HOUSING A. 0T0577 - Caterpillar

Illustration 1 g01627471
(A) Extension test (B) Retraction test
Place the machine on level ground.
Allow a sufficient area to travel the machine for approximately 30 m (100 ft).
Rotate the upper structure of the machine so that the upper structure is perpendicular to the track frame. When the upper structure is in this position, the weight of the upper structure is spread equally across the undercarriage.
Travel the machine.
Extend the variable gauge cylinders while the machine travels. With a stopwatch, measure the time that is required to fully extend the variable gauge cylinders.
Travel the machine in the opposite direction and retract the variable gauge cylinders. With a stopwatch, measure the time that is required to fully retract the variable gauge cylinders.
Refer to the specifications in Table 1 for the operating speed of the variable gauge cylinders.Note: The times that are listed in 1 are given for the operation of both track frames simultaneously. Each track frame is able to be locked in position by pins. The pins are mechanical locks for the track frame in either the minimum track width or in the maximum track width. The pins can be inserted in a LOCKED position for the left side track or the right side track separately. By locking the left side track frame or the right side track frame, individual extension or retraction of the track frames can be performed. Cylinder cycle times for individual track frames are not listed.
Table 1
Cylinder Operating Speed (seconds)    
Variable Gauge     Extension     76    
Retraction 55