STEERING CONTROL MANIFOLD (CONT)
Suspension isolation valves at four corners of platform closed, handles facing outward (para. 2-6)
Hydraulic tank drained below system return line (para. 4-18)
Bottom cover of hydraulic control module removed and jumper wires to pressure switches removed (para. 4-33)
General Safety Instructions
Hydraulic fluid may be hot if system has been in operation. Allow time for system
to cool before performing maintenance or injury to personnel may result.
Residual pressure may remain in hydraulic lines. Open fittings slowly or injury to
personnel may result.
Hydraulic fluid may be absorbed through the skin. Wear long sleeves, gloves, and
goggles or face shield. If hydraulic fluid gets into the eyes, flush them immediately
with water and seek medical attention. If hydraulic fluid gets on skin, thoroughly
wash with soap and water. Wash bands thoroughly prior to eating or smoking.
When performing maintenance on hydraulic tubes and fittings, it is important to
tag both ends of a tube or hose and tag all associated fittings with item numbers
shown on the illustration. This method of tagging will ease installation.
Using a drain pan, tag and disconnect two hydraulic tubes (1 and 2) from two tube to boss tees (3) on steering
manifold (4) on hydraulic control module (5). Install caps/plugs into openings.
Tag and disconnect two hydraulic tubes (6 and 7) from two tube tees (8) on steering manifold (4).
caps/plugs into openings.
Tag and disconnect hydraulic tube (9) from straight pipe-to-tube adapter (10) on steering control manifold (4) and
4-way directional control valve bank (11). Install caps/plugs into openings.
4-378 Change 1