Ultraflex ND1-MM, Installation Manual

Page: 8 / 40

Installation manual
ULTRAFLEX
page 8
of 39
- ZTF SYSTEM
1.2 Operating principle
The hydraulic valve and corresponding cylinder of the ZTF Tiller System opens and closes when the pilot pushes
or pulls the tiller handle. When the pilot steers straight (keeping the steering route), the hydraulic valve is closed
thus removing the steering load from propeller torque on the tiller handle.
WARNING
The operator MUST maintain a firm grip on the tiller handle under ALL operating conditions; either actively
changing route or when maintaining a fixed route (with valve closed) as sea conditions, floating debris, or other
factors could suddenly change the steering route despite pilot's will.
The ZTF Tiller has a By-Pass Knob underneath the primary as-
sembly that can be used to engage or disengage the hydraulic
valve. Turning the knob clockwise completely will activate the
ZTF valve - locking out the propeller torque while not actively
changing steering route. Turning the knob counter-clockwise
will disengage the ZTF Tiller valve which will allow the propeller
torque to reach the tiller handle - even when not actively making
a steering route change.
WARNING
It is essential that the pilot confirms the functionality and status
of the ZTF Tiller System before using it.
To determine whether the system works properly, first check if
the By-Pass Knob is firmly closed by turning the By-pass Knob
clockwise. Then firmly push on the back of the engine to simu-
late a steering change (without pushing on the tiller handle simultaneously). If the engine does not turn in either
direction, the ZTF is engaged.
If the engine moves, tighten the By-Pass Knob in the clockwise direction and check again to see if the engine
moves. If it keeps moving, do not use the boat and contact our technical service for support.
Internal valve
open
Internal valve
open Internal valve
closed
Propeller torque
No effort
=
Zero torque feedback
Propeller torque
Propeller torque
ZERO TORQUE
FEEDBACK OFF
ZERO
TORQUE
FEEDBACK
ON