ABB Dodge SCXT105 Talimatlar Kılavuzu - Sayfa 7

DC Sürücüler ABB Dodge SCXT105 için çevrimiçi göz atın veya pdf Talimatlar Kılavuzu indirin. ABB Dodge SCXT105 16 sayfaları. Screw conveyor and hydroil screw conveyor drive

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REPLACEMENT OF PARTS

Dodge is prepared to repair Screw Conveyor Drive speed

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.

Cleanliness is very important to prevent the introduction of

dirt into the bearings and other parts of the reducer. The oil

seals are of the rubbing type and considerable care should be

exercised during disassembly or reassembly to avoid damage

to the surfaces on which these 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 or the input shaft or output hub should

be removed.

ORDERING PARTS:

When ordering parts for reducer, specify Screw Conveyor Drive

size and serial number, part name, part number, and quantity.

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, the

mating gear or pinion be replaced also. This insures 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

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

TROUGH END:

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.

DISASSEMBLY:

Remove retainer bolt, lockwasher, and shaft retainer from

drive shaft. Pull drive shaft out of reducer from adapter

side. Remove adapter.

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 housing.

Remove seals, seal carriers, and bearing cups from

housing.

Clean all parts in solvent, inspect for damage, and coat

with oil.

REASSEMBLY:

Output Hub Assembly: Heat gear to 325ºF to 350ºF to

shrink onto hub. Heat bearings to 270ºF to 290ºF to shrink

onto hub. Any injury to the hub surfaces where the oil seals

rub will cause leakage, making it necessary to use a new

hub.

Input Shaft Assembly: Shaft and pinion are integral. Press

bearings on shaft. Press against inner (not outer) race of

bearings.

Drive the two dowel pins into place in the right hand

housing half. Apply RTV732 sealant to carriers for R.H. side

(backstop side) of reducer. Install carriers and torque bolts

per Table 5.

Place R.H. housing half on blocks to allow for protruding

end of output hub.

Install bearing cups in right-hand housing half, making sure

they are properly seated.

Mesh output hub gear and input pinion assembly 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 1/8" bead of

RTV732 sealant on flange face (make sure RTV is placed

between bolt holes and inside of flange face). Place other

housing half into position and tap with a soft hammer

(rawhide, not lead hammer) until housing bolts can be used

to draw housing halves together. Torque housing bolts per

torque values listed in Table 5.

Place output hub seal carrier in position without shims and

install two carrier screws diametrically opposed. Torque

each screw to 25 in. – lbs. Rotate the output hub to roll in

the bearings and then torque each screw to 50 in. –lbs.

Again turn output hub to roll in the bearings. With a feeler or

taper gage, measure the gap between the housing and the

carrier flange. To determine the required shim thickness,

take the average of the two feeler gage readings. Remove

carrier and install the required shims plus .002. Install

carrier with shims and torque bolts per Table 5. Rotate hub

assembly, tap lightly with rawhide mallet on end of hub,

while rotating, to ensure bearings are seated. Using a dial

indicator check end play of hub bearings, endplay should

be .001–.003. Repeat this process as necessary to obtain

proper end play. Place a 1/8" diameter bead of RTV732

sealant inside the carrier at the shim I.D. and install carrier

on reducer housing. Torque carrier bolts to value shown in

Table 5.

Using the same procedure as in step 8, adjust the input

shaft bearings, except the axial end play should be .002" to

.004".

10. Using gaskets or RTV732, install input shaft cover to right-

hand housing half. Install input and output seals. Extreme

care should be used when installing seals to avoid damage

due to contact with sharp edges on the input shaft or

output hub. The possibility of damage and consequent oil

leakage can be decreased by covering all sharp edges with

tape prior to seal installation. Fill cavity between seal lips

with grease. Seals should be pressed or tapped with a soft

hammer evenly into place in the carrier, applying pressure

only on the outer edge of the seals. A slight oil leakage at

the seals may be evident during initial running, but should

disappear unless seals have been damaged.