1990/01/15 Caterpillar

New Conveyor Drive Pump Increases Conveyor Speed {5620}

Usage:

PR-450 Pavement Profilers

SUPPLEMENT: 08/06/90

SERVICE MAGAZINE; JANUARY 15, 1990; PAGE 5; "New Conveyor Drive Pump Increases Conveyor Speed" on PR-450 Cold Planer. Disregard this article and made reference to the article with same title in this issue.

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

Description of Change: A new conveyor drive pump is used to increase conveyor speed. The output flow of the new pump is higher than the former pump. The new pump will provide approximately thirty percent higher conveyor belt (lower and upper) speeds.

Adaptable To: The new 7R8276 Pump is a direct replacement for the former 8T6302 Pump. The new pump is effective with PR-450 Pavement Profiler 7DC170. The new pump is adaptable to earlier machines if a faster lower conveyor is needed. If the faster speed is not needed on the lower conveyor continue to use the 8T6302 Pump.

Caterpillar Information System:

1990/01/15 Many Components That Were Previously Only Serviced As Complete Groups Now Have Serviceable Components {0374}

1990/01/15 New Governor Control Cable Resists High Temperature And Is More Appropriate For Some Applications {1265}

1990/01/15 Information About Front Tire Wear And Drive Train Noise {4203,4231,4233,3000}

1989/12/25 New Fuel Return Valve Prevents Siphoning{1253,1274}

1989/12/25 New Cooling System Cleaner Now Available For All Engines{1350,0680,1352,1353}

1989/12/25 Do Not Use 1U5555 Hydraulic Hose Press Pump Group In 230 Volt Circuits{0616,5057}

1989/12/25 New Shaft Assembly Available For Cutter Drum{6601}

1989/12/25 Alternative Air Pressure Test Point{1804}

1989/12/25 Gaiter (Protector) Available For "Over-Hitch" Hoses{7167,5057}

1989/12/25 Components Of 9T1318 Steering Metering Pump Group Are Available For Parts Service{4312}

1989/12/25 New Thrust Discs Used In Transmission And Transfer Drive Groups{3060,3260}

1989/12/25 Electrical Connection Studs Are Too Long On Fuel Level Sensor{7481,1400}

1990/01/15 Capability To Push A Nurse Or Additive Truck {5600,3060}

1990/01/15 Separate Service Manual Microfiche Library Available For Engines Only {1000,0374,0375}

1991/08/01 Timing Mark Identification On Fuel Pump Gear{1286,1251,1272}

1991/11/01 Parts Book Correction{5725}

1991/12/01 Test Harness For Calibrating 838141 Electronic Control Box{5485}

1991/12/01 RT80/RT100 Gearbox Lubrication{3000}

1991/12/01 Service Parts Available for 838440 Joystick Controller Group. Procedure to Recalibrate the Joystick{5485}

1991/12/01 Checking The 838440 Joystick Group{5485}

1992/06/01 Rolling Hose Pulley Modification Improves Hose Retention{6460}

1992/06/01 Improved Joystick Available For The RT80/RT100 Telescopic Material Handler{5700}

1994/07/08 Ensure Brake Hose Is Clear Of Engine Oil Pan{4257}

1994/07/08 Improved Mounting Method For Hydraulic Quick Hitch Pins{5133}