SANDPIPER MSMA3-A - Manual (Page 2)

W a r r e n R u p p , I n c • A U n i t o f I D E X C o r p o r a t i o n • P. O . B o x 1 5 6 8 , M a n s f i e l d , O h i o 4 4 9 0 1 - 1 5 6 8 U S A
Telephone (419) 524-8388 • Fax (419) 522-7867 • www.warrenrupp.com
Remove strainer assembly secured with four cap nuts. Impeller is removed by
inserting block of wood, hammer handle, or similar object between impeller vane and
pump casing (see Figure 2) to prevent rotation and turn shaft counterclockwise from
air motor end with drift pin inserted through hole in shaft. Remove shaft assembly
from volute casing by removing snap ring above oil seal, bump shaft and bearing from
casing. Rotating portion of shaft seal can now be removed from shaft and stationary
seal seat can be removed from casing.
REASSEMBLY
When installing shaft seal on shaft use a lightweight oil and locate seal at extreme
end of shaft so that carbon face of seal will contact seal seat before bearing enters
housing bore during assembly. This eliminates the possibility of carbon washer falling
out of position in seal cage while bumping shaft and bearing assembly into correct
position. Push oil seal and retainer into bore above bearing and install snap ring.
Install governor weights, spool and spring if removed. Lay o-ring into casing bore and
install intermediate housing. Install o-ring and drop governor housing into position and
push down into place. Slide sleeve and spacer onto shaft with spacer and shaft holes
in alignment. Install coupling and tighten securely with drift pin and pipe wrench with
same procedure as removal. (See Figure 3.) Insert o-ring into fi lter housing bore and
press fi lter element and housing into position as shown. (See Figure 4.) Install o-ring
into intermediate bore and o-ring on to counter bore at upper end of fi lter housing.
Assembly is now ready to receive air motor and housing assembly. If coupling half on
air motor shaft is removed, make certain coupling is relocated to correct position as
indicated dimensionally in Figure 5. Line up coupling jaws for engagement by using bolt
holes of castings as a reference. Rubber spider should be installed in lower coupling
half. Lower air motor and housing into place slowly to feel for correct coupling engage-
ment. When coupling is properly engaged, assembly can be pushed down by hand. DO
NOT FORCE ASSEMBLY TOGETHER WITH BOLTS. If air motor assembly is lifted
back up in attempting to engage blind coupling, make certain that o-ring on top end
of fi lter housing is still in position. If o-ring is out of position during this blind assembly,
air will by-pass the governor and over-speeding can occur. Fill with recommended oil
and run unit without pumping to check for possible oil leakage at shaft seal or o-ring
joints. Turn air supply on slowly to make certain that governor is operating properly.
WARRANTY
This unit is guaranteed for a period of fi ve years against defective material and
workmanship.
PERMANENT INSTALLATIONS
NOTE: As mentioned, the MSMA3-A pump does require that oil be in the reservoir
for bearing and motor lubrication. For permanent installations remove item 66, then
plug the hole with a
1 /
8
" pipe plug, part number 618-002-330. Fill the reservoir and
make sure that an in-line oiler (type oil as recommended) is used in the air supply to
the pump. Set lubricator at a usage rate of 1 pint (473 cc) every 50 hours. The motor
will then be lubricated by the in-line oiler and the bearing by the oil in the reservoir.
Figure 3
Figure 4
Figure 5
Figure 6 Spider insert.
msma3dl1sm-REV0109 Model MSMA3-A Page 2