Gorman-Rupp Pumps 62 1/2A1-GX390 S/2 93740 CA and up - Manual (Page 22)

60 SERIES OM−06223
MAINTENANCE & REPAIR PAGE E − 6
PUMP AND SEAL DISASSEMBLY
AND REASSEMBLY
Review all SAFETY information in Section A.
Follow the instructions on all tags, label and de-
cals attached to the pump.
This pump requires little service due to its rugged,
minimum-maintenance design. However, if it be-
comes necessary to inspect or replace the wearing
parts, follow these instructions which are keyed to
the sectional views (see Figures 1 and 2) and the
accompanying parts lists.
As described on the following pages, this manual
will alert personnel to known procedures which re-
quire special attention, to those which could dam-
age equipment, and to those which could be dan-
gerous to personnel. However, this manual cannot
possibly anticipate and provide detailed precau-
tions for every situation that might occur during
maintenance of the unit. Therefore, it is the respon-
sibility of the owner/maintenance personnel to en-
sure that only safe, established maintenance pro-
cedures are used, and that any procedures not ad-
dressed in this manual are performed only after es-
tablishing that neither personal safety nor pump in-
tegrity are compromised by such practices.
Before attempting to service the pump, remove the
suction and discharge hoses and disconnect the
spark plug wire to ensure that it will remain inopera-
tive. Close all valves in the suction and discharge
lines.
For engine disassembly and repair, consult the lit-
erature supplied with the engine, or contact your
local Honda engine representative.
Before attempting to open or service the
pump:
1. Familiarize yourself with this man-
ual.
2. Disconnect the spark plug wire to
ensure that the pump will remain
inoperative.
3. Allow the pump to completely cool
if overheated.
4. Check the temperature before
opening any covers, plates, or
plugs.
5. Close the suction and discharge
valves.
6. Vent the pump slowly and cau-
tiously.
7. Drain the pump.
Hand Primer Disassembly
(Figure 1 or 2)
Disconnect the hose connection (11) from the
hand primer (3) to the pump sub−assembly.(see
Figure 1) Remove hex head capscrews (25), nuts
(26), and lockwashers (27) securing the hand
primer bracket to the rollover base, and remove the
hand primer (see Figure 2)
If no further pump disassembly is required, refer to
Hand Primer Reassembly.
Pump Disassembly
(Figure 2)
After disconnecting the rubber priming line, re-
move the drain plug (11) to drain the pump. Clean
and reinstall the plug.
Remove the hardware (9) and separate the pump
casing (1) from the intermediate (6). Carefully re-
move the casing gasket set (10) and clean the con-
tacting surfaces.
Inspect the wear ring (12) for severe erosion or
damage. The wear ring is a press fit in the pump
casing. To remove the ring, apply heat to the out-
side of the casing or split the ring. Be careful not to
damage the pump casing.
To remove the impeller (2), insert a steel bar or drift
pin between the vanes and turn it in a counter-
clockwise direction (when facing the impeller)
while holding the engine crankshaft stationary. Be
careful not to damage the impeller vanes. Use
caution when unscrewing the impeller; tension on
the seal spring will be released as the impeller is re-
moved.