Hydraulic Transmission Case and Torque Converter
Torque Converter
Type Three-Element, Single-Stage, and
Two-Phase Type
Torque Ratio 2.8-3.0:1
Pressure Range 0.5-0.7 MPa (72.5-101.5 psi)
Oil Feed Pump
Type Internal Meshing Gear Type
Flow Rate 27 l/min (1.5 MPa x 2000 rpm)
7.1 g/min (217.6 psi x 2000 rpm)
Hydraulic Transmission Case
Type Power Gear Shift
Speed Ratio
Forward 17.5:1
Reverse 17.5:1
Pressure Range 1.2 to 1.5 MPa (174 to 218 psi)
Hydraulic Clutch
Brake Shoes Outer Diameter x Inner
Diameter x Thickness
125 x 81 x 2.7 mm (4.9 x 3.2 x
0.1 in.)
Brake Shoes Frictional Surface Area
71 cm
2
(11 in
2
)
Pressure Range 1.1 to 1.4 MPa (160 to 203 psi)
Weight 165 kg (363.8 lb)
Oil Capacity
Transmission (Total) 8.6 liter (9.1 qt)
Transmission (Drain and fill) 4.7 liter (5 qt)
Radiator 1 liter (1.1 qt)
Type of Oils Used Kinematic Viscosity 5-7 cSt at 212°F
(100℃ mm2/s）
CALTEX：Torque Fluid 175; RPM
torque fluid NO.5
ESSO:Torque Fluid 47
SHELL：Rotella 10w
Clean the oil filter（coarse strainer） Every 1000 hours
Replace the oil filter（fine filter） Every 250 hours
OVERVIEW
The transmission is mounted with a torque converter
and power gear-shift transmission case (see Figure 7).
The hydraulic transmission case and torque converter
provides the following advantages:
1.
The inching valve allows the truck to perform
inching operations at both high and low engine
speeds.
2.
The hydraulic clutch is equipped with four pairs
of brake shoes and steel plates that have been
specially designed to be abrasion resistant.
3.
The hydraulic clutch is mounted in the torque
converter to improve the transmission power
and efficiency.
4.
A filter is located in the hydraulic circuit, to
screen impurities from the fluid/oil and help
keep the torque converter clean and functioning.
Hydraulic Transmission Case and Torque Converter 8000 YRM 2199
10
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