Specifications, Service and Repair of Farm and Lawn Tractors

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John Deere X748 Specs

John Deere X748 Engine Specifications

Engine Model - Yanmar 3TNV76
Type - Vertical Inline Diesel Engine
Max. Rated Output (Net) - 17.9 kW (24 hp)
Combustion - System Ball Type Swirl Chamber
Aspiration - Natural
No. of Cylinders - 3
Bore x Stroke - 2.992 x 3.228 in (76 x 82 mm)
Displacement - 68.029 cu in (1.115 L)
High Idling - 3210 rpm
Engine Weight (Dry) - 242.6 lb (110 kg)
Firing Order - 1-3-2-1 (No. 1 Cylinder on Flywheel Side)
PTO Position - Flywheel Side
Direction of Rotation - Counterclockwise Viewed From Flywheel Side
Cooling System - Liquid-Cooled With Radiator
Lubricating System - Forced Lubrication With Trochoid Pump
Normal Oil Pressure at Rated Engine Speed - 42-64 psi (0.29-0.44 MPa)
Normal Oil Pressure at Low Idle Speed - 8.5 psi (0.06 MPa) or greater
Electric Starting - Starter Motor: DC12V, 1.5 hp (1.1 kW)
Alternator - DC12V, 40A
Recommended Battery Capacity - 12V, 36 Amp-Hour (5h rating)
Dimensions (L x W x H) - 19.09 x 7.17 x 21.06 in (485 x 436 x 535 mm)
Engine Oil Pan Capacity - 3.6 / 1.9 qt (3.4 / 1.8 L) (Dipstick Upper Limit / Lower Limit)
Engine Oil - PLUS-50
Engine Coolant Capacity - 0.2 gal (0.9 L)
Standard Cooling Fan - 13.19 in (335 mm) O/D, 6 Blades Pusher Type
Intake / Exhaust Valve Gap - 0.006-0.010 in (0.1-0.25 mm)
Fuel Injection Pressure - 1711-1842 psi (11.8-12.8 MPa)
Compression Pressure at 250 rpm - 498±15 psi (3.43±0.1MPa)
Thermostat - Valve Opening Temperature

Electrical System

Starter - 1.2kW (12-Volt)
Charging System - Alternator, 40 amp
Battery - 500 CCA (cold cranking amps)
12-Volt Outlet - Maximum 15 amp
Electric Starting - Starter
Alternator - DC12V
Battery Capacity - 12V, 36 Amp-Hour (5h rating)

John Deere X748 Transmission

Transmission Type - Hydrostatic transmission with Twin Touch foot pedals
Transaxle - Tuff Torq K92
Number of Speeds - Infinite
Cruise control - Standard
Reduction Ratio - 28.125:1
Axle Torque (Rated) - 882 (650) Nm (lb-ft)
Max. Tire Diameter - 660 (26) mm (in)
Brake Capacity - 1,470 (1,085) Nm (lb-ft) @ 69 Nm (51 ft-lb) Brake Arm Torque
Displacement (Pump/Motor) - 18/18 cc/rev
Max. Input Speed - 3,200 rpm
Axle Shaft Size - 30 (1.18) with Flanged Axle mm (in)
Weight (dry) - 56 (123) kg (lb)
Brake Type - Wet Disc
Housing (Case) - Die-Cast Aluminum
Gears - Heat-treated Steel Gears
Differential - Automotive-type Bevel Gears
Differential Locks - Standard, Interlocked with Brake
Auxiliary/External Hydraulic Outlets - 14.4L per minute 50 bars (725 psi) @ 3,200 rpm
Hydraulic fluid type - ISO32 Hydraulic Oil (Anti-Brake Squeal Type) - 7.5L (2WD), 7.8L (4WD)
Oil Filter - Automotive screw on type
Transaxle Oil - Low Viscosity HY-GARD (J20D)
Forward Speeds - 0 to 13.7 km/h (0 to 8.5 mph)
Reverse Speeds - 0 to 8.1 km/h (0 to 5.0 mph)

JD X748 Power Take-off

Rear PTO - Independent
Rear RPM - 540
Mid PTO - Independent
Mid RPM - 2000
Front PTO - Optional
Front RPM - 2000
PTO engagement - Electro-hydraulic

Mechanical

Chassis - Four Wheel Drive
Front axle - Cast iron
Front wheel (each) - Automatically adjusted speed
Front Drive Axle Oil - GL-5 Gear Lubricant (80W-90)
Rear Transaxle - Heavy duty
Steering - Hydrostatic power, 6-Position tilt steering wheel
Brakes - Internal wet disc
Disc Brakes - Oil immersed

