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To prevent personal injury when checks are made while the machine is in operation, make sure only approved personnel are on the machine. Keep other personnel off the machine and in view of the operator. Make sure checks are done in an open area. |
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Note: Use the information in the reference to prepare the machine for this test.
Reference: For the correct procedure to prepare the machine for this test, refer to Testing and Adjusting, "Machine Preparation for Troubleshooting" for the machine that is being serviced.
Note: For information on the swing speed, refer to Testing and Adjusting, "Swing Speed and Overswing on Level Ground - Check".
Reference: For information on the travel speed, refer to Testing and Adjusting, "Travel on Level Ground - Test".
Implements
- Make sure that the machine is resting on a smooth, level surface. The machine should be moved away from other operating machines and away from personnel.
- Permit only one operator on the machine. Keep other personnel away from the machine or in the operator's sight.
- Lower the felling head to ground when you are not testing the felling head.
- Warm the hydraulic oil to normal operating temperature. Normal operating temperature is 55 ± 5°C (130 ± 10°F).
- Test the cycle time of each function. If the function is not within the specifications that are listed in Table 1, follow steps 6 through 14 in order to adjust the cycle time for the individual function.
Show/hide table
Table 1 Cycle Times Function Time (sec) Boom Up (1) 5.7 to 6.3 Boom Down (2) 4.3 to 4.9 Stick Out (3) 4.1 to 4.7 Stick In (3) 2.9 to 3.5 Tool Tilt Down (4) 2.7 to 3.3 Tool Tilt Up (4) 2.7 to 3.3 Swing Left and Right 180° 5.0 Show/hide table( 1 ) Fully retract the tool tilt cylinder. Fully extend the stick cylinder. Place the felling head on the ground. ( 2 ) Keep the tool tilt cylinder fully retracted. Fully extend the stick cylinder. ( 3 ) Fully retract the tool tilt cylinder. Raise the felling head 1 m (3 ft) above the ground. ( 4 ) Fully extend the stick cylinder. Raise the felling head 1 m (3 ft) above the ground. Show/hide tableTable 2 Cycle Time Function Speed (mph) Forward Travel and Reverse Travel (low speed) 1.8 Forward Travel and Reverse Travel (high speed) 3.0 Note: All cycle times should be performed while the engine runs at high idle. High idle for this machine is 2200 ± 80 RPM.
- Turn the machine OFF before you make any adjustments.
- Open the cover for the engine compartment.
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| Illustration 1 | g00785429 |
- In order to adjust the cycle time of a function, the flow limiter valve on the main control valve must be adjusted for the individual function.
- Identify the correct flow limiter valve for the function that needs to be adjusted.
Show/hide table
Table 3 Identification for Flow Limiter Valves Function Flow Limiter Valve Factory Settings Number of Turns (Max) (Counterclockwise Direction) Boom Up 11 10.5 12.5 Boom Down 17 9 12.5 Stick In 16 9 12.5 Stick Out 10 12.5 12.5 Tool Tilt Up 18 12.5 12.5 Tool Tilt Down 12 11 12.5 Swing Right 7 10.25 10.5 Swing Left 13 10.25 10.5 Left Track Reverse 8 10.5 12.5 Left Track Forward 14 10.5 12.5 Right Track Reverse 9 10.5 12.5 Right Track Forward 15 10.5 12.5
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| Illustration 2 | g00787758 |
Main Control Valve (1) Tool tilt control valve. (2) Boom control valve. (3) Stick control valve. (4) Swing control valve. (5) Left travel control valve. (6) Right travel control valve. | |
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| Illustration 3 | g00787784 |
(A) Swing and travel control valves. (B) Tool tilt control valve, boom and stick control valves. (7) Swing right. (8) Left track reverse. (9) Right track reverse. (10) Stick out. (11) Boom up. (12) Tool tilt down. (13) Swing left. (14) Left track forward. (15) Right track forward. (16) Stick in. (17) Boom down. (18) Tool tilt up. | |
- Loosen the locknut for the flow limiter valve. Unscrew the locknut as far as possible. This will ensure that the locknut will not interfere while you are turning the adjustment screw for the flow limiter valve.
