Waukesha 200 series Operation And Maintenance Manual - page 16
Waukesha Cherry-Burrell
Maintenance
Issued: January 2003
95-03074
Page 17
Revised: June 2005
Type 4 Seal Disassembly
1.
Remove cap screws from seal housing. (Figure 19,
item A).
2.
Carefully lift off seat retainer, o-ring, L-gasket,
stationary seal and flush housing (Figure 18, items P,
R, T, S and U).
3.
Loosen set screws (2) in spring retainer. (Figure 18,
items W and H).
4.
Lift off rotating seal components:
Rotary Seal (Figure 18, item L)
O-ring (Figure 18, item F)
Washer (Figure 18, item K)
Spring Retainer (Figure 18, item H)
Springs (6 springs: 3 up, 3 down) (Figure 18, item J)
Washer (Figure 18, item G)
5.
Use backplate to slide rotary seal up impeller shaft
approximately 1-1/2 inches (Figure 20).
6.
With backplate resting on impeller, push rotary seal
toward backplate until o-ring is free (Figure 21).
7.
Pull stationary seal and L-gasket out of backplate
(Figure 18, items C and D).
NOTE: The stationary seal is brittle. Prying or
hammering on seal plate can shatter seal. If stationary
seal cannot be removed by hand, place 2-1/4 inch
diameter plastic or wood rod on impeller side of seal and
apply even pressure to dislodge.
Inspecting Parts
•
Examine all seal surfaces and replace scratched,
cracked and/or braised seals.
•
Inspect all o-rings and o-ring seats for abrasions, cuts
or other wear potentially causing leakage.
•
Clean all seal areas and alignment surfaces.
NOTE: Stationary seals are reversible. Use both sides
before replacing.
NOTE: Replace rotary seal when seal face extends less
than 1/32 inch (1mm) from body (Figure 22).
Figure 18 - Type 4 Seal Components
Figure 19 - Remove Screws from Housing
Figure 20 - Move Rotary Seal Up Shaft
Figure 21 - Push Rotary Seal Down Releasing O-ring
Figure 22 - Replace Rotary Seal if Less than Minimum