938G Series II Wheel Loader and IT38G Series II Integrated Toolcarrier Hydraulic System Kickout System - Integrated Toolcarrier Caterpillar


Kickout System - Integrated Toolcarrier
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938G Series II Wheel Loader and IT38G Series II <BR>Integrated Toolcarrier Hydraulic System [RENR6077]
HYDRAULIC SYSTEM
KICKOUT & POSITIONER GP
938G Series II Wheel Loader and IT38G Series II Integrated Toolcarrier Hydraulic System Kickout and Positioner - Adjust
938G Series II Wheel Loader and IT38G Series II Integrated Toolcarrier Hydraulic System Kickout System - Integrated Toolcarrier
1.1. Implement Kickouts
2.2. Lift Kickout
3.2. Work Tool Positioner



Illustration 1g00947297

Diagram for the Kickout System

(1) Power train ECM. (2) Lift Kickout. (3) Control group. (4) Ball switch (hydraulic lockout detent override). (5) Magnet assembly (lift). (6) Magnet (tilt). (7) Magnet assembly. (8) Control group (forks). (9) Control group (bucket). (10) Detent coil (lift). (11) Detent coil (tilt). (12) Bucket/forks selector switch. (13) Work tool positioner.

The kickouts are standard equipment on the IT38G Series II Integrated Toolcarrier. The kickouts consist of the lift kickout and the work tool positioner. The integrated toolcarrier is equipped with a work tool positioner with two functions. One function will position a bucket and the other function will position the forks or another attachment.

When the key start switch is placed in the ON position, battery voltage is sent to contact J1-1 on the power train (ECM) (1). Current travels through wire 700-PK from the detent enable on contact J1-32 to the ball switch (hydraulic lockout) (4). Then, current flows from the ball switch (hydraulic lockout detent override)to the kickout on/off switch (6). From kickout on/off switch (6), current flows through wire 962-OR to either contact 15 or to contact 16 on the power train (ECM) (1). At this time, the power train (ECM) (1) has a signal in order to enable both the lift kickout and the work tool positioner.

The power train (ECM) (1) enables control group (3) for the lift kickout and control groups (8, 9) for the work tool positioner. The control group receives + battery voltage from contact J2-19 on the power train ECM through wire F766-WH. Control group (3) for the lift kickout is enabled. Then, current flows to detent coil (10) in the pilot valve through wire 781-GY. Detent coil (10) is energized.

Control group (8, 9) for the work tool positioner receives + battery voltage from contact J2-19 on the power train (ECM) (1) through wire F766-WH. Control group (9) for the bucket and control group (8) for the forks are a solid state control group. Magnet assembly (7) on the control arm must pass over the control group at least one time in order to set the appropriate control group.

After magnet assembly (7) has passed over the control groups for the work tool positioner, control group (9) for the bucket or control group (8) for the forks is enabled. Current flows from control group (9) through wire 762-YL to contact 1 of the bucket/fork selector switch (12). Also, current flows from control group (8) through wire 964-BU to contact 3 of the bucket/forks selector switch (12).




Illustration 2g00940568

Panel for the Switches

(6) Kickout on/off switch. (12) Bucket/forks selector switch.

The position of bucket/forks selector switch (12) will determine the control group that will be in control of detent coil (11). When bucket/forks selector switch (12) is placed in the FORWARD position, control group (8) for the forks will control the current to detent coil (11). When bucket/forks selector switch (12) is placed in the REARWARD position, control group (9) for the bucket will control the current to detent coil (11) .

Current flows from the bucket/forks selector switch (12) to detent coil (11) through wire 961-BR.

Implement Kickouts




Illustration 3g00940451

Implement Control Group

(2) Lift kickout. (13) Work tool positioner.

The implement kickout consists of lift kickout (2) and the work tool positioner (13). Lift kickout (2) determines the height of the lift arms. When the lift arms reach the adjustment of control group (3), detent coil (10) will be de-energized. The work tool positioner will control the desired angle of the work tool. The work tool positioner sets the desired angle as the work tool is rotated from the DUMP position.

