REPLACEMENT OF PARTS
DODGE is prepared to repair Screw Conveyor Drive
sped reducers for customers who do not have the proper
facilities or for those who desire factory service.
However, if the customer has access to an arbor press,
equipment for heating and shrinking bearings and gears
on shafts, and the tools normally found in a maintenance
department, the Screw Conveyor Drive speed reducer
can easily be disassembled and reassembled by careful
attention to the following instructions.
introduction of dirt into the bearings and other parts of
the reducer. The oil seals are of the rubbing type and
disassembly or reassembly to avoid damage to the
surfaces on which the seals rub. Any sharp edges on
the input shaft or output hub should be covered with
adhesive tape or paper before performing any work on
the unit. Nicks and burrs on surfaces of the input shaft
or output hub should be removed
When ordering parts, specify Screw Conveyor Drive
size and serial number, part name, part number and
Parts that must be pressed from shafts or output hub
should be removed before ordering parts. This assures
that those parts, if damaged during pressing operation,
will be replaced.
It is recommended that when a pinion or gear is
replaced, its mating gear or pinion be replaced also.
This ensures that the gear teeth will mesh properly. If
the large gear on the output hub must be replaced, it is
suggested that an output hub assembly, consisting of a
gear assembled on an output hub, be ordered to secure
an output hub with undamaged surfaces on which the oil
seals rub. However, if the old output hub is to be used,
carefully press the gear and bearing cones off.
Thoroughly examine the area under the oil seals for
scratches or any other damage resulting from the
pressing operation. To prevent oil leakage at the oil
seals, the rubbing area must be smooth.
Replacements for the old oil seals should be
ordered, due to the probability of these parts being
damaged during disassembly.
If replacing a bearing, output hub or a shaft, it is
advisable to order a set of shims for adjustment of
bearings on the shaft assembly. If replacing a housing, a
set of shims should be ordered for each shaft assembly
because the adjustment of the bearings on each shaft
assembly is affected.
REMOVING SCREW CONVEYOR DRIVE FROM THE
WARNING To ensure that drive is not unexpectedly
started, turn off and lock out or tag power source
before proceeding. Failure to observe these
precautions could result in bodily injury.
WARNING Equipment being removed may be too
heavy to control manually. Support it by external
means. Failure to observe these precautions could
result in bodily injury.
Disconnect any electrical power to the drive. Drain
lubricant from reducer. Uncouple drive shaft and screw.
Remove nuts from trough end studs. Support drive by
means of hoist and carefully pull unit away from trough
end to slide drive shaft out of screw.
Remove motor from motor mount. Remove retainer
bolt, lockwasher and shaft retainer from drive shaft.
Pull drive shaft out of reducer from adapter side.
Position reducer on its side and remove all bolts.
Gently tap the output hub and input shaft with a soft
hammer (rawhide not lead hammer) to separate the
housing halves. Open housing evenly to prevent
damage to the parts inside.
Lift shaft, gear and bearing assemblies from
Remove seals, seal carriers and bearing cups from
Clean all parts in solvent, inspect for damage and
coat with oil.
WARNING: Solvents can be toxic and/or flammable.
Follow manufacturers safety procedures and
directions. Failure to observe these precautions
could result In bodily injury.
Output Hub Assembly: Heat gear to 3250 to 350°F
for shrinking onto output hub. Heat bearing cones to
2500 to 270°F for shrinking onto output hub.
Countershaft Assembly: Heat gear to 3250 to
350°F and bearing cones to 2500 to 270°F for
shrinking onto shaft.
Input Shaft Assembly: Shaft and pinion are
integral. Heat bearing cones to 2500 to 270°F for
shrinking onto shaft.
Drive the dowel pins back into position in the right-
hand housing half.
Install countershaft cover in right-handed housing
half. Place housing half on blocks to allow for
protruding end of output hub. Install bearing cups in
right-hand housing half making sure they are
Mesh output hub gear and small countershaft gear
together and set in place in housing. Set input shaft
assembly in place in the housing. Make sure
bearing rollers (cones) are properly seated in their
cups. Set bearing cups for left-hand housing half in
place on their rollers.
Clean housing flange surfaces on both halves,
making sure not to nick or scratch flange face.
Place a new bead of gasket eliminator on flange face
and spread evenly over entire flange leaving no bare
spots. Place other housing half into position and tap
with a soft hammer (rawhide not lead hammer) until
housing bolts can be used or draw housing halves
together. Torque housing bolts per torque values
listed in Table 4.
CAUTION If too much sealant is used, it will run into
the bearing, and too little sealant will result in an