AMT MSV1 Series, Specifications Information And Repair Parts Manual, Page: 3 / 16

Specifications Information and Repair Parts Manual
MSV1, MSV3 and MSV5 Series
5910-251-00 3 10/2016
REASSEMBLY
1. Remove key (if present) from new Motor shaft and discard.
2.
Wipe any protective film from Motor end bell and shaft, be sure they are
clean.
3. Carefully guide Motor shaft into Coupling while setting new Motor into
place.
4. Reinstall four Fasteners thru Adapter. Tighten evenly and in diagonal
pattern, then torque to the following specifications:
3/8..................................................................................17 ft-lbs. [23 N-m]
1/2..................................................................................30 ft-lbs. [41 N-m]
5. Locate shaft keyway in center of Coupling (See Figure 3) and maintain
this position, then snug up Fasteners evenly. Check gap between coupling
halves to be sure it remains even on both sides. Torque Fasteners to the
following specifications.
M6 .....................10 ft-lbs. [14 N-m]
M8 .....................23 ft-lbs. [31 N-m]
M10....................46 ft-lbs. [62 N-m]
6. Rotate pump Shaft by hand. If binding or rubbing is found, loosen Coupling
and readjust position.
7. Reattach Shields and proceed to Startup Procedure section.
SHAFT SEAL REPLACEMENT
DISASSEMBLY
Refer to Figure 7.
1. Remove Motor (see Motor Replacement section).
2. Remove Coupling (Ref. No. 3) and Rod (Ref. No. 2) by unthreading
Screws (Ref. No. 4).
3. Loosen, but do not remove set screws in Shaft Seal Assembly (Ref. No.
7).
4. Unscrew Shaft Seal Assembly in a counter-clockwise direction, then
carefully lift off of Shaft (Ref. No. 21).
REASSEMBLY
IMPORTANT : Pump Shaft may have been gouged from set screws. Before
installing new Shaft Seal Assembly, smooth-over these gouges with a light grit
emery cloth to prevent damage to new seal.
1. Once shaft is free of burrs, lubricate Shaft and o-ring cavity in Adapter
(Ref. No. 8) with soapy water.
2. Carefully slide new Shaft Seal Assembly onto Shaft, then tighten in
clockwise direction and torque to 26 ft-lbs [35 N-m].
3. Mark or otherwise note shaft height. Lift shaft as high as it will go, then
lower it back down ½ the total distance. Maintain this position while evenly
tightening 3 set screws in seal collar and torque each to 2 ft-lbs. [2.5 N-m].
4. Place Rod thru Shaft, then reinstall Coupling and screws but do NOT
tighten.
5. Proceed to Reassembly under Motor Replacement section.
PUMP OVERHAUL/INSPECTION
To inspect condition of pump internals, proceed as follows:
NOTE: To facilitate overhaul, a handy holding device can be made easily. Take
a short piece of 2×4 lumber and on the narrow side, drill a 1/2” diameter blind
hole 3” deep. Place block into bench vice with hole facing up to receive pump
shaft after step 5 (see Figure 4).
DISASSEMBLY
1. Proceed to Disassembly under Shaft Seal Replacement.
2. Remove 4 Fastener sets (Ref. Nos. 15 & 16).
3.
Lift Adapter (Ref. No. 8) from pump, use a soft mallet to break loose
if necessary. NOTE: Inspect o-ring groove in Adapter after o-ring is
removed. Rust/pitting in this region may cause leaks, be sure to clean or
replace Adapter entirely if damage is excessive.
4. Remove wave Spring (Ref. No. 18) from Adapter. NOTE: Inspect wave
Spring for cracks and replace if found.
5. Pump internals can now be removed all at once. Use pump Shaft (Ref.
No. 21) as a handle and gently lift the entire assembly out. If stage-1
Volute (Ref. No. 38) stays behind, it can be removed and inspected later.
Figure 3 - Coupling Alignment
Figure 4 - Inspection
Multistage Centrifugal Pumps