Dodge MRC-TC06NC Instrukcja obsługi - Strona 3

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MODIFIED ASSEMBLY PROCEDURE

SCXT325A MIMA/ITW (WRAPPER UNITS)

1. All assembly procedures for standard SCXT325A should

be followed except for the following changes in shimming

of output bearing.

2. New output bearing shimming procedures:

Place output bearing cup in left half of housing. Ensure

the bearing cup is correctly seated.

Position output hub seal carrier (without shims) and

install two carrier screws diametrically opposed.

Torque each screw to 50 lb.-in. Rotate the output hub

to roll in the bearings, then torque each screw to

100 lb.-in. Rotate the output hub again to roll in the

bearings.

Seat output bearings by tapping the seal carrier with

a hammer; turning the output hub through 360 degrees

to further roll in the bearings. Torque carrier bolts

again to 100 lb.-in. Repeat this process of hammering,

turning the output hub, and torquing to 100 lb.-in. until

bearings are completely seated (3-4 seatings may be

required).

With a feeler or taper gauge, measure the gap between

the housing and the carrier, clockwise from and next to

each screw.

To determine the required shim pack thickness,

subtract .005 in. from the average of the two gauge

readings (Pack Thickness = Gauge Average – .005 in.).

Remove the output hub seal carrier and install the

required shims (shim pack thickness should be

inspected with a 0-1" micrometer).

Note: Total shim thickness per carrier should not

include more than .009" plastic shims. All other

shims should be metal, and each plastic shim

should be inserted between two metal shims.

Continue with normal assembly procedure from this

point. (Carrier bolt torque should be 204 lb.-in.)

Place countershaft bearing carrier in position without

shims and install two carrier screws diametrically opposed.

Torque each screw to 25 lb.-ins. Rotate the output hub to

roll in the bearings and then torque each screw once to 50

lb.-ins. Do not retorque screws. Again turn countershaft to

roll in the bearings. With a feeler or taper gauge, measure

the gap between the housing and the carrier, clockwise

from and next to each screw. To determine the required

shim thickness, take the average of the two feeler gauge

readings. Remove carrier and install the required shims.

Note: Total shim thickness per carrier should not include

more than .009" plastic shims, and each plastic shim

should be inserted between two metal shims. Place a

diameter bead of Dow Corning RTV732 sealant on the face

around the I.D. of the end shim (sealant is to be between

reducer housing and shim) and install carrier on reducer

housing. Torque carrier bolts to 204 lb-ins. Countershaft

should have an axial end play of .001" to .003".

Using the same procedure as in step 3 adjust the input shaft

bearings, except the axial end play should be .002" to .003".

Torque bearing carrier to 204 lb-ins.

Table 5 — Manufacturers' Part Numbers For Replacement

Output Shaft Bearings

TORQUE-ARM Reducer

Drive Size

SCXT3A

Table 6 — Manufacturers' Part Numbers For Replacement

Countershaft Bearings

Countershaft Bearing Input

TORQUE-ARM

Side

Dodge

Size

Part No.

402273

SCXT3A

403094

Table 7 - Manufactures' Part Numbers For Replacement Input Shaft Bearings

Input Bearing

TORQUE-ARM

Input Side

Dodge

Size

Part No.

402204

SCXT3A

403139

Output Hub Bearing

DODGE

Manufacturer's Part

Part Number

Number

402272

LM814849

403127

LM814810

Countershaft Bearing Adapter

Side

Manufacturer's

Dodge

Manufacturer's

Part Number

Part No.

Part Number

15102

402273

15245

403094

Input Bearing

Adapter Side

Manufacturer's

Dodge

Manufacturer's

Part Number

Part No.

Part Number

LM48548A

402273

LM48510

403094

15012

15245

15102

15245