7.4.5 Troll Throttle Limit Adjustment (Function Code L4)
• The Value programmed for Function Code L4 is a percentage of the throttle range. The
Throttle Range is the difference between Throttle Maximum (E3) and Throttle Minimum (E2).
• The maximum percentage of the Throttle Range which the Value can be set to is 20%.
• The adjustment of this Function Code is a matter of personal preference. There is not set
procedure which determines when increased throttle should be used and what percentage of
the range it should be set to.
7.4.6 Troll Pulse Duration (Function Code L5) & Troll Pulse Percentage (Function Code L6)
Adjustments
Whenever Troll is enabled (red LED blinking rapidly) and the Control Head lever is moved from
Neutral/Idle to the Ahead or Astern detent, the current to the Proportional Solenoid is delivered at a
value which causes a higher clutch pressure for a set period of time. The period of time where the
higher pressure is commanded is adjustable with this Function.
The default Value of 00.6 seconds has been found to be adequate with most applications. However, if
the shaft takes unreasonably long to begin rotating, or if an excessive surge is felt when commanding
Ahead with Troll selected, the amount of time that the higher pressure is commanded may be
adjusted with the Troll Pulse Duration Function.
The Troll Pulse Percentage’s Value automatically changes to the same Value selected with Troll
Maximum (Function Code L3). As with Troll Pulse Duration, experience has showed us that
commanding this higher clutch pressure is adequate in most applications. In the event that the shaft
takes unreasonably long to begin to rotate, or an excessive surge is produced every time Ahead is
commanded with Troll, the Value can be increased or decreased.
When the need to adjust these Values arises, it is recommended that small adjustments to each of
these Functions are made instead of one large adjustment to one or the other. After each small
adjustment, test the vessel’s response prior to making further adjustments.
7.4.7 Integrated ZF-Hurth Solenoid Trolling
7.4.7.1 Enabling ZF-Hurth Troll
A Ensure Function Code C5 (Shift Solenoid Type) value is set to 01 or 02 (refer to Section
Section 5.7.1.3.1: Function Code C5 – Shift Solenoid Type).
B Place the Control System into Troll Mode by pressing and holding the transfer button for
approximately 2 seconds, until the red LED begins blinking rapidly.
C Move the Control Head lever into the Ahead Detent.
7.4.7.2 Troll Maximum Current Adjustment
Ensure that the current to the Ahead and Astern Solenoids do not exceed the current rating of the
Solenoid.
A This is accomplished by connecting an amp meter in series with the Ahead and then the
Astern solenoid signal.
B Place the Control Head lever into the Ahead and the Astern detent without Troll selected
(Control Head red LED lit solid).
C Adjust Function Code C6 for Ahead and C7 for Astern as described in Sections Section
5.7.1.2.2: Function Code C6 – Clutch Ahead Travel and Section 5.7.1.2.3: Function Code C7
– Clutch Astern Travel.
CAUTION: Consult the Trolling Valve’s Installation Manual prior to programming any increased throttle above
Idle, while slipping the Clutch. Failure to adhere to the Transmission manufactures directives may permanently
damage the clutch pack and void the warranty.
NOTE: It is strongly recommended that the Field Service Test Unit (P/N 1400) is utilized when adjusting the ZF-
Hurth Solenoid.
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