Banjo 300PH-6 User manual

SELF-PRIMING POLY CENTRIFUGAL PUMPS
INSTRUCTION MANUAL
BANJO CORPORATION | A Unit of IDEX Corporation
150 Banjo Drive, Crawfordsville, IN 47933 U.S.A.
banjocorp.com | Telephone: [phone]
BANJOCORP.COM
1½″, 2″ & 3″ PUMPS

CONNECT WITH CONFIDENCE™2
OPERATION WARNING
Do not operate the gas engine (if so equipped)
until you have put oil in the engine. Do not run
the pump dry. Serious damage to the mechanical
seal or complete failure of the mechanical seal can
result from running the pump dry. Always ll the
pump with water or the uid being pumped before
starting the drive unit.
WARNING! DO NOT USE WITH
FLAMMABLE LIQUIDS.
Do not use ammable liquids. This pump is not
designed or produced to pump ammable liquids of
any kind. Failure to follow this warning can result in
explosion, serious bodily injury or death.
OVERVIEW
Read these instructions and the instructions covering operation of the pump drive unit.
The gas engine (if so equipped) is shipped with no oil. Consult your owners manual for specic oil recommendations,
maintenance procedures, schedules, and troubleshooting. The maximum angle of operation for gas engine drive units is
25° in all directions. For engine warranty service contact your local engine dealer.
Make certain that all hose and pipe connections are air tight. An air leak in the suction line may prevent priming and will
reduce the performance of the pump.
Always place the pump as close to the liquid to be pumped as possible. Keep the suction line short and with few bends.
Keep the pump and engine on a level foundation. A poor foundation and a heavy suction hose (made heavier when
“primed” full of liquid) could result in a pump “down the hole”. It is not necessary to drain the pump body after use, unless
there is a danger of freezing.
There are no points on the pump that need lubrication. The pump seal is cooled and lubricated by the uid being pumped.
When pumping dirty water or liquids containing solids, always use a pump strainer on the end of the suction line. Note:
Engine warranty service available at authorized Briggs & Stratton
®
and Honda
®
dealers.
WARNINGS
STORAGE WARNING
There are important instructions regarding the
preparation of the engine for long periods without
use, (reference the engine instruction manual).
Before long periods of storage, the pump should
be ushed with clean water and drained. Leave all
plugs (ll and drain) out of the pump. Always store
the pump unit in a heated and dry building.

CONNECT WITH CONFIDENCE™3
1½″, 2″& 3″POLY PUMPS
120
110
100
90
80
70
60
50
40
30
20
10
0
50
45
40
35
30
25
20
15
10
5
0
PSI FT
0 25 50 75 100 125 150 175 200 225 250 275 300 325 350
FLOW (GPM)
TOTAL HEAD
140
130
60
55
Head (FT) 011233446576980
Pressure (PSI) 0510 15 20 25 30 35
Flow (GPM) 325 300 280 235 190 150 90 20
Note: Curve based on water and pump spinning at 3450 RPM
PERFORMANCE CHART @ 3450 RPM
Head (FT) 0112334465769
Pressure (PSI) 0510 15 20 25 30
Flow (GPM) 300 285 240 190 145 85 15
Note: Curve based on water and pump spinning at 3450 RPM
PERFORMANCE CHART @ 3450 RPM
Head flow curve for
the following:
300PO 300P6PRO
300PH-6
300PB
PERFORMANCE
120
110
100
90
80
70
60
50
40
30
20
10
0
50
45
40
35
30
25
20
15
10
5
0
PSI FT
0 25 50 75 100 125 150 175 200 225 250 275 300 325 350
FLOW (GPM)
TOTAL HEAD
140
130
60
55
Head (FT) 011233446576980
Pressure (PSI) 0510 15 20 25 30 35
Flow (GPM) 325 300 280 235 190 150 90 20
Note: Curve based on water and pump spinning at 3450 RPM
PERFORMANCE CHART @ 3450 RPM
Head (FT) 0112334465769
Pressure (PSI) 0510 15 20 25 30
Flow (GPM) 300 285 240 190 145 85 15
Note: Curve based on water and pump spinning at 3450 RPM
PERFORMANCE CHART @ 3450 RPM
Head flow curve for
the following:
300PO 300P6PRO
300PH-6
300PB
120
110
100
90
80
70
60
50
40
30
20
10
0
50
45
40
35
30
25
20
15
10
5
0
PSI FT
0 25 50 75 100 125 150 175 200 225 250 275 300 325 350
FLOW (GPM)
TOTAL HEAD
140
130
60
55
Head (FT) 011233446576980
Pressure (PSI) 0510 15 20 25 30 35
Flow (GPM) 325 300 280 235 190 150 90 20
Note: Curve based on water and pump spinning at 3450 RPM
PERFORMANCE CHART @ 3450 RPM
Head (FT) 0112334465769
Pressure (PSI) 0510 15 20 25 30
Flow (GPM) 300 285 240 190 145 85 15
Note: Curve based on water and pump spinning at 3450 RPM
PERFORMANCE CHART @ 3450 RPM
Head flow curve for
the following:
300PO 300P6PRO
300PH-6
300PB
1½″ Port Size
Suction...............................1½″ NPT
Discharge ..........................1½″ NPT
2″ Port Size
Suction..................................2″ NPT
Discharge .............................2″ NPT
3″ Port Size
Suction..................................3″ NPT
Discharge .............................3″ NPT
PERFORMANCE CHART @3450
PERFORMANCE CHART @3450
PERFORMANCE CHART @3450
PERFORMANCE CHART @3450
PERFORMANCE CHART @3450
PERFORMANCE CHART @3450
PERFORMANCE CHART @3450
PERFORMANCE CHART @3450
PERFORMANCE CHART @3450
PERFORMANCE CHART @3450
PERFORMANCE CHART @3450
PERFORMANCE CHART @3450

