Armstrong 4360 - 2.6 General Care; 2.7 Lubrication

installation &
operating instructions
Commercial pumps Series 4300, 4360 and 4380
Vertical In–Line pump
9
caution:
A
Check rotation arrow prior to operating the unit. The
rotation of all Armstrong Vertical In-Line units is
clockwise when viewed from the drive end. (Looking
from on top of/behind the motor).
2.6 general care
Vertical In-Line pumps are built to operate without periodic
maintenance, other than motor lubrication on larger units. A
systematic inspection made at regular intervals, will ensure
years of trouble-free operation, giving special attention to
the following:
•Keepunitclean.
•Providethemotorwithcorrectlysizedoverloadprotection.
•Keepmoisture,refuse,dustorotherlooseparticlesaway
from the pump and ventilating openings of the motor.
•Avoidoperatingtheunitinoverheatedsurroundings
(above 100°f/40°c).
warning:
Whenever any service work is to be performed on a
pumping unit, disconnect the power source from the
driver, lock it o and tag with the reason. Any
possibility of the unit starting while being serviced must
be eliminated.
•Ifmechanicalsealenvironmentalaccessoriesareinstalled,
ensure water is flowing through the sight flow indicator and
that filter cartridges are replaced as recommended.
(See Armstrong files 43.85 & 43.86 for seal
environmental instructions).
2.7 lubrication
Pump
Lubrication is not required. There are no bearings in the pump
that need external lubrication service.
Large Series 4300 units are installed with a shaft bushing
located beneath the impeller that is lubricated from the pump
discharge. This bearing is field removable for service on the
20 × 20 × 19 size without disturbing the motor or other major
pump components.
Service instructions for the lower bearing is to be found in
File no: 43.805.
Motor
Follow the lubrication procedures recommended by the motor
manufacturer. Many small and medium sized motors are per-
manently lubricated and need no added lubrication. Generally
if there are grease fittings evident the motor needs periodic
lubrication. None if not.
Check the lubrication instructions supplied with the motor for
the particular frame size indicated on the motor nameplate.
Mechanical Seal
Mechanical seals require no special attention. The mechanical
seal is fitted with a flush line. The seal is flushed from discharge
of the pump casing on Series 4300 pumps and is flushed/vent-
ed to the suction on close coupled pumps, Series 4360 & 4380.
The Series 4300 pump is flushed from the pump discharge be-
cause the mechanical seal chamber is isolated from the liquid
in the pump by a throttle bushing. Because the seal chamber is
isolated, seal environmental controls such as filters and separa-
tors, when installed in the Series 4300 flush line are very eec-
tive, as only the seal chamber needs cleansing, and will prolong
seal life in hvac systems.
Do not run the pump unless properly filled with water as the
mechanical seals need a film of liquid between the faces for
proper operation.
Mechanical seals may ‘weep’ slightly at start-up. Allow
the pump to continue operating for several hours and the
mechanical seal to ‘seat’ properly prior to calling for
service personnel.
The following Armstrong files are available for mechanical seal
replacement instructions:
•Series4360 & 4380: File no. 43.81
•Series4300: p-Base and tcz Motor Frame – File no. 43.84
tc Motor Frame – File no. 43.88