H.5 – PUMP REASSEMBLY, SEE FIGURES 3 through 8
NOTE:
Prior to pump assembly, all parts should be cleaned and inspected for nicks, burrs or
gouges. When ready for assembly, wipe all parts, including bolts, O-rings and seal faces
with clean, lubricating oil or pumped product, if applicable.
CAUTION
ATTENTION
Bearing service life could be significantly reduced if bearing is pushed on by its
outer race
.
1.
Install ball bearing
(11)
onto shaft (7) using an arbor press and sleeve by pushing on ball bearing (11)
inner race
only
until ball bearing (11) is positioned against shoulder on power rotor (7).
2.
Install retaining ring (15) in groove in power rotor (7).
3.
Before installing seal (16), insure power rotor (7) shaft is clean and has no burrs or sharp edges.
4.
If pump has a lip seal (16), install lip seal into outboard cover (4) and skip to step 8 below.
NOTE: Seal Lip is graphite impregnated Teflon and should not be lubricated when installed.
5.
If pump has a mechanical seal (16), apply clean lubricating oil to rotor shaft at seal diameter.
a. If seal has elastomeric rubber bellows, (see figure 1)
, apply light film of oil to bore of bellows
and install rotating assembly (3) on power rotor (7) shaft with a twisting motion by pushing on seal
retainer
only
with fingers. Do not touch carbon face with fingers. Clean carbon face of seal with
alcohol and lint free cloth. Apply light film of clean lubricating oil to carbon face.
b. If seal is metal bellows type, (see figure 2)
, apply a light film of oil to rotating seat O-ring of seal
and slide rotating assembly (3) on power rotor shaft (7). For 95 sizes only, be sure slots in rotating
assembly (3) line up with seal return hole in power rotor shaft). Tighten setscrew (3F). Do not
touch carbon seal face with fingers. Clean carbon face of seal with alcohol and lint free cloth.
Apply light film of clean lubricating oil to carbon face.
6.
Apply light film of clean lubricating oil on seat and O-ring of stationary seat (3B) of mechanical seal
(16). Install stationary seat (3B) into bore in inboard cover (4) with fingers (do not touch seal face with
any tools) so slot in face of seal is facing into inboard cover (4). Be sure stationary seat (3B) is all the
way to bottom of bore in inboard cover (4) and slot in seal mates up to pin (95) in inboard cover (4).
7.
Clean stationary seat of mechanical seal (16) in inboard cover (4) with alcohol and soft, lint free cloth,
and apply light film of clean lubricating oil to carbon face.
8.
Mesh the two idler rotors (8) and power rotor (7) together into a rotor assembly making sure idler
rotors and balance piston are properly engaged.
9. Install
rotors
by positioning pump housing in a vertical position and sliding rotor assembly into housing
bore (1) until ball bearing (11) bottoms out in housing bore.
10. Install O-ring (31) in groove in inboard cover (4).
11. If pump has lip seal (16), install seal installation tool (see figure 8) on coupling end of power rotor (7).
Then, carefully install inboard cover (4) on housing being sure that inboard cover (4) is kept square
with power rotor shaft and inner lip seal lip (16) does not roll under as cover (4) is installed.
CAUTION
ATTENTION
Failure to use seal installation tool (See Figure8) on lip seal units is likely to result in
improper lip seal installation.
6
