Goulds Pumps 3996 Installation, Operation And Maintenance Instructions 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.
Seal
ST
Inboard
Outboard
MT
Inboard
Outboard
3996 IOM 9/2010
VENDOR IDENTIFICATION NUMBER
Chicago Crane
Rawhide
13541
8626 137-187-8
STD
- 175-287-12
STD
- 112-200-8
STD
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.
Garlock Johns-
Mansville
9080LPD
76x6133
92x6133
63X922 -
65X922
-
-
Nat'l Victor
330663 6444BK3
63647K5
- 63333
64324K3
-
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