Viking Pump TSM212: H-LL 724/4724 - Manual (Page 5)

SECTION TSM 212 ISSUE F PAGE 5 OF 9
SHAfT
LIPSEAL
STEAM JACKETED
AREA
HEAD
IDLER
IDLER PIN
SEAL
ROTATINg
MEMBER
STEAM JACKETED
HEAD PLATE
ROTOR
SEAL
STATIONARY MEMBER
CASINg
BRACKET
CASINg BUSHINg
BEARINg
HOUSINg
DISASSEMBLY
fIgURE 4
1. Remove the head from the pump.
CAUTION: DO NOT ALLOW THE IDLER TO fALL
fROM THE IDLER PIN. Tilting the head up as it is
removed will prevent this occurrence. Avoid damaging
the head gasket if possible. If pump is furnished with
a relief valve it need not be removed from head or
disassembled at this point. (See page 6 for PRESSURE
RELIEf VALVE INSTRUCTIONS). If the pump has a
steam jacket head plate, this plate will separate from
the head when the head is removed from the pump. The
compression O-ring between the head and the jacket
head plate should be removed and the gasket surfaces
on the above parts cleaned.
Note: These pumps also have a steam jacket feature
incorporated into the casing and bracket assembly. To
avoid destroying the sealing on this steam jacket the
casing should not be removed from the mounting bracket
when the pump is disassembled for maintenance.
If the pump is equipped with a jacketed head plate,
disassembly will probably require replacement of the
O-ring between the pump head and jacket head plate.
These O-rings should be carried as spare parts for
pumps thus equipped.
2. Remove the idler and bushing assembly from the idler
pin. Replace all excessively worn parts. See CAUTION
about replacement of carbon bushings in Step 12.
3. NOTE: A piece of wood or brass inserted between the
rotor teeth and into the casing port will prevent the shaft
from turning. Bend up tang on lockwasher and, using a
spanner wrench, remove the lockwasher and locknut.
4. Loosen packing gland nuts on series 724 pumps. Drive
the shaft forward approximately 0.5 inch and inspect for
presence of a pair of half round rings under the inner
bearing spacer collar (K-LL only). If present, these rings
must be removed before the rotor and shaft can be
removed from the pump.
5. Carefully remove the rotor and shaft assembly from the
pump. NOTE: Avoid damaging the bracket bushing.
The rotary portion of the mechanical seal will usually
come out with the shaft on series 4724 pumps. Remove
the stationary seal seat from the bracket counterbore.
Replace rotor and shaft assembly if excessively worn.
O-RINgS