Gorman-Rupp Pumps 04E1-GA 1171927 and up - Manual (Page 28)

0 SERIES OM−03745
MAINTENANCE & REPAIR PAGE E − 8
5 _ TAPER
(APPROX.)
SLEEVE
1.00 D
1.44
FINISH ALL OVER TO
BE 50 RMS OR LESS ENDS TO BE SQUARE
AND PARALLEL
36,6 mm
25,4 mm
IMPELLER
SHAFT
SEAL
AREA
KEYWAY
1.25 D
31,8 mm
SLEEVE DIMENSIONS SLEEVE INSTALLED
Figure 3. Seal Installation Sleeve
Lubricate the tapered sleeve and position it on the
shaft. Position the rotating portion of the seal (con-
sisting of the retainer, bellows and rotating ele-
ment) on the sleeve, and apply even pressure
against the shoulder of the seal retainer until the ro-
tating subassembly slides onto the shaft and the
seal faces contact. A push tube cut from a piece of
plastic tubing would aid this installation. The I.D. of
the tube should be approximately the same diame-
ter as the I.D. of the seal spring.
Remove the tapered sleeve and install the seal
spring. Make sure that all components of the seal
are seated squarely.
Impeller And Pump Casing Wear Ring
Installation
(Figures 1 and 4)
Inspect the impeller (2), and replace it if cracked or
badly worn.
For maximum pump efficiency, the impeller must
be centered within the volute scroll. To verify impel-
ler positioning, measure the pump casing and im-
peller as shown in Figure 4. Use these measure-
ments to calculate the required impeller location
(dimension E). Add or remove impeller adjusting
shims (22) to obtain dimension E.
D
B
2
A B
2
C D
E
Step 2 Step 1 Step 3
A+
B
2
C+
D
2
E = −
Figure 4. Centering Impeller Within Pump Casing
With the correct thickness of impeller adjusting
shims installed, apply ‘Loctite Primer Grade T’, fol-
lowed by ‘Loctite Retaining Compound No. 242’ to the keyway, impeller key (47) and shaft threads
(use no substitutes).