PA SERIES
OM−06078
MAINTENANCE & REPAIR
PAGE E − 18
Lubricate the bearings as indicated in
LUBRICA-
TION
.
Pump Frame and Drive Assembly Installation
(Figure 5)
Apply two drops of Loctite Threadlocker No. 242"
or equivalent compound to the shaft key (5) and
install it in the shaft keyway. Position the flexible
portion of the coupling assembly (2) on the shaft
with the socket head capscrews positioned
to-
ward the pump
. Align the keyway in the hub of the
coupling assembly with the shaft key and slide the
coupling onto the shaft to the dimension shown in
Figure 5.
Make certain that the flexible portion of the
coupling is mounted as shown in Figure 5.
This is critical.
If the coupling is not prop-
erly positioned on the shaft, the coupling
parts may not fully engage, or a pre-load
condition can cause premature bearing
failure.
The end of the shaft must be recessed
0.50 inch (12,4 mm) from the face of the
bushing.
This will allow the two portions of
the coupling to fully engage when the en-
gine bracket is secured to the engine bell-
housing without pre-loading the bearings.
With the flexible portion of the coupling properly
positioned on the shaft, secure the coupling to the
shaft by torquing the hub setscrew to 29 ft. lbs.
(348 in. lbs. or 4 m. kg.).
If the complete coupling assembly is being re-
placed, apply ‘Loctite Retaining Compound No.
242’ or equivalent to the threads of the hardware (3
and 4) and secure the outer ring of the coupling to
the engine flywheel by torquing the hardware to 45
ft. lbs. (540 in. lbs. or 6,2 m. kg.).
Using a suitable lifting device, position the pump
frame so the flexible portion of the coupling seats
inside the outer ring attached to the engine fly-
wheel.
NOTE
To ease installation,
lightly
lubricate the rubber por-
tion of the coupling with a
non-petroleum based
lubricant
such as vegetable oil or glycerin, or a sili-
con-based lubricant such as WD40" or equivalent.
Do not
use petroleum-based lubricants, or any oth-
er substance which may soften or otherwise dam-
age the rubber.
Secure the engine bracket to the engine bellhous-
ing with the hardware (6 and 7).
Seal Reassembly and Installation
(Figures 4 and 8)
Clean the bore of the back plate (6) and the shaft
(24) with a cloth soaked in fresh cleaning solvent.
Most cleaning solvents are toxic and
flammable. Use them only in a well ven-
tilated area free from excessive heat,
sparks, and flame. Read and follow all
precautions printed on solvent contain-
ers.
Lay the back plate on a flat surface with the impeller
side down. Install the spring (9) in the lip seal (8).
Press the lip seal into the back plate with the lip
positioned as shown in Figure 4.
The seal (3) is not normally reused because wear
patterns on the finished faces cannot be realigned
during reassembly. This could result in premature
failure. If necessary to reuse an old seal in an emer-
gency,
carefully
wash all metallic parts in fresh
cleaning solvent and allow to dry thoroughly.
Handle the seal parts with extreme care to prevent
damage. Be careful not to contaminate precision
finished faces; even fingerprints on the faces can
shorten seal life. If necessary, clean the faces with a
non-oil based solvent and a clean, lint-free tissue.
Wipe
lightly
in a concentric pattern to avoid
scratching the faces.
Inspect the seal components for wear, scoring,
grooves, and other damage that might cause leak-
age. Clean and polish the shaft sleeve, or replace it
if there are nicks or cuts on either end. If any com-
Содержание PA4C60-4045H
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Страница 26: ...OM 06078 PA SERIES MAINTENANCE REPAIR PAGE E 6 SECTION DRAWING Figure 3 PA4C60 SAE 4 10 Pump End Assembly...
Страница 28: ...OM 06078 PA SERIES MAINTENANCE REPAIR PAGE E 8 SECTION DRAWING Figure 4 Pump Assembly...