NOTICE
In cold temperatures (ambient temperature below 0°C ), even when the hydraulic oil temperature caution
lamp displays the proper temperature, perform the "Hydraulic system warm-up operation in cold weath-
er" to warm up all the hydraulic equipment.
12. Hydraulic system warm-up operation in cold weather
1) Turn fuel control dial (4) to High idle (MAX) position.
2) Repeat the work equipment operation of step 6 for 3 to 5 minutes.
• Display (A) when temperature is proper: Caution
lamp background (C) is blue.
• Display (B) when temperature is low: Caution
lamp background (C) is white.
3) Check that the hydraulic oil temperature caution lamp
displays proper temperature.
If it is not displaying the proper temperature, repeat
step 2) until hydraulic oil temperature caution lamp (7)
displays the proper temperature.
13. Before starting the work, check that fuel control dial (4) is
at a position midway between Low idle (MIN) and High idle
(MAX).
If it is not at the midway position, set it to the midway posi-
tion and run the engine at a mid-range speed before oper-
ating.
14. Before starting actual work, repeat the following operation
3 to 5 times.
Circulate warm hydraulic oil through all control circuits.
• Boom operation: RAISE (E) ←→ LOWER (F)
• Arm operation: IN (B) ←→ OUT (A)
• Bucket operation: CURL (D) ←→ DUMP (C)
• Swing operation: LEFT (G) ←→ RIGHT (H)
OPERATION
MACHINE OPERATIONS AND CONTROLS
3-183
Содержание PC490-11
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Страница 25: ...LOCATION OF SAFETY LABELS a b c d e f g h KS000848 T T SAFETY SAFETY LABELS 2 5...
Страница 48: ...Map with mirror and rear view camera visibility aids fitted PRECAUTIONS FOR OPERATION SAFETY 2 28...
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Страница 73: ...OPERATION Please read and make sure that you understand the SAFETY section before reading this section 3 1...
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Страница 341: ...MAINTENANCE Please read and make sure that you understand the SAFETY section before reading this section 4 1...
Страница 421: ...SPECIFICATIONS 5 1...
Страница 425: ...6 7m Boom PC490 11 SPECIFICATIONS SPECIFICATIONS 5 5...
Страница 426: ...6 7m Boom PC490LC 11 SPECIFICATIONS SPECIFICATIONS 5 6...
Страница 428: ...7 1m Boom PC490 11 SPECIFICATIONS SPECIFICATIONS 5 8...
Страница 429: ...7 1m Boom PC490LC 11 SPECIFICATIONS SPECIFICATIONS 5 9...
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Страница 475: ...REPLACEMENT PARTS 7 1...
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Страница 492: ...PC490 11 PC490LC 11 HYDRAULIC EXCAVATOR Form No UENAM01105 2016 KOMATSU All Rights Reserved Printed in Belgium 11 2016...