1992/06/01 Caterpillar

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

Usage:

RT80, RT100 Telescopic Material Handler

Reference: Special Instruction; TMH Mark III Calibration Standard Hydraulics, SEHS6222.

Description of Change: An improved 838886 Joystick Controller is now available. The improvements are all internal and include:

1. Improved RFI protection

2. Static protection

3. Improved head wiper tracks

4. Conformal coating on the bottom PCB

Since these changes are all internal, a permanent identifying mark has been put on the new joystick. This mark is a 19 mm (.75 in) diameter red mark under the controller head on the right hand side.

Adaptable To: The improved joystick is retrofittable and easily changed. After changing the joystick the electronic control box needs to be recalibrated. Refer to Special Instruction, "TMH Mark III Calibration Standard Hydraulics", SEHS6222.

Caterpillar Information System:

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}

1990/01/15 New Conveyor Drive Pump Increases Conveyor Speed {5620}

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}

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}

1994/07/08 Alternator Circuit Breaker May Have An Intermittent Fault{1420}

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