Gorman-Rupp Pumps 62 1/2D1-CH23 S/G 1211015 and up - Manual (Page 27)

60 SERIES OM--05171
MAINTENANCE & REPAIR PAGE E -- 10
Impeller Installation
(Figures 2 and 5)
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 5. Use these measure-
ments to calculate the required impeller location
(dimension E). Add or remove impeller adjusting
shims (55) 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 5. Centering Impeller Within Pump Casing
NOTE
After the impeller has been properly positioned,
check for free rotation. Correct any scraping or
binding before further reassembly.
Pump Reassembly
(Figure 2)
If the wear ring (12) was removed, apply ‘Loctite
No. 242 Threadlocker’ or equivalent compound)
between the casing and the wear ring. Position the
replacement ring in the casing bore so that cham-
fer on the I.D. faces toward the impeller. Press the
ring into the bore until fully seated against the cas-
ing shoulder.
NOTE
The wear ring must be fully seated in the casing
bore, otherwise binding and/or excessive wear
could result.
Install the pump casing gasket (10). Carefully
guide the wear ring into the eye of the impeller, and
secure the casing to the intermediate with the nuts
(5).
NOTE
After the pump casing has been install check the
impeller for free rotation. Correct any scraping or
binding before further reassembly.
Exhaust Primer Reassembly
(Figure 3)
NOTE
Before assembly, apply pipe sealant on all
threaded joints.
To install the exhaust primer body (1) screw the
body into the muffler (4). To assemble the exhaust
primer, install the handle (11) and install the various
primer components.
Screw the hose adaptor (8) into the swivel fitting
(7). Install the gas cock valve (10) and pipe nipple
(6).