CONTROL GP-ELECTROHYDRAULIC 3455099 - Caterpillar

Table 12
Test for the 428C and the 438C     Maximum Time (seconds)    
Loader Circuit on the Single Tilt Machine     Bucket Raise in the Dumped Position     4.2    
Loader Circuit on the Parallel Lift Machine     Bucket Raise in the Level Position     5.6    
Backhoe Circuit     Stabilizer Up     2.0    The following tests should be run from the fully raised position to the ground level implement. During the tests, the implement may hit the ground heavily. Care should be taken in order to protect the finished ground surfaces.
Table 13
Test for the 416C     Maximum Time (seconds)    
Loader Circuit on the Single Tilt Machine     Float in the Down Position and in the Dumped Position     2.7    
Loader Circuit on the Parallel Lift Machine     Float in the Down Position and in the Level Position     2.6    
Backhoe Circuit     Stabilizer Down     3.0    
Table 14
Test for the 426C and the 436C     Maximum Time (seconds)    
Loader Circuit on the Single Tilt Machine     Float in the Down Position and in the Dumped Position     2.8    
Loader Circuit on the Parallel Lift Machine     Float in the Down Position and in the Level Position     2.6    
Backhoe Circuit     Stabilizer Down     3.0    
Table 15
Test for the 428C and the 438C     Maximum Time (seconds)    
Loader Circuit on the Single Tilt Machine     Float in the Down Position and in the Dumped Position     2.8    
Loader Circuit on the Parallel Lift Machine     Float in the Down Position and in the Level Position     2.6    
Backhoe Circuit     Stabilizer Down     1.5    For the final two tests, position the boom at a 45° angle from the horizontal position. Fully extend the stick and move the bucket to the fully curled position. If the extendable stick has been factory installed, then fully retract the extendable stick. Then, move the boom control lever to the full boom LOWER. Measure the time until the bucket hits the ground. In order to measure the pause time for the boom, keep the control lever in the boom LOWER operation. Start the time, when the bucket hits the ground. Stop the time, when the rear of the machine begins to raise.
Table 16
Test for the 416C, 428C, and 438C     Maximum Time (seconds)    
Backhoe Circuit     Boom Lower     1.3 to 2.1    
Pause Time for the Boom .5    
Boom Raise from the Ground to the Snubber 2.2    
Boom Raise from the Ground to the Stop 3.2    
Table 17
Test for the 426C and the 436C     Maximum Time (seconds)    
Backhoe Circuit     Boom Lower     1.3 to 2.1    
Pause Time for the Boom 0.5    
Boom Raise from the Ground to the Snubber 2.4    
Boom Raise from the Ground to the Stop 3.4    If the cylinder speeds are not correct, then do the following steps.
Check