All components of PS series injection type
carburetor are self-contained In one assembly. Any
difficulty that cannot be corrected by adjusting idle
mixture or speed or unplugging vapor bleed requires
replacement of carburetor.
e. Preservation. When carburetors are removed
for placement of storage or for rework, they should be
preserved using the following procedures:
chambers of the regulator unit, and
from contacting the air metering
portion of the carburetor, including
the main venturi, impact tubes, and
automatic mixture control. Damage
to carburetor may otherwise result.
Remove drain plugs from bottom of fuel
chamber on float-type carburetors and drain out all fuel.
With drain plugs reinstalled, fill float chamber with
lubricating oil, MIL-L-6081, Grade 1010.
Drain fuel and air chambers and fuel
control unit by removing drain plugs on PD and PR
series Injection-type carburetors Replace plugs to air
chambers and inject lubricating oil, MIL-L-6081, Grade
1010, (under 10 to 15 psi regulated pressure) until fuel
outlet on fuel control unit shows oil seepage. Remove
drain plugs and allow excess oil to drain out. Reinstall
Remove drain plugs from main fuel
chamber on PS series Injection-type carburetors and
force lubricating oil, MIL-L-6081, Grade 1010, into fuel
inlet at 8 to 10 psi until oil seeps from fuel discharge
nozzle. Remove drain plug on bottom of main regulator
assembly and allow all excess oil to drain. Reinstall
Installation. Install carburetors using the
Remove all burrs and gasket particles
from carburetor and engine mating surfaces
Cover fuel lines, subject to contamination
Place carburetor on engine, close and
secure throttle valves in closed position with lockwire.
Connect all lines.
Tighten mounting bolts in accordance with
limits specified in maintenance manual.
Tighten and lockwire all other nuts and
Check throttle and mixture control lever
for freedom of movement; connect linkage.
Remove lockwire from throttle valves.
Ensure that vapor vent lines are free from
7-10. Removal and Installation of Reciprocating
Engines. Preparation for removal, preparation for
installation, and installation of reciprocating engines are
explained In the following paragraphs.
a. Preparation for Removal. The following
preparations should be made prior to removing engines:
manual, aircraft log book, and, when applicable, DA
Provide proper special tools, hoist, and
engine stand for engine as given in maintenance
manual. Provide ground support equipment and hand
Provide working area with drip pans, fire
extinguishers, and NO SMOKING signs. Provide oily
waste cans, Federal Specifications RR-C-114, for
storage of all rags used for cleaning engine components
and wiping up fuel and oil.
Ensure that aircraft is properly grounded
and choked and battery is disconnected Remove
Removal. Remove engine from the aircraft In
accordance with basic instructions given herein and in
the specific engine maintenance manual.
Preserve engine in accordance with
Disconnect all control rods and cables,
magneto conduits, fuel and oil lines, thermometer tubes,
tachometer shafts or wires, and like connections.