120M, 12M, 140, 140M, 150, 14M, 160M, 160 and 16M Motor Graders Secondary Steering System Location of Hydraulic Components Caterpillar

Illustration 1	g01403836
(1) Secondary steering pilot valve (2) Secondary steering motor (3) Hydraulic oil filter (4) Hydraulic tank (5) Control manifold (6) Pressure sensor (7) Check valve (8) Secondary steering pump (9) Check valve (10) Relief valve

Secondary Steering Pilot Valve

Illustration 2	g01374004
(1) Secondary steering pilot valve

Secondary steering pilot valve (1) is located in front of the cab.

Secondary Steering Pump and Motor

Illustration 3	g01374000
(2) Secondary steering motor (8) Secondary steering pump

Note: Use the above frame assembly for reference only.

Secondary steering motor (2) and secondary steering pump (8) are located in the front of the rear frame near the articulated hitch.

Hydraulic Tank and Filter

Illustration 4	g01374002
(3) Hydraulic filter (4) Hydraulic tank

Hydraulic tank (4) is located in the rear of the engine compartment on the left hand side. Hydraulic oil filter (3) is located next to hydraulic tank (4).

Control Manifold

Illustration 5	g01374003
(5) Control manifold (6) Pressure sensor (7) Check valve (9) Check valve (10) Relief valve

Control manifold (5) is located at the rear of the engine compartment on the left side.

Relief Valve

Relief valve (10) is located next to control manifold (5) that is located at the rear of the engine compartment. Relief valve (10) is located between the following hydraulic lines:

• Secondary steering pump to the control manifold

• Control manifold to the hydraulic filter

Check Valves

Check valve (9) is located in the line that runs from the implement/steering pump to control manifold (5).

Check valve (7) is located in the line that runs from the secondary steering pump to control manifold (5).