Gorman-Rupp Pumps 04B3-F4L 1316966 and up - Manual (Page 27)

OM-01216 0 SERIES
MAINTENANCE & REPAIR PAGE E - 7
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, 2 and 3) and the
accompanying parts lists.
This manual will alert personnel to known proce­
dures which require special attention, to those
which could damage equipment, and to those
which could be dangerous to personnel. However,
this manual cannot possibly anticipate and provide
detailed precautions for every situation that might
occur during maintenance of the unit. Therefore, it
is the responsibility of the owner/maintenance per­
sonnel to ensure that only safe, established main­
tenance procedures are used, and that any proce­
dures not addressed in this manual are performed
only after establishing that neither personal safety
nor pump integrity are compromised by such prac­
tices.
Before attempting to service the pump, switch off
the engine ignition and disconnect the positive bat­
tery cable to ensure that the pump will remain inop­
erative. Close all valves in the suction and dis­
charge lines.
For engine disassembly and repair, consult the lit­
erature supplied with the engine, or contact your
local engine representative.
Before attempting to open or service the
pump:
1. Familiarize yourself with this man­
ual.
2. Switch off the engine ignition and
disconnect the positive battery
cable 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.
Pump Disassembly
(Figure 2)
Before attempting to service the pump, remove the
pump casing drain plug (34) and drain the pump.
Clean and reinstall the drain plug.
To service the wear ring (7), impeller (2), seal as­
sembly (3), or seal plate (29), the pump casing (1)
must be separated from the base and intermediate
(25).
Remove the suction and discharge lines. See Fig­
ure 1, and remove the hardware (45, 46 and 47) se­
curing the casing to the base (44). Remove the
nuts (28) and use a suitable hoist and sling to sepa­
rate the pump casing and gasket (30) from the seal
plate and intermediate.
Use lifting and moving equipment in
good repair and with adequate capacity
to prevent injuries to personnel or dam­
age to equipment. Suction and dis­
charge hoses and piping must be re­
moved from the pump before lifting.
Tie and tag any leveling shims used under the cas­
ing feet to ease reassembly.
Inspect the wear ring (7) for excessive wear or
scoring. The wear ring is secured in the pump cas­
ing by a press fit. If replacement is required, use a
small bit to drill two holes through the ring horizon­
tally, 180
_ apart. Use a saw or chisel to complete
the cuts through the ring, and remove it from the
pump casing. Use caution not to damage the
pump casing bore when removing the wear ring.