12M Series 3, 140M Series 3, 160M Series 3, 140, 150 and and 160 Motor Graders Location of Components (Hydraulic System) Caterpillar


Location of Components (Hydraulic System)
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1.1. Implement Control Valves
2.1. Oil Filter (Pilot)
3.1. Shutoff Valve
4.1. Pilot Control Manifold
5.1. Hydraulic Tank
6.1. Piston Pump (Implement and Steering)
7.1. Oil Filter (Hydraulic Return)
8.1. Centershift Lock
9.1. Centershift Cylinder
10.1. Sideshift Cylinder
11.1. Blade Tip Cylinder
12.1. Blade Lift Cylinders
13.1. Articulation Cylinders
14.1. Wheel Lean Cylinder
15.1. Circle Drive Motor
16.1. Swivel
17.1. Joystick Controls
18.1. Implement Electronic Control Module (ECM)
19.1. Blade Cushion Accumulators (If Equipped)

Implement Control Valves



Illustration 1g03506721
Control valves (1) are located at the front of the machine.


Illustration 2g03506756
Control valves (2) are located on the frame in front of the cab.

There are eight standard implement control valves on each machine. There is a maximum of 14 implement control valves that can be installed on each machine. The implement control valves are mounted in two different locations. Valve bank (1) is mounted on the frame near the front of the machine. Valve bank (2) is mounted on the frame in front of the cab. The implement control valves direct oil to the corresponding implements.

Oil Filter (Pilot)



Illustration 3g03506781

The implement pilot oil filter is located at the rear of the machine. The implement pilot oil filter removes debris from the pilot oil for the implement solenoids.

Shutoff Valve



Illustration 4g03507027

The shutoff valve is mounted on the right-hand side of the frame in front of the cab. The shutoff valve contains the implement lockout solenoid valve.

Pilot Control Manifold



Illustration 5g03506796

The pilot control manifold is located at the service center near the rear of the machine. The control manifold directs pilot oil to the implement control valves.

Hydraulic Tank



Illustration 6g03506805

The hydraulic tank is located between the engine and the radiator.

Piston Pump (Implement and Steering)



Illustration 7g03506815

The implement and steering pump is located below the hydraulic tank. The implement and steering pump is a variable displacement axial piston pump.

Oil Filter (Hydraulic Return)



Illustration 8g03506823

The hydraulic filter is located in front of the hydraulic tank. The oil filter removes debris from the hydraulic system.

Centershift Lock



Illustration 9g03506832

The centershift lock is located on the center of the link bar. The centershift lock prevents the circle from moving to either side of the machine when the centershift lock is engaged.

Centershift Cylinder



Illustration 10g03507041

The centershift cylinder is mounted to the link bar and the circle.

Sideshift Cylinder



Illustration 11g03507365

The sideshift cylinder is located on the rear side of the blade.

Blade Tip Cylinder



Illustration 12g03507368

The blade tip cylinder is located on the rear side of the blade.

Blade Lift Cylinders



Illustration 13g03507399
View of left blade lift cylinder


Illustration 14g03507431
View of left blade right cylinder

The blade lift cylinders are mounted to each side of the blade.

Articulation Cylinders



Illustration 15g03507450


Illustration 16g03507467

The articulation cylinders are mounted to each side of the machine under the cab.

Wheel Lean Cylinder



Illustration 17g03507469

The wheel lean cylinder is mounted to the front axle on the right-hand side of the machine.

Circle Drive Motor



Illustration 18g03507470

The circle drive motor is located in the center of the circle.

Swivel



Illustration 19g03507477

The swivel is located in the center of the circle. The swivel allows for usage of the blade tip cylinder and the sideshift cylinder as the circle is rotated.

Joystick Controls



Illustration 20g03506995

The joystick controls are located inside the cab on both sides of the seat for the operator. The joystick controls send an electrical signal to the solenoids of the hydraulic system.

Implement Electronic Control Module (ECM)



Illustration 21g03507167

The implement ECM's are located inside the cab behind the seat for the operator.

Blade Cushion Accumulators (If Equipped)



Illustration 22g03506890

The blade cushion accumulators are mounted on the frame in front of the blade lift cylinders. The Accumulators cushion the head end of the cylinder from sudden rises in pressure.