- Turn the adjustment screw for the flow limiter valve clockwise. Turn the adjustment screw until you feel contact between the screw and the valve spool.
- Back out the adjustment screw (turning counterclockwise). Use the specifications that are listed in Table 3 in order to set the valve properly.
- Each complete turn is equal to 1 mm (.04 inch).
Note: Do not adjust the flow limiter valve for the boom, the stick, the tool tilt, and the travel beyond 12.5 turns. The flow path of the valve spool will be reduced after 12.5 turns.
Note: Do not adjust the flow limiter valve for the swing beyond 10.5 turns. The flow path of the valve spool will be reduced after 10.5 turns.
- Tighten the locknut for the flow limiter valve.
- Follow steps 1 through 5 in order to retest the cycle time of each implement function.
Felling Head
- Make sure that the machine is resting on a smooth, level surface. The machine should be moved away from other operating machines and away from personnel.
- Permit only one operator on the machine. Keep other personnel away from the machine or in the operator's sight.
- Raise the felling head.
- Warm the hydraulic oil to normal operating temperature. Normal operating temperature is 55 ± 5°C (130 ± 10°F).
- Test the cycle time of each function. If the function is not within the specifications that are listed in Table 4, follow steps 6 through 14 in order to adjust the cycle time for the individual function.
Show/hide table
Table 4 Cycle Times Function Time (sec) Open Grapple Arms .50 Close Grapple Arms .90 Open Collector Arms .50 Close Collector Arms .90 Lateral Tilt Right 3.0 to 3.5 Lateral Tilt Left 3.0 to 3.5 Note: All cycle times should be performed while the engine runs at high idle. High idle for this machine is 2200 ± 80 RPM.
- Turn the machine OFF before you make any adjustments.
- Open the cover for the engine compartment.
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| Illustration 4 | g00785429 |
Right Side of the Machine | |
- In order to adjust the cycle time of a function, the flow limiter valve on the main control valve must be adjusted for the individual function.
- Identify the correct flow limiter valve for the function that needs to be adjusted.
Show/hide table
Table 5 Identification for Flow Limiter Valves Function Flow Limiter Valve Factory Settings Number of Turns (Max) (Counterclockwise Direction) Open Grapple Arms 23 9.5 9.5 Close Grapple Arms 22 9.5 9.5 Open Collector Arms 26 9.5 9.5 Close Collector Arms 25 9.5 9.5 Lateral Tilt Right 26 7 9.5 Lateral Tilt Left 27 7 9.5
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| Illustration 5 | g00829848 |
Main Control Valve for Felling Head (19) Grapple arms. (20) Collector arms. (21) Lateral tilt. | |
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| Illustration 6 | g00829850 |
(22) Grapple arms close. (23) Grapple arms open. (24) Collector arms close. (25) Collector arms open. (26) Lateral tilt right. (27) Lateral tilt left. | |
- Loosen the locknut for the flow limiter valve. Unscrew the locknut as far as possible. This will ensure that the locknut will not interfere while you are turning the adjustment screw for the flow limiter valve.
- Turn the adjustment screw for the flow limiter valve clockwise. Turn the adjustment screw until you feel contact between the screw and the valve spool.
- Back out the adjustment screw (turning counterclockwise). Use the specifications that are listed in Table 5 in order to set the valve properly.
- Each complete turn is equal to 1 mm (.04 inch).
Note: Do not adjust any flow limiter valve beyond 9.5 turns. The flow path of the valve spool will be reduced after 9.5 turns.
- Tighten the locknut for the flow limiter valve.
- Follow Steps 1 through 5 in order to retest the cycle time of each implement function.