Suzuki DF 40 User Manual

8-19 POWER TRIM AND TILT
PRINCIPLES OF OPERATION
TRIM/TILT “UP” CIRCUIT
The electric motor is operating in a clockwise direction. Check valve A will open, allowing oil to flow from the
reservoir to the pump. Oil flow from the pump enters the spool valve, moving it to the left, opening the “down”
pressure main check valve and returning oil from the upper cylinder chamber (plus oil from the reservoir) to
the pump. Pressure built up by the pump will then open the “up” pressure main check valve and oil will enter
the lower cylinder chamber.
When trim motor stops, both the “DOWN” pressure main check valve and the “up” pressure main check valve
will close to retain tilt/trim position.
When full trim/tilt “up” position is attained, sustained operation of the “up” relay will have no effect, as pump oil
flow will be returned to the reservoir through the “up” relief valve.
Oil reservoir
Upper cylinder chamber
Tilt rod
Piston
PTT motor
Check valveA
Gear pump
Spool valve
“DOWN” pressure main check valve
“UP” relief valve
“UP” pressure main check valve
Lower
cylinder
chamber

Suzuki DF 40 Specifications

General

Brand	Suzuki
Model	DF 40
Category	Outboard Motor
Language	English