14M3 Motor Grader Machine Systems Caterpillar

Cylinder Cycle Time - Check

Usage:

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Table 1
Required Tools
A Stopwatch or Timer	1

Note: Before you perform this check, refer to Testing and Adjusting, "Machine Preparation".

Use Table 2 to determine the correct cylinder cycle times. Choose the column that has the cycle times for your Motor Grader. Record the actual cycle times in the column that is on the right side of the table. The cycle times that are shown in Table 2 are in seconds.

For most cylinders, a test cycle is the full range of movement. For the following cylinders, a test cycle is movement through a 305 mm (12.0 inch) distance: blade lift cylinders and ripper cylinder. For the circle, a test cycle is 1/4 of one full rotation.

All the checks of the implement cycle times must be performed at high idle. The hydraulic oil must be at normal operating temperature. Ensure that the cylinder bears no additional loads. The following causes will create additional loads: interference from other machine components, contact with foreign objects and contact with the ground.

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Table 2
Implement Cycle Times for Motor Graders
Implement	Action	Implement Cycle Times	Actual Implement Cycle Times
Implement	Action	14M Series 3	Actual Implement Cycle Times
Blade Lift	Rod In⁽¹⁾ Rod Out⁽¹⁾	3.0 ± 1.0 3.0 ± 1.0
Centershift	Rod In⁽²⁾ Rod Out⁽²⁾	5.5 ± 2.0 6.5 ± 2.0
Wheel Lean	Rod In⁽²⁾ Rod Out⁽²⁾	2.0 ± 0.5 2.5 ± 1.0
Blade Tip	Rod In⁽²⁾ Rod Out⁽²⁾	6.0 ± 2.0 5.5 ± 1.5
Sideshift	Rod In⁽²⁾ Rod Out⁽²⁾	16.0 ± 4.0 16.0 ± 4.0
Ripper (If Equipped) B9J1-Up, ; B9H1-Up, ; R9J1-215, ; R9H1-201	Rod In⁽¹⁾ Rod Out⁽¹⁾	4.5 ± 1.5 5.5 ± 1.5
Ripper (If Equipped) R9J216-Up, ; R9H202-Up, ; N9Y1-Up, ; E9Y1-Up, ; N9A1-Up, ; E9W1-Up	Rod In⁽¹⁾ Rod Out⁽¹⁾	3.5 ± 1.0 4.0 ± 1.5
Articulation	Left⁽²⁾ ⁽³⁾ Right⁽²⁾ ⁽³⁾	4.0 ± 1.0 4.0 ± 1.0
Blade Circle	1/4 Rotation	13.0 ± 4.0

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⁽¹⁾	Cycle times are for a “running distance” of 305 mm (12 inch).
⁽²⁾	Cycle time is through full travel.
⁽³⁾	When you check the cycle times for these cylinders, operate the machine at high idle and in the FIRST SPEED position. The differential must be unlocked.

Procedure To Check Blade Lift Cycle Times and Ripper (If Equipped) Cycle Times

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Table 3
Required Tools
A Stopwatch or Timer	1
1U-9366 Automatic Tape Measure	1

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Illustration 1	g01373871
(1) Cylinder rod (2) Marks (3) Tape measure (A) Running distance

Raise the implement that needs to be checked to the maximum height.
Place a mark on the rod. Place the mark just below the cylinder head. Use ink to create all marks. Do not create marks by scratching or by scoring.
Use the stopwatch to determine the time that is required to lower the cylinder by 305 mm (12.0 inch). Use the tape measure to determine 305 mm (12.0 inch) of movement. Use the mark as a reference.
Position the implement just above the ground.
Place two marks on the rod. Place the marks 305 mm (12.0 inch) away from each other.
Use the stopwatch to determine the time that is required to raise the cylinder by 305 mm (12.0 inch). Use the marks for reference.