1994/07/08 Caterpillar

Alternator Circuit Breaker May Have An Intermittent Fault{1420}


RT50, RTC60 (5PF,4XG),
RT60 (5DG),
RT50 SA (8DJ),
RT80 and RT100 (1GJ) Telescopic Material Handlers

Reference: Special Instruction, SEHS6144, "Setting Instructions for 815920 Electronic Control Box Group", RT50SA, RT50, RTC60 and RT60 Telescopic Material Handlers.

Special Instruction, SEHS6222, "Calibration of Telescopic Material Handler Mark III Control Boxes", RT80 and RT100 Telescopic Material Handlers.

9S0173 Alternator Circuit Breaker.

There have been reports of defective 9S0173 Alternator Circuit Breakers (1), that open and close intermittently. When the circuit breaker is open, battery charge stops. When it closes, a voltage surge through the system occurs.

When the battery charge falls below a predetermined level, or an excessive voltage surge occurs, the control system is automatically disconnected at the control box under the operators seat and all functions controlled by the joystick become inoperative.

When the alternator circuit breaker faults, check the fault codes displayed by the control box. Refer to the Special Instructions referenced above for details of the fault codes and remedial action required.

If the code indicates low battery voltage, check the charging system. Be sure that the 9S0173 Alternator Circuit Breaker is fully serviceable before including it in circuits to test other components.

Caterpillar Information System:

1994/07/08 Improved Mounting Method For Hydraulic Quick Hitch Pins{5133}
1994/07/08 Ensure Brake Hose Is Clear Of Engine Oil Pan{4257}
1992/06/01 Improved Joystick Available For The RT80/RT100 Telescopic Material Handler{5700}
1992/06/01 Rolling Hose Pulley Modification Improves Hose Retention{6460}
1991/12/01 Checking The 838440 Joystick Group{5485}
1991/12/01 Service Parts Available for 838440 Joystick Controller Group. Procedure to Recalibrate the Joystick{5485}
1991/12/01 RT80/RT100 Gearbox Lubrication{3000}
1991/12/01 Test Harness For Calibrating 838141 Electronic Control Box{5485}
1991/11/01 Parts Book Correction{5725}
1991/08/01 Timing Mark Identification On Fuel Pump Gear{1286,1251,1272}
1990/01/15 Separate Service Manual Microfiche Library Available For Engines Only {1000,0374,0375}
1990/01/15 Capability To Push A Nurse Or Additive Truck {5600,3060}
1994/07/08 Avoid Damage to Boom and Attachment Control{5700}
1994/07/08 Brake System Servicing{4005}
1994/07/08 Improved Master Cylinder Available{4258,4259,5470}
1994/07/08 New Retrofit Kit Available For Brake Pipe Arrangement{4257}
1994/07/08 Improved Transmission Oil Filler Tube Mounting{3014}
1994/07/08 Transmission Drive Shaft Group Replacement{3253}
1994/07/08 Extended Shuttle Valve Holder{4289}
1994/07/08 Improved Lubrication Of Attachment Coupler Bushing{5133}
1979/01/10 Check The Adjustment Of The Original Tachometer Before A New Tachometer Is Installed
1979/01/10 New 6V87 Gauge Measures Valve Stem Wear
1979/01/10 Caution: Do Not Change Orifice In Water Outlet Of Auxiliary Pump Group
1979/01/24 A New 6V29 Sleeve Metering Fuel System Pump Roll Pin Tool Is Used To Adjust And Make A Replacement Of Roll Pins In The Fuel Injection Pump Housing
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