Gorman-Rupp Pumps 13E2-12LD477 S/G 1345995 and up - Manual (Page 28)

10 SERIES OM−05966
MAINTENANCE & REPAIR PAGE E − 10
Remove the cover plate gasket (31) and clean the
mating surfaces.
Pump Casing Removal
(Figure 3)
To service the impeller or seal assembly, discon-
nect the discharge piping. See Figure 1 and re-
move the hardware (13, 14, 15 and 16) securing
the pump casing to the base (3).
Support the pump casing using a suitable hoist
and sling, and remove the nuts (18) securing the
pump casing and grease cup bracket (14) to the in-
termediate (20). 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 reassembly.
Remove the casing gasket set (23). Record the
thickness of the gaskets for future reference. Clean
the mating surfaces of the intermediate and pump
casing.
Impeller Removal
(Figure 3)
Before removing the impeller, turn the cross arm on
the automatic grease cup (13) clockwise until it rest
against the cover (see Figure 6). This will prevent
the grease from escaping when the impeller is re-
moved.
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. Unscrew the impeller and replace it if
cracked or badly worn. Use caution when remov-
ing the impeller; tension on the seal spring will be
released as the impeller is unscrewed.
Slide the impeller adjusting shims off the stub
shaft. Tie and tag the shims or measure and record
their thickness for ease of reassembly.
Seal Removal and Disassembly
(Figures 3 and 5)
To remove the seal assembly (3), remove the
grease cup (13), mounting bracket (14) and piping
(15, 16 and 17) from the intermediate (20).
Carefully remove the outer stationary and rotating
seal elements, packing ring, stationary washer,
seal spring, and spacer sleeve from the intermedi-
ate. Using a pair of stiff wires with hooked ends, re-
move the inboard stationary washer, packing ring
and stationary and rotating seal elements.
NOTE
The seal assembly may also be removed by disen-
gaging the hardware (21 and 22) securing the inter-
mediate (20) to the engine and sliding the interme-
diate and seal assembly off the shaft as a single
unit. Use a suitably sized dowel to press the remain-
ing seal components from the intermediate.
Inspect the seal liner (not shown) in the I.D. of the
intermediate for wear or grooves which could
cause leakage or damage to the seal packing
rings. The seal liner is a press fit in the intermediate
and does not normally require replacement. If re-
placement is necessary, disengage the hardware
(21 and 22) and separate the intermediate from the
engine. For seal liner replacement, see Seal Reas-
sembly and Installation.
If no further disassembly is required, see Seal
Reassembly and Installation.
Seal Reassembly and Installation
(Figures 3 and 5)
Before installing the seal, inspect the bore of the
seal liner (not shown) in the I.D. of the intermediate
(20) for wear or grooves which might cause leak-
age or damage to the seal packing rings. If the seal
liner requires replacement, remove the intermedi-
ate as described in Seal Removal And Disassem-
bly, and position it on the bed of an arbor (or hy-
draulic) 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