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2-17
2
PERFORMANCE CRITERIA
SERVICE DATA
Natural travel drop
• Engine:
Stopped
• Hydraulic oil temp.:
50~60°C
• Gradient:
15°
• Measurement posture: Fully extend the boom, arm and
bucket cylinders and completely retract the dozer blade
cylinder.
• With the excavator parked at angle for 5 minutes, mea-
sure the extent of natural drop.
Slew time
• Engine:
Maximum R. P. M.
• Hydraulic oil temp.:
50~60°C
• Measurement posture: Completely retract the arm cyl-
inder, fully extend the bucket cylinder and adjust so that
boom foot pin and bucket pin are at matching height.
Rest the dozer blade on the ground.
• With the hoe attachment in a no-load state, wait 1 rota-
tion, then measure the time required for the next 2 rota-
tions.
Overrun when slewing stops
• Engine:
Maximum R. P. M.
• Hydraulic oil temp.:
50~60°C
• Measurement posture: Same as that for measuring slew
time.
• Draw matching marks on the outer race of the slew
bearing and lower frame at an exactly 180 degrees rota-
tion from the starting point. With the hoe attachment in a
no-load state, rotate 180 degrees at, which point return
the operation lever to neutral. Measure the differential
between the position marks and the point the hoe at-
tachment stops.
Natural slew drop
• Engine:
Stopped
• Hydraulic oil temp.:
50~60°C
• Gradient:
15°
• Measurement posture: Same as that for measuring slew
time.
• Rotate the upper machinery so that it is directly abeam
of the grade, then draw positional marks on the slew
bearing’s outer race and the lower frame. Then measure
the distance that develops between the marks after 5
minutes.
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...
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Страница 59: ...2 46 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
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Страница 73: ...2 60 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA NAME STANDARD NO...
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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...