1993/11/01 Caterpillar

Check Valves Now Used In Hydraulic Steering Circuit To Prevent Steering Kickback{5067}

Usage:

AP-1000 (1HD) Asphalt Pavers

Description of Change:

Check valves are now installed in the inlet port (P) of each steering valve on the AP-1000 Asphalt Pavers. The new check valves reduce the potential for steering kickback.

Location of 103-7345 Check Valves in 87-1456 Steering Oil Lines.
(1) 103-7345 Check Valve. (2) 6V8397 O-ring Seal. (3) 3K0360 O-ring Seal. (4) Steering valve. (P) Inlet Port.

Adaptable To: The new 103-7345 Check Valve is installed effective with AP-1000 (1HD56). The new check valves are adaptable to AP-1000 (1HD1-Up) by removing the 6V-8723 Elbow in the inlet port (P) and installing the 103-7345 Check Valve for each steering valve group. When installing the 103-7345 Check Valve, replace the 6V-8397 and 3K-0360 O-ring Seals at each location. See illustration for location of new check valve.

Caterpillar Information System:

1993/11/01 High Pressure Wash Kit Replaces High Pressure Pump To Improve Service Life{5614}

1993/11/01 Serviceable Parts For Water Spray Pump{5614}

1993/11/01 Serviceable Parts Available For Tilt Cylinder Load Control Valve Groups{5104,5117,5123,5127}

1993/11/01 New Precharge Pressures For Trucks With Two Steering Accumulators{4331}

1993/11/01 New Thicker Front Wheel Castings Are Used To Increase Wheel Life{4201}

1993/10/25 New Bracket Replaces Heat Shield In Turbocharger Support Group For Additonal Strength{1050,1073}

1993/10/25 New Clips With Grommets Used On Large Water Lines Prevents Wear{1380}

1993/10/25 Pre-Strikeoff Plates With Angled Deflector Available For VIP Screeds{6646}

1993/10/25 Stronger Drive Chains Available For Parts Service{3261}

1993/10/25 Heavy-Duty Seal Kit Availble For Servicing Brake Calipers{4256,4250}

1993/10/25 Change In The Assembly Procedure Of The Damper In The Parking And Service Brake Group Provides Greater Reliability{4151,4267}

1993/10/25 New Fan Guards Used In Suction Fan Group{1360}

1993/11/01 Sealant Replaces A Gasket In Oil Pan Groups{1302,7555}

1993/11/09 Effort Needed To Depress And Hold The Foot Accelerator Pedal Can Be Reduced{1265,1250}

1993/11/09 Rear Axle Lubricant Now Being Offered{3278}

1993/11/09 Improved Window Seals And Sealing Procedure Used On Most Caterpillar Machines{7300,7310}

1993/11/09 New Cylinder Block Groups Have Additional Material Added To The Camshaft Bore Area{1201}

1993/11/15 Engine Overheating May Be Caused By Paint Plugging Radiator Core {0771,1000,1374}

1993/11/15 Early Hour Maintenance For The B-Series Extendable Stick {6833}

1993/11/15 Radiator Shroud Assembly Has Slots To Make Removal Easier {1381}

1993/11/15 New Hose Assemblies Used To Prevent Brake Cooling System Overheating {4257}

1993/11/15 Rear Frame To Oscillating Hitch Plate Joint Has Been Reinforced {7051}

1993/11/15 Parts Available To Adapt Umbrella To Asphalt Pavers {7313,7312}

1993/11/15 New Fuel Injection Lines, Clamps, And Brackets Used In Fuel Injection Lines Groups {1252}