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TM 9-2320-356-BD
Procedural Steps:
Option 1: String or Rope Seal.
1. Remove damaged or worn rod gland seal.
2.
Saturate string or rope, depending upon size of packing, with wax or lip balm.
3.
Install substitute packing around cylinder rod and cut to make a snug fit.
4.
Tap the new packing with a blunt tool to form a tight seal around the cylinder
rod.
5.
Record the BDAR action taken.
When the mission is completed, as soon as
practicable,
repair using standard maintenance procedures.
Option 2:
Pump Packing.
1.
Remove damaged or worn rod gland seal.
2.
Install pump packing around cylinder rod and cut to make a snug fit.
3.
Tap packing with a blunt tool to form a tight seal around the cylinder rod.
4.
Record the BDAR action taken.
When the mission is completed. as soon as
practicable, repair using standard maintenance procedures.” -
14-8. CONTROL VALVE BANK ASSEMBLY DAMAGED OR DEFECTIVE
General Information:
A directional control valve consists of a body with internal passages which are
connected and disconnected by a movable part.
In directional valves, the movable
part is a spool.
Spool valves are by far the most common type of directional valve
used in hydraulics.
A directional valve consists of a pump passage, tank passages, and two actuator
passages.
This valve is known as a 4-way valve because it has four distinct
passages within its body.
The function of a 4-way directional valve is to cause the reverse motion of a
cylinder or hydraulic motor.
To perform this function,
the spool directs flow from
the pump passage to one actuator passage when it is in one extreme position. At
the same time, the spool is positioned so that the other actuator passage is
exhausted to tank.
Repair can be accomplished only by replacement with a serviceable part.
14-7
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