Waukesha Cherry-Burrell
Maintenance
11/2012
95-03057
Page 39
CAUTION:
Failing to use the
Head Removal tool can result in
damage to the seal face. Use of
the HRT prevents chipping the
stationary seal face on the end of
the shaft during removal or
replacement of the head.
8.
Insert the Head Removal Tool (HRT) through the bearing and
into the threaded end of the shaft, then slide the head over
the tool so that the seal face is past the end of the shaft.
Grasp the end of the tool and the head and carry it to a table
or other stable work surface for further maintenance if
needed.
9.
Insert plastic shaft skid in unit, install on top and rotate shaft
so skid is under shaft. Remove both shaft and skid from unit.
Place on a table or cradle.
10. Remove product head on drive end (if required) by removing
the shaft guard held in place by four bolts. Rotate the head
counter-clockwise to disengage. Check the condition of the o-
ring in the head before reinstalling.
11. The mechanical seals are the same on top and bottom, and if
servicing is required:
•
Remove the keeper o-ring and all seal components, seal
body with seal ring, backing ring, u-cup and wavy spring.
If it is a double mechanical seal, the secondary seal and
spring must be removed before disassembling the
primary seal.
•
Inspect o-rings and seal faces for scratches or cracks. If
the seal parts require replacement, refer to pages 56 and
72 or pages 57 and 70.
•
When assembling the
single mechanical seal
, place the
wave spring on the shaft, followed by the seal backing
ring and the u-cup with the opening of the cup facing the
body of the shaft. Position the seal body and install the
keeper o-ring.
•
When assembling the
double mechanical seal
, place
the wave spring on the shaft and then the seal body with
o-ring. Position the seal body and install the keeper o-
ring, followed by the secondary seal and wave spring.
•
Check all seal assemblies to verify that they are locked in
position by the drive pins and that they can be easily
compressed.
12. Inspect the condition of the scraper blades and replace if
necessary. Install the new blades while the shaft is on the
cradle or table, attaching two rows of scraper blades on the
top of the mutator, and place the shaft skid over the blades.
Turn the mutator and shaft skid over so that the skid is on
bottom of the table or cradle, and install the other two rows of
blades on top.
Blades are always installed with the flat
side up.
13. Apply anti-seize compound to the drive end splines and the
next 3 inches of stub shaft length.
14. Use the shaft skid to slide the mutator in the heat exchanger
cylinder and lift up the mutator slightly to remove the shaft
skid.
15. Check the condition of the O-ring in the product head and
lubricate it lightly. Replace the bearing in the product head if
necessary.
The grease ring on the bearing should be
facing the product side of the head.
Insert the HRT into the
