moyno Version 3, Service Manual

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CAUTION: Always use a proper packing tamper tool to
install packing. Do not use a pointed or
sharp tool, as damage to the packing mate-
rial or drive shaft could result. To assure
proper shaft lubrication, never use a one-
piece spiral wrap packing.
b. Install the two lantern ring halves with the flat side
against the packing.
c. Install final four packing rings, firmly pushing each
ring into place.
3. Install packing gland studs (F), packing gland halves
(12), and gland adjusting nuts (E). Tighten nuts finger tight at
this time.
4-36. Bearing Housing/Suction Housing Assembly. This
procedure may be performed now or after the bearing)/drive
shaft assembly is installed in the bearing housing.
1. Place clamp ring (16) on suction housing (19) and
install retaining ring (15) in groove on suction housing.
2. Slide turned diameter of suction housing into bore on
end of bearing housing (14). Align holes in clamp ring (16)
with four threaded holes in bearing housing (14) and thread
four hex head screws (K) with lock washers into threaded
holes. Tighten finger tight.
3. Align suction flange to desired position (if not already
fastened to piping) and tighten four hex head screws (K).
Note: Refer to Torque Requirement Chart (page 13) for the
proper torque requirement for all threaded fasteners.
4-37. Bearing/Drive Shaft Assembly
1. Bearings must be pressed on the shaft in the following
sequence: [Larger units (G drive end and larger) require
heating of the bearings to 250
°
F for assembly.]
a. Press bearing cone on shaft (4), making sure rollers
face in proper direction to receive cup (step b). Cone should
be pressed firmly against shoulder on shaft.
b. Place cup on rollers.
c. Place bearing spacer (6) halves on cup.
d. Place second cup on spacers.
e. Press second bearing cone on shaft with rollers fac-
ing seat in cup. Cone should be pressed on until face of
cone is flush or even with shoulder on shaft.
CAUTION: Do not press second cone past shoulder
on shaft.
2. Thread bearing nut (8) on shaft (4) and tighten until it
rests against the shoulder on the drive shaft. Install brass tip
set screw (7) in bearing nut and tighten.
Page 9
Note: The tapered bearings are designed such that when
properly installed there may be a very slight end play
in the bearings (bearing spacer halves may slip freely
out of place) or they may have a slight pre-load (bear-
ing spacer halves held tightly in place and bearings
do not turn freely).
3. Remove bearing spacer halves (6). Thoroughly pack
lubricant around rollers and on bearing races. Install one half
of bearing spacer. Fill area between bearings half full of lu-
bricant, and install other half of bearing spacer.
Note: An alternate method of lubricating bearings is as fol-
lows: Pack the rollers of the first cone immediately af-
ter it is pressed on shaft. Lubricate face of first cup
before it is installed. Place bearing spacer halves in
place and fill half full of lubricant. Lubricate race of
second bearing cup and place on spacer. Pack rollers
of second cone with lubricant, and press on shaft until
flush with shoulder.
Note: If too much grease is packed into the bearings during
assembly, it may seep from the grease seals during
the first few hours of operation until the proper lubri-
cant level is achieved. This lubricant should be wiped
from the seal area, when the pump is not operating, to
prevent contaminants from collecting in the seal area.
4. Install (light press) grease lip seals (1 and 9) into bear-
ing cover plate (2) and bearing housing (14). The lip of the
seals should be facing out, and lips of seal should be wiped
with lubricant.
5. Install drive shaft with bearings in bearing housing, be-
ing careful to avoid damaging the grease seal (9). Slide
slinger ring (11) over drive shaft.
6. Place O-ring (3) on bearing cover plate and bolt bear-
ing cover plate to bearing housing using six hex head screws
(A) and lock washers. The six screws should be tightened
evenly, and care should be taken to insure the 0-ring be-
comes seated in the step in the bearing housing. When the
bearing cover plate is fully secured to the bearing housing, a
small gap of 0.010 to 0.020 inch will exist between the bear-
ing cover plate and the bearing housing.
4-38. Rotor/Stator Assembly
1. Slide head ring (39) and O-ring (38) over rotor (37)
contour to the rotor head. The side of the head ring with the
smallest diameter holes should be facing the rotor head.
Note: On some models the head ring is a two-piece com-
ponent which eliminates this step.
2. Slide stator clamp rings (40) on both ends of the stator
(44) and secure in position with retaining rings (43).
3. Coat the rotor (37) contour with waterless hand
cleaner, glycol or other lubricant compatible with the stator
elastomer. Insert rotor into stator so that rotor head is at the
specified distance from the end of the stator (Dimension “A,”
fig. 4-5).
Note: Turning the rotor counterclockwise while inserting
into stator will ease assembly.