Hale MG - Manual (Page 76)

Muscle Pumps
5-12
2. Installation
WHEN APPLYING THE ETHYLENE GLYCOL
OR SOAP AND WATER SOLUTION, MAKE
SURE ALL SHAFT SURFACES AND THE
INSIDE OF THE SEALING BOOT ARE
COATED.
a. Being careful not to touch the sealing
surface of the mechanical seal seat,
apply a solution of ethylene glycol
(anti-freeze) or soap and water to
lubricate the pump shaft and inside of
the seat assembly. Slide the cup and
seat assembly over the impeller shaft.
Using a soft clean pusher tube (a short
length of 2 inch PVC pipe) make sure
the cup and seat assembly are seated
squarely in the rear bearing housing.
b. Keeping fingers away from the carbon
seal ring apply a solution of ethylene
glycol (anti-freeze) or soap and water
to lubr icate the shaft and inside of the
seal bellows. Orient the carbon seal
ring towards the seal and slide the
bellows and spring over the impeller
shaft. Use the pusher tube to make
sure the assembly is pushed all the
way in. If resistance is felt, add more
ethylene glycol (anti-freeze) or soap
and water to keep the shaft and
bellows lubr icated.
c. Insert impeller key in the impeller
shaft and install the impeller on the
shaft.
d. Install impeller nut and tighten to 135
ft-lb (183 N-m) Lock the impeller nut
in place using a cotter pin.
e. Apply a light coating of grease to the
seal ring groove and install a new seal
ring on the rear bearing housing.
f. Install a new gasket on the rear
bearing housing, holding it in place
with a light coating of grease.
g. Thread two 7/16-14UNC studs in the
pump body to help guide the rear
bearing housing onto the pump body.
h. Using proper lifting device lift
gearbox and impe ller assembly into
place. Use studs to guide the rear
bearing housing into the pump body.
i. Insert the 7/16 –14UNC X 1-1/4 inch
long cap screws into the rear bearing
housing. Tighten screws to 40 ft-lb
(58 N-m) torque.
j. Reconnect drive shafts, electrical, and
air lines to gearbox.
k. Refill the gearbox with oil.
l. Test operate apparatus and watch for
leaks.