Pump Repair - SHURflo R30GN Operating Instructions Manual

SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
SHURflo Bronze Pedestal Self-Priming
Flexible Impeller Pumps
Maintenance (Continued)
retaining ring (Ref. No. 17) to snap
into the groove on the shaft (Ref.
No. 18) (See Figure 4).
g. Press the woodruff key (Ref. No. 9)
into the key way in the shaft (Ref.
No. 18) using soft-jaw pliers or a soft
vise (See Figure 4).
Be careful not to
bump woodruff key
against the stainless steel shaft.
h. Place a new small gasket (Ref. No.
13) onto the bearing housing (Ref.
No. 14).
i. Assemble the complete shaft, bear-
ing and seal assembly onto the
pump body (Ref. No. 12). Insert the
two long screws and washers (Ref.
Nos. 20 & 22) that secure the bear-
ing housing (Ref. No. 14) to the
pump body (Ref. No. 12) and tighten
(See Figure 3).
j. Lubricate impeller end of shaft with
silicone or soapy water.
k. Place a new impeller (Ref. No. 8)
over the shaft (Ref. No. 18). Align
the key (Ref. No. 9) in the shaft with
the key way in the impeller, and
push the impeller into the pump
body (Ref. No. 12) with a twisting
motion until impeller is inserted into
pump body. Impeller should not be
forced over key and should slide
easily (See Figure 2).
l. Rotate shaft (Ref. No. 18) several
turns in direction of rotation to
position impeller vanes.
m. Attach a new gasket (Ref. No. 5)
over the dowel pins (Ref. No. 1),
then place cover on the gasket and
fasten with screws and lockwashers
(Ref. Nos. 21 & 22) (See Figure 2).
n. All pumps must be primed before
start-up and filled with fluid (See
Figure 3). Never operate a pump unless
it is secured to a solid foundation and
all safety shields are installed.
Form L-4095 (12/09)

PUMP REPAIR

(Procedures for Model R102N - See
Figures 2 and 7)
DISASSEMBLY
Never use petroleum-
based grease or oil
with optional Neoprene impellers.
1a. Remove four screws (Ref. No. 16)
and four lockwashers (Ref. No. 17)
securing cover (Ref. No. 10) to the
body (Ref. No. 4). Pull the cover and
bushing assembly off the drive shaft
(Ref. No. 12) (See Figure 2).
b. Remove and discard the gasket
(Ref. No. 9) (See Figure 2).
c. To remove impeller (Ref. No. 7),
gently grip the vanes on opposite
sides of the impeller with two pair
of pliers. Alternately pull on the
impeller with the pliers or use two
screwdrivers on opposite sides to
pull it out (See Figure 2).
d. Inspect impeller for excessive wear
and/or damage (See Figure 2).
NOTE: The impeller is a common wear
item in this pump and frequent replace-
ment is suggested. Impeller can become
torn, distorted and overheated becom-
ing brittle. When this happens, impeller
blade fragments can come off the
impeller and be pumped downstream
or block pump ports or plumbing.
It is not recommended to flip around a
used/worn impeller for reinstallation.
(See Appendix 1 for illustrations of
common impeller problems.)
e. To remove the cam (Ref. No. 6),
remove the screw (Ref. No. 8) that
goes down through the top of the
body between the intake and dis-
charge ports.
f. Remove the woodruff key (Ref. No.
13), located on the side of the shaft
(Ref. No. 12), by either of the fol-
lowing two methods: place a screw-
driver on the woodruff key and tap
lightly on the woodruff key with a
10
Models R30GN, R50GN and R102N
mallet. Be careful not to damage
the woodruff key. If this does not
work, put the woodruff key in a soft
vise, tighten, then pull up on the
body (See Figure 4).
Do not damage the
shaft.
g. Using a large snap ring pliers,
remove the internal retaining ring
(Ref. No. 1) from the drive end side
of the pump body (Ref. No. 4).
Using a small snap ring pliers,
remove the retaining ring (Ref. No.
3) from the shaft (Ref. No. 12) at the
seal end. The mechanical seal (Ref.
No. 5B) will slide off the shaft (Ref.
No. 12). While supporting the pump
body (Ref. No. 4), pull against the
shaft from the drive end until shaft
and bearing assembly are removed
(See Figure 5).
Figure 5 - Seal Installation and Removal
h. Check the ball bearing (Ref. No. 2)
for leakage or damage. Replace if
necessary.
i. To remove the seal seat assembly
(Ref. No. 5A), push a screwdriver
through the bearing end of pump
body (Ref. No. 4) and against the
rubber or backside of the seal seat.
2a. Inspect drive shaft (Ref. No. 12). If
drive shaft has scratches where
mechanical seal (Ref. No. 5B) is
installed, or if key slots are worn,
replace shaft. If shaft is bent,
replace as well.
Seal
Assembly