Bell OH-58A Technical Manual page 126

TM 55-1520-228-BD
POWER PLANT
MATERIALS/TOOLS REQUIRED:
. Flex Line Tubing (ID 0.25 in.,
Length 12 in. min)
. No. 4 Fittings
PROCEDURAL STEPS:
1. All connections and fittings
throughout the system incorporate the
same thread pattern and therefore a
variety of configurations may be
achieved. Should the system be inoper-
able, remove only the defective compo-
nent(s) and reconstruct the system.
Refer to Figure 6-3 to determine
possible alternatives.
2. Reuse existing o-rings when
possible.
If o-rings are severely
damaged, scavenge off removed component.
CAUTION
All fuel control lines must be
maintained. No lines may be
deleted or plugged.
3. Insure the lines between the fuel
control and the governor are intact and
not leaking.
4. If any leakage is incurred due to
the above procedure and cannot be
corrected or if time constraints take
precedent, the system may be bypassed as
a last resort, refer to option 2.
OPTION 2: Bypass Entire System.
Erratic flight control.
LIMITATIONS:
NOTE
The pilot must be made aware that
any fuel demand he places on the
engine will be reacted upon imme-
diately leading to quick engine
response and erratic flight
control.
6-6
PERSONNEL/TIME REQUIRED:
. 1 Soldier
. 15 Minutes
MATERIALS/TOOLS REQUIRED:
. Flex Line Tubing (ID 0.25 in.,
Length 12 in. rein)
. No. 4 Fittings
1.
Refer to Figure 6-3(b) to establish
bypass configuration.
2. Disconnect clamp from flexible hose
and extend flexible hose to rigid hose.
3. Use fitting from either hose and
connect the two hoses.
4. Insure both o-rings are reusable and
no leakage exists.
damaged, scavenge from bypassed compo-
nents.
6-7.
OIL TANK PUNCTURED.
GENERAL INFORMATION: The engine will
seize in a matter of minutes if run
without oil. This procedure lists six
methods to fix a leaking oil tank,
depending on the size of the leak and
the materials available. If fuel cell
repair kit is available, utilize its
contents.
LIMITATIONS: None.
NOTE
Some repairs may come loose due
to heat and vibration.
Wood Plug (for Smooth Round
OPTION 1:
Holes).
PERSONNEL/TIME REQUIRED:
. 1 Soldier
. 30 Minutes
MATERIALS/TOOLS REQUIRED:
. Plug, Wooden
. Hose or Tubing
If either o-ring is