moyno A4015A User manual

Section:
METERING/DOSING PUMP
Page: 1 of 5
Date: July 2009
SERVICE MANUAL
METERING/DOSING PUMP
BARE SHAFT
A4015A, A4050A, A4100A, AND A4190A, A2400A, and A4400A MODELS
DESIGN FEATURES
Suction Housing: Stainless steel
Bearing Housing: Cast iron
Pump Rotor: Chrome plated, 300 series stainless steel
Pump Stator: Nitrile, EPDM, Fluoroelastomer
Shaft: 300 series stainless steel
Bearings: Prelubricated, fully sealed ball bearings
Seal: Single or double mechanical seals, packing
Flexible Joint: Prelubricated and sealed
INSTALLATION
Mounting. Provide the proper alignment between the pump
and drive by mounting both to a common flat base. Pump may
be mounted in any position. When mounting vertically, it is
necessary to keep bearings above seals to prevent possible
seal leakage into bearings. Loosen screws on body support
and stator support to rotate pump to desired position.
Pre-Wetting. Prior to connecting pump, wet pump elements
and mechanical seal or packing by adding fluid to be pumped
into suction port. Turn shaft over several times in a clockwise
direction when viewed from the shaft end to work fluid into
pump elements.
Piping. Piping to pump should be self-supporting to avoid
excessive strain on pump housings. The suction port is 1-1/2"
NPT and the discharge port is 1-1/4" NPT. Use pipe “dope” or
tape to facilitate disassembly and to provide seal.
Drive. On belt driven units, adjust belt tension to point of non-
slip. Do not overtighten.
On direct drive units, coupling components should be aligned
and spaced at least 1/16" apart.
– Pump rotation must be clockwise when facing shaft. –
Check direction of rotation before startup.
– Maximum speed is 1750 rpm.
OPERATION
Self-Priming. With wetted pumping elements, the mechanical
seal model pump is capable of 15 feet of suction lift when
operating at 1750 rpm with pipe size equal to port size.
DO NOT RUN DRY. Unit depends on liquid pumped for
lubrication. For proper lubrication, flow rate should be at least
10% of rated capacity.
Storage. Always drain pump for extended storage periods
using pipe plug in suction housing.
Pressure Limits. See Table 1 for maximum discharge
pressure of each model.
Table 1
Max. Pressure 300 PSI, 20 bar
Max. Pressure 300 PSI, 20 bar
Max. Pressure 300 PSI, 20 bar
Max. Pressure 300 PSI, 20 bar
Max. Pressure 175 PSI, 12 bar
Max. Pressure 300 PSI, 20 bar
2400
4190
4100
4050
4015
Models
4400
Temperature Limits. Unit is capable for service at 10°F to
210°F with nitrile, and to 260°F with EPDM, and 350°F with
fluoroelastomer. Note: an undersize rotor may be required for
elevated temperature applications.
TROUBLESHOOTING
WARNING: Before making adjustments, disconnect power
source and thoroughly bleed pressure from
system. Failure to do so could result in
electric shock or serious bodily harm.
Failure to Pump.
1. Belt or coupling slip: Adjust belt tension or tighten set screw
on coupling.
2. Wrong rotation: Rotation must be clockwise when facing
shaft.
3. Excessive suction lift, vacuum or obstruction in suction
piping.
4. Flexible joint broken; possible excessive pressure: Replace
joint, check pressure at discharge port.
Will Not Start.
1. Insufficient horsepower: Check motor starting torque for
minimum model starting torque given on performance
curves.
2. Low voltage: Check power supply.

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Noisy Operation.
1. Starved suction: Check fluid supply, length of suction line, and
obstructions in pipe.
2. Bearings worn: Replace parts; check alignment, belt tension,
pressure at discharge port.
3. Broken flexible joint: Replace part; check pressure at discharge
port.
4. Insufficient mounting: Mount to firm base. Vibration-induced
noise can be reduced by using mount pads and hose on
suction and discharge ports.
Pump Overloads.
1. Excessive discharge pressure: Check discharge pressure for
maximum rating given in Table 1. Check for obstruction in
discharge pipe.
