1996/04/22 Caterpillar


New Stronger Three-Point Hitch Used{7120}

Usage:


Challenger 35 (8DN),
Challenger 45 (1DR),
Challenger 55 (7DM) Agricultural Tractors

SUPPLEMENT: 05/13/96

Service Magazine; April 22, 1996; Page 2; "New Stronger Three-Point Hitch Used"for Challenger 35 (8DN), Challenger 45 (1DR), and Challenger 55 (7DM) Agricultural Tractors.

Items 50 and 56 are incorrect (reversed) in the chart found on Page 9. The following chart has been corrected.

--------------- END SUPPLEMENT ---------------

Description of Change: A new three-point hitch design is used. The new three-point hitch offers the following improvements.

* The rockshaft is made from a stronger material and has finer splines for a larger root diameter.
* The lift arms are heavier and made of a stronger material.
* Cylinder lift and top pivot pins are a larger diameter, and grease zerks and cross drilling were removed to increase strength.
* The lift links have larger diameter rods and larger diameter pins at the top and the bottom.
* The lift links also have a stronger fork at the bottom and a ball swivel at the top.
* The lift cylinders have a grease zerk in the upper pivot bushing area.

Adaptable To: The new three-point hitch is effective with Challenger 35 (8DN1), Challenger 45 (1DR720), and Challenger 55 (7DM1) Agricultural Tractors. The new three-point hitch is adaptable to all earlier machines as a complete group. Because the rockshaft splines and most of the pin diameters have changed, a partial field installation of individual components is not possible.

See the illustrations and charts for component part numbers and locations.


112-8889 Upper Link Assembly.


134-4780 Lift Link Assembly.

Caterpillar Information System:

1996/04/22 Special Instruction, SEHS9885, Available for Installation of 104-2315 (US) & 108-1952 (UK) Ground Speed Sensor Group{0374,7493}
1996/04/22 Service Parts Are Available For 6E-6312 And 9T-6148 Accumulator Groups{5077,4263,4331}
1996/04/15 New Element Assemblies Available Within Jacket Water Heater Groups{1383}
1996/04/15 New Engine Valve Cover Gasket Helps Prevent Oil Leaks{1107}
1996/04/15 Improved Handle Assembly For Cab Window Now Available{7308}
1996/04/15 Engine Variable Speed Fan Clutch System Service Tips{1359}
1996/04/15 Special Instruction, SEHS9891, Available for Installation of 119-9737 Flow Control Group{0374,5137}
1996/04/15 Special Instruction, SEHS9869, Available for Field Installation of 132 liter/min (35 U.S. gpm ) Implement Pump{0374,5070,5057}
1996/04/08 New Sprocket For Feeder Drag Conveyor{6632}
1996/04/08 New Blade Control Valve Reduces Noise{5136}
1996/04/01 129-0372 Primary Fuel Filter/Water Separator Assembly Used On 3408E And 3412E Machine Engines With Hydraulic Electronic Unit Injection (HEUI) {1260,1263}
1996/04/01 New Vee Band Clamp For Turbocharger Exhaust Couplings Reduces Exhaust Leaks {1052}
1996/04/29 New Gear Has Improved Life{4050,4055,4059}
1996/04/29 New Operator Compartment Door and Side Panel Seal Improves Sealing and Reduces Cab Noise{7301,7308}
1996/04/29 Special Instruction SEHS9948 Available For Rear Axle Lubrication And Filtration Retrofit For 793 And 793B Off-Highway Trucks.{3278}
1996/04/29 New Cover Assembly Increases Leg Room{4310}
1996/04/29 Indicator Relocated To Increase Service Life{7452,7497}
1996/04/29 New Seal Kit Available For Service Repairs To The Leg Cylinders{7224,7201}
1996/04/29 Integral Connector Now Used On The Air Conditioning Condenser Fan Motor Relay Assembly{1408,7320}
1996/04/29 New Rear Crankshaft Seal Improves Service Life{1161}
1996/04/29 New Piston Assembly And New Piston Ring Kit Provide Reduced Oil Consumption{1214,1215}
1996/04/29 New Element Assemblies Available Within Jacket Water Heater Groups{1383}
1996/05/06 Cast Duo-Cone Seals Available For Final Drives {4052,7561}
1996/05/06 Service Magazine Special Edition, SEPD0304, Available {0374}
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