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5-37
5
BUCKET
TROUBLESHOOTING
4. Test by replacing the port relief valve
Replace the port relief valve in question with a port re-
lief valve used for a normal boom. If the bucket cylinder
operates normally with the replacement valve, the port
relief valve used on the bucket side is faulty.
5. Check the bucket cylinder
Switch between the arm hose and the bucket hose
connected to the piping at the boom foot.
• Move the lever (arm) to operate the bucket cylinder.
• If the cylinder fails to operate, it is faulty.
Before performing the steps above, fully extend the
bucket cylinder, completely retract the arm cylinder
and lower the bucket to the ground.
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Содержание TB 250
Страница 1: ......
Страница 3: ...1 1 SAFETY 1 Safety alert symbol 1 2 Safety precautions 1 3 Cautions when working 1 9...
Страница 36: ...2 24 2 TIGHTENING TORQUE SERVICE DATA...
Страница 37: ...2 25 2 SERVICE DATA HYDRAULIC CIRCUIT DIAGRAM HYDRAULIC CIRCUIT DIAGRAM Equipped with options 1 2...
Страница 38: ...2 26 2 HYDRAULIC CIRCUIT DIAGRAM SERVICE DATA Equipped with options 2 2...
Страница 39: ...2 27 2 HYDRAULIC CIRCUIT DIAGRAM SERVICE DATA Equipped with angle blade and blade oat 1 2...
Страница 40: ...2 28 2 HYDRAULIC CIRCUIT DIAGRAM SERVICE DATA Equipped with angle blade and blade oat 2 2...
Страница 41: ...2 29 2 HYDRAULIC CIRCUIT DIAGRAM SERVICE DATA Equipped with high ow option 1 2...
Страница 42: ...2 30 2 HYDRAULIC CIRCUIT DIAGRAM SERVICE DATA Equipped with high ow option 2 2...
Страница 43: ...2 31 2 HYDRAULIC CIRCUIT DIAGRAM SERVICE DATA Equipped with high ow angle blade blade oat option 1 2...
Страница 44: ...2 32 2 HYDRAULIC CIRCUIT DIAGRAM SERVICE DATA Equipped with high ow angle blade blade oat option 2 2...
Страница 46: ...2 34 2 ELECTRIC CIRCUIT DIAGRAM SERVICE DATA First auxiliary hydraulic piping with proportional control...
Страница 49: ......
Страница 59: ...2 46 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 60: ...2 47 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 61: ...2 48 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 62: ...2 49 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 63: ...2 50 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
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Страница 65: ...2 52 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
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Страница 68: ...2 55 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 69: ...2 56 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 70: ...2 57 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 71: ...2 58 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 72: ...2 59 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 73: ...2 60 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA NAME STANDARD NO...
Страница 74: ...2 61 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 75: ...2 62 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 76: ...2 63 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 77: ...2 64 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 78: ...2 65 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 79: ...2 66 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 80: ...2 67 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 81: ...2 68 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 92: ...3 11 3 CONTROL VALVE FUNCTION...
Страница 108: ...4 3 4 SERVICE STANDARDS DISASSEMBLY AND ASSEMBLY Clearance for pin and bushing...
Страница 130: ...4 25 4 UPPER FRAME DISASSEMBLY AND ASSEMBLY 15 Side frame R 16 Side frame L 17 Tool box 18 Cover 19 Bracket 20 Cover 2 2...
Страница 165: ...4 60 4 HYDRAULIC PUMP DISASSEMBLY AND ASSEMBLY f Remove the plug g Remove the spring and the ball...
Страница 267: ...4 162 4 SLEW MOTOR DISASSEMBLY AND ASSEMBLY Special tools Oil seal press tting jig A Collar installation jig B...
Страница 352: ...ENGINE 6 Machine model Mounted engine TB250 4TNV88...