2. Excessive temperature.
3. Belt or coupling slip: Check pressure at discharge port.
4. Loose bond in stator: High temperature and caustics will cause
bond between rubber and tube to fail. Replace stator. Check
fluid temperature and pressure at discharge port.
5. Fluid viscosity too high: See chart below for recommended
maximum RPM.
Viscosity CP Limit RPM
1-1,000 1750
1,000-2,500 1200
2,500-5,000 600
5,000-10,000 300
10,000-20,000 175
20,000-50,000 80
Based on 60% min. volumetric efficiency. See PEC449 or consult
Moyno representative for exact values.
6. Motor connected incorrectly: Motor wired for 230 VAC,
connected to 115 VAC service.
Poor Performance.
1. Low pressure; worn stator: Replace stator: Check for
excessive abrasive material in fluid. Check for run dry
condition.
Mechanical Seal Leakage.
1. Leakage at startup: If leakage is slight, allow pump to run
several hours to let faces run in.
2. Persistent seal leakage: Faces may be cracked from freezing
or thermal shock. Replace seal.
Pump Will Not Prime.
1. Air leak on suction side: Check pipe connections. Suction lift
over 15 ft. will cause seal faces to open.
2. Defective mechanical seal: Inspect and repair as necessary.
MAINTENANCE
General. These pumps have been designed for a minimum of
maintenance. The pump is one of the easiest to work on in that
the main elements are very accessible and require few tools to
disassemble.
Bearing Lubrication. The prelubricated, fully sealed bearings do
not require additional lubrication.
PUMP DISASSEMBLY
WARNING: Before disassembling pump, disconnect power
source and thoroughly bleed pressure from
system. Failure to do so could result in electric
shock or serious bodily harm.
1. Disconnect power source.
2. Remove suction and discharge piping.
3. Discharge coupling (9) may be removed from stator (21) by
unscrewing in a counter-clockwise direction (RH thread).
4. Remove stator support clamp screw and remove top half of
stator support (38).
5. Stator (21) may be removed from suction housing (2) by
unscrewing in a counter-clockwise direction (RH thread). Use
strap wrench on stator to avoid crushing with a pipe wrench.
Pull stator (21) from rotor (22). To assist removal of stator, hold
drive shaft (26) from turning and turn stator clockwise when
facing suction housing after disengaging thread.
6. Remove screws (112) holding suction housing (2) to bearing
housing (1) or adapter (74). Remove suction housing and
suction housing gasket (83). Gaskets on cast iron models only.
Remove O-Ring (270) on other models.
7. The rotor (22) and flexible joint (24) may be removed using the
following procedure (do not bend joint more than 15 degrees).
a. Remove rotor (22) from flexible joint (24) by using a punch
to remove rotor shaft pin (46). Support joint while removing
pin.
b. Remove joint (24) from shaft (26) by using a punch to
remove shaft pin (46).
8. Single Mechanical Seal Models. Carefully slide mechanical
seal (69) off shaft (26). Carefully pry seal out of bearing
housing (1), or seal housing (3). Remove seal housing if pump
is a stainless model.
Double Mechanical Seal Models. Carefully slide seal housing
(71) from the drive shaft. Remove rotational part of mechanical
seal from the shaft. Carefully remove seal gland (73) from
adapter. Remove stationary seal faces if required.
If any parts of mechanical seal are worn out or broken, the
complete assembly should be replaced. Seal components are
matched parts and are not interchangeable.
Packing Models. Slide stuffing box assembly from the shaft.
Remove packing gland halves and replace packing.
9. The bearings (29) and shaft (26) assembly can be removed
from bearing housing (1) after snap ring (66) has been
removed. To remove the shaft assembly, lightly tap the shaft at
the flexible joint connection end using a block of wood to
protect the shaft. The bearings may be pressed off the shaft.
PUMP ASSEMBLY
1. Press bearings (29) on shaft (26), and locate slinger ring (77)
on the shaft near the radial bearing.
NOTE: When replacing bearings, always press on the inner race
when assembling to shaft, and on the outer race when
pressing bearings into the housings.
