5-21
5
SLEWING
TROUBLESHOOTING
The machine slews, but overruns a lot when slewing stops, or slewing cannot be stopped
1
Is the amount of overrun
when slewing stops with-
in specs?
Within specs
Normal
Out-of-specs
2
Check the pilot valve
Faulty
Repair or replace the pilot
valve
Normal
3
Check the spool opera-
tion
Faulty
Repair or replace the housing
block
Normal
4
Check the check valve of
the slew brake valve
Faulty
Repair or replace the brake
valve
Normal
5
Check the slew pressure
Pressure too low Adjust the slew relief valve
pressure
Adjust to set pressure
Pressure does not rise
Repair or replace the relief
valve
1. Is the amount of overrun when slewing stops within
specs?
“2. Service data, Performance criteria”
2. Check the pilot valve
Check if the spool of the pilot valve returns to the neu-
tral position when the operation lever (slew) is released
after operation. Disconnect the hose connecting the
pilot valve and control valve (slew block) from the con-
trol valve. Fit the pressure gauge to the hose just dis-
connected.
• Operate the lever (slew) and then release it to read
the pressure gauge.
• If the pressure is zero, the pilot valve is normal.
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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...
Страница 64: ...2 51 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 65: ...2 52 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 66: ...2 53 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 67: ...2 54 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
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...