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4. Approved lubricants:
CAUTION: Do not mix different brands of lubricants for
the same application.
Area to Lubricate Approved Lubricant or Equivalent
Bearings, Gear Joints
& Packing
ACG-2
(Dubois Chemical, Inc.)
4-26. Packing Installation
1. The standard packing set (22) consists of six braided
packing rings. Lantern ring halves (23) must be ordered
separately.
2. Install packing and lantern ring halves into the stuffing
box area of the suction housing (29) in the following
sequence:
a. Wipe a film of lubricant on each packing ring and
install two rings. Push each ring firmly in place.
Note: Install the packing rings with the splits staggered at
90 degrees to the adjacent ring of packing. On initial
assembly, one ring of packing may not fit in stuffing
box. This final ring of packing should be installed
after pump is started and packing is seated.
CAUTION: Always use a proper packing tamper tool to
install packing. Do not use a pointed or sharp
tool, as damage to the packing material 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 (H), packing gland halves
(21), and gland adjusting nuts (F). Tighten nuts finger tight at
this time.
4-27. 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 (28) on suction housing (29) and
install retaining ring (27) in groove on suction housing.
2. Slide turned diameter of suction housing into bore on
end of bearing housing (26). Align holes in clamp ring (28)
with four threaded holes in bearing housing (26) and thread
four hex head screws (0) with lock washers into threaded
holes. Tighten finger tight.
3. Rotate suction flange to desired position (if not already
fastened to piping) and tighten four hex head screws (0).
Note: Refer to Torque Guidelines Chart (page 12) for the
proper torque requirement for all threaded fasteners.
4-28. 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 before assembly.]
a. Press bearing cone on shaft (14), 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 (16) 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 (18) on shaft (14) and tighten until it
rests against the shoulder on the drive shaft. Install brass tip
set screw (17) in bearing nut and tighten.
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 (bearing
spacer halves held tightly in place and bearings do not
turn freely).
3. Remove bearing spacer halves (16). Thoroughly pack
lubricant around rollers and on bearing races. Install one
half of bearing spacer. Fill area between bearings half full of
lubricant, and install other half of bearing spacer.
Note: Assuming the bearings are not too hot, an alternate
method of lubricating bearings is as follows: Pack the
rollers of the first cone immediately after it is pressed
on shaft. Lubricate race of first cup before it is
installed. Place bearing spacer halves in place and fill
it 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 19) into
bearing cover plate (2) and bearing housing (26) with
Locktite. The lip of the radial grease seal (1) should be facing
outward with spring visible. The lip of the seal (19) should be
facing the bearings. The lips of both seals should be wiped
with grease.
5. Install drive shaft with bearings in bearing housing,
being careful to avoid damaging the grease seal (19).
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