Barnes 30MU, Installation And Operation Manual

Page: 6 / 20

C-4) Driver:
Read Engine Or Motor Manufacturer’s Instruction Book.
C-5) Pump Lubrication:
The only part of the pump requiring lubrication is the bearing
housing. The impeller and shaft seal are lubricated by the
liquid being pumped and need no other lubrication.
CAUTION! - DO NOT operate pump without liquid
in pump body as operating dry will result in
damage to the seal.
The bearing housing is factory filled with 90 weight oil, for
bearing lubrication. The oil level in the bearing housing
should be periodically checked. This is accomplished by
removing the oil dip stick and checking oil level shown on it.
If oil is required, add through the dip stick hole.
SECTION D: OPERATION:
D-1) Priming:
Remove the priming plug(s) (11) in the top of the pump body
(10), and fill the pump body completely with liquid as free of
solids as possible. In freezing weather, the pump should be
primed with warm water, if possible, to prevent any damage
that may be caused by ice films within the pump.
D-2) Starting:
After completion of procedures outlined in Section C and D-1,
the pump is then ready for operation. Start pump by applying
power to motor or by starting engine as outlined in the
ENGINE or MOTOR INSTRUCTION MANUAL.
D-3) Shutdown:
Operation may be discontinued by stopping the engine as
outlined in the ENGINE MANUAL or by disconnecting electric
power if motor driven.
When the pump has been operating in freezing weather or
in liquid containing a considerable amount of solids, it is
advisable to drain the pump body by removing drain plug (12)
and flushing the solids out of the body. Replace the drain
plug.
D-4) Restart:
At each subsequent start, particularly if the pump has been
drained, the priming liquid level should be checked since the
pump is self-priming only when the body is full of liquid.
SECTION E: PUMP SERVICE AND REPAIR:
E-1) Check Valve Service:
To clean out or repair check valve, disconnect suction piping.
Remove hex nuts (2) and suction flange (1).
DO NOT PRY
ON FLANGE but rather bump off with a block of wood and a
hammer. Pull off gasket (3) together with weights (4) and (5),
round head screw (6) and lock washer (7).
Examine and replace any parts showing wear or damage.
When replacing gasket and weight assembly onto pump
body make sure that HINGE section of gasket (3) is at TOP
and that LARGE weight is on PUMP SIDE of gasket.
E-2) Body, Wear Plate and Impeller Service:
To clean out or repair the body (10), wear plate (15) or
impeller (17), disconnect suction and discharge piping.
Remove hex nuts (40) and pull body (10) together with wear
plate (15) from bearing housing (34). This will expose the
body (10), wear plate (15) and impeller (17) for clean out or
replacement. Clean and examine body (10), body gaskets
(21) and (22), wear plate (15) and impeller (17), replace if
required.
When wear plate (15) needs replacing, remove screws (16)
and pull wear plate from body (10) and replace.
When impeller (17) needs replaced, unscrew impeller from
shaft. The impeller is screwed onto the shaft with right hand
thread, and to break loose use a block of wood against a
vane and strike with a hammer. At reassembly make sure to
use a combination of impeller shims (18) and (19) and body
gaskets (21) and (22) to result in an impeller-to-wear plate
clearance of approximately .015". Also be sure lifting bail (39)
is in place before assembling body to bearing housing.
E-3) Shaft Seal Service:
To examine or replace shaft seal, remove body (10) and
impeller (17) as outlined in Paragraph E-2. Remove impeller
shims (18) and (19) and seal (20) spring. Remove seal
rotating member from shaft (32). Remove screws (41) and
pull seal plate (23) together with stationary seat and ring from
bearing housing (34).
All of the components of the shaft seal are now exposed for
examination. If any part shows wear or damage, replace
entire shaft seal assembly.
CAUTION! - Handle seal parts with extreme care.
DO NOT scratch or mar lapped faces.
Lightly oil the ring and push seat and ring into seal plate (23).
Reassemble seal plate (23) onto bearing housing (34).
Lightly oil shaft (32) and inner surface of rotating member.
With lapped surface facing bearing housing, slide rotating
member onto shaft (32) until lapped faces of rotating member
and ring are together. If finger pressure is not sufficient use
a piece of tubing to press on bellows only, not on the retainer.
Make sure driving lugs in retainer are mated into rotating
member.
Place spring over shaft and in place on rotating member
making sure it is seated in retainer and not cocked or resting
on bellows. Reassemble impeller shims (18), (19) and
inpeller (17). Make sure spring is properly engaged in
retainer and impeller (17).
6
Manual Index HOME MENU