Gorman-Rupp Pumps 86A2-F4L 1322538 and up - Manual (Page 29)

OM-00957 80 SERIES
MAINTENANCE & REPAIR PAGE E - 9
ate. Replace the gasket set as required. For ease of
reassembly, tie and tag the gaskets or measure
and record their thickness.
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.
Inspect the wear plate (38), and replace if scored or
worn. To remove the wear plate, disengage the
hardware (40 and 41) from the wear plate studs,
and pull the wear plate from the pump casing.
Impeller Removal
(Figure 2)
Before removing the impeller, turn the cross arm on
the automatic lubricating grease cup (18) clock­
wise until it rests against the cover (see Figure 5 in
LUBRICATION). This will prevent the grease in the
cup from escaping when the impeller is removed.
Use an impeller wrench to remove the impeller (2).
If an impeller wrench is not available, place a block
of wood against one of the vanes, and strike it
sharply with a hammer. Be careful not to damage
the vane. Unscrew the impeller in a counterclock­
wise direction (when facing the impeller). Use cau­
tion when removing the impeller; tension on the
seal spring will be released as the impeller is un­
screwed.
Inspect the impeller and replace it if cracked or
badly worn. Slide the impeller adjusting shims (13)
off the shaft. For ease of reassembly, tie and tag the
shims or measure and record their thickness.
Seal Removal
(Figure 2)
Make certain that the cross arm on the grease cup
has been turned down against the cover before re­
moving the seal assembly.
For ease of disassembly, the seal and seal plate
(36) may be removed as a single unit. Before at­
tempting to remove the seal plate, remove the au­
tomatic grease cup and piping (16, 17 and 18).
Slide the seal washer (15) off the shaft. Remove the
outer rotating element. Slide the seal plate, spacer
sleeve, and remaining seal parts off the shaft as a
unit.
Carefully remove the spacer sleeve, outer station­
ary seat, rotating element, packing ring and seal
spring from the seal plate. Remove the inner seal
washer, packing ring, stationary seat and rotating
element.
Inspect the seal liner (14) for wear or grooves that
could cause leakage or damage to the seal pack­
ing rings. The seal liner is secured by a press fit into
the seal plate and does not normally require re­
placement. If replacement is required, see Seal In­
stallation.
If no further disassembly is required, refer to Seal
Installation.
Shaft and Bearing Removal and Disassembly
(Figure 2)
When the pump is properly operated and main­
tained, the intermediate should not require disas­
sembly. Disassemble the shaft and bearings only
when there is evidence of wear or damage.
Shaft and bearing disassembly in the field
is not recommended. These operations
should be performed only in a properly‐
equipped shop by qualified personnel.
Disengage the hardware (22 and 23), and remove
the bearing cap (28) and shims (30). Tie and tag
the bearing shims, or measure and record their
thickness for ease of reassembly.
Place a block of wood against the impeller end of
the shaft (25), and tap the shaft and assembled
bearings from the intermediate. Be careful not to
damage the shaft.
NOTE
There are no provisions for draining the grease