Banjo 301PIH13W User manual

3" Cast Iron Wet Seal
301 Series Pump
Instruction Manual
301PIH13W, 301PBIW,
301POIW
Read these instructions and the instructions covering the operation of the pump drive unit. Do not
operate the gas engine (if so equipped) until you have put oil in the engine. Do not operate the wet
seal pump until you have lled the wet seal reservoir ¾ full (the seal assembly should be
submerged) with a 50% ethylene glycol (anti-freeze) and 50% water mixture.
Check the coolant mixture level in the wet seal reservoir after every 5 hours of use, ll reservoir as
necessary. Check oil level in the gas engine (if so equipped) after every 5 hours of use, ll reservoir
as necessary. Change coolant mixture in reservoir after every 100 hours of use or annually, which
ever comes rst.
Always ll the pump body with the liquid to be pumped before starting pump. It is not necessary to
drain the pump body after use, unless there is a danger of freezing.
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 capacity 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”.
There are important instructions regarding preparing the engine for long periods without use. (Read
the engine instruction manual). Under these conditions, drain the pump and wet seal. Rell wet seal
with fresh coolant mixture and reinstall ll and drain plugs. Leave all plugs (lter and drain) out of the
pump. Always try to store the unit in a heated and dry building.
When pumping dirty water or other liquids containing solids, always use a pump strainer on the end
of the suction line. There are no points on the pump which need lubrication. The wet seal assembly is
cooled and lubricated by the ethylene glycol/water mixture.

Disassembly Instructions:
1. Drain all uids from the pump. Remove the
drain plug (18003) from the lower front of the
pump housing to drain the pump. Remove ll
plug (18205) from top of reservoir. Remove
drain plug (17032) from lower side of reservoir.
2. Using a 9/16" socket or wrench, remove the
impeller clamp assembly (18129) from the
pump.
3. Remove drive unit from the pump. This is done
by using a 9/16" wrench to remove the four
3/8" bolts (17704) that hold the drive unit to the
wet seal reservoir adapter (18203A). Once the
bolts are removed, separate the drive unit from
the pump.
4. Remove wet seal assembly from pump
housing. This is done by removing the six 3/8"
nuts (V20019) and 3/8" lock washers (V20018)
from the wet seal reservoir adapter (18203A).
The wet seal assembly can then be pried away
from the pump housing and removed. Remove
the handle (18033) from the wet seal adapter.
1

2
Disassembly Instructions:
5. Remove impeller (18206) from the wet seal
assembly by pushing the wet seal shaft (18206)
from the back of the assembly.
6. Remove cover plate (18202A) from the wet seal
assembly. It may be necessary to pry the
cover plate away from the reservoir by using the
pry tabs located on the cover plate.
7. Remove the seal assembly (15035) from the
wet seal assembly at this time.
8. Inspect the wear plate (18004) and replace or
repair as necessary.
9. The inlet (18012) and outlet (18008) anges
and gaskets (18013, 18009) can be inspected
and replaced as necessary.

Assembly Instructions:
Clean all parts being reused in parts washing
solvent before reassembly. Remove all remnants
of old gaskets. Rinse and clean pump of all residue
from liquids previously pumped. It may also be
necessary to sandblast corroded components to
remove rust from mating surfaces.
1. Install inlet (18012) and outlet (18008) anges
with new gaskets (18009 & 18013) as necessary.
2. Replace wear plate (18004) as necessary. It is
highly recommended that the wear plate bolts be
secured with Loctite 241 (blue). Securing the
bolts in this fashion will not allow the bolts to
vibrate loose during pump operation.
3. Install the ceramic/viton seal halves (15035) into
the reservoir (18203A) and cover plate (18202A).
Lubricate the O. D. of the viton seal with
petroleum jelly and install the seal halves into
the bores of the respective components by using
a slight pressure with your thumbs. DO NOT
STRIKE THE SEAL HALVES AT ANY TIME,
OTHERWISE SEAL FAILURE WILL OCCUR.
4. A shim is used to set the clearance between the
impeller and wear plate. Any shim with a
thickness of .030/.040 can be used. An ideal shim
is 1/2" wide piece of No. 21 gauge sheet metal.
3

Assembly Instructions:
5. Install gaskets to front and back of cover plate
and install cover plate on the pump housing.
6. Install seal spring assembly on the impeller
shaft. Lubricate the shaft and viton portion of
the seal with petroleum jelly. Slide onto shaft
using your thumbs.
7. Mate the reservoir adapter (18203A) with the
cover plate (18202A). This is done by sliding
the reservoir over the shaft and onto the cover
plate. Align the bolt patterns of the two parts,
also align the components such that the ll plug
hole of the reservoir is facing up.
8. Install six 3/8 lock washers (V20018) and 3/8"
nuts (V20019) onto the six wet seal housing
studs and tighten.
4

Assembly Instructions:
9. Mate the wet seal and pump assembly to the
drive unit. Insert the shaft of the drive unit into
the wet seal shaft. Install four 3/8" bolts (17704)
with lock washers (V20018) through the wet
seal adapter and into the drive unit.
10. Install the impeller shaft clamp (18129) over
the serrated tines of the wet seal shaft.
Lubricate the clamp bolts with anti-seize thread
lubricant and tighten to 40 ft.lb. minimum. It
may be necessary to further tighten the clamp
depending upon drive unit size and pump load
during operation.
11. Fill the reservoir ¾ full with a 50% water &
50% ethylene glycol (anti-freeze) mix. The uid
level should cover the top of the seal
assembly. Install the ¾" ll plug (18205) using
a thread sealant.
12. Remove the shim from the pump.
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ITEM PART NO. DESCRIPTION
118001 3" Pump Housing
2 18106 3/8"- 16 x 1¼ FHSCS
3 18003 Drain Plug
4 18013 Check Valve Gasket
518008 Flange-Outlet 3"
6 18012 Flange-Inlet 3"
7 18002 1" NPT Plug
8 18004 Plate-Wear
9 18009 Gasket-Outlet
10 V20018 3/8"Lockwasher
11 V20019 3/8 " Hex Nut
12 18021 Adapter Gasket
13 18129 Keyed Clamp
14 12910 Pump Decal
15 18200A Wet Seal Reservoir
16 17704 3/8"- 16 x 1¼ HHCS
17 18033 Handle
18 18034 Handle Nut
19 18500 Bearing Pedestal
20 18010SS 3/8- 16 x 11/8" HHCS
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150 Banjo Drive ℡ 765-362-7367 ℻ 765-362-0744
Crawfordsville, IN 47933 ℻ 800-458-0232 [email protected] www.banjocorp.com
301PIH13W FLOW DATA
0
10
20
30
40
50
60
70
350 300 280 200 15090210
FLOW (GPM)
0
20
40
60
80
100
120
140
160
PRESSURE (PSI)
HEAD (FT)