15-600 Page 16
SECTION 3
ROUTINE MAINTENANCE & SERVICE INSTRUCTIONS
Remove hood and crosshead inspection plates for
access to working parts. Before working on inside of
crankcase, it is necessary to drain the oil. Lube oil
pump mounting brackets and piping connections are
below the oil level.
Mark all parts during dismantling so they can be
returned to their original position during reassembly.
It is highly recommended that pump be removed to a
machine shop if major work is to be done on power
end.
FIGURE 11 – JACKSHAFT BEARING INSTALLATION
JACKSHAFT
- To remove the jackshaft, it is
necessary to remove all sheaves from the jackshaft.
Then remove bearing end plates and bearing housings
from both sides of pump. Support each end of
jackshaft while removing bearing housings. The
jackshaft can be moved horizontally until the pinion
teeth clear the teeth of the eccentric gear. The
jackshaft can now be removed from either side of the
pump.
The jackshaft bearings are of the straight roller type
with roller and cage assembly held in the flanged outer
race. The inner race is not flanged. The outer race and
roller assembly will slide over the inner race which
remains on the jackshaft. Both bearings are identical.
The straight roller bearings permit the jackshaft to float
endwise. Thrust loads are carried on the spherical
main bearings. Main bearings will be covered as a
separate item.
The safest way to remove the inner race of the
jackshaft bearing from the shaft is by the careful use of
heat. Do not overheat to the point where race is
discolored. Be careful not to damage the bearing
spacer ring between the inner race and the shoulder
on the shaft.
If the jackshaft bearing is to be replaced, the outer
race and roller assembly can be driven or pressed out
of the bearing housing.
The jackshaft bearings should be replaced if any of the
rollers or races shows damage or if they are
excessively worn. A noisy bearing indicates bearing
damage, requiring replacement. Check clearances by
inserting feeler gauge between the roller and inner
race with bearing assembled on the shaft and in the
housing. This check can be made with the bearing
temporarily assembled out of the pump, but with inner
race on jackshaft. See recommended running
clearances on pages 28, 29, or 30.
To mount the new bearings, heat the inner race in oil
to about 300º F (148.8º C) and slip it in on the shaft
against the bearing spacer ring. Be certain the spacer
ring is in place with the chamfered end of the bore over
the large fillet on the jackshaft. The inner race and the
spacer are to be assembled snugly against the shaft
shoulder. The shaft can be reinstalled in the frame.
To mount a new oil seal wear sleeve, heat the sleeve
in oil to about 300º
F (148.8º
C) and slip it on the shaft.
See FIGURE 13, page 17.
FIGURE 12 – JACKSHAFT REMOVAL/INSTALLATION FIXTURE
