Bennett Marine XPT1218EIC, XPT1824EIC, XPT1218ATP, XPT1520EIC, XPT1520ATP Installation Instruction & Reference Manual
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DAHPU
Installation Instruction & Reference Guide
IMPORTANT SAFETY INSTRUCTIONS:
Read instructions completely before beginning installation.
Test the system before putting the boat in the water. Keep this manual on your boat.
550 Jim Moran Boulevard, Deerfield Beach, Florida 33442, USA / Phone: +1(954)427-1400 / Fax: +1(954)480-2897
XTP4-1 r111717
Congratulations, you are the owner of Bennett’s Premier XPT System —
the most prestigious trimming system in the world. Bennett Marine is recognized
worldwide for durability, strength, and unparalleled customer satisfaction.
How to Use Your Premier XPT Trim Tab System
Getting and Staying Trimmed
Your vessel will “break over” or plane at a particular speed. This speed is determined by weight distribution,
water conditions, etc. Your XPT trim tabs enable you to plane at lower speeds. By depressing the helm
control in the “Bow Down” position, your trim tabs move down. This will raise your stern and
lower your bow, getting you up on plane faster and increasing your speed.
Your Vessel’s Optimum Attitude
Determine your optimum attitude by conducting this test: Get out and
run at full speed in calm water. Notice the bow in relation to the
horizon. This should be your best running attitude. You can use
your trim tabs to recreate this “optimum attitude,” correcting
for changes in weight distribution, speed and water conditions.
Getting Used to the “Feel” of Your Tabs
When learning to use the XPT, begin by pressing the helm control in half-second bursts, allowing time between corrections for gradual trimming.
Do not over-trim. An over-trimmed vessel will “plow” or “bow-steer.” If you over-trim, simply press “BOW UP” and the bow will rise.
Trimming From a Bridge or Tower
When steering from a bridge or tower, a good trimming method is to watch the bow spray, stern wake, or the rooster tail. An untrimmed vessel will
produce spray farther aft of the bow and it will produce a larger wake. When trimmed, the bow spray is farther forward, the wake is reduced, and
the rooster tail is smaller and farther behind the boat. You’ll also notice that the engine RPM may increase when the boat is properly trimmed.
Running in Rough Water
When running in a chop, press “BOW DOWN”. This will bring the “V” of the hull in contact with the waves rather than having the waves pound the
atter portion of the hull and your passengers. In a following sea or when running an inlet, the trim tabs should be fully retracted for maximum rudder
response.
Correcting for a “Listing” Condition
The XPT trim tabs may be operated individually so that you can correct for a “listing” condition. Your control is designed so that you can use it
“intuitively.” Do not think about what the trim tabs are doing, just concentrate on your bow. If the port bow is high, push the port side “Bow Down”
direction. If the starboard bow is high, push the starboard side “Bow Down” direction until the “listing” condition is corrected.
Safety Precautions
• Do not over-trim, particularly at high speeds as the bow may dig in and wave action may cause the vessel to veer.
• While underway, do not move one trim tab signicantly farther down than the other as undesirable listing could occur.
• For best maneuverability, trim tabs should be fully retracted in a following sea, or when running an inlet.
• Improper use of trim tabs can cause an unexpected attitude change of vessel, which could lead to an unsafe condition.
The XPT System will have a signicant eect on the operation and versatility of the vessel. The best learning method is to spend time getting
familiar with your vessel’s reaction to trim tabs. Always operate your vessel with safety rst in mind.
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P-XPT-Z
Installation Instructions for Dual Acting XPT System
READ THIS FIRST BEFORE BEGINNING INSTALLATION
IMPORTANT FOR ACTUATOR INSTALLATION ON ALL BOATS
Actuators must be installed perpendicular to the trim tabs and parallel to each other. Stainless steel is not exible.
Measurements have to be precise.
BE CAREFUL NOT TO ROTATE THE ACTUATOR SHAFT ROTATING THE SHAFT WILL DAMAGE THE INTERNAL SENSOR.
IMPORTANT: FOR BOATS KEPT IN SEAWATER
THIS SYSTEM MUST BE PROTECTED FROM ELECTROLYSIS AND GALVANIC CORROSION —
THIS DAMAGE IS NOT COVERED UNDER WARRANTY
To provide protection from electrolytic corrosion a zinc anode must be applied to each tab. In the case of tabs installed on
the boat as original equipment by the builder, a bonding system may be utilized for your particular model. The XPT system
top portion of the actuator and the actuator shaft are electrically isolated from each other. Therefore the trim plane and the
upper part of the actuator must be individually protected or integrated into a bonding system.
NOTE: NOT INTENDED FOR RACING BOATS
FOR SINGLE ACTUATOR SYSTEMS (1 ACTUATOR PER SIDE) OR DUAL ACTUATOR SYSTEMS (2 ACTUATORS PER SIDE)
The actuator with the red sensor wire installs on the port side of the boat, and the actuator with the green sensor wire on the starboard
side of the boat. This also applies to dual actuator systems with two actuators per tab - one with sensor and one without.
Upper Mount Area
Support Tab from Below
Figure 1
Step 1: Positioning Tabs
Position the backing plate against the transom and, while supporting the trim plane from below, check to see that
the upper mounts of the hydraulic actuators do not center on an inside obstruction. If they do, reposition tabs slightly
outboard. The further outboard the tabs are mounted, the greater the lateral (side-to-side) control. Position tabs 3"-4"
(8-10 cm) from the chine and run towards the centerline of the boat. (See Figure 1)
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Step 2: Mark and Drill Holes
Continuing to support the tab, use the backing plate as a template
to mark all the hole locations. If the transom is curved, a shim must
be made of a suitable material to provide a at mounting surface.
