MANUAL TILT ASSIST
90-828631R3 MARCH 1999 Page 5D-9
Slow Tilt Down Under High Thrust
To tilt the engine down under high thrust conditions [where the propeller thrust forces the
shock rod down, creating higher pressure below the memory piston (m)], the camshaft lever
(f) is rotated slightly downward. The internal shaft connected to the lever will open the down
circuit slow transfer valve (i) allowing oil under pressure into the cavity around the shaft. The
higher oil pressure will open the up circuit fast transfer valve (j) allowing oil from the bottom
of the cylinder to flow above the shock piston (n) while lowering the engine. Additional oil
will flow into the accumulator (c) as the internal pressure forces the accumulator check valve
(e) to open. Oil flowing into the accumulator moves the accumulator piston (d) and compres-
ses the gas.
a-Shock Rod
b-End Cap
c-Accumulator
d-Accumulator Piston
e-Accumulator Check Valve
f-Camshaft Lever
g-Manifold
h-Down Circuit Fast Transfer Valve
i-Down Circuit Slow Transfer Valve
j-Up Circuit Fast Transfer Valve
k-Surge Valve
l-Cylinder
m-Memory Piston
n-Shock Piston
o-Shock Return Valve
p-Impact Relief Valve
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