HITCH GP-ARTICULATING 2902691 - Caterpillar

Illustration 3 g00816268
(A) Extension test (B) Retraction test
Place the machine on level ground.
Empty the bucket.
Position the upper surface of the boom parallel to the ground.
Position the stick so that the stick is perpendicular to the ground.
Fully retract the bucket cylinder.
With a stopwatch, measure the time that is required to fully extend the bucket cylinder.
Fully extend the bucket cylinder.
With a stopwatch, measure the time that is required to fully retract the bucket cylinder.
Refer to the specifications in Table 1 for the operating speed of the bucket cylinder.
Perform the following steps in order to test the operating speed of the blade cylinder.
Illustration 4 g00816277
(A) Extension test (B) Retraction test
Place the machine on level ground.
Position the stick so that the stick is perpendicular to the ground.
Lower the stick to the ground.
Fully retract the blade cylinder.
With a stopwatch, measure the time that is required to lower the blade to the ground.
Position the blade on the ground.
With a stopwatch, measure the time that is required to fully retract the blade cylinder.
Refer to the specifications in Table 1 for the operating speed of the blade cylinder.
Perform the following steps in order to test the operating speed of the boom swing cylinder.
Illustration 5 g00816286
(A) Extension test (B) Retraction test
Place the machine on level ground.
Empty the bucket.
Position the upper surface of the boom parallel to the ground.
Position the stick so that the stick is perpendicular to the ground.
Fully retract the boom swing cylinder.
With a stopwatch, measure the time that is required to fully extend the boom swing cylinder.
Fully extend the boom swing cylinder.
With a stopwatch, measure the time that is required to fully retract the boom swing cylinder.
Refer to the specifications in Table 1 for the operating speed of the boom swing cylinder.
Table 1
Cylinder Operating Speed (seconds)    
Item    New    Rebuild    Service Limit    
Boom     Extension     2.9 0.5     3.8 (1)     4.4 (1)    
Retraction 2.6 0.5     3.4 (1)     3.9 (1)    
Stick     Extension     3.6 0.5     4.7 (1)     5.4 (1)    
Retraction 2.9 0.5     3.8 (1)     4.4 (1)    
Bucket     Extension     3.1 0.5     4.0 (1)     4.7 (1)    
Retraction 2.1 0.5     2.7 (1)     3.2 (1)    
Blade     Extension     1.1 0.2     1.4 (1)     1.7 (1)    
Retraction
Boom Swing (2)     Extension     6.3 0.5     8.2 (1)     9.5 (1)    
Retraction 5.2 0.5     6.8 (1)     7.8 (1)    
Boom Swing (3)     Extension     5.2 0.5     6.8 (1)     7.8 (1)    
Retraction 4.3 0.5     5.6 (1)     6.5 (1)    
( 1 ) Maximum
( 2 ) Left hand swing (80°)
( 3 ) Left hand swing (55°)