Bell OH-58A - Page 161

TM 55-1520-228-BD
HYDRAULIC
OPTION 2:
Substitute with High Pressure
Hose (damage to section of tubing with
bends).
PERSONNEL/TIME REQUIRED:
1 Soldier
30 Minutes
MATERIALS/TOOLS REQUIRED:
Hydraulic Hose Assembly Complete
with End Fittings
2 MS Unions
2 MS Fittings
Tube Cutter
Knife or File
PROCEDURAL STEPS:
1.
Cut and remove damaged section of
tubing, Figure 9-10. Tube ends must be
square.
2.
Clean ends of undamaged tubing with
knife or file.
3.
Install MS fittings as shown in
Figure 9-8.
4. Connect MS unions to both MS
fittings and complete the repair by
connecting a hydraulic hose assembly
from one union to the other, Figure
9-11.
If the damaged length of
tubing is long and more than one
hose assembly is required, hose
assemblies may be spliced together
with unions. No harm will be done
if the replacement hose is too long.
5.
Clamp at convenient intervals (not
exceeding 2 feet) to rigid supports to
secure the line.
9-8. HYDRAULIC HOSE DAMAGE.
GENERAL INFORMATION: The hydraulic
hoses on the OH-58 are braided wire
covered rubber hose. Repair of damage
or wear to the wire braids is deferrable
for one more flight, provided the rubber
inner hose is not leaking under
pressure. Inspect after every flight.
If the inner rubber hose is leaking and
a replacement assembly is not available,
manufacture a new hose assembly. If an
elbow fitting is not available, make a
new hose with a large gentle loop so the
hose will not kink. MS detachable fit-
tings from a damaged hose may be reused
in the manufacture of a new assembly as
long as the threads and the seat are not
damaged. Swaged fittings cannot be
reused.
OPTION 1:
Install New Hose Assembly-BDAR
Kit.
LIMITATIONS: None.
PERSONNEL/TIME REQUIRED:
1 Soldier
20 Minutes
MATERIALS/TOOLS REQUIRED:
Hydrualic Hose Assembly
PROCEDURAL STEPS:
1.
Remove damaged hose assembly.
2. Install new hose assembly (BDAR kit).
It may be necessary to splice two or
more hose assemblies together using MS
unions to replace the damaged hose
assembly.
No harm will be done if the
replacement hose is too long.
6.
Record BDAR action taken. When
mission is complete, as soon as
practical, repair the equipment/system
using standard maintenance procedures.
9-9