Left side front windshield lock designed for excavator models PC556607078 and SY55 759. This directfit front window lock replaces the leftside lock mechanism to secure the cab windshield and maintain proper window positioning during operation and transport. Key benefits Secure window locking: Holds the front windshield closed to prevent unwanted opening from vibration, wind, or debris. Direct compatibility: Specifically made to fit left side of the listed excavator models for an accurate replacement without modification. Reliable operation: Smooth locking and unlocking function to support daily use and reduce the risk of loose or rattling windows. Durable construction: Built for worksite conditions to provide long service life and consistent performance. Features and attributes Function: Front windshield lock for left side window; designed to latch and hold the window in the closed position. Compatibility: Fits excavator models PC556607078 and SY55 759 as a leftside replacement part. Size: Left side configuration to match original equipment orientation. Performance: Provides secure engagement under typical operating loads and repeated cycles of use. Installation: Designed as a straightforward replacement for the left front window lock; compatible mounting points and fitment reduce installation time. Typical use scenarios Onsite operation: Prevents the front windshield from opening or shifting while digging, lifting, or traveling over uneven ground. Transport and towing: Keeps the cab window securely latched during transport between job sites to limit wind intrusion and movement. Maintenance and parts replacement: Used by service technicians replacing a worn, damaged, or missing leftside front window lock to restore proper window function. This left front windshield lock is a practical replacement component for maintaining the cab integrity and reliable window operation on compatible excavator models.