TM 9-2990-206-34&P
CHAPTER 4
TEST AND PRESERVATION
4-1. TEST.
Since turbosupercharger performance de-
pends on engine performance, the turbo-
supercharger cannot be tested unless it
is installed on an engine. Therefore,
testing a turbosupercharger not mounted
on an engine will consist only of check-
ing the turbine wheel for free rotation
and making certain that turbine wheel
radial clearance and end play does not
exceed dimensions given on page 2-4.
If the turbosupercharger passes these
tests, it will perform satisfactorily
when installed on an engine.
CAUTION
Turbosuperchargers must be
lubricated before installation
on an engine. Fill the center
housing through the oil inlet
port with engine oil (OE/HDO 30)
before installing the oil inlet
hose.
a. Short Term Storage.
(1) Fill
turbosupercharger center
housing with Preservative General Purpose
Lubrication Oil (VV-L-8OO). Apply a
light coat of the same oil to the exter-
ior surface. Drain excess oil.
(2) Wrap turbosupercharger with
Waterproof, Greaseproof Barrier Mater-
ial (MIL-B-121, Type II, Grade A, Class
2).
(3) Wrap turbosupercharger in
Wrapping and Cushioning Paperboard (Fed-
eral Specification PPP-P-291, Style I,
Type III).
(4) Tape securely with Paper Pack-
ing/Masking Tape (Federal Specification
PPP-T-42).
(5) Place package in a carton made
from Fiberboard Shipping Box Material
(Federal Specification PPP-B-636, Style
RSC, Type CF, Grade 125, Class DOM).
(6) Tape carton securely with
Waterproof Packaging Tape (Federal
Specification PPP-T-60).
b. Long Term Storage.
(1) Preserve and package turbo-
supercharger as outlined above.
(2) Place carton in Interior Pack-
aging Sleeve and Tubing Bag (Federal
Specification MIL-B-117, Style I, Type
I, Class E). Seal bag using standard
heat sealing equipment.
(3) Place sealed bag in a carton
made from Fiberboard Shipping Box Mater-
ial (Federal Specification PPP-B-636,
Style RSC, Type CF, Grade 125, weather
Resistant).
(4) Tape carton securely with
Waterproof Packaging Tape (Federal
Specification PPP-T-60).
4-1/
4-2
BLANK
4-2. PRESERVATION.