CONNECT WITH CONFIDENCE™4
DISASSEMBLY INSTRUCTIONS:
Remove the 10 body screws (12720), lock washers (V07018) and
nuts (V07019) from the pump assembly. Remove the body from the
pump assembly.
Remove the check valve (12705) from the volute (12702A/13702).
2A1
Remove the check valve (12705) from the volute (13702). Remove
the one upper volute screw (12900) and the two smaller volute
screws (12725) from the volute. Remove the volute from the
remaining pump assembly.
2B
Remove the impeller bolt (12765A) from the
impeller (12771A/12772). Remove the impeller bolt gasket
(12774VA) from the impeller.
3
4A: Screw the supplied 7/16-14 hex head cap screw into the
impeller snout. As the bolt is tightened the impeller will be pried off
of the shaft of the drive unit. Remove the 7/16-14 screw once the
impeller has been removed from the drive unit. 4B: If the pump im-
peller is going to be reused the ceramic seal half (12713) should be
removed from the impeller at this time. The impeller key (12902A)
located behind the ceramic seal half should be replaced at this time
also.
Remove the four bracket screws (12715A), rear bracket washers
(12901), and screw head O-rings (12717) from the rear bracket using
a ½″ socket. With the four bracket screws removed, the rear bracket
can now be removed from the drive unit.
4A 4B 5

CONNECT WITH CONFIDENCE™5
Remove carbon seal half from rear bracket with a round object. Tap
gently with a hammer. Take care not to crack seal if reusing. Once
disassembled; clean all reusable parts thoroughly, removing any
traces of old gasket material and trapped / dried liquids from pump.
DISASSEMBLY INSTRUCTIONS:
At this time, it may be necessary to polish the drive unit shaft to
remove any corrosion that may have formed.
76
Install the pump slinger (12706) on to the drive unit shaft. The
slinger should be slid all the way back on the shaft of the drive unit
so that the slinger covers the step on the drive unit shaft as shown.
Place the seal O-ring (12710) behind the lip of the carbon seal half.
21
ASSEMBLY INSTRUCTIONS:
To install the carbon seal (12713) half into the rear bracket use a
tool such as a 1 ½″ pipe nipple or arbor press to give even pres-
sure on the metal ange of the seal housing during installation.
Gently press the seal into position until it bottoms.
Clean the threads of the bracket screws (12715A) thoroughly. Once
clean, install the four at washers (12901) and four screw head
O-rings (12717) onto each of the bracket screws.
43

CONNECT WITH CONFIDENCE™6
ASSEMBLY INSTRUCTIONS:
Install the rear bracket onto the drive unit using the bracket screw
assemblies from the previous step. The handle of the rear bracket
should be to the top of the drive unit. Tighten the screws securely.
65
Place the impeller key (12902A) in the slot located inside the impeller
snout. The impeller (12771A/12772/13772) is now ready to be slid
onto the drive unit shaft.
7
Secure the impeller to the drive unit shaft with the impeller bolt
gasket (12774VA) and impeller bolt (12765A). Tighten the impeller
bolt until snug.
8
Install the O-ring segment (12754) onto the rear bracket as shown.
910
Install volute (12702A/13702) onto rear bracket using the three volute
screws (12900/12725). Install check valve (12705) onto the snout of
the volute. Drive unit should be turned over a few times to check for
clearance between the two. A small amount of drag between impeller
and volute is ok, however, if the drive unit will not turn over because
of the lack of clearance, a bracket shim may have to be used.
Verify impeller hex nut (12775A) is located at the bottom of impeller
snout (should be installed). A very light press t may be required to
install nut into cavity. Install the ceramic seal half into hub of impeller
by using an arbor press or similar tool. Outside diameter of rubber
boot may be sparingly coated with silicone to ease installation.

© Copyright 2018 Banjo Corporation. All Rights Reserved.
BJO_MAN_KK-52_1.5_2_3InchPolyPumpManual_Rev1118
BANJO CORPORATION
A Unit of IDEX Corporation
150 Banjo Drive
Crawfordsville, IN 47933 U.S.A.
Telephone: [phone]
Tech Sales: [phone]
Fax: [phone]
banjocorp.com
#yellowhandle
Please see banjocorp.com for more information
ASSEMBLY INSTRUCTIONS:
Place the pump body O-ring (12719A) around the outside ange
of the rear bracket. The O-ring may be sparingly lubricated with
silicone to ease installation of the pump body in the next step.
11
Install the pump body (12712/13712) as shown below with the
outlet ange facing up. Install the 10 body screws (12720), 10 lock
washers (V07018), and 10 nuts (V07019) to secure the pump body
to the rear bracket. Tighten the bolts securely all the way around.
12