Goulds Pumps 3996 - IOM - Manual (Page 39)

INSPECTION AND REPLACEMENT
1. Impeller (101) – Replace if impeller shows excessive
erosion (especially on ejector vanes on back side of
impeller), corrosion, extreme wear or vane breakage.
O-ring groove and impeller hub must be in good
condition. Check impeller balance.
2. Shaft (122) – Check for runout to see that shaft has
not been bent. On pumps without shaft sleeves, shaft
surface in stuffing box area must be smooth and free
of grooves. Bearing seats and oil seal areas must be
smooth and free of scratches or grooves. Shaft
threads must be in good condition. Replace shaft if
necessary.
3. Shaft Sleeve (126) – Surface in stuffing box must be
smooth and free of grooves. If grooved, replace.
4. Mechanical Seal (383) – Seal faces, gaskets, and
shaft sealing members must be in perfect condition or
excessive leakage may result. Replace worn or
damaged parts.
5. Ball bearings (112 and 168) – Replace if worn,
loose or rough and noisy when rotated. New
bearings should not be unwrapped until ready for use.
Replacement bearings must be of the proper size and
type as specified in the Construction Details (Section
VI). Where possible, avoid reusing bearings that
have been pulled.
6. Grease Seals (332 and 333) – Replace if torn or
otherwise damaged. For seal sizes, see Vendor
Identification Number table below.
Seals are held by press fit. Lips on seals should face
outward (away from bearings).
7. General – All parts should be clean before assembly.
This is especially important at retaining ring and
O-ring grooves, threads, lock fits, gasket surfaces and
breaing and bearing lubricated areas. Any burrs
should be removed with crocus cloth.
3996 IOM 9/2010
35
VENDOR IDENTIFICATION NUMBER
Seal Chicago
Rawhide
Crane Garlock Johns-
Mansville
Nat'l Victor
ST
Inboard 13541 9080LPD 330663 6444BK3
Outboard 8626 137-187-8 76x6133 63647K5
STD 92x6133
MT
Inboard - 175-287-12 63X922 - - 63333
STD 65X922
Outboard - 112-200-8 - 64324K3
STD - -
6