Maintenance
Waukesha Cherry-Burrell
Page 42
95-03057
11/2012
Shafts
All shaft surfaces, especially in seal and bearing areas, should be
kept smooth and clean. Special care should be taken while
cleaning and maintaining seals and bearings to assure that these
areas of the shaft are not scratched or damaged.
Shaft porosity can be detected by making an adaptor for the
threaded end of the shaft and pressurizing it with air. Pinholes will
be detected as air bubbles by submersing the shaft in a water
bath. Leaky shafts can be repaired at WCB.
Bent or imbalanced shafts will cause premature bearing, seal and
blade wear and may damage tube walls. Shafts should be
checked for straightness and balance annually.
Gear Drive
Table 6: Lubrication Quantities
NORD
gearbox
Orientation
Quantity
SK 4282
Horizontal
4.97 qt.
Vertical
5.71 qt.
SK 5282
Horizontal
7.93 qt.
Vertical
9.30 qt.
Manufacturer recommendations should be followed for gear oil
replacement. When draining oil, examine closely for foreign
matter or debris, flushing or gear replacement may be required.
NOTE: Consult the sticker on the NORD gearbox to verify the
correct lubricant.
The current standard lubricant for the NORD gearbox is
Mobil
SHC Cibus™ 220
. For alternates, see NORD document U11000.
For quantities (fill capacity for an empty gearbox), see Table 6.
The gearbox (SK 4282 or SK 5282) is indicated on the
identification plate.
Blades
Blades that have developed a heel greater than WCB
specifications should be sharpened per instructions in this
manual. Blades worn beyond the minimum sharpening
dimensions should be replaced. Worn blades reduce heat
transfer, result in poor performance and may damage product
tubes. See “Scraper Blade Maintenance” on page 45.
Mechanical Seals
Votator II heat exchangers are equipped with single or double
mechanical seals at each end of the mutator shaft.
NOTE:
Double mechanical seals MUST BE flushed to prevent
seal faces from over heating.
Mechanical seal faces with nicks, blisters, grooves, or any
abnormality on the seal face, must be replaced. Elastomers that
are brittle, deformed, cut, or have any abnormality must be
replaced. It is an excellent practice to replace all elastomers and
gaskets whenever maintenance is performed.
Tubes
A frequent cause of tube wall damage is careless handling when
removing or installing the mutator shaft. The shaft trough skid
should always be used when removing or installing the mutator
shaft in the Horizontal Votator II (or the Vertical unit if in a
horizontal position) to prevent the blade mounting pins from
scoring and damaging the tube wall.
A common way to damage tube ends is to bang or drop the shaft
journals when removing or inserting the shaft.
Tubes should be examined for wear anytime the shaft is removed
or at least once every 3 months. Chrome plated tubes should be
