Technical Data
9-4
TRANSMISSION
Make/Model.................................................ZF 6WG 310 RPC Automatic with manual override.
The transmission assembly consists of a torque converter close-coupled to a countershaft-type gearbox with
integral output transfer gearing. There is an automatic shifting throughout the range with a kickdown feature.
Lockup action in all forward gears. A torque proportioning output differential transmits drive permanently to the
front and rear axles. This differential may be locked by the operator for use in difficult traction conditions. There
is a standard integral hydraulic retarder which automatically operates should the engine overspeed. A blocked
filter indicator and filter bypass system provide valve block with additional protection from unfiltered oil.
Pressures:
Main..............................................................16 + 2 bar (232 + 30 lbf/in²)
Lockup (Wk).................................................12 ± 2 bar (174 ± 30 lbf/in²)
Converter 'IN’...............................................10.5 bar (152 lbf/in²) at 2300 rev/min.
Converter 'OUT’...........................................4.8 bar (70 lbf/in²) at 2300 rev/min.
Converter Relief Valve.................................8.5 bar (123 lbf/in²)
Retarder.......................................................4.5 bar (65 lbf/in²)
Temperatures:
Normal..........................................................80° - 110° C (176° - 230° F)
Maximum (Retarder Mode)..........................145° C (293° F)
Stall Speed...................................................1805 rev/min.
Ratios:
Torque Converter........................................1.84:1
Transmission.................................................Refer to table below
AXLES
There are three heavy duty axles with fully floating axle shafts and outboard planetary reduction gearing. The
three axles are in permanent all wheel drive (6x6) with a differential coupling between the front and rear axles.
All three axles also have hydraulically actuated multiple transverse diff-lock differentials for 100% cross-axle
lock up. The inter-axle and cross-axle diff-locks are controlled by the operator, and can be actuated when
required in poor traction conditions.
Differential ...................................................3.875:1
Planetary .....................................................5.71:1
Total Reduction............................................22.12:1
Forward
Gear 1 2 3 4 5 6
km/h 5.6 8.6 13.3 20.6 30.2 50.0
mile/h 3.5 5.4 8.3 12.8 18.8 31.1
Reverse
Gear 1 2 3
km/h 5.6 13.3 30.2
mile/h 3.5 8.3 18.8
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