Pacer S Series User manual

ASSEMBLY INSTRUCTIONS
for
'S' Series Self-Priming
Centrifugal Pumps

ASSEMBLY INSTRUCTIONS for
'S' Series Self-Priming
Centrifugal Pumps
REFER TO PAGES 5/6 OF THE PUMP OPERATOR'S MANUAL
FOR EXPLODED VIEW PARTS DIAGRAM AND PARTS LIST.
Fig. 1
Fig. 2
Fig. 3
2
Theimpeller(Ref.#15)isnormallysuppliedwith
the mechanical seal (Ref. #14) installed. If you
are installing the seal into the impeller, follow
these steps: Lightly lubricate the sides of the
impellersealseatwithliquidvegetableoil. Press
the seal firmly into the impeller recess making
sure to protect the smooth seal surface. A #0
arbor press with a flat/smooth pressing head
is best for this operation (Fig. 1). If the seal is
tilted, gently remove with a small screwdriver
and re-install.
Thebracket(Ref.#6)isnormallysuppliedwiththe
mechanicalseal(Ref.#13),sealo-ring(Ref.#11)
ando-ringsegment(Ref.#10)installed. Ifyouare
installing,followthesesteps: Lightlylubricatethe
seal o-ring with liquid vegetable oil. Place o-ring
ontotheoutsidediameterofthesealretaineruntil
it rests against the flange of the retainer (Fig. 2)
Press the seal and o-ring into the bracket seal
bore using a #2 arbor press with a recessed
head (inside clearance 1.50"/38mm minimum)
(Fig.3) or a piece of 1½" SCH 80 metal or plastic
pipe, 8"/203mmlong,withminimuminsideclear-
ance 1.50"/38mm, maximum outside diameter
1.90"/48mm. Press only on the flange of the seal
retainer. Pressingonthesealfacewillcauseseal
damage and leakage. Watch for pinched o-rings
which will squeeze out from the seal retainer
flange. Pinching is caused by inadequate o-ring
lubrication.

Procedures:
CAUTION: To prevent accidental starting,
remove the spark plug wire from the plug. Drain
oil and fuel from engine before standing engine
on recoil starter.
1) Stand engine on the recoil starter with shaft
up and bottom of the engine towards the person
assembling the pump (Fig. 4).
2) Checkimpellerkey(Ref.#27)forafree,sliding
fitintheshaftkeyway. Filethekeywayifrequired.
3) Place the pump bracket/seal assembly (ref.
#6,10,11 & 13) onto the engine. Position the
bracketwithitshandletowardthetopoftheengine
(Fig. #5).
Fig. 4
Fig. 5
Fig. 6
Fig. 7 3
4) Installano-ring(Ref.#8)ontoeach1¼"/32mm
long screw (Ref. #9) until the o-ring is seated
against the underside of the screw head. If your
screw tips are not pre-coated with a locking ad-
hesive, apply one large drop of Loctite #242 (or
equivalent) to the tips of the screw threads. Drop
thescrewsintothefourholesofthebracket. With
a large flat head, wide blade screwdriver or 7/16"
socket,tightenthefourscrews. Wesuggest:start-
ing one screw half way, tighten screw opposite
started screw. Return to first screw and tighten.
Tighten remaining two screws (Fig. 6).
5) Check that the o-ring segment (Ref. #10) is
installed in the half moon shaped bracket groove.
If it is loose or not installed, begin at the right side
of the groove, press or roll the o-ring segment
into place (a 1" wallpaper roller works well)
(Fig. 7).

Fig. 8
Fig. 9
Fig. 10
Fig. 11
4
6) Ifbracketscrewplugs (Ref.#12)areprovided,
pressthemintotheholeovereachbracketscrew.
The hole in the plug should face up (Fig. 8). Used
onlyonpumpsdesignedfornon-metallicsolution
contact.
7) Lubricate the seal ring of your impeller with
vegetable oil. Place the impeller completely onto
theshaftbyplacingpressureontotheimpellerhub.
Withfullpressureapplied,slowlyrotatetheimpel-
ler to insure that it does not touch the bracket. If
theimpellertouchesthebracket,addoneormore
impeller shims (Ref. #30) under the impeller hub
untilclearance isobtained. Removetheimpeller,
insert the key into the impeller keyway and slide
the impeller onto the shaft (Fig. 9, 10, & 11).
Note: A small dab of Crisco vegetable shorten-
ing on the key will help hold it in place during
assembly.

