TM 5-2330-325-14&P
Section IX. GOOSENECK HYDRAULIC SYSTEM MAINTENANCE
Paragraph
Page
Number
Paragraph Title
Number
General ......................................................................................................................... 4-88
Hydraulic Line Replacement ........................................................................................ 4-88
Hydraulic Pressure Relief Valve Replacement ............................................................ 4-90
Hydraulic Throttle Valve Replacement......................................................................... 4-92
Hydraulic Directional Control Valve and Pressure Gauge Replacement ................... 4-94
Setting Hydraulic Pressure ........................................................................................ 4-96
This section provides information for performing Unit level hydraulic maintenance repairs on the
M870A3 semitrailers.
This task covers:
a. Replacement
Initial Setup:
Equipment Conditions:
Materials/Parts:
Trailer parked on level ground and brakes engaged.
Tape, anti-seizing (item 21, Appendix F)
Tie, plastic (item 24, Appendix F)
Tools/Test Equipment:
Tool kit, mechanics general,
NSN 5180-00-177-7033
WARNING
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.
