1994/11/28 Caterpillar

Radiator Mounting Bolt Damage{1353}

Usage:

Challenger 65B (7YC),
Challenger 75 (4CJ),
Challenger 65C (2ZJ),
Challenger 75C (4KK) Agricultural Tractors

Tapped holes, for radiator mounting to the frame, were not drilled deep enough during production of some tractors. This is noticeable when the radiator is removed. The mounting bolts will have approximately 6.350 mm (1/4 in) of the thread stripped.

Before reassembling, retap the holes to have dimensions as shown in Illustration 1.

For easier radiator reattachment, fabricate a fixture that incorporates the bolt hole pattern and the width of the frame. Refer to "Fixture Can Be Used To Simplify Challenger Radiator Support Installation" in this issue for width dimensions.

Illustration 1. 8R-8872 Frame Assembly. (A) 11 + 0.15 -0.08 mm; (.433 +.006 -.003 in) Diameter; Drilled 32 mm (1.3 in) Deep; Internal 12.70 mm (.5 in); 2B Thread, 13 Threads/inch; Tapped to 22 mm (.9 in) Deep; 10 Holes (5 each side).

Caterpillar Information System:

1994/11/28 Fixture Can Be Used To Simplify Challenger Radiator Support Installation.{1353}

1994/11/21 3054 And 3056 Machine Engine Fuel Injection Pump Service{1251}

1994/11/21 New Speed/Timing Sensor Provides Parts Commonality For Electronic Unit Injector (EUI) Engines{1907}

1994/11/21 Wheel Bearing Check And Adjustment Maintenance Interval {4208}

1994/11/21 New Tank (Oil Saver) Used In Rear Axle Assembly{3260}

1994/11/21 Improved Bracket In Turbocharger Support Group Provides Improved Access To Exhaust Bypass Group (Wastegate){1073,1057}

1994/11/21 New Bearing Housing Used In Turbocharger Group{1056,1052}

1994/11/21 New Air Dryer Check Valve Assembly Used{4285}

1994/11/21 New Oil Cooler Group{1374}

1994/11/14 New 24 Volt Halogen Lamp Groups And Lamp Guards Available{1429}

1994/11/14 Correct Hydraulic Tank Breather Must Be Used To Prevent Oil Loss{5056}

1994/11/14 Hydraulic System Instability In The Hoist Second Stage Can Be Eliminated{5051,5057}

1994/11/28 New Front Axle Shims Make Adjustment Easier{3250}

1994/11/28 Screened Filter For Implement Motor Case Drain Return Line{5720,4351,4921}

1994/11/28 Improved Spring Used In Belt Tightener Groups{1358}

1994/11/28 Be Sure Correct Piston Cooling Jets Are Installed{1331}

1994/12/05 New Differential Group Housing Used In The Output Gear Group{3159}

1994/12/05 New Muffler Bracket Improves Muffler Support{1062}

1994/12/05 Hardened Spacers Used In Steer Pivot{4300,7051,7066}

1994/12/05 Flexible Hose Assembly Replaces Tube Assemblies In Turbocharger Water Lines Groups{1380}

1994/12/05 Dry Start Priming Procedure for 3500 Machine Engines with Electronic Unit Injection (EUI){1250,1258}

1994/12/12 Procedure For Measuring Oscillating Hitch Wear {7113,7114}

1994/12/12 Procedure To Bleed And Charge The Rear Suspension{7213}

1994/12/12 Caterpillar Hose Press And Tool Usage{5057,0684}