BASE AS. 1463270 - Caterpillar

Introduction
Illustration 1 g00274315
Location of the components in the all wheel drive system (1) All wheel drive accumulator (two) (2) All wheel drive control valve (3) Wheel drive (right side) (4) Electronic control module (5) All wheel drive control switch (6) All wheel drive gear pump (7) Hydraulic and steering pump (8) Hydraulic oil tank (9) Hydraulic oil cooler (10) Wheel drive (left side) (11) Flushing and cooling control valve (12) Torque control (13) Filter (14) Ground speed sensor (15) All wheel drive piston pump
Illustration 2 g00274317
Circuit for the all wheel drive system (1) All wheel drive accumulator (two) (2) All wheel drive control valve (3) Wheel drive (right side) (6) All wheel drive gear pump (7) Hydraulic and steering pump (9) Hydraulic oil cooler (10) Wheel drive (left side) (11) Flushing and cooling control valve (13) Filter (15) All wheel drive piston pumpAll wheel drive refers to the addition of a microprocessor that is based on the all wheel drive system on the all wheel drive motor grader. The system is operable in the following gears:
First speed forward through seventh speed forward.
First speed reverse through fifth speed reverse.The wheel drives will free wheel in eighth speed forward and sixth speed reverse. When the pistons in the all wheel drive motors are retracted away from the cam ring, the wheel drives are freewheeling. This does not provide torque to the all wheel drive motors.The all wheel drive system is composed of five main components:
All wheel drive piston pump (15)
All wheel drive gear pump (6)
All wheel drive control valve (2)
Flushing and cooling control valve (11)
Wheel drive (3) and wheel drive (10) The all wheel drive system is a hydrostatic drive system that is a closed loop circuit.Even though this is a closed loop circuit, a certain amount of oil is removed from this circuit. The oil is removed through the case drains. This is the oil that passes through the sequence valves. The oil passes through the sequence valves for cooling and for filtration. All wheel drive gear pump (15) continuously supplies makeup oil to the closed loop circuit. All of the makeup oil first enters the filter in the main hydraulic system. Then, the oil passes through the filter in the all wheel drive system.
Illustration 3 g00489498
(6) All wheel drive gear pump (7) Hydraulic and steering pump (8) Hydraulic oil tank (13) Filter (16) Operator's platformFilter (13) is located on the left side under the operator's compartment. Filter (13) is connected to the discharge line of the all wheel drive gear pump. Filter (13) provides filtration in the charge circuit in addition to hydraulic tank and filter (8) . Filter (13) is protected by a bypass valve that is set at 172 kPa (25 psi) .The filter element is located in filter (13) . A clogged filter will cause an increase in the hydraulic oil pressure. If the hydraulic oil pressure increases to 172 kPa (25 psi), the bypass valve will open. This allows the hydraulic