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CHAPTER 2 INSTALLATION AND OPERATING INSTRUCTIONS | Up
TM-5-6115-545-12 Power Unit Utility Pack Gas Turbine Engine Driven (Air Research Model PPU85-5) Non-Winterized and (Air Research Model PPU85-4) Winterized Manual | Next
Installation and Setting-up Instructions |
Table 2-1. Freezing Points, Composition, and Specific Gravities of Military Antifreeze Materials.
Lowest
expected
ambient
temperature
oF
+20
+10
0
-10
-20
-30
-40
-50
-60
-75
Pints of
inhibited
glycol per
gallons of
coolant
1½
2
2¾
3¼
3½
4
4¼
Arctic
antifreeze
preferred
Compound, antifreeze
Arctic2
Issued full strength
and ready mixed for
0o to -65oF temperatures
for both initial
installation and
replenishment of
losses.
DO NOT DILUTE
WITH WATER OR
ANY OTHER SUBSTANCE
Ethylene glycol
coolant solution
specific gravity
68oF3
1.022
1.036
1.047
1.055
1.062
1.067
1.073
1Maximum protection is obtained at 60 percent by volume (4.8 pints of ethylene glycol per gallon of solution.)
2Military Specification MI L-A-11755 Arctic type, nonvolatile antifreeze compound is intended for use in the cooling system of liquid-cooled
internal combustion engines. It is used for protection against freezing primarily in Arctic regions where the ambient temperature remains
for extended periods close to -40oF or drops below, to as low as -75°F.
3Use an accurate hydrometer. To test hydrometer, use 1 part ethylene glycol antifreeze to 2 parts water. This should produce a hydrometer
reading of 0oF. Fasten a tag near the radiator tiler cap indicating the type antifreeze,
WARNING
Do not smoke or use an open flame in the vi.
cinity when servicing batteries. Batteries
generate hydrogen, a highly explosive gas.
Electrolyte contains sulfuric acid and can
cause severe burns. Handle it with care. If
the solution comes in contact with the body,
eyes or clothing, rinse immediately with
clean water. Avoid spilling electrolyte on
painted surfaces.
Slave receptacle is to be used
when extra cranking power is
r e q u i r e d f o r s t a r t i n g u n i t .
The electrolyte level must be rechecked approximately 30
minutes after initial filling as the plates and separators will ab-
sorb the solution, thus, resulting in a low level. If the battery is
not used within 12 hours after initial filling,it should be put on
a charger and brought up to the correct specific gravity. Test
batteries as described in paragraph 8-82b. for the ambient tem-
perature in effect.
(4) Check crankcase oil level (para3-3c.) and add oil as
necessary (para 3-4c. ) in accordance with the lubrication order
(fig. 3-l). Depreservation requires that the crankcase be drained
and refilled (para 3-46).
(4a) Class 1 sets only. (MEP105A). Check hydraulic oil level
and add oil as necessary in accordance with the lubrication order
(fig. 3-1).
O t h e r m e t h o d s a r e n o t a u t h o r-
(5) Perform the before operation preventive maintenance
i z e d ,
a s a r c i n g a t b a t t e r i e s
services specified in table 3-1.
c o u l d o c c u r.
2-4. Installation of Separately Packed Components.
(3) Batteries are shipped in a dry state. Battery electrolyte
No separately packed components are shipped with generator
must be requisitioned separately. To activate the battery remove
sets.
cell caps and fill battery cells with electrolyte. Make sure vent
holes in cell caps are open, and replace caps.
2-2
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