Product Manual

Specications Information and Repair Parts Manual 2MP Series
2MPX-250-00 3 11/2016
5. Position bracket on seal plate. Seal plate outside diameter
locates into large bore in bracket engine side. Slide bracket
back onto seal plate and adapter. Fasten bracket to adapter
with four 3/8-16x1” hex screws (Ref. No. C6). Tighten
screws to 140 in-lb torque.
Install Stub Shaft
1. Apply permanent thread locker onto threads of 3/8-16x3/4”
hex screw (Ref. No. A14). Install screw into threaded bore
in threaded end of stub shaft (Ref. No. A13).
2. Lubricate inside diameter of rubber portion of shaft seal
head (Ref. No. A16) with soapy water. Insert smooth
outside diameter of stub shaft into seal head. Slide seal
head onto stub shaft. Seal head rotating ring face should
be towards engine shaft end of stub shaft.
3. Locate stub shaft onto end of engine shaft. Thread on
clockwise until stub shaft bottoms on end of shaft collar. This
will position the seal head. Be careful when tightening stub
shaft that seal seat ring or seal head ring is not damaged.
ALL PUMPS:
Install Second Stage Impeller & Diuser
1. Thread impeller (Ref. No. A11) (both are identical) onto
stub shaft until it bottoms on stub shaft shoulder. On 1”-
14 engine shaft units, be careful that seal spring washer
doesn’t become pinched between impeller and stub shaft
shoulder. Washer must slide up over stub shaft.
2. Install di󰀨user #2 (Ref. No. A2) over impeller, align holes
in di󰀨user with ¼-20 studs in bracket, locate on seal plate.
Fasten with two ¼-20 hex nuts (Ref. No. A3).
Do not over-tighten nuts or damage to diuser casting will
result. Use thread locking compound such as Loctite and
tighten nuts to 35 lb-in maximum
3. Install #148 o-ring (Ref. No. D3) on front of di󰀨user #2.
Lubricate o-ring with soapy water.
4. Install impeller spacer (Ref. No. A12) on stub shaft. Slide
on until spacer bottoms against impeller #1.
Install First Stage Diuser
1. Install bushing (Ref. No. A7) into di󰀨user #1 (Ref. No. A6).
Press bushing into bore in impeller #1 side of di󰀨user #1
casting.
2. Slide di󰀨user #1 over stub shaft. Align bushing with spacer.
Di󰀨user #1 locates on front nose diameter of di󰀨user #2.
Push di󰀨user #1 until it bottoms against di󰀨user #2 shoulder.
3. Rotate di󰀨user #1 until cast drain slot is positioned down
and holes in ears align with tapped holes in di󰀨user #2.
4. Thread impeller #1 (Ref. No. A11) onto stub shaft until it
bottoms against spacer.
Install Diuser Cover
1. Install #169 o-ring (Ref. No. D2) on di󰀨user cover (Ref. No.
A8). Lubricate o-ring with soapy water.
2. Locate di󰀨user cover o-ring diameter into di󰀨user #1 bore.
Position di󰀨user cover nose up. Align di󰀨user cover bolt
ears with ears in di󰀨user #1 and di󰀨user #2. Slide di󰀨user
cover into di󰀨user #1 until it bottoms.
3. Install three ¼-20x3” hex screws (Ref. No. A9) with at
washer (Ref. No. A10) through the di󰀨user cover and
di󰀨user #1 threading into tapped holes in di󰀨user #2.
Tighten screws until all parts t metal to metal and all
o-rings are compressed. Do not over tighten.
4. Install check valve (Ref. No. D1) onto di󰀨user cover suction
nose. Position check valve so apper hinges at the top or
12:00 position.
Check Rotation
1. After di󰀨user assembly is complete rotate driver shaft and
check for interference.
2. There may be some drag or rubbing of the impeller nose in
its bore. This is normal.
3. Driver shaft must rotate relatively freely. Drag of impeller
nose in its bore cannot greatly restrict shaft rotation.
Install Casing
1. Install #378 o-ring (Ref. No. D4) onto casing (Ref. No. H1).
Lubricate o-ring with soapy water.
2. Install six hex screws (Ref. No. H3) through casing ears.
Fix screws in position by sliding a #109 o-ring (Ref. No. H2)
over each screw into casing ear back bore.
3. Install a #117 o-ring (Ref. No. D8) onto a plug (Ref. No.
D7). Lubricate o-ring with soapy water. Install plug into
casing drain port.
4. Position casing onto bracket, locate casing o-ring nose into
bracket front bore. Slide casing into bore until it bottoms.
Tighten all six hex screws in a diagonal pattern fastening
casing to bracket. Tighten screws to 100 in-lb torque.
5. Check operation of check valve. Check valve must swing
freely.
Install Suction Flange
1. Position a ange gasket (Ref. No. D6) on the casing (Ref.
No. H1) suction ange.
2. Position suction ange (Ref. No. H4) on ange gasket.
Install four screws (Ref. No. H5) tighten to 100 in-lb torque.
Alternate tightening screws in a cross pattern to reduce the
chance of crushing the ange gasket.
Assemble 3-Way Discharge Manifold
1. Install #117 o-ring (Ref. No. D8) onto a plug (Ref. No.
D7). Lubricate o-ring with soapy water. Install plug into
discharge manifold (Ref. No. H6) top ll port.
2. Install #316 o-ring (Ref. No. D9) in both 1” NPT caps (Ref.
No. H8). Lubricate o-ring with soapy water. Thread a cap
onto each 1” NPT discharge port of manifold. Tighten until
o-ring compresses against end of port.
3. Install #325 o-ring (Ref. No. D10) in the 1-1/2” NPT cap
(Ref. No. H9). Lubricate o-ring with soapy water. Thread
2MP Series Pumps