Working machine

A working machine comprising:

• a machine body;
• a left traveling device provided on a left portion of the machine body;
• a right traveling device provided on a right portion of the machine body;
• a left traveling motor configured to output power to the left traveling device;
• a right traveling motor configured to output power to the right traveling device;
• a left traveling pump, including a first pressure-receiving portion and a second pressure-receiving portion, configured to
• normally rotate the left traveling motor when operation fluid is applied to the first pressure-receiving portion, and
• reversely rotate the left traveling motor when operation fluid is applied to the second pressure-receiving portion;
• a right traveling pump, including a third pressure-receiving portion and a fourth pressure-receiving portion, configured to
• normally rotate the right traveling motor when operation fluid is applied to the third pressure-receiving portion, and
• reversely rotate the right traveling motor when operation fluid is applied to the fourth pressure-receiving portion;
• a traveling operation device including a traveling operation member and a plurality of operating valves to be actuated according to operation of the traveling operation member and configured to apply the operation fluid to at least any one of the first, second, third and fourth pressure-receiving portions according to operation of the traveling operation member;
• an actuation valve configured to supply operation fluid to the traveling operation device, and change a pressure of the operation fluid supplied therefrom to the traveling operation device;
• a first fluid passage fluidly connecting the plurality of operating valves of the traveling operation device to an output side of the actuation valve;
• a first traveling fluid passage fluidly connected to the first pressure-receiving portion and configured so that the operation fluid to be applied to the first pressure-receiving portion flows through the first traveling fluid passage when the traveling operation member is operated;
• a second traveling fluid passage fluidly connected to the second pressure-receiving portion and configured so that the operation fluid to be applied to the second pressure-receiving portion flows through the second traveling fluid passage when the traveling operation member is operated;
• a third traveling fluid passage fluidly connected to the third pressure-receiving portion and configured so that the operation fluid to be applied to the third pressure-receiving portion flows through the third traveling fluid passage when the traveling operation member is operated;
• a fourth traveling fluid passage fluidly connected to the fourth pressure-receiving portion and configured so that the operation fluid to be applied to the fourth pressure-receiving portion flows through the fourth traveling fluid passage when the traveling operation member is operated;
• a second fluid passage branching from a first intermediate portion of the first fluid passage and fluidly connecting the first intermediate portion of the first fluid passage to the first traveling fluid passage;
• and
• a third fluid passage branching from a second intermediate portion of the first fluid passage and fluidly connecting the second intermediate portion of the first fluid passage to the third traveling fluid passage.