Gorman-Rupp Pumps 82D-GX160 987917 and up - Manual (Page 25)

OM−03790 80 SERIES
MAINTENANCE & REPAIR PAGE E − 7
Tie and tag any leveling shims used under the cas-
ing mounting feet to ease reassembly.
Inspect the wear plate (16) and replace if badly
scored or worn. To remove the wear plate, disen-
gage the hardware (17, 18, 20 and 21) and pull the
wear plate from the pump casing.
Impeller Removal
(Figure 2)
Before removing the impeller, turn the cross arm on
the automatic grease cup (10) 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 and piping (9 and
10).
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 (4)
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 (11 and 12) 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 and piping from the
intermediate, and use a suitably sized dowel to
press the seal components from the intermediate.
Inspect the seal liner (7) for wear or grooves which
could cause leakage or damage to the seal pack-
ing rings. The seal liner is a press fit in the interme-
diate and does not normally require replacement. If
replacement is necessary, 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 (7) for wear or grooves which might cause
leakage or damage to the seal packing rings. If the
seal liner requires replacement, remove the inter-
mediate as described in Seal Removal And Dis-
assembly, 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, drill a
1/4-inch (6,4 mm) diameter hole through it to per-
mit 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-
shaft will have to be replaced (refer to the engine
service manual).
Position the intermediate against the engine, and
secure it with the attaching hardware (11 and 12).
Clean the seal cavity and shaft with a cloth soaked
in fresh cleaning solvent.
Most cleaning solvents are toxic and
flammable. Use them only in a well-ven-
tilated area free from excessive heat,