 |
|
Unexpected operation of the auxiliary control circuit can cause injury or death. To avoid unexpected operation of the auxiliary control circuit, always put the auxiliary control pedal in the locked position while traveling or whenever the auxiliary lines are not being used. |
Primary Auxiliary Hydraulic Circuit
| |
| Illustration 1 | g01123468 |
| |
| Illustration 2 | g01123471 |
There are two auxiliary lines that are routed to the stick.
The line (1) that is located on the right side of the stick is for oil feed. The line (2) that is located on the left side of the stick is used as a return line.
The auxiliary lines are equipped with coupler assemblies. Wipe all coupler assemblies before you connect the work tools.
The auxiliary lines must be relieved of pressure in order to connect the coupler assemblies to the work tool. Relieve the pressure in the auxiliary hydraulic lines by performing the following steps:
- With the accumulator charged and the hydraulic lockout control lowered, turn the engine start key to the ON position. Do not start the engine. 302.5C only
- Operate the auxiliary control in both directions.
- Turn the engine start switch key to the OFF position. 302.5C only
The hydraulic lines only provide one-way hydraulic flow. If the machine is equipped with a flow control valve, two-way hydraulic flow is possible. Refer to "Work Tool Flow Mode Control".
Secondary Auxiliary Hydraulic Circuit
| |
| Illustration 3 | g01162512 |
|
(A) Open
(B) Closed | |
| |
| Illustration 4 | g01162513 |
A diverter valve is used to divert oil from the bucket cylinder to the auxiliary lines. This valve is attached to the right side of the stick. The second auxiliary circuit is open when the handle (3) is in position A. The second auxiliary circuit is closed when the handle (3) is in position B.
The line (4) that is located on the right side of the stick is for oil feed. The line (5) that is located on the left side of the stick is used as a return line.
| |
| Illustration 5 | g01163145 |
|
One-Way Flow (6) - Move lever (8) to this position when one-way flow is required. |
|
Two-Way Flow (7) - Move lever (8) to this position when two-way flow is required. |
| |
| Illustration 6 | g01163125 |
|
The auxiliary control pedal is shown in the UNLOCK position. This configuration is used on the 301.6C and also used on the 301.8C. | |
The left pedal (9) is the auxiliary control pedal.
The auxiliary control pedal is hinged. Operate the auxiliary control pedal by folding the pedal to the UNLOCK position. Fold the pedal to the LOCK position when the pedal is not being used.
In order to pressurize the line that is connected to the left hand side of the stick, apply pressure to the left side of pedal (9).
In order to pressurize the line that is connected to the right hand side of the stick, apply pressure to the right side of pedal (9).
| |
| Illustration 7 | g01163147 |
|
This configuration is used on the 302.5C. | |
The switch (10) on the right joystick is the auxiliary control.
In order to pressurize the line that is connected to the right hand side of the stick, push switch (10) upward.
In order to pressurize the line that is connected to the left hand side of the stick, push switch (10) downward.
Move lever (8) for the work tool flow mode control to the position for one-way flow (6). Connect the hammer lines to the correct connectors.
| |
| Illustration 8 | g01163151 |
|
This configuration is used on the 301.6C and also used on the 301.8C. | |
Hydraulic Hammer ON - Push down on the right side of the control pedal in order to activate the hydraulic hammer.
Hydraulic Hammer OFF - Release the control pedal in order to deactivate the hydraulic hammer.
| |
| Illustration 9 | g01163175 |
|
This configuration is used on the 302.5C. | |
Hydraulic Hammer ON - Push the switch upward in order to activate the hydraulic hammer.
Hydraulic Hammer OFF - Release the switch in order to deactivate the hydraulic hammer.