1990/02/12 Caterpillar

New Mounting Bolts And Washers Used For Propel Motor{4351,7553}

Usage:

CB-534 ( 2EG, 2YF ) Vibratory Compactors

Description of Change: New motor mounting bolts and washers are used to secure the propel motors. The new bolts incorporate a longer shoulder and have an increased hardness rating. With the use of the new hardened bolts and washers, the propel motor will remain secure. The former bolt had a lower hardness rating and a shorter shoulder length that could allow the bolts to work loose.

Adaptable To: The new 8T2393 Socket Head Bolt replaces the former 6V8289 Bolt which has been canceled. The 6V8823 Hard Washer is an additional part. Tighten the new bolts to a torque of 300 ± 30 N·m (220 ± 20 lb ft). This change is adaptable to all earlier machines. See the illustration for location of parts.

Location of new bolts and washers.

Caterpillar Information System:

1990/02/12 New Mounting And Cylinder Group, Quick Coupler Group And Lines Group Improve Visibility{5133,5057,6129}

1990/02/12 New Components Used In Positioner And Kickout Group{6107,5109,5112}

1990/02/12 Rework Procedures For The Hydraulic Pump Bias Piston{5070}

1990/02/12 Longer Nipple Prevents Mud From Covering Rear Axle Housing Breather{3260}

1990/02/12 Use Correct Method When Installing Center Bonded Mounts{1273,5056}

1990/02/12 Improved 2U0259 Rubber Cover For Hoist Valves Is More Resistant To Heat And Contaminants{5136}

1990/02/12 New Mounting Bracket Improves Operation Of Hoist Cable{5136}

1990/02/12 Heavy-Duty Wiper Motor Used{7305}

1990/02/12 New Pressure Switch Used In Suspension Inhibit Circuit{7200}

1990/02/12 Move The Grease Fitting To Improve Lubricant Penetration To Suspension Frame Bearings

1990/02/12 Invert A-Frame Mounting Bolts To Obtain Correct Torque{3268,7200}

1990/02/12 Seals Can Be Added To Suspension Cylinder Bearings{7213}

1990/02/12 New Oil Cooler Gasket Has Bead On Only One Side{1378}

1990/02/12 New Exhaust Manifold Stud Available{1059}

1990/02/12 Identification Of Turbocharger And Fuel System Components{1250,1700,1052}

1990/02/12 Procedure To Charge Air Conditioner Using Receiver Dryer Sight Glass{7320,7322}

1990/02/12 Contaminated Refrigerant Can Cause Air Conditioner Failures{7320,1802,1805,7322}

1990/02/12 New Air Conditioner Thermostat Switches Used{7320}

1990/02/19 New Spider Assembly Used In Suction Fan Group{1356}

1990/02/19 New Turbocharger Guard Assembly Resists Vibration Better{1073}

1990/02/19 Shorter Tube Assembly Stops Hoses From Rubbing In Rear Hoist Oil Lines Groups{5057,5102}

1990/02/19 New Drain Lines Available For Differential Assemblies{3283,5057}

1990/02/19 Clutch Plumbing Kit Increases Cooling Flow And Lockup Pressure For Longer Service Life{5606,6601}

1990/02/19 Improvements Made To Water Pumps; New Groups/Parts Available For Certain Applications{1364,1361}