moyno 500 600, 60301, 61001, 62201, 63301 Service Manual

SERVICE MANUAL

MOYNO® 500 PUMPS

60301, 61001, 62201, 63301, 65501, 60311,
61011,

DESIGN FEATURES

Housing: Cast iron
Pump Rotor: Heavy duty chrome plated

AISI 416 stainless steel
Pump Stator: NBR (Nitrile
Shaft: AISI 416 stainless steel
Bearings: Prelubricated, fully sealed ball

bearings
Seal: Mechanical or packing
Flexible Joint: Prelubricated and sealed
*Packing Models available through retrofit kit. See
page 6.
Note: Alternate elastomers available. Refer to
Repair/Conversion kit numbers. page 6.

)

62211

,

600 SERIES

63311, AND 65511* MODELS

Section:
MOYNO

®

500 PUMPS

Page: 1 of 6
Date: March1, 1998

INSTALLATION

Mounting.

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.

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.

avoid excessive strain on pump housings. See Table
1 for suction and discharge port sizes of each pump
model. Use pipe ‘dope” or tape to facilitate
disassembly and to provide seal.

Drive.

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.

Water Flush of Packing (Packing Models Only).

The packing may be either grease lubricated through
a grease fitting in the stuffing box or have plumbing
connected to the housing to allow a water flush.

When the material being pumped is abrasive in
nature, it may be advantageous to flush the packing
to prevent leakage under packing and
wear.

Provide the proper alignment between the

Prior to connecting pump, wet pump

Piping to pump should be self-supporting to

On belt driven units, adjust belt tension to point

excessive shaft

Clean water can be injected through a 1/8” NPT
tapped hole that normally houses the grease fitting for
lubricating the packing. The water can be permitted to
leak axially along the shaft in either direction.

OPERATION

Self-Priming.

mechanical seal model pump is capable of 15 feet of
suction lift when operating at 1750 rpm with pipe size
equal to port size. The packing model is capable of 25
feet of suction lift.

DO NOT RUN DRY

for lubrication. For proper lubrication, flow rate should
be at least 10% of rated capacity.

Pressure and Temperature Limits

maximum discharge pressure of each model. Unit is
suitable for service at 10° to 160°F with NBR (Nitrile),
and to 210°F with EPDM (Ethylene-Propylene-Diene
Terpolymer) elastomers.

Storage

periods using pipe plug in suction housing.

Pump
Model

Suction Port
(NPT)
Discharge
Port_(NPT)
Discharge
Pressure (psig)
*Minimum
Starting Torque
(IN-LB)

*Based on water at ambient temperature.

With wetted pumping elements, the

. Unit depends on liquid pumped

. See Table 1 for

. Always drain pump for extended storage

Table 1. Pump Data

60301
60311

3/4 3/4 3/4 1-1/4 1-1/4
1/2 3/4 3/4 1-1/4 1-1/4

600 600 300 150 60

95 180 90 70 60

61001
61011

62201
62211

63301
63311

65501
65511

Page 2

TROUBLE SHOOTING

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.

Belt or coupling slip: Adjust belt tension or tighten

1.

set screw on coupling.
Wrong rotation: Rotation must be clockwise when

2.

facing shaft.
Excessive suction lift, vacuum or obstruction in

3.

suction piping
Flexible joint broken; possible excessive

4.

pressure:
Replace joint, check pressure at discharge port.

Will Not Start.

Insufficient horsepower: Check motor starting

1.

torque for minimum model starting torque given
Table 1.

Low voltage: Check power supply.

2.

Pump Overloads.

Excessive discharge pressure: Check discharge

1.

pressure for maximum rating given in Table 1
above. Check for obstruction in discharge pipe.

Excessive temperature: Check fluid temperature

2.

for a maximum of 160°F.
Belt or coupling slip: Check pressure at discharge

3.

port.
Loose bond in stator: High temperature and

4.

caustics will cause bond between rubber and
tube to fail. Replace stator, check fluid
temperature and pressure at discharge port.

Fluid viscosity too high: Recommended maximum

5.

RPM.

Viscosity CP Limit RPM

1-300 1750

300-1,000 1200
1,000-2,000 700
2,000-5,000 350

5,000-10,000 180

10,000-20,000 100

6. Motor connected incorrectly: Motor wired for 230
VAC, connected to 115 VAC service.

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 be secure to firm
base. Vibration induced noise can be reduced by
using mount pads and hose on suction and
discharge ports.

Poor Performance.

1. Low pressure; worn stator: Replace stator: check
for excessive abrasive material in fluid, check for
run dry condition.

Mechanical Seal Leakage (Mechanical Seal
Models Only).

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.

Packing Leakage (Packing Models Only).

1. Leakage at startup: Adjust packing as outlined in
maintenance instructions.

Note: Slight leakage is necessary for lubrication of

in

packing.

2. Persistent leakage: Packing rings and/or shaft
may be worn. Replace parts as required.

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.

minimum of maintenance, the extent of which is
routine lubrication and adjustment of packing. The
pump is one of the easiest to work on in that the main
elements are very accessible and require few tools to
disassemble.

Packing Lubrication (Packing Models Only).

zerk fitting on the top of the packing housing leads to
the lantern ring halves in the mid-section of the
packings. At least once a week, inject a small quantity
of good quality grease, such as MPG-2 Multi Purpose
Grease (DuBois Chemical), or equivalent, into the
zerk fitting to lubricate the packings.

Packing Adjustment (Packing Models Only).

Packing gland attaching nuts should be evenly
adjusted so they are little more than finger tight. Over­tightening of the packing gland may result in
premature packing failure and possible damage to the
shaft and gland.

When the packing is new, frequent minor
adjustments are recommended for the first few hours
of operation in order to compress and seat the
packing. Be sure to allow slight leakage for lubrication
of packing.

When excessive leakage can no longer be
regulated by tightening the gland nuts, remove and
replace the packings in accordance with the
DISASSEMBLY and REASSEMBLY instructions. The
entire pump need not be disassembled to replace the
packings.

Bearing Lubrication.

bearings do not require additional lubrication.

These pumps have been designed for a

The

The prelubricated, fully sealed