Fig. 12
Fig. 13
Fig. 14
Fig. 15
8) Use the fine threaded ¾"/19mm screw (Ref.
#16) to fasten the impeller to the shaft (Fig. 12)
Checkthat asmallo-ring isunderthe screwhead
(Ref.#8). Tighten the screw as much as possible
byhand with a large, flat head, wide blade screw-
driveror7/16"socket. Holdtheimpellerwithyour
free hand to keep the impeller from turning while
tightening the screw.
9) Position the volute (Ref. #17) over the impel-
ler so that the bracket dowels fit the holes in the
volute.Installthetwosmallself-tappingsidevolute
screws (Ref. #18) and the large self-tapping top
volute screw (Ref. #19). Tighten these screws
just enough to pull the volute against the bracket
(Fig. 13). Over tightening these screws can strip
the threads.
10) Place the rubber check valve (Ref. #20) onto
thevolute(Fig.14). Pressfirmlyaroundtheedges
to make certain it is seated.
5
11) Coat the large body o-ring (Ref. #7) with a
thin film of vegetable oil and install onto bracket
flange (Fig. 15). Make sure there is no dirt, lint,
hair, etc. on the o-ring or bracket flange.

Drain
Plug Fill
Plug
Fig. 16
Fig. 17
Fig. 18
6
12) Place the pump body (Ref. #42) onto the
bracket so the discharge opening (large hole on
side of body) is toward the bracket handle (Fig.
#16). Install the ten body screws (Ref. #21). You
will need a 3/8" socket or flat head screwdriver
for the screw head.
13) Tighten the screws in a clockwise rotation
aroundthe pump (Fig.17). Startatthe screw just
to the left of the drain plug (Ref. #23). Tightening
inthissequencehelpspreventpinchingthecheck
valve and body o-ring.
14) Placeo-rings(Ref.#25&22)onthefillerplug
(Ref. #24) and drain plug (Ref. #23).
15) Install the drain plug and filler plug (Fig. 18).
Tightenonlyhandtight.DONOTUSEAWRENCH.
16) Apply the appropriate labels to the pump.
The red, white & black warning label should be
applied on the left side of the pump body. The
pump model number label should be applied on
the right side of the pump body.
17) With pump fully assembled, turn the drive
shaft to insure clearance of impeller between
the bracket and volute face. Should you hear an
internalscrapingnoise,disassemblethepumpto
the impeller. Adjust amount of impeller shims to
correct the problem. Reassemble and check for
clearance one more time.
18) Use Teflon tape when install-
ing threaded fittings or elbows in the
pump discharge and suction. 1½" or 2
fittings - 10-12 wraps of Teflon®tape on the
suctionfittingsandelbow,6wrapsondischarge
nipple. 3" fittings - 15 wraps with ¾" Teflon®
tape on suction, discharge and elbow fittings;
6 wraps on discharge nipple.
DO NOT OVERTIGHTEN. ONE FULL TURN
WITHAWRENCH PASTHAND TIGHTis usually
sufficient to prevent leakage.
19) Afterpumpassembly,refertopumpoperator's
manual for proper operating procedures.

7
Pump to Pedestal Assembly Procedures
A. For pumps assembled to molded plastic pedestal assemblies
(Ref. #55/56).
1. If utilizing the plastic shaft sleeve (Ref. #46) follow procedure #2
found on page 3 of this assembly manual. (If the sleeve is not
preapplied at the factory.
2. For pedestals with carbon steel shafts (58-2053 01), install the
slinger (Ref. #47) as per procedure 3/Fig. 6 on page 3. Do not
install a slinger on pedestal assemblies which have stainless
steel or titanium shaft sleeves.
3. Place your pump bracket assembly onto the pedestal. Position
the bracket with its handle opposite (180°) from the flat, bottom
of the pedestal.
4. Install an o-ring onto each 1½"/38mm long coarse threaded
screw.Apply one large drop of Loctite #242 to the tips of the screw
threads. Drop the screws through the four holes of the bracket
and pedestal. Thread four kep nuts (Ref. #33) onto the screws.
Tighten the screws and nuts using a large flat head screwdriver
and ½" socket wrench.
5. Follow procedures 6-20 to complete your pump assembly.
B. For pumps assembled to cast iron pedestal assemblies (Ref. #48)
1. Do not install a plastic shaft sleeve (Ref. #46) or slinger (Ref. #47)
onto your cast iron pedestal assembly.
2. Place your bracket assembly onto the pedestal. Position the
bracket with its handle opposite (180°) from the flat bottom of
the pedestal.
3. Follow procedures 5-20 to complete your pump assembly.
Bulletin no. 1732-01 7/16