Hydraulic Transmission Case And Torque Converter; Overview - Yale A7S1 Service Manual

Hydraulic Transmission Case and Torque Converter

Hydraulic Transmission Case and Torque Converter
Torque Converter
Oil Feed Pump
Hydraulic Transmission Case
Hydraulic Clutch
Weight
Oil Capacity
Type of Oils Used
Clean the oil filter（coarse strainer）
Replace the oil filter（fine filter）

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.
10
Type
Torque Ratio
Pressure Range
Type
Flow Rate
Type
Forward
Speed Ratio
Reverse
Pressure Range
Brake Shoes Outer Diameter x Inner
Diameter x Thickness
Brake Shoes Frictional Surface Area 71 cm
Pressure Range
Transmission (Total)
Transmission (Drain and fill)
Radiator
2. The hydraulic clutch is equipped with four pairs
3. The hydraulic clutch is mounted in the torque
4. A filter is located in the hydraulic circuit, to
Three-Element, Single-Stage, and
Two-Phase Type
2.8-3.0:1
0.5-0.7 MPa (72.5-101.5 psi)
Internal Meshing Gear Type
27 l/min (1.5 MPa x 2000 rpm)
7.1 g/min (217.6 psi x 2000 rpm)
Power Gear Shift
17.5:1
17.5:1
1.2 to 1.5 MPa (174 to 218 psi)
125 x 81 x 2.7 mm (4.9 x 3.2 x
0.1 in.)
2
(11 in
1.1 to 1.4 MPa (160 to 203 psi)
165 kg (363.8 lb)
8.6 liter (9.1 qt)
4.7 liter (5 qt)
1 liter (1.1 qt)
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
Every 1000 hours
Every 250 hours
of brake shoes and steel plates that have been
specially designed to be abrasion resistant.
converter to improve the transmission power
and efficiency.
screen impurities from the fluid/oil and help
keep the torque converter clean and functioning.
8000 YRM 2199
2
)