G102/G103, G172/G173, G252/G253 Road-vehicle transfer cases
C
K
G102 G103 1
E A
3
2
G
H
F B
D C1
The MAN transfer cases currently in use come from high-volume commercial vehicle series production. The transfer case family comprises the types G 253/G 252, G 173/G 172 and G 103/G 102, all with two ratios. All shafts and the ground gearwheels are manufactured from high-strength case-hardened grades of steel. These transfer cases are now easier to install, thanks to increased shaft spacing and the resulting reduction in the propeller shaft connection angle. Noise has been reduced by improved gear tooth patterns and stiffening of the case, and oil change intervals lengthened by installing a filter. The weight of the transfer cases in this new model range has been reduced; the G 102/G 103 in particular, which has an aluminium casing, is significantly lighter. Lubrication: G 252/G 253; G 172/G 173, G 102/G103 – the gear wheels supply oil by splash to all lubrication points. The power takeoff is lubricated by a built-in oil pump. Seals in the transfer case take the form of multiple-lip shaft sealing rings. The shaft sealing rings are protected against external damage by the narrow air gap and by additional metal rings with a labyrinth sealing effect.
There are two basic versions of MAN transfer cases: – with driver-engaged output to front axle. The rear axle is permanently driven; the output to the front axle can be engaged pneumatically, in which case the front- and rear-axle drivelines are connected rigidly together with no differential action permitting different speeds of rotation. – with permanent output to front axle. The frontand rear-axle drivelines are permanently engaged. To compensate for variations between their speeds of rotation, a spur-gear differential is installed. This differential can be locked out of action pneumatically if necessary, so that the front- and rear-axle drivelines can be connected rigidly together. Gear selection: Road/off-road ratios Differential lock Front-axle drive engaged/disengaged
– pneumatic – pneumatic – pneumatic
General information: All transfer cases are rated for use on commercial vehicles. Technical coordination is needed before they are used for other applications. Maximum operating temperature 120°C, for short periods (max. 30 minutes) 130°C. If the upper temperature limit is likely to be exceeded regularly when full performance is called for or in arduous operating conditions, an oil cooler (equipment package) will be needed. Technical details are available on request.
L
K
G172 G173 G252 G253
C
K
1
4
1
E A
3
2
G
3
H
2
G
H
D
F B
D C1
Technical data
A= B= C= C1= D= E= F= G= H= K= L=
Max. input torque, Road Off road Max. input torque for power take-off Road ratio 1 Off-road ratio Front/rear axle torque distribution Driver-engaged front axle Max. train weight Road Off-road Max. power output Weight including oil without power take-off with power take-off Oil content Power steering pump connection (optional) Overall height Housing width Housing length, top Housing length, bottom Overall length between flanges Shaft spacing, vertical Shaft offset, horizontal Distance front face of housing/front output flange Distance front face of housing/rear output flange Distance face of housing/input flange Distance front face of housing/power take-off flange Input flange Output flange to rear axle Output flange to front axle Power take-off flange Power take-off on request
G 103 G 102 Nm Nm Nm
t t kW/hp kg kg l
KV KV KV KV
ø ø ø ø
mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm
9000 5600 – 0.983 1.607 1:2.6 – – ● 36 24 220/300 151 142 – – 5.2 5.5 – 624 378 336 289 351 300 40 140 211 46 – 155 155 155 155 ●
G 173 G 172 16000 9700 8000 1.007 1.652 1:3.2 1:2.2 – – 60 42 380/520 350 383 5.8 ●
●
G 253 G 252
–
1:3.2
22000 14000 8000 0.981 1.583 1:2.2
●
–
–
100 55 550/750 403 396 436 429 8.5 9.3
340 373 7.0 ●
– ●
●
●
740 520 363 303 415 350 60 156 259 35 562 180 180 155 155
740 520 405 350 415 350 60 156 259 35 601 180 180 155 155
●
●
●
ZGG1) t
Availability with with transfer gearboxes according to output and train weight Availability cases according to output and train weight
250 90
G 252 G 253
80 70 60 50
G 172 G 173
40 36 30
G 102 G 103
20 10
570
700
830 925
1100
1250
110
132
151 176
206
240
1600
1800 1900
2100
2300
2500
2700
3500
Nm (ISO) Engine torque2)
kW (ISO)
D08
Power output kW (ISO)
D20 / D26 235
1)
Gross train weight
2)
Higher-torque operating conditions on request
MAN Commercial Vehicles Group Engines Business Unit Department MVL P.O. Box 44 02 58 90207 Nuremberg, Germany Fax: +49 (0) 911 420 1932
[email protected] www.man-mn.com/engines An MAN Group company
D113.66/E I br 08063 I Printed in Germany Text and illustrations not binding. We reserve the right to make changes in line with technical progress.
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