5-10t Internal Combustion Counterbalance Forklift Truck Operation & Maintenance Manual
4. Drive Axle
Refer to Table 4-1 for main parameters of drive axle.
Table 4-1
Forklift Truck Tonnage
Item
5-7t 8-10t
Type of Drive Axle
Full Floating Type and Cast Steel
Axle
Type Spiral Bevel Gear Type Main
Transmission
Reduction Ratio 4.875 6.33
Type Planetary Gear Type Wheel-sided
Reducer
Reduction Ratio 4.25 3.67
Total Reduction Ratio 20.72 23.23
Main Transmission and Speed
Differential
10 I
Oil Capacity
Wheel-sided Reducer
Left and
Right 8 I in
Total
Left and
Right 10 I in
Total
Tyre (Two for Left and Right,
Respectively)
8.25-15-14PR 9.00-20-14PR
Wheel Rim 6.50-15 7.0-20
Wheel
Air Pressure kPa 830 760
4.1 Overview
Drive axle is composed of main transmission, speed differential, wheel-sided reducer, and
wheel brake, etc. Refer to Fig 4-1 and Fig 4-2. The drive axle is coupled with the sector plate
in front part of truck frame using bolts, while mast is mounted on the drive axle housing.
4.2 Main Transmission and Speed Differential
Main transmission and speed differential are mainly comprised of left and right differential
cases, gear ring (spiral bevel gear), and driving pinion, etc, and they are all mounted inside the
case of main transmission, as indicated in Fig 4-3.
The speed differential is in split type. The left and right differential cases are coupled with
each other using bolts, with half-shaft gear and the planetary gear (fixed onto the cross shaft)
assembled inside, and these two types of gears are mutually engaged.
The driving pinion shaft is supported by two tapered roller bearings fitted inside the bearing
seat. The bearing seat is fixed with the case of main transmission using gasket and padding.
The gear ring is in a spiral bevel gear type, and it is prized onto the right differential case
using bolts, while the speed is reduced for the power transmitted from transmission through
pinion (shaft) and gear ring.
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