Starting; Lubrication - ITT MARLOW Serie Manual De Instalación, Operación, Mantenimiento

ing cycle. In systems with high discharge heads, it may be
advisable to install an air release line between the pump
casing and discharge check valve to aid their venting . The
size of the air release line is selected such that it does not
signifi cantly affect the discharge capacity. You may install
an air release line through the fi ller plug hole if necessary.
However, the preferred location is in the discharge line,
between the pump and the discharge check valve, as close
to the discharge check valve as possible. We recommend
the following line sizes for the following ITT pumps:
3DTH and 4DTH
6ETH
8GTH and 10GTH
NOTE:
1. This line size may be increased or decreased de-
pending on application.
2. Direct the air release line back into the sump (not
into the pump suction line). Leave the end of the line
open to atmosphere. Do not submerge into the liquid
being pumped.
3. The air release line may clog, particularly if a shut
off valve is installed in the line and is closed during
operation. If this condition occurs, either use a larger
line or leave the shut off valve open during pumping
operation. To aid in maintaining air release lines, fi t
them with crosses instead of elbows.

STARTING

Follow the motor manufacturer's instructions carefully.
Before starting fi ll the pump casing with liquid through
the priming plug provided. Your pump has been designed
to prime itself in a few minutes. High suction lifts require
additional time and reduce the performance of the pump.
Should you have diffi culty, refer to the Troubleshooting
Guide.
ITT self priming pumps prime and reprime themselves
providing the casing is fi lled with liquid. Should you lose
this liquid from the casing accidentally or by draining
purposely, it will be necessary to fi ll casing with liquid
before starting.
Check oil level in bearing housing cavity. Units are
shipped without oil. Fill bearing housing oil cavity with
proper grade of oil. (Refer to "Lubrication" for proper oil
level.)
Check drive coupling and "V" belt alignment. (Refer to
"Coupling Alignment" for instructions.)
Check motor wiring.
WARNING
1. All electrical work must be done by a licensed
electrician.
2. Before working on pump and/or motor be certain
that the electrical power is off at the main junction
box.
3. Disconnect the fuse or circuit breaker and have the
main switch tagged "DO NOT ENERGIZE THIS
SWITCH, PERSONNEL WORKING ON
EQUIPMENT".
4. Some motors are equipped with built-in thermal
¾" Line
1" Line
1¼" Line

LUBRICATION

A. BEARING LUBRICATION: (Refer to drawing)
B. SEAL CAVITY LUBRICATION:
overloads to shut off the motors in the event the
temperature becomes excessive (as a result of low
voltage, poor ventilation, over loaded lines, etc.).
These motors will restart automatically as the motor
cools down. For safety sake, DO NOT work on any
motor without shutting off the electricity.
5. Never operate an electric motor driven pump with-
out properly grounding the motor frame. Serious
injury or death by electrocution could result.
6. Drain pump casing completely before taking pump
apart. It is advisable to fl ush the inside of the casing
with water before taking pump apart.
7. Never start pump before putting back all necessary
guards such as coupling guard and/or belt guard.
Use good grade SAE #30 non-detergent motor oil.
Units are shipped without oil and must be fi lled before
starting. Fill bearing housing oil cavity with oil through
"fi lter" provided on top of bearing housing nearest mo-
tor until oil starts to drip out of "oil level" hole. ("Oil
Level" cast on housing.) Install breather to vent any oil
vapor.
Also, provision is made on the housing to install "con-
stant level oiler". ("Oiler" cast on housing.) This oiler
can be supplied as an optional item.
Under normal service, drain and refi ll housing cav-
ity oil yearly. However, oil level should be checked
regularly.
BEARING CAVITY OIL CAPACITY:
3DTH and 4DTH
6ETH
8GTH
10GTH
Use good grade SAE #30 non-detergent motor oil.
Units are shipped without oil and must be fi lled before
starting.
Fill seal cavity with oil through hole provided on top
of bearing housing nearest pump casing, until you see
oil through hole opening. Install breather to vent any
oil vapor.
NOTE: It is recommended that the seal cavity oil be
drained (through the drain hole) and replaced with
clean grade SAE #30 non-detergent motor oil every
6 months.
The mechanical shaft seal is a wearing part that will
eventually need to be replaced. A leaky seal must be
replaced quickly to prevent damage to the pump. Any
overfl ow of liquid through the breather (vented plug)
is an indication of a possible seal failure.
OIL CAPACITY OF SEAL CAVITY:
3DTH
4DTH
6ETH
8GTH
10GTH
:56 fl . oz.
:68 fl . oz.
:68 fl . oz.
:68 fl . oz.
:20 fl . oz. minimum
:20 fl . oz. minimum
:20 fl . oz. minimum
:20 fl . oz. minimum
:20 fl . oz. minimum
5