
2
Basic Operation:
The Hilliard Front Drive System (Differential) is an electro-mechanically-activated bi-directional overrunning clutch.
When 12 volts of power is sent to the 4WD switch, the unit is activated to engage both front wheels instantaneously,
whenever the rear wheels loose traction. The clutch also releases or overruns automatically the instant the rear wheels
regain traction. Because torque is transmitted to both front wheels, it is a “true” 4WD. The over-running characteristics of
this system allow for an on demand 4WD engagement and steering ease.
Specifications:
Ratio…………………………………………………………… 3.82:1 (Input:Output)
Fluid Capacity…………………………………………………. 180ml. (6 oz.) Hilliard CFD Gearcase Lube
Voltage………………………………………………………… 12 volts (15 volts max/11 volts min)
Coil Resistance…………………………………………………24.7 ohms to 27.3 ohms (at 20°C/68°F)
Input & Output Cover Bolt Torque…………………………….17 ft*lbs
Mounting Bolt Torque………………………………………….32 ft*lbs.
Oil Fill Plug Torque…………………………………………….10 ft*lbs
Oil Drain Plug Torque…………………………………………..10 ft*lbs
External Input Shaft Spline……………………………………. 22 Tooth, 24/48 Pitch, Fillet Root Side Fit, Special Class 7
Internal Output Shaft Spline…………………………………... 22 Tooth, 24/48 Pitch, Fillet Root Side Fit, Special Class 7
Mounting Feet Thread Size…………………………………… 3/8-16 UNC-2B, (4) Places x .85” Deep
Continuous Torque Rating……………………………………. 145 ft*lbs (Input)
Hilliard 4WD CFD Gearcase Oil Part Number……………….. 0756-01-018-T
General Maintenance:
It is recommended that the oil be changed once every 2000 miles. To change the oil, follow each step on the procedure
listed below.
Oil Change Procedure
1.
Remove the oil drain plug located on the bottom of the gearcase using a 5/16” hex key wrench.
2.
Let all the oil drain out of the unit. Catch and discard the oil properly.
3.
Be sure to clean off any debris on the drain plug and reinstall. Torque the oil drain plug to 10 ft*lbs.
4.
Remove the oil fill plug using a 5/16” hex key wrench.
5.
Add 180 ml. (6 oz.) of the Hilliard CFD Gearcase Lube (
note: do not use any other type of oil in this system or the
4WD will not operate properly!)
6.
Reassemble the oil fill plug into the gearcase and torque to 10 ft*lbs.
Backlash Adjustment
1.
Using a 5/32” Allen wrench, turn the #10-24 socket head cap screw (located inside the hollowed out round boss
protruding from the output cover) clockwise until it will not move any more (do not apply a lot of torque). At this
point, you should not be able to turn the pinion gear (part #36, Page 5). Do not tighten the screw.
2.
Now, slowly turn the backlash cap screw counter-clockwise while turning the pinion gear at the same time. Keep
slowly turning the backlash cap screw until the pinion gear can rotate (4) times (1 revolution of the ring gear) freely
without any tight spots. You should only have to turn the backlash cap screw between 1/8 and 1/4 of a turn to have the
proper backlash set.
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Страница 12: ...Chapter 1 Introduction 8 ...
Страница 66: ...Chapter 2 Drive System CVT and Transfer Case 62 ...
Страница 78: ...Kohler Enclosed CVT Addendum 74 ...
Страница 92: ...Caterpillar Enclosed CVT Addendum 88 ...
Страница 126: ...Chapter 3 Drive System Drive Shafts and Differentials 122 ...
Страница 278: ...Chapter 8 Caterpillar Engine and Related Systems 274 ...
Страница 318: ...Chapter 9 Electrical 314 Electrical Schematic Main Wiring Harness w Kohler engine 725 04351 725 04365 ...
Страница 319: ...Chapter 9 Electrical 315 Electrical Schematic Engine Harness w Kohler engine ...
Страница 320: ...Chapter 9 Electrical 316 Electrical Schematic Main Harness w Caterpillar engine 725 04327 725 04365 ...
Страница 321: ...Chapter 9 Electrical 317 Electrical Schematic Engine Harness w Caterpillar engine 725 04341 ...
Страница 322: ...Chapter 9 Electrical 318 ...
Страница 323: ...1 Front Drive System Differential Gearcase P N 6203 01 280 Parts and Service Manual Rev 0 Released 1 16 2012 ...
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