2. Press shaft assembly into bearing housing (1) securing with
snap ring (66).
3. On stainless steel models install seal housing (3) in bearing
housing with O-Ring (270) installed in the O-Ring groove.
On packing models install stuffing box assembly (stuffing box,
packing, and packing gland) on shaft with O-ring (270) installed
in the O-ring groove.

4. Install mechanical seal (69) or (70) using the following procedure:
a. Clean and oil sealing faces using a clean light oil (not grease).
CAUTION: Do not use oil on EPDM parts. Substitute glycerin or
soap and water.
b. Oil the outer surface of the seal seat, and push the assembly
into the seal bore in the bearing housing (1), or seal gland and
housing, seating it firmly and squarely. On double seal models
install seal gland on shaft.
c. After cleaning and oiling shaft, slide the seal body along the
shaft until it meets the seal seat.
d. Install seal spring and spring retainer or seal housing with O-
rings (72 and 270) on shaft.
5. The flexible joint (24) and rotor (22) may be installed using the
following procedure (do not bend joint more than 15 degrees):
a. Pin flexible joint (24) to shaft (26) using the shaft pin (46).
b. Pin rotor (22) to joint using rotor pin (46). Support joint while
installing pin.
6. Secure suction housing gasket (83) (cast iron pumps only) and
suction housing (2) to bearing housing (1) using lock washers
(215) and screws (112).
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7. Slide stator support retainer (39) on stator (21).
8. Screw coupling (9) on stator (21) in a clockwise direction
(RH thread).
NOTE: Apply pipe “dope” on all pipe threads before assembly.
9. Lubricate rotor (22) surface to assist installation of stator
(21). Slide stator on rotor, and screw into suction housing
(2) by turning clockwise (RH threads). An additional assist
in installing stator is to lock the shaft from turning and
rotate the stator counter-clockwise while pushing towards
suction housing.
10. Secure clamp assembly (40) to the stator support (38) and
the support retainer (39) using the clamp assembly (40)
screw.
11. Proceed as in installation instructions.
WARNING: Replace belt or coupling guards before
reconnecting power.
When ordering parts, please specify pump model number,
pump serial numbr, part number, part description and quantity.
Double Seal Models
744733 711 700
266 722 2700
Packing Models
Note: Item 83 is used on cast iron only.

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BARE SHAFT MODELS PARTS LIST
Item Type Description Qty A4015, A4050, A4100, A4190,
A2400, A4400
1 CD Bearing Housing 1 3308813000
2 SS Suction Housing 1 3403932007
3 CD/SS Seal Housing 1 3403930007
9 SS Discharge Coupling 1 3205342020
21 See Table Stator 1 See Stator Table
22 See Table Rotor 1 See Rotor Table
24 Q,R,B,F Flexible Joint 1 3308811005
26 SS Drive Shaft 1 3303577002
29 SS Bearing 2 6300503031
37 SS Body Support 1 3403947001
38 SS Stator Support 1 3403945001
39 SS Stator Support Retainer 1 3201733000
40 SS Clamp Assembly 1 3204277000 and 3201734000
46 SS Rotor/Shaft Pin 2 3204069001
66 SS Snap Ring 1 3205162000
69 Q,R,B,F Mech Seal (Cbn vs Cer) 1 3206501000
69 Q,R,B,F Mech Seal (AR) 1 3206503000
70 Q,R,B,F Double Mechanical Seal 1 3208652002
71 SS Seal Housing, Double 1 3403986015
72 Q,R,B,F O-Ring 1 3207902128
73 SS Seal Gland, Double 1 3403985015
74 SS Adapter 1 3501688004
75 SS Packing Set 1 3403396002
76 SS Suffing Box 1 3403934007
77 SS Slinger Ring 1 3206382000
78 SS Packing Gland Half 2 3403933007
79 SS Packing Gland Stud 2 3208591000
83 Q,R,B,F Housing Gasket 1 3203028005
112 SS Screw 4 6191520141
215 SS Lock Washer 4 6230010401
261 SS Drain Plug 1 6100420030
270 Q,R,B,F O-Ring 1 3207905134
300 SS Nameplate 1 3208597000