Drill the holes on the trim plane mounting plate. All the holes
should be drilled at the same time. Drill the marked 11/32" (9mm)
mounting holes for each actuator. Drill the 3/4" (19mm) hole in the
transom for the sensor wire. Drill the 1/2" (12mm) holes for the pipe
nipples. And drill the appropriately sized holes for the mounting
plate based on the stainless steel fasteners chosen for install.
3/4" sensor wire hole
1/2" pipe nipple holes
11/32" acuator
mounting holes
1/4" trim plane
mounting holes
Apply sealant on the back of the backing plate and put plate on the transom.
Figure 2
Dip the selected stainless steel fasteners screws in marine epoxy before running in. Snug screws down to secure trim tab to transom.
IMPORTANT INSTALLATION NOTICE:
MAKE SURE ACTUATOR UPPER MOUNTS
FACE THE CORRECT WAY
The upper mount is able to pivot
through 180 degrees but there is
only one correct way to install it. The
pointed end of the upper mount must
face up as shown here.
Step 3: Mounting the
Actuators to the Transom
Carefully remove hex plugs
from the uid holes in the
actuator upper mounts. The
actuators contain a large
amount of automatic
transmission uid.
Apply Teon tape on male
Figure 3
Pipe nipples
thread in here
with teon
tape
threads of pipe nipples and tighten into the actuator upper mounts.
(See Figure 3)
Before pushing the pipe nipples and sensor plugs through the holes in the transom, cover the ends with masking tape to
prevent damage or debris from entering the system.
Carefully insert sensor wire through center hole. Pull all slack sensor wire into the boat. Apply waterproof sealant on surface of the upper
hinge mount, around pipe nipples and screw holes. Apply sealant to the backing plate where the actuator upper mount will attach.
Insert pipe nipples through transom and secure actuator upper mounts to transom with 5/16" (8mm) fasteners. Actuators should be
through-bolted to transom. Do not tighten bolts.
Step 4: Attach Actuator
Continue supporting the trim tab assembly from below in the full retracted position.
Attach actuator to the center hole of the “X” bracket on the trim plane using
5/16 -18 hex head screw and nylon stop nut. (See Figure 4)
Step 5: Tighten the Bolts
Tighten the three upper mount bolts run through the
transom in Step 3.
4
Figure 4
Step 6: Adjust Negative Angle
Use a straightedge and adjust the negative angle to your specication.
(See Figure 5)
Figure 5
Note for Dual Actuator Systems
For each side of the boat, only one actuator per tab will have a
sensor — one for the port side and one for the starboard side.
It does not matter which of the dual actuators has the sensor
Figure 6
(inboard or outboard). (See Figure 6)
Step 7: Filling the Dual Acting Hydraulic Power Unit (DAHPU)
Remove the Lexan cover from the DAHPU. Then remove the plug from the ller stack located at the front left corner of the reservoir.
Fill uid to reservoir if necessary using any type automatic transmission uid (ATF).
Step 8: Mounting the Dual Acting Hydraulic Power Unit (DAHPU)
Install Dual Acting Hydraulic Power Unit (DAHPU) in a convenient, dry location. Important: The DAHPU must be mounted in a dry
enough location to avoid drenching. Allow space above the DAHPU so that it may slide into its mounting bracket — about
3" (8 cm). This will also be enough space to remove Lexan cover once installed. Use the mounting bracket as a template, being careful
not to ex or bend it. The upper holes on the DAHPU mounting bracket should be 4 ⁄" (11.75 cm) apart. Drill 5/32" (4mm) pilot holes for
the mounting bracket. Put the four #10 x 1" screws into place but do not fully tighten. Run ground wire and wire harness down the back of
the DAHPU while sliding it into bracket. Now tighten screws on mounting bracket.
Step 9: Attaching Fittings
Inside the transom, remove the protective tape from the pipe nipples. Check that the pipe nipples are clean and clear. Then apply Teon
tape on male threads of pipe nipples and tighten the 90° brass elbows to pipe nipples.
Step 10: Running Hydraulic Tubing
Single Actuator System: Run hydraulic tubing between the actuators and cut to length. Secure tubing as needed. (See next page, Fig-
ure 8 for Single Actuator Systems.) Dual Actuator Systems: Run tubing from the DAHPUs to the desired Brass Line-T location as shown.
Secure as required. (See Figure 9 for Dual Actuator Systems.) Use tube bending clips at desired 90° bends in tubing to prevent kinking.
Step 11: Connecting Tubing to Actuators and DAHPUs
(See Figure 7) Insert tubing through the nut with ferrule and into the 90° elbow.
Push tubing to bottom of tting while tightening.
Tighten nut one full turn past nger tight - NO MORE.
Push until the tubing bottoms in the tting. While continuing to bottom the tubing in
the tting, tighten nut “nger tight,” then one full turn … NO MORE. Do the same to
connect the tubing to the Brass Line-Ts, and then from the Brass Line-Ts to the DAHPUs.
Step 12: Installing Electronic Indicator Control
Wire control and electrical system per diagram and instructions in the next section for
a XPT System with an EIC5000.
Figure 7
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