Maintenance
Waukesha Cherry-Burrell
Page 56
95-03057
11/2012
Mechanical Seal
Maintenance
The mechanical seals on the Votator II are the same on both the
non-driven and driven ends of the unit. The O-rings and seal
materials have been selected for the product specifications.
Various options are shown in the Parts Lists starting on page 63.
Single Mechanical Seal
Units furnished before 2005 were installed with either a single or
double mechanical seal configuration. For detailed parts drawing
breakdown see “Single Mechanical Seal” on page 72.
Seal Head Insert Removal and Installation
The Seal Head Insert located in the product head is removed by
tapping the back of the seal with a plastic block or rod. Make sure
to hold the insert or use a soft cloth to catch it to prevent it from
dropping when removed.
NOTE:
To prevent damage to the seal face do not place the seal
face down on any surface during maintenance.
If the mechanical seal is going to be flushed, the springs in the lip
seal should be removed to protect the stub ends on the mutator
shaft. Install the seal in the relief position as shown in Figure 54.
To install a new insert, lubricate the o-rings and the inside bore.
Insert in the head with an even distribution of force on the face.
The face must be protected with plastic to avoid damage.
Seal Body Insert (Rotating Seal Face) Used Before
2012
The rotating seal face is referred to as the Seal Body Insert. This
part is designed to wear at a greater frequency than the seal
head insert. An O-ring holds the insert stationary in the seal body.
NOTE:
Do not use a lubricant on the Seal Body Insert O-ring
because the insert must remain stationary with respect to the
body. If necessary, water can be used as a lubricant.
The seal insert is symmetrical and can be reversed if one side
becomes scratched.
The seal body is held in place on the mutator shaft by two seal
drive pins. Each one should be 3/32 inches (+/-0.015) above the
stub shaft surface. It is extremely important that these pins are
not rounded on the edges and this dimension is maintained. If the
pins are higher than 3/32", the seal will jam; if the pins are too
low, the body will rotate. See Figure 57.
Install the Seal Body Insert in the Seal Body as follows:
1.
Place O-ring in Seal Body.
2.
Push Seal Body Insert down evenly with both hands until it
bottoms out. See Figure 55.
Figure 53 - Seal Head Insert Removal
Figure 54 - Lip Seal Orientation
Figure 55 - Press Insert Down Evenly
with Both Hands
