Apparatus and method for locking an adjustable width axle assembly of a crop sprayer

A crop sprayer, comprising:

• a chassis;
• a first outer tube having a side wall which has a first aperture defined therein;
• a second outer tube having a side wall which has a second aperture defined therein, said second outer tube being offset from said first outer tube;
• a first inner tube positioned within said first outer tube, said first inner tube having a side wall;
• a second inner tube positioned within said second outer tube, said second inner tube having a side wall;
• a first contact member having a first extended position and a first retracted position, wherein (i) said first contact member is urged into contact with said side wall of said first inner tube so as to prevent movement of said first inner tube relative to said first outer tube when said first contact member is positioned in said first extended position, and (ii) said first contact member is received into said first aperture defined in said side wall of said first outer tube so as to allow said first inner tube to move relative to said first outer tube when said first contact member is positioned in said first retracted position;
• and
• a second contact member having a second extended position and a second retracted position, wherein (i) said second contact member is urged into contact with said side wall of said second inner tube so as to prevent movement of said second inner tube relative to said second outer tube when said second contact member is positioned in said second extended position, and (ii) said second contact member is received into said second aperture defined in said side wall of said second outer tube so as to allow said second inner tube to move relative to said second outer tube when said second contact member is positioned in said second retracted position,
• further comprising a first contact housing and a second contact housing, wherein:
• said first contact housing has a first central cavity defined therein,
• said first contact housing is positioned within said first aperture defined in said side wall of said first outer tube,
• said first contact member is positioned in said first contact housing when said first contact member is positioned in said first retracted position,
• said second contact housing has a second central cavity defined therein,
• said second contact housing is positioned within said second aperture defined in said side wall of said second outer tube, and
• said second contact member is positioned in said second contact housing when said second contact member is positioned in said second retracted position.