Hale MG - Manual (Page 82)

Muscle Pumps
5-18
5. Assembly (Two-Stage Pump)
a. Clean the impeller shaft, the keyway,
and the seal housing and face.
b. Check the waterway in the seal
housing for restrictions.
c. Install the new gasket on the seal
housing face.
d. Install the key into the keyway.
IF THE IMPELLERS OR THE CLEARANCE
RINGS ARE DROPPED, DAMAGED OR
DEFORMED, THEY WILL NEED TO BE
REPLACED.
e. Install the inner clearance ring with
proper orientation.
WEAR PROTECTIVE, HEAT-RESISTANT
GLOVES WHILE HEATING THE IMPELLER
TO INSTALL IT INTO THE IMPELLER SHAFT.
HEATED METAL CAN CAUSE INJURY TO
YOUR HANDS.
f. Using the torch, heat the “eye” and
hub of each impeller for approxi-
mately two minutes. Then, slide the
individual impellers onto the shaft
making sure they are in the correct
orientation. Make sure the center sup-
port bearing is installed between
impellers. If an impeller does not fully
slide onto the shaft allow the
assembly to cool to room temperature
before reheating.
g. Install the outer retaining ring.
h. Install the outer clearance ring with
proper orientation.
i. Slide AutoLube® assembly over
pump shaft.
6. Installation (Impeller and Clearance
Rings)
a. Install the pump body gaskets to the
lower pump body, trimming as
necessary to fit.
FAILURE TO LINE UP THE CLEARANCE
RING LOCK NOTCHES WITH THE PUMP
BODY TABS (AS DESCRIBED IN THE NEXT
STEP) MAY RESULT IN PUMP DAMAGE AND
PUMP FAILURE.
b. Install the impeller assembly into the
lower pump housing, carefully
aligning the clearance ring lock
notches with the clearance ring lock
tabs in the lower pump body. Then,
rotate the clearance rings to one side
to open up lock notches to line up
with the lock tabs in the upper pump
body.
c. through the rear bearing housing and
the seal housing. Do not tighten.
d. Install the 1/2-13UNC X2 inch long
cap screws into the AutoLube®
housing and lower pump body.
e. Make sure the dowel pins are in the
upper pump body to assist in aligning
the lower pump body with the upper
pump body.
f. Using a lifting device, slowly raise the
lower pump body and the impeller
assembly into place, making sure that
the lower pump body aligns with the
dowel pins and the clearance ring
notches align with the clearance ring
lock tabs in upper pump body.
g. Rotate the impeller shaft and check
for freedom of movement when the
lower pump body and the impeller
assembly is in place.