1990/10/08 Caterpillar

Correct Installation Of Brake Piston Seals{4251}

Usage:

AP-1200 Asphalt Pavers

This article supersedes the article with the same title in Service Magazine; November 6, 1989; Page 8.

Use this article to correctly install the brake piston seals in the differential brake assembly on AP-1200 Asphalt Pavers.

NOTE: If the axle is equipped with a parking brake, it is possible to install the pistons incorrectly (backwards). Place identification marks on the pistons PRIOR to their removal.

With the piston face down, install the larger 8C7426 Seal (1) with the lip facing up. Looking toward the brake end of the axle housing, the lip of the seal should face toward you. To install the smaller 8C7427 Seal (2), the lip should face toward the front of the piston. See the illustrations.

Illustration 1. Location of seals.

Illustration 2. Location detail of seals.

Caterpillar Information System:

1990/10/08 Gerotor Charge Pump Used On Propel Pump; Inadequate Charge Pressure May Occur{3204,4320,5070,5082,7428}

1990/10/01 Answers To Quiz In This Issue {0114,1400}

1990/10/01 Incorrect Installation Of Slow-Moving Vehicle Sign (Triangle) May Affect Cooling Performance {7405,1353,7557}

1990/10/01 New 4C6090 Multichannel Temperature Selector Available To Aid In Diagnosing Low Power Complaints {0781}

1990/10/01 Correct Light Bulb Replacement For The 8T9290 Borescope; New Light Bulb Used {0777}

1990/10/01 What's Your Answer? {0114,1400}

1990/10/01 New Governor Control Bracket Used To Prevent Bolt Loosening {1265}

1990/10/01 New Magnetic Sensor Has Improved Shell And Potting Compound {7463,3175}

1990/09/24 Add Bolt Dampers To Oil Pump Mounting Bolts to Prevent Bolt Failures{1304}

1990/09/24 Standard Oval And High Temperature Oval Head Seals Available For Certain Hydraulic Cylinder Applications{7555,5102,5456}

1990/09/24 Sealing Threads On Switches And Sensors That Are Grounded Through The Case{1400,1900,3175,7422,7493}

1990/09/24 Two New Coolant Flow Switches Used On Machines Equipped With Electronic Monitoring System (EMS){1361,7422,7470}

1990/10/08 Serviced Parts Available For 8C4773 Electric Starting Motor Group{1453}

1990/10/08 Larger Drain Hole In Air Cleaner Group{1051}

1990/10/08 All Wheel Drive System Not Disconnected For Shipping Purposes{7500}

1990/10/08 Improved Rod Seal Combinations Used In Hydraulic Cylinders{4303,5104,5456,5457,5458,5468}

1990/10/08 Improved 4J3815 Gasket Helps Prevent Oil And Air Leaks In Hydraulic Tank Mounting And Filler Groups{5065}

1990/10/08 New Exhaust Valves Are Used In Caterpillar Remanufactured Cylinder Heads{1105,1101}

1990/10/08 New Pump Group With Bolt Dampers Used In Oil Pump Group{1304}

1990/10/15 New Vibratory Coupling Group Used; Loading Of Eccentric Weight Dampened{6605,6606,6645}

1990/10/15 New Caterpillar Extended Life Track Roller Groups Available{4180}

1990/10/15 New 1Q5737 Rim Clamp Used To Fasten Rim To Front Wheel{4202,4209}

1990/10/15 Separate Drain Lines For Steering Neutralizer Valves Eliminate Fittings Which Could Loosen{4304,4330}

1990/10/15 Be Sure To Use Only 5P3975 Rubber Lubricant On The Core Assembly End Seals In Folded Core Or Multiple Row Module Radiators{1353,1351}