TABLE 2
Reducer Size
Ratio
Changes Required
B
6.27 to 1
Snap ring for pinion and shaft
7.65 to 1
Two spacers (A larger O.D. than is
used on other ratios) and gear shaft
C
7.95 to 1
Gear shaft and a longer key,
also a snap ring
OPERATION
After the first few hours of operation, inspect reducer for leaks.
If leakage between gear case and cover cannot be stopped
by tightening of nuts or capscrews, the gasket should be
replaced. Leakage around either shaft indicates a damaged lip
seal which should be replaced.
The operating temperature on the outside of the reducer
case, after a few hours operation, should not be more than
approximately 75°F higher than surrounding air temperature.
The oil within the Reducer should never exceed 200°F.
GEAR RATIOS
Four different gear ratios are available for the A size Reducers.
Eight ratios are available for B size reducers and seven ratios
for C size reducers. Complete reducers within a size may be
interchanged on a Viking pump unit to obtain desired pump
speeds and capacities.
Gear ratios may be changed in all reducers within each size
by selecting the proper pinion and gear of a common ratio.
A pinion from one ratio cannot be used with a gear from a
different ratio. Certain B and C reducers require additional or
different parts besides the pinion and gear to make the ratio
change. See
"Table 2" on page 3
for changes required.
When changing the reducer ratio, the nameplate should also
be changed to new ratio reducer part number. After making
any output or input speed change (complete reducer or
gear ratio changes), a check should be made to ensure the
couplings are of sufficient size for the conditions which reducer
will be operating. For ratios available refer to
"Model Number
Chart" on page 1
, Catalog Section or contact your Viking
Pump
®
representative.
⚠
DANGER !
Before opening any Viking pump liquid chamber
(pumping chamber, reservoir, relief valve adjusting cap
fitting, etc.) be sure:
1. That any pressure in the chamber has been
completely vented through the suction or discharge
lines, or other appropriate openings or connections.
2.
That the driving means (motor, turbine, engine, etc.)
has been “locked out” or made non-operational, so that
it cannot be started while work is being done on pump.
3. That you know what liquid the pump has been handling
and the precautions necessary to safely handle the
liquid. Obtain a material safety data sheet (MSDS) for
the liquid to be sure these precautions are understood.
Failure to follow above listed precautionary measures
may result in serious injury or death.
DISASSEMBLY
Before starting disassembly, study the exploded view (see
"Figure 6" on page 4
,
"Figure 7" on page 5
or
"Figure 8" on page 6
) for the particular size reducer that
is being disassembled to help determine parts relationship.
The parts are indexed in a logical sequence of disassembly
and will prove to be a valuable aid in dismantling the reducer.
1.
Disconnect the couplings and remove the capscrews
holding the mounting bracket to the base. Remove the
coupling halves and bracket from the reducer.
2.
Remove the breather and drain plugs. Drain all lubricant
from the reducer.
3.
Remove the capscrews from the gear case halves.
4.
Tap firmly and alternately on the gear shaft and pinion
shaft. This will separate the reducer halves.
5.
With two screwdrivers at opposite sides, carefully pry the
reducer cover loose from internal ball bearings.
DO NOT FORCE.
Be careful not to damage the gasket or gasket surface.
6.
Grasp the pinion and gear shafts and pull both assemblies
simultaneously from the case or cover.
7.
Use a conventional gear or bearing puller to remover the
bearing from gear shaft. Remove the beveled spacer on B
and C size reducers. Press the shaft from the gear.
8.
Use a puller and remove bearings from the pinion shaft.
Remove the spacer from B size 7.65 to 1 ratio from the
pinion shaft.
9.
Remove the lip seals from the gear case halves (cover
and case) only if they show signs of deterioration or
damage. Lip seals must be pressed or driven out from the
inside of gear case and cover on B and C reducers. A size
reducer may have lip seals pressed in or out from either
side of gear case half.
FIGURE 5
NOTE: UNIT FURNISHED WITH COUPLING GUARDS
AS STANDARD
High Speed
Coupling
Helical Reducer
Low Speed
Coupling
Bracket
Pump
Motor
Baseplate
TSM 1984 | Issue A | Page 3 of 8
© 2019 Viking Pump, Inc. • Cedar Falls, IA
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
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© Viking Pump, Inc.
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© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
© Viking Pump, Inc.
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