Maintenance Waukesha Cherry-Burrell
®
Brand C-Series Pump
01/2019 95-03008-IEC Page 49
Type “DG” Seal
The “DG” Seal uses the type “D” rotating seal components and
incorporates a replaceable, clamped-in stationary seal seat.
NOTE: The C-100 is not available with “DG” or “E” seals.
Disassembly
1. Shut off the product flow to the pump and relieve any product
pressure.
2. Shut off and lock out power to the pump.
3. Disconnect the suction and dischar
ge pipe fittings.
4. Using a wrench, remove the guard assembly.
5. Loosen the casing clamp wing nut. While holding the pump
c
asing, remove the clamp.
6. Remove the casing and inspect the clamps and the casing for
d
amage or wear. Replace if necessary.
7. Remove the impeller and the backplate (See page 21 for pin
impeller design or page 33 for the sealed impeller design.)
NOTE: T
ake care to protect the sealing face and edges of the
backplate from nicks and scratches.
8. Pull the inboard rotary seal (item 80), O-ring (80B), seal cup
(
80A) and spring (80C) straight off the stub shaft to remove
them.
9. Carefully inspect the O-ring and the inboard rotary seal for
sign
s of abrasion, cuts, or other wear that could cause leak-
age.
NOTE: The inboard rotary seal (item 80) is available in TC, SC,
and carbon. To measure wear on the carbon inboard rotary seal
only: when the extension end of the carbon seal is less than 1/32"
(0,79 mm) (see Figure 119, item A), replace the carbon seal.
10. Remove four nuts and washers off the backplate to release
the
gland ring, seal seat and PTFE gaskets (see Figure 120).
Examine them for signs of abrasion, cuts or other wear that
cou
ld cause leakage and replace as required.
Items in Figure 118:
11H
17J
17K
17L
17M
17N
80
80A
80B
80C
80N
80P
80R
Backplate
Gland Ring
Stud
Pin (on backplate, not shown)
Lock washer
Nut
Inboard Rotary Seal
Seal Cup
O-ring
Spring
Inboard Stationary Seal
PTFE Gasket - Outboard (thin)
PTFE Gasket - Inboard (thick)
NOTE: A larger exploded view of the
“DG” Seal with parts list is on page 72.
The pump contains internal moving
parts. DO NOT put hands or fingers into
the pump body ports or drive area at
any time during operation. To avoid
serious injury, DO NOT install, clean,
service, or repair pump unless all power
is off and locked out and the pump is
de-pressurized.
To avoid serious injury, shut off and
drain product from the pump prior to
disconnecting the piping.
Figure 118 - “DG” Seal exploded view
Figure 119 - Carbon Seal
Measurements
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