. Make sure all stationary parts of the
rotating element are loose before the rotating element
is removed. It is desirable to rotate the casing wearing
rings (127) , stuffing box bushings (125), and the
bearing housings (134 and 134A) 180

° to disengage

the tongue and groove locks.

Remove the element and place it on padded supports.

Slide the casing rings off the rotating element.

Scribe the coupling position on the shaft (item 122)
and remove the coupling and the coupling key (400).

Oil Lubrication: Slide the dust cover (139) off of the
coupling end of the shaft.

Grease Lubrication: Slide the deflector (123A) off of
the coupling end of the shaft.

Unbolt and remove both bearing end covers (109A
and 119A).

Oil Lubrication: Remove the oil rings (114) and the
oil ring housings (515).

10. Straighten the tangs in the lockwashers (382) and

remove both bearing locknuts (136) and lockwashers.

11. Oil Lubrication: Slide the oil ring sleeves (324 and

323) off of the shaft (122).

Grease Lubrication: Remove the grease shield (346A)
and the oil ring sleeves (207 and 208).