TB-9-1000-234-13
EXERCISING OF RECOIL MECHANISMS AND EQUILIBRATORS
TECHNICAL BULLETIN
SEPTEMBER 2010
TB-9-1000-234-13 - Page 27 of 52
TB 9-1000-234-13
2-11/(2-12 blank)
2.5
Exercising Recoil Mechanisms and Equilibrators Under Extreme Climatic Conditions.
a.
The extreme temperatures of the arctics and tropics will affect the rate of corrosive action.
b.
The heat of the tropics will lower the viscosity of the hydraulic fluid, thereby causing the film of
fluid between the packings and sliding surfaces to dry out more quickly. Consequently, more
frequent exercising will be required to maintain the necessary film of fluid. An increase of 18
˚
F
approximately doubles the rate of corrosion due to chemical reaction.
c.
The freezing temperatures of the artics will also affect the efficiency of the fluid seal and
packings.
d.
It is impractical to prescribe the increased frequency at which recoil mechanisms should be
exercised in various climates. On hydropneumatic systems under extreme climatic conditions,
special inspections must be made of the surfaces of the recoil piston rod and cylinder on
which the stuffing and piston packings rest when in battery position. This inspection should be
made while the recoil mechanism is being exercised, in accordance with instructions in
paragraph 1.3c. The frequency of exercising should be increased in accordance with the
findings of the above inspections.
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