JD X748 Hydraulics and Hitch

Hydraulic Pressure - 924 psi (63.7 bar)
Selective Control Valves - 2 dual SCV
Total Hydraulic Flow - 4.5 gpm (17.0 lpm)
Steering/hydraulic flow, l/min - 23.4
Rear hitch - 400 kg at liftpoints
Front hitch - Optional

Tire Sizes

Front Tire / Pressure - 18 x 8.50 - 10, Turf, 4PR / 82-110 kPa (12-16 psi)
Front Tire / Pressure - 18 x 8.50 - 10, HDAP, 4PR / 82-110 kPa (12-16 psi)
Rear Tire / Pressure - 26 x 12.00 - 12, Bar, 4PR / 40-138 kPa (6-20 psi)
Rear Tire / Pressure - 26 x 12.00 - 12, HDAP, 2PR / 40-70 kPa (6-10 psi)

Capacities

Fuel Tank - 24.6L (6.5 gal)
Transaxle (oil change with filter) - 6.6L (7.0 qt)
Cooling System - 2.8L (3.0 qt)
Engine Oil (oil change with filter) - 2.6L (2.75 qt)
Front Drive Axle - 2.4L (2.5 qt)

John Deere X748 Attachments

48X Mower Deck

Type - Mid-Mount, 3-blade
Cutting width - 48 inches (1210 mm)
Weight - 117 lbs (53 kg)
Cut height - 1 to 5.25 inch (20 to 130 mm)
Cut positions - 18
Lift - Hydraulic

54X Mower Deck

Type - Mid-Mount, 3-blade
Cutting width - 54 inches (1370 mm)
Weight - 170 lbs (77 kg)
Overall width - 64.5 inches (1630 mm)
Cut height - 1 to 5.25 inch (20 to 130 mm)
Cut positions - 18
Lift - Hydraulic

62X Mower Deck

Type - Mid-Mount, 3-blade
Cutting width - 62 inches (1570 mm)
Weight - 200 lbs (90 kg)
Cut height - 1 to 5.25 inch (20 to 130 mm)
Cut positions - 18
Lift - Hydraulic

60 Mower Deck

Type - Mid-Mount, 7-Iron, 3-blade
Cutting width - 60 inches (1520 mm)
Weight - 342 lbs (155 kg)
Overall width - 61.3 inches (1550 mm)
Cut height - 1 to 5.25 inch (20 to 130 mm)
Cut positions - 18
Lift - Hydraulic

Loader

Loader type - John Deere 45
Weight - 515 lbs (233 kg)
Height (to pin) - 73 inches (1850 mm)
Clearance, dumped bucket - 57 inches (1440 mm)
Dump reach - 23 inches (580 mm)
Dump angle - 45
Reach at ground - 44.43 inches (1120 mm)
Rollback at ground - 25
Breakout force (lift) - 770 lbs (349 kg)
Breakout force (bucket) - 740 lbs (335 kg)
Lift to full height (at pin) - 365 lbs (165 kg)
Bucket capacity - 0.2 cu yd (0.2 cu m)
Bucket width - 48 inches (1210 mm)

John Deere X748 Dimensions

Overall Height - 127 cm (50.0 in.)
Overall Width - 112 cm (46.8 in.)
Overall Length - 200 cm (78.8 in.)
Wheel Base - 141 cm (55.7 in.)
Net Weight - 505 kg (1113 lb)

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JOHN DEERE LAWN TRACTORS SPECIFICATIONS

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ENGINES FOR JOHN DEERE LAWN TRACTORS

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JOHN DEERE TRACTORS ATTACHMENTS
420 430 455 790 990
X300 X320 X330 X350 X475
X485 X500 X540 X570 X590
X700 X720 X738 X758 1023E
2025R 2210 2520 3025E 3032E
3038E 3038R 3039R 3046R 3203
3320 3520 4052R 4066R 4100
4105 4115 4200 4310 4320
4400 4410 4520 4600 4720

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JOHN DEERE FRONT END LOADERS

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JD TRACTORS TROUBLESHOOTING
2640 3040 3310 3650 4100
5050D 5090R 5410 6105R 7200R
E130 L111 LA110 LT155 X300R

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JOHN DEERE FARM TRACTORS SPECIFICATIONS

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