HYDRAULIC DIRECTIONAL CONTROL VALVE AND PRESSURE GUAGE
This task covers:
Trailer parked on level ground and
General Safety Instructions:
Tool set, general mechanics,
Gooseneck must be securely supported during
procedure or attached to trailer.
Gooseneck must be securely supported during this procedure and resting
on a firm foundation. Severe injury or death to personnel may occur if
gooseneck is unstable or tips.
High pressure hydraulics [oil under 2450 psi (16,893 kPa)] used to operate
this equipment can pierce body tissue and cause severe injury to personnel.
Never disconnect any hydraulic line or fitting without first dropping
pressure to zero.
Wear safety goggles when performing leakage tests on valves. Failure to
do so may result in serious eye injury due to high pressure oil.
Release all pressure from hydraulic lines.
Tag and disconnect five hydraulic lines (1) from rear and side of directional control valve
(3) inlet and outlet ports and cap or tape closed openings in ports and lines.
Cap or plug all ports and hose ends to prevent contamination of hydraulic
oil. Failure to do so may result in damage to equipment.
Tag and disconnect hydraulic line (5) from pressure gauge (4).
Loosen and remove three mounting bolts (2), washers and nuts securing hydraulic
directional control valve (3) to gooseneck and remove control valve and pressure guage.
Loosen and separate pressure guage (4) from directional control valve (3).