AMT 1.5G2P, Owner'S Manual, Page: 8 / 12

WARNING!!
DO NOT USE PUMP IN EXPLOSIVE ATMOSPHERE
DO NOT PUMP VOLATILE OR FLAMMABLE LIQUIDS
Installation & Operating Instructions
Self-Priming Centrifugal Pump
REPAIR AND MAINTENANCE
INSTRUCTIONS:
To disassemble pump follow these steps:
1. Remove body bolts (24) and nuts (21).
2. Remove body (18).
3. Remove the two stainless screws (11).
4. Follow these instructions for removing the impeller
(2):
a. If there is a hex head screw in the center of
the impeller, remove the screw and pry the
impeller off the shaft (use two short
screwdrivers and pry behind impeller with the
screwdrivers at 3 o’clock).
b. If there is not a hex head screw in the center
of the impeller hub, remove the impeller by
rotating the impeller counter-clockwise. It may
be necessary to strike the end of one of the
impeller vanes with a wood block and hammer
to start the counter-clockwise rotation.
5. If the mechanical shaft seal (8) needs replacing:
a. With a screwdriver, pry the white seal ring and
its rubber boot out of the back of the impeller.
b. Remove the pump bracket (rear housing) (13)
by removing the four bolts (4).
c. To remove the seal assembly from the the
rear housing, drive it out from behind.
6. To replace the seal component in the rear
housing, coat the bore in the housing where the
seal goes with gasket material (Permatex or
equivalent) and press the seal component into the
housing by using an arbor press or drill press.
Use a short piece of pipe that fits on the small
flange of the seal case so that you are not
pressing on the delicate, finely finished, carbon
seal ring. Do not damage the seal face.
7. To replace the seal component in the impeller
hub, lubricate the outside of the rubber boot with
vegetable oil or soap and press the white ring and
rubber boot into the hub using your two thumbs.
Be certain that the seal ring is all the way down
and even with the back of the impeller so that the
ring does not wobble when the impeller rotates on
the shaft. Do not damage the surface of the white
ring.
8. Re-assemble the pump in the reverse manner
from the disassembly. Use thread sealant on four
(4) bolts that bolt bracket to pedastal.
To disassemble the bearing pedestal follow these
steps:
1. Remove the pump - step 1 through 5b above.
2. Remove snap ring (43) and tap shaft out with
rubber mallet or use wood block to protect shaft at
impeller end.
3. Remove bearings with bearing puller or by tapping
shaft off bearings. Use rubber mallet or wood
block to protect shaft.
4. Clean bearing bores in pedestal and shaft
surfaces and apply Loctite 609 or 620 or
comparable product to shaft bearing surfaces and
install bearings.
5. Apply the loctite or comparable product to bearing
surfaces in pedestal and install shaft and bearings
in pedestal.
6. Replace snap ring and re-assemble pump in
reverse manner from disassembly.
9/01 46-051