Page 3-9
Dynamic Acera 03/05 Rev. 05
3. Hydraulic Components
COMPONENT
TYPE
HYDRAULIC PUMPS
Tandem, Variable Displacement,
Axial Piston with Pilot Gear Pump.
SWING MOTOR
Axial Piston
TRAVEL MOTOR
Axial Piston
CONTROL VALVES
6 Spool Multiple Control
CYLINDERS (ALL)
Double Acting
RETURN FILTER
Safety Valve containing Filter Type
OIL COOLER
Air Cooled
SK250LC-VI - PERFORMANCE SPECIFICATIONS
The following performance specifications are based on the stan-
dard machine with standard attachment.
1. Travel Speed, Swing Speed & Gradeability
DESCRIPTION
SPECIFICATION
TRAVEL SPEED
6.0 km per hr (3.7 mph) in
mode.
4.0 km per hr (2.5 mph) in
mode.
SWING SPEED
11 RPM IN M-Mode / “HI” Idle.
GRADEABILITY
70% (35°) {Limited by engine lubrication}
DRAWBAR FORCE
20,190 Kgf (44,512 lbs)
2. Engine
Engine Maker
Mitsubishi
Model
6D34-TLEB
Type
4-Cycle, Water Cooled, Direct
Injection with Turbocharger, Diesel
Number of Cylinders– Bore X Stroke
6–104 mm X 115 mm (4.09" X 4.53")
Displacement
5,861 liter (358 cu in.)
Compression Ratio
18.2 : 1
Output Rating
125 kW (168 HP) / 2,100 rpm
Maximum Torque
590 N•m (435 lb-ft)/ 1,600 rpm
Ignition Order
1–5–3–6–2–4 Clockwise Rotation
Injection Timing
17° Before Top Dead Point
Intake Valve Clearance Cold
0.4 mm (0.0157")
Exhaust Valve Clearance Cold
0.4 mm (0.0157")
Electrical System
D.C. 24 V
Starting Motor
24 V–5.0 kW
Alternator
24 V–35 A
Batteries
2– 12 V- (136 Ah)
Engine Dry Weight*
470 kg (1,040 lbs)
Thermostat
Begin to open at 76.5°C (170°F).
Full open at 90°C (194°F).
Cooling Fan Drive Method
Ø600 (Ø24") Suction Type Belt
Drive Pulley Ratio : 1.00
Air Cleaner
Dry Type with Safety Elements
*Less flywheel and electrics.
MACHINE FAMILIARIZATION
1A. MACHINE & COMPONENT WEIGHTS
The following weight specifications are based on
the standard machine with standard attachment.
COMPONENT
SK250LC-VI
COMPLETE MACHINE (STANDARD)
24,100 (53,130)
UPPER FRAME ASSEMBLY
11,400 (25,130)
COUNTERWEIGHT
5,510 (12,150)
CAB
260 (570)
BOOM CYLINDER*
220 (490) X 2
ENGINE*
480 (1,060)
RADIATOR & OIL COOLER
97 (210)
PUMP ASSEMBLY
142 (310)
CONTROL VALVE
280 (620)
FUEL TANK*
91 (200)
HYDRAULIC TANK*
143 (320)
SWING MOTOR & REDUCTION UNIT
290 (640)
LOWER FRAME ASSEMBLY
8,800 (19,400)
SLEWING RING
364 (800)
TRAVEL MOTOR & REDUCTION UNIT
300 (660) X2
IDLER ASSEMBLY
106 (230) X2
LOWER ROLLER ASSEMBLY
35 (77) X16
UPPER ROLLER ASSEMBLY
22 (48) X4
TRACK TENSION ASSEMBLY
94 (210) X2
SPROCKET
54 (120) X2
SWIVEL JOINT
30 (66)
TRACK LINK W/ 800mm (31.5") SHOES
1,490 (3,280) X2
TRACK LINK
580 (1,276) X2
ATTACHMENT (STANDARD)
3,900 (8,600)
BUCKET ASSEMBLY [0.81m
3
(1.06 cu yd)]
780 (1,720)
ARM ASSEMBLY [2.94 m (9’-8”)]
1,150 (2,540)
ARM [2.94 m (9’-8”)]
710 (1,570)
BUCKET CYLINDER*
177 (390)
IDLER LINK
25 (55) X2
BUCKET LINK
98 (220)
PIN (2 PCS for mtg bucket cyl & bucket)
80 (180)
BOOM ASSEMBLY
2.140 (4,720)
BOOM
1,670 (3,680)
ARM CYLINDER*
300 (660)
PIN (Mounting the Arm)
28 (62)
FLUIDS
550 (1,210)
HYD OIL
225 (500)
ENG OIL
20 (44)
FUEL
285 (630)
WATER
22 (48)
2X240 L/min (63.4 Gal/min)
Kgf/cm
2
(psi)
Unit: Kg (lb)
* DRY WEIGHT
WARNING
USE ONLY LIFTING DEVICES AND EQUIPMENT WITH
RATED CAPACITIES SUFFICIENT TO LIFT THE SPE-
CIFIC COMPONENT(S) BEING REMOVED OR IN-
STALLED.
4. Operating Pressures
PILOT SYSTEM
50 (710)
IMPLEMENT
350 (4980)
SWING
285 (4050)
TRAVEL
350 (4980)
POWER BOOST/HEAVY LIFT
385 (5470)
