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Dodge HYDROIL TORQUE-ARM HXT325C 部品交換マニュアル

REMOVING TAPER BUSHED REDUCER FROM

SHAFT

WARNING: External loads may cause machine movement.

Block machine before removing any drive train

components. Failure to observe these precautions could

result in bodily injury.

Remove bushing screws.

Place the screws in the threaded holes provided in the

bushing flanges. Tighten the screws alternately and

evenly until the bushings are free on the shaft. For ease of

tightening screws make sure screw threads and threaded

holes in bushing flanges are clean.

Remove the outside bushing, the reducer and then the

inboard bushing.

DISASSEMBLY

Remove all bolts from housing. Drive back hollow dowel

pins on either side of housing. Remove backup plates and

snap rings on the output hub on taper bushed reducers.

Open housing evenly to prevent damage to parts inside.

Lift shaft, gear and bearing assemblies from housing.

Remove seals, seal carriers and bearing cups from

housing.

REASSEMBLY

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

shrinking onto output hub. Heat bearing cones to 270º to

290ºF for shrinking onto output hub.

Countershaft Assembly: Heat gear to 325º to 350ºF and

bearing cones to 270º to 290ºF for shrinking onto shaft.

Input Shaft Assembly: Shaft and pinion are integral. Heat

bearing cones to 270º to 290ºF for shrinking onto shaft.

Drive the dowel pins back into position in the right hand

housing half.

Install countershaft cover in right-hand 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 properly seated.

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 below

Place output hub seal carrier in position without slims 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 output hub to roll

in the bearings. With a feeler or taper gage, 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 gage 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 1/8" 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 value shown in Table 5. Output hub

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

Adjust the countershaft bearings using the same method

as in step 8 above. The axial end play should be .001" to

.003".

10. Again using the same procedure as in step 8, adjust the

input shaft bearings, except the axial end play should be

.002" to .004".

11. Apply sealant to the input shaft cover gasket and install

input shaft cover in 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. This danger of

damage and consequent oil leakage can be decreased by

covering all sharp edges with tape or paper 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 in but should disappear unless

seals have been damaged.

12. Install bushing back-up plate and snap rings.