Enclosed cab, broader vision, driving indoor noise reduced, in line with state regulations, increased reliability, the assembly of a new shock absorber, thereby greatly increasing the driver's cab of the seismic effect. Single-stage three components torque converter, parallel Coaxial transmission, high reliability, transmission, torque converter separated structure, performance, reliability, easy maintenance. With Meichi bridge, reliability function. Shifting to a full hydraulic steering, manipulation of flexible, lightweight. Light flexible manipulation, Cat hydraulic valve, stable quality, reliable and improve the performance of the hydraulic systemStructural design of the limited use of FEA analysis, to override condition Compatibility Xichai 6110 engine, re-optimization, match and enhance the effective power, an increase of operating power and performance to the cooling system was optimized design, upgrading the cooling system performance, extended the life of components, to strengthen growth A cold-start capability.
Wheel loader 639 SERIES Specifications
Engine

XC6110/12G5-SG90	For639only
Ratedspeed	2300rpm
Ratedpower	92kw
Cylinderbore×stroke	110mm×125mm
Max.torque	460n.m
Displacemnt	7.13L

Powertrain

Torqueconverter	3-element,singlestage
TransmissionSEMTRN150	countershaft
Gearshift	Ι	ΙΙ	ΙΙΙ	IV
Forward	7.4	13.7	25.3	41.5(km/h)
Reverse	9.3	30.5

Axle
Fourwheeldrive,frontaxlefied,rearaxleoscillating,osciilatingangleofrearaxle+-12°
Hydraulic system

Workingpressure	16.5MPa
Boomliftingtime	4.82s
Bucketdumpingtime	1.07s
Boomloweringtime	3.24s
Pilotcontrolling	For638only

Brake system

Servicebrake	Airassistedoildisc typefourwheelbrake
Parkingbrake	Hooftype
Brake system	1.7m3

Steering system
Pivoting angle of frame 38 degree
Load sensing hydraulic steering system
Tank capacity

Fueltank	51L
Hydraulictank	138L

Tire

Size	17.5-25
P.R.	12
Pattern	L3/E3
Operating weight	9620kg
Performance specifications
Breakoutforce	128kn
Max.rim-pull	90.8kn