John Deere 495D Specifications
495D EXCAVATOR 26,184 lb (11 877 kg)
Transport Height.......................................................7 ft 5 in. (2.25 m)
Transport Length......................................................23 ft 3 in. (7.08 m)
Machine Width ..........................................................9 ft 6 in. (2.89 m)
ENGINE......................................................................John Deere 300 Series
Number of Cylinders and Displacement ..............................4 cylinders, 276 cu in. (4.5 L)
Air Intake System.................................................................Turbocharged
Bore and Stroke................................................................... 4.19 x 5.00 in. (106.4 x 127 mm)
Compression Ratio ..............................................................17.2 to 1
Net hp:
At 2100 rpm (Dig Mode) ...............................................95 SAE hp (71 kW)
At 2300 rpm (Travel Mode)...........................................100 SAE hp (75 kW)
Maximum Torque at 1300 rpm............................................. 284 lb-ft (385 N•m)
Nozzle Opening Pressure:
New .............................................................................. 3820 ± 40 psi (26 340 ± 275 kPa)
Used .............................................................................3620 ± 40 psi (25 000 ± 275 kPa)
Valve Clearance (Cold):
Intake............................................................................0.014 in. (0.36 mm)
Exhaust ........................................................................0.018 in. (0.46 mm)
Oil Pressure at Fast Idle ...................................................... 50 ± 15 psi (345 ± 100 kPa)
Static Injection Pump Static Timing......................................Line on governor weight retainer aligned with line on cam
ring with No. 1 piston at TDC
Dynamic Injection Pump Timing at
Rated Load rpm*:
4276D:
Dig Mode .........................................NA
Travel Mode.....................................16 + 0 - 1° BTDC
4045D:
Dig Mode .........................................NA
Travel Mode.....................................16 + 0 - 1° BTDC
Speeds:
Slow Idle.......................................................................1000 ± 25 rpm
Fast Idle (Propel Mode) ................................................ 2475—2500 rpm
Rated Full Load (Dig Mode) .........................................2300 + 25 - 50 rpm
Rated Full Load (Travel Mode).....................................2300 rpm
Turbocharged Boost Pressure
at Rated Full Load
(Minimum w/4045T Metric Engine).................................. 9 psi (62 kPa)
Cylinder Pressure (Compression Min).................................350 psi (2415 kPa)
Number of Flywheel Teeth................................................... 129
Electrical System .................................................................24 volt
Alternator ............................................................................. 42 amp
Cooling System Pressure ....................................................10 psi (69 kPa)
Note: *For latest information, see Dealer Technical Assistance Center (DTAC) Solution K000413.
POWER TRAIN
Transmission ....................................................................... Constant mesh with high and low speed ranges.
Pressurized lubrication system.
Travel Motor.........................................................................A bent axis, axial piston variable displacement motor.
Travel Brake ........................................................................ Air over hydraulic shoe type brakes in each wheel.
Park Brake...........................................................................Air actuated drum type on transmission output shaft.
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HYDRAULIC SYSTEM—Open-Center
Main Pump:
Type.............................................................................. 2 variable-displacement axial-piston
System Pressure—Travel.............................................4620 ± 150 psi (31 855 ± 1035 kPa)
System Pressure—Digging .......................................... 4050 ± 150 psi (27,925 ± 1035 kPa)
Minimum Flow .............................................................. 28 gpm (106 L/min) used at 2500 psi (17237 kPa) and
2200 rpm
Steering Pump:
Type.............................................................................. Gear
System Pressure ..........................................................1775 ± 25 psi (12 300 ± 175 kPa) at fast idle
System Crossover Relief Valve ....................................2465 psi (17 000 kPa)
Minimum Flow ..............................................................5.7 gpm (21.64 L/min) used at 1775 psi (12 300 kPa) and
2100 rpm
Pilot Pump:
Type.............................................................................. Gear
System Pressure ..........................................................640 ± 70 psi (4410 ± 480 kPa) at fast idle
Minimum Flow .............................................................. 5.5 gpm (20.8 L/min) at 2200 rpm
RELIEF VALVE SETTINGS
Boom I (Head and Rod) Front Pump ................................... 4260 + 140 - 0 psi (29 372 + 965 - 0 kPa)
Arm I (Head and Rod) Rear Pump ......................................4260 + 140 - 0 psi (29 372 + 965 - 0 kPa)
Bucket (Head and Rod) Front Pump ...................................4770 + 140 - 0 psi (32 888 + 965 - 0 kPa)
Rear or Blade Stabilizer
(Head and Rod) Rear Pump............................................ 4260 + 140 - 0 psi (32 888 + 965 - 0 kPa)
Swing Brake Valve Circuit Relief Valve Left and
Right (Crossover Relief) Rear Pump............................... 3340 ± 140 psi (23 030 ± 965 kPa)
CYCLE TIMES (At Fast Idle)
Function New Machine Max Allowable
Boom Raise .........................................................................2.7 ± 0.3 sec 3.5 sec
Boom Lower ........................................................................2.3 ± 9.3 sec 3.0 sec
Arm Out ...............................................................................2.1 ± 0.3 sec 2.8 sec
Arm In .................................................................................. 3.3 ± 0.4 sec 4.2 sec
Bucket Roll-Out ...................................................................2.2 ± 0.3 sec 2.9 sec
Bucket Roll-In ......................................................................3.6 ± 0.3 sec 4.5 sec
Swing (3 Revolutions).......................................................... 12.5 ± 1.0 sec 16.2 sec
Stabilizer Extend.................................................................. 1.54 ± 0.3 sec 2 sec
Stabilizer Retract.................................................................. 1.41 ± 0.3 sec 1.83 sec
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