BUSHING 4J4232 - Caterpillar

Illustration 1 g01316743
(1) Transmission Electronic Control Unit (ECU)Note: When a new transmission is put into service the electronic control unit (ECU) must be informed of the type of well servicing application the unit will be placed into. This must also be done when the transmission ECU is reflashed. This procedure is found in Special Instruction, REHS4541, "Software Configuration Guide".The transmission ECU monitors the condition of the machine for proper system operation. Components sense the condition of the machine. Components then send electrical signals to the inputs of the electronic control unit (ECU).Warning Light IndicatorsCaterpillar requires that OEM transmission users install a RED and AMBER operator warning lamps. The lamps may have several locations within the operator station depending on the design by the OEM. The lamps provide an indication of transmission condition.
AMBER Caution Lamp The diagnostic lamp is yellow or AMBER. The diagnostic lamp will communicate the status of the transmission electronic system. If the amber lamp is activated, the lamp alerts the operator that a diagnostic condition is active within the transmission. The amber lamp does not require immediate operator attention, but normal operation of the transmission may be affected.
RED Warning LampThe RED warning lamp warns the operator of conditions which require immediate attention. The warning lamp indicates either a transmission oil filter by-pass or an excessive oil temperature. Immediate operator action is required to reduce transmission oil temperature or to service the oil filters.Transmission Shifting Function
The shift pad for the transmission is used to select the appropriate gear and direction of travel during operation. The CX28 transmission has six forward gears, neutral, and one reverse gear.Transmission Gear Selector
Caterpillar gear selectors are the operator control for the transmission. The shifter have a two-digit display that serves as the transmission communication display for gear selection. The shift selector communicates with the transmission over the "J1939" data link.Note: The vehicle must not be equipped with any component that uses a "J1939" Source Address of "0x05" or "0x06". Except for Cat approved shift selector modules.Keypad Shifter
The shift selector pad, or keypad shifter, has six operator buttons and a two-digit display. The keypad shifter is compatible with CX28 transmissions, and is shown in Illustration 2.With the ignition key switch ON, the shift selector pad will display a pair of "N's" on the display. This display indicates that the transmission is in Neutral.Note: If the desired gear is flashing, the shift is being inhibited.
The machine must be stopped and the engine at low idle before changing direction. After moving the transmission control, do not accelerate until after hearing or feeling the transmission clutches engage.