Gorman-Rupp Pumps 13D-GX270 1421807 and up - Manual (Page 25)

OM−06214 10 SERIES
MAINTENANCE & REPAIR PAGE E − 7
Pump Casing Removal
(Figure 2)
To service the impeller or seal assembly, discon-
nect the discharge piping. See Figure 1 and re-
move the hardware (12, 13 and 14) securing the
pump casing to the base (3).
Support the pump casing (1) using a suitable hoist
and sling, and remove the hardware (20 and 21)
securing the pump casing to the intermediate (18).
Separate the parts by pulling the casing straight
away from the intermediate. If shims have been
used under the mounting feet to level the pump
casing, tie and tag these shims for ease of reas-
sembly.
Remove the intermediate O-ring (24). Clean the
mating surfaces of the intermediate and pump cas-
ing.
Impeller Removal
(Figure 2)
Before removing the impeller, turn the cross arm on
the automatic grease cup (14) clockwise until it rest
against the cover (see Figure 4). This will prevent
the grease from escaping when the impeller is re-
moved. Remove the grease cup.
To loosen the impeller (2), tap the vanes of the im-
peller in a counterclockwise direction (when facing
the impeller) with a block of wood or a soft-faced
mallet. Be careful not to damage the impeller
vanes. Use caution when removing the impeller;
tension on the seal spring will be released as the
impeller is unscrewed.
Inspect the impeller and replace it if cracked or
badly worn. Slide the impeller adjusting shims (9)
off the engine crankshaft. Tie and tag the shims or
measure and record their thickness for ease of
reassembly.
Seal Removal and Disassembly
(Figures 2 and 3)
Carefully remove the outer rotating and stationary
seal elements, packing ring, stationary washer,
seal spring and spacer sleeve from the intermedi-
ate. Use a stiff wire with a hooked end to remove
the inboard stationary washer, packing ring, sta-
tionary and rotating seal elements.
NOTE
An alternate method of removing the seal assembly
is to disengage the hardware (12 and 13) securing
the intermediate to the engine, and slide the inter-
mediate and seal assembly off the shaft as a single
unit. Remove the grease cup (11) from the interme-
diate, and use a suitably sized dowel to press the
seal components from the intermediate.
Inspect the seal liner (15) for wear or grooves
which could cause leakage or damage to the seal
packing rings. The seal liner is a press fit in the in-
termediate and does not normally require replace-
ment. If replacement is necessary, disengage the
hardware (12 and 13) and separate the intermedi-
ate from the engine. See Seal Reassembly And
Installation for seal liner replacement.
If no further disassembly is required, see Seal
Reassembly and Installation.
Seal Reassembly and Installation
(Figures 2 and 3)
Before installing the seal, inspect the bore of the
seal liner (15) for wear or grooves which might
cause leakage or damage to the seal packing
rings. If the seal liner requires replacement, re-
move the intermediate as described in Seal Re-
moval And Disassembly, and position it on the
bed of an arbor (or hydraulic) press. Use a new
sleeve to force the old one out.
After the new liner is properly installed, a 1/4-inch
(6,4 mm) diameter hole must be drilled through it to
permit the flow of lubricant to the seal assembly. Be
careful to center the drill in the threaded grease
piping hole and not damage the threads. Deburr
the hole from the inside of the seal liner after drill-
ing.
Inspect the engine crankshaft for damage. Small
scratches or nicks may be removed with a fine file
or emery cloth. If excessive wear exists, the crank-