FMC Corporation - Talstar FMC L06 - Manual (Page 52)

Doc No: OMM50000903
Rev: B Page 52 of 65
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22. To replace the tapered roller bearings on the crankshaft, heat the cones to a
maximum of 300
°
F (149
°
C). Slide them down the shaft unit they are full seated
against shoulder. The hot cone may pull away from the shoulder unless it is held
in position until it cools enough to grab the shaft. Use a .001” thick feeler gauge
to insure the cone is fully seated against the shoulder after parts have cooled.
23. Use a press to seat the new cups (23) into the bearing housings. Never use new
bearing cones with old bearing cups. Always use matched sets from one
manufacturer.
24. Reassemble the crosshead assemblies and connecting rods. Insure that the set
screws (27) retaining the wrist pin (6) are in place (if they were removed for repair
or inspection of the wrist pin bushing). The set screw must engage the flat on the
wrist pin. Refer to Section 10.0 for torque specifications.
25. Push the crosshead/connecting rod assemblies fully forward in power frame to
provide maximum clearance for the crankshaft. Insure crosshead assemblies are
replaced in the same orientation and in the same cylinder bore they were
originally.
NOTE: The oil cup pocket feeding lubricant to the wrist pin bushing
is on the top of the connecting rod and should be in the up
position.
26. Install crankshaft in the power frame. Take care not to scratch bearing surfaces
of the crankshaft.
27. Inspect the o-ring or gasket (14) that seals the bearing housing and replace if
damaged. Reinstall the shims (13) and bearing housings. As a starting point,
install the same number of shims that the pump originally had prior to service
work. When tightening the fasteners retaining the bearing cover, use crisscross
pattern for tightening with a torque wrench.
28. Replace the rod bearings (5) in the connecting rod and connecting rod caps.
Insure that rod caps are properly assembled with their mating connecting rod.
Torque the fasteners holding the end caps to the mating rod per the values given
in Fastener Torque Requirements, Section 11.0 of this manual. Use back and
forth pattern tightening with a torque wrench. After the cap screws are torqued, a
light strike to the cap with a rubber hammer will help properly seat the rod
bearings.
29. A dial indicator must be used to properly adjust the endplay of the crankshaft.
Improper adjustment may result in excessive temperature, noise, and reduced
bearing life. FMC recommends between .002” tight to .003” loose of internal axial
clearance (end play) when properly assembled. The final adjustment must be
verified using a dial indicator as indicated in the following steps 30 through 34.
30. Turn the crankshaft (2) more than two revolutions to insure the connecting rods
(4) are loose and that there is no binding in the rod bearings (5); the wrist pin (6)
joints are free; and the crossheads move freely in the power frame (1).