The implement kickouts on the IT38G Series II Integrated Toolcarrier will be enabled, if the following conditions are met: The key start switch must be placed in the ON position. The on/off switch must be in the ON position. The bucket/forks selector switch (12) should be placed into the position for the implement that is desired. Magnet assembly (7) must pass over one of the control groups for the work tool positioner at least one time in order to set the control group.

Lift Kickout




Illustration 4g00947524

Example of a Pilot Valve in Detent

(10) Detent coil. (11) Detent coil. (14) Lever. (15) Detent plunger. (16) Retainer. (17) Cup.

Note: Illustration 4 can be used in Section "Work Tool Positioner".

When the conditions are met for the implement kickouts and the lift lever is moved to the full RAISE position, retainer (16) comes in contact with detent coil (10). Detent coil (10) will hold the lift lever in the RAISE position. Refer to Illustration 4 for an example of a pilot valve section in the DETENT position.




Illustration 5g00940446

(3) Control group. (5) Magnet assembly.

As the lift arms rise, magnet assembly (5) moves with the lift arm. When magnet assembly (5) starts to pass over control group (3), the contacts in control group (3) will open. The flow of current to detent coil (10) is interrupted. Detent coil (10) will lose the electromagnetic force. Detent plunger (15) will put a force on cup (17). The force on cup (17) will assist in pushing retainer (16) away from detent coil (10). The lift lever returns to the HOLD position. Then, the lift arms stop.

As the lift lever is moved to the lower direction, magnet assembly (5) moves away from control group (3). The contacts in control group (3) will return to the CLOSED position. Current will flow and detent coil (10) will be energized.

Work Tool Positioner

When all the conditions are met for the implement kickouts and the tilt lever is moved to the full TILT BACK position, retainer (6) comes in contact with detent coil (11). Detent coil (11) holds the lift control lever in the TILT BACK position. Illustration 4 is an example of a pilot valve in the detent position.




Illustration 6g00940443

Work Tool Positioner

(7) Magnet assembly. (8) Control group (forks). (9) Control group (bucket).

The work tool positioner consists of two control groups. Control group (8) is for positioning of the fork assembly. Control group (9) is for positioning of a bucket. Bucket/forks selector switch (12) allows the operator to use either control group (9) for the bucket or control group (8) for the fork assembly. This will permit the operator to change between a bucket and a fork assembly without manually readjusting the position of a control group after each change. The bucket or the forks are the normal work tools that use the work tool positioner.




Illustration 7g00940568

Panel

(6) Kickout on/off switch. (12) Bucket/forks selector switch.

When bucket/forks selector switch (12) is placed into the FORWARD position and the tilt lever is placed in the full TILT BACK position, retainer (16) contacts detent coil (11). Detent coil (11) will hold the tilt lever in the TILT BACK position. Refer to Illustration 4 for a pilot valve in the DETENT position.

As the fork assembly tilts back, magnet assembly (7) moves toward control group (8). When magnet assembly (7) nears control group (8), the contacts in control group (8) will open. The current flow to detent coil (11) is interrupted. Detent coil (8) will lose the electromagnetic force. Detent plunger (15) places a force on cup (17). The force assists retainer (16) in pushing away from detent coil (11). Then, the tilt lever returns to the HOLD position.

The forks are stopped at the correct angle for operation. The forks will stay in this position until the operator places the tilt lever in the DUMP position or the TILT BACK position.

When bucket/forks selector switch (12) is placed in the REARWARD position and the tilt lever is placed in the full TILT BACK position, retainer (16) comes in contact with detent coil (11). Refer to Illustration 4 for a pilot valve in the DETENT position.

As the bucket is rotated backward, magnet assembly (7) moves in the direction of control group (9). When magnet assembly (7) nears control group (9), the contacts in control group (8) will open. The flow of current to detent coil (11) is interrupted. Detent coil (11) will lose the electromagnetic force. Detent plunger (15) places a force on cup (17). The force assists retainer (16) away from detent coil (11). Then, the tilt lever returns to the HOLD position.

The bucket stops at the desired digging angle. The bucket will stay in this position until the tilt lever is placed in the DUMP position.

Reference: For more information on adjusting the work tool positioner, refer to the Service Manual module for Testing and Adjusting, "Work Tool Positioner - Adjust" for the machine that is being serviced.

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