Wilson Trailer HYDRO-Trap User manual
HYDRO-Trap Operator’s Manual
This manual has been prepared to help you operate your HYDRO-Trap successfully and safely. Should you have
any questions, we ask that you contact a Wilson Trailer factory representative immediately for a clear explanation.
NOTE: Wilson Trailer constantly makes product improvement to its product line. Your trap may
vary slightly from the equipment described and/or pictures in this manual.
We thank you for expressing your confidence in us through the purchase of your new Wilson HYDRO-Trap.
We want you to know that it was designed to meet your specific needs and is built for long life and low cost
operation. With regular, proper maintenance and your common sense, we are confident that it will do so.
Additional manuals and decal kits are available without charge.
MODEL NO. SERIAL NO.
Wilson Trailer Company
Operators Manual for
HYDRO-Trap
HYDRO-Trap Operator’s Manual
This safety alert symbol is to raise your awareness to important messages in this manual. When
you see this symbol, be alert to the possibility of personal injury and carefully read the message
that follows.
GENERAL INFORMATION
General Description .....................................................1-1
SAFETY
Hydraulic Injection........................................................2-1
Decals and Emblems....................................................2-1
OPERATION
Power Requirements....................................................3-1
Lubrication Requirements ..........................................3-1
HYDRO-Trap Operations.............................................3-2
HYDRO-Trap Manual Operation ..............................3-2
HYDRO-Trap Wireless Operation.............................3-3
HYDRO-Trap Remote & Receiver Information .....3-4
Inspection - Step 1.........................................................3-5
Inspection - Step 2.........................................................3-8
Inspection - Step 3.........................................................3-10
TABLE OF CONTENTS by SECTION
GENERAL MAINTENANCE
General Maintenance..................................................4-1
Repair and Service Parts..............................................4-1
Hardware Install Guide ...............................................4-1
Hydraulic Fluid...............................................................4-2
Notes About Oil.............................................................4-2
Schematics.......................................................................4-3
Wiring Diagram .............................................................4-3
Troubleshooting............................................................4-4
Potential Issues...............................................................4-4
Resolution Procedures.................................................4-4
Cab Wiring Kit Installation..........................................4-15
CONSUMER INFORMATION
Warranty Coverage ......................................................5-1
Major Component Coverage ....................................5-1
Limitations and Disclaimers .......................................5-2
Product History ..............................................................5-3
Index..................................................................................5-4
HYDRO-Trap Operator’s Manual
The HYDRO-Trap utilizes hydraulic cylinders to open and
close the traps. The hydraulic pump is powered by the tractor
through the cab wiring kit with a master disconnect switch.
The hydraulic traps are activated with the control panel located
at the center of the trailer or by the optional remote. The
standard remote control system operates the HYDRO-Traps and
a Shurco 4500 Smart 3 Series power tarp. An accessory output
is available to operate lights by remote.
General Description
General Information 1-1
HYDRO-Trap Operator’s Manual
The following section contains the decals and emblems specific
for this HYDRO-Trap.
2-1 Safety
Decals and Emblems
SAFETY
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Hydraulic Injection
WARNING
When working on a Hydraulic System, always insure
hydraulic lines have been depressurized. Hydraulic injection
can cause loss of fingers and even loss of life in severe cases.
Hydraulic injection can seem like a bee sting. If you are ever
bitten by hydraulic injection go directly to the emergency
room for treatment.
HYDRO-Trap Operator’s Manual
OPERATION
Operation 3-1
Power Requirements
CAUTION
Make sure all power supply to trailer is disconnected
and the ground wire in the nose of the trailer and on
the receiver box is disconnected prior to any welding
on trailer. Failure to do so could result in damage to
receiver control box!
It is required that Cab Wiring w/Disconnect switch be installed in the Tractor to Power the Hydro-Trap (WTC
P/N APP04780YZ). This kit includes a Master Disconnect. It is recommended this be installed in the cab of
the tractor and turned to the ON position ONLY when the traps need to be operated. This kit includes a
120 amp resetable breaker required for the HYDRO-Trap option.
In order to operate, this system requires two power supplies:
1. The control system logic power is supplied a constant nominal 12v by the 7-way center pin (blue
wire) and grounded by the bottom (larger) ground pin (white wire). These connections must be kept
in good repair. Chassis ground is not adequate or reliable. The ground connection of the 7-way must
have a good connection to the tractor ground.
2. The pump motor power and ground are supplied via a heavy gauge high current Shurco 2 pin
connector at the front the trailer. Tractor wiring kits are available from Wilson Trailer and are the
only approved system for powering this unit. Note: Previously installed cab wiring kits for
powering Shurco power tarp or trap openers use the same connector but do not supply
adequate power to operate the unit when loaded.It is possible to retrofit these tractor systems.
(Contact WTC service for details.) The cab wiring kit must be installed per instructions (including the
Master Disconnect Switch and 120 amp slow-trip circuit breaker module). The installation should
use sufficient cable to comfortably reach components and support maintenance, but avoid coiling
up excess as any extra cable length reduces power available to the motor. Chassis ground is not
adequate or reliable, ensure that the ground cable is connected to a tractor battery cable. All high
power connections need to be kept in good repair. For maximum door opening force and
speed, the trap should be operated with the tractor running.
Lubrication Requirements
Only use Petro-Canada Hydrex MV Arctic 15 Hydraulic fluid or
any mineral based hydraulic oil between 10 cSt and 100 cSt at
your ambient outdoor operating temperature.
HYDRO-Trap Operator’s Manual
3-2 Operation
OPERATION
HYDRO-Trap Operation
WTC recommends the Cab Wiring w/Disconnect switch be installed in the tractor to power
the HYDRO-Trap (WTC P/N APP04780YZ). This kit includes a Master Disconnect. It is
recommended that this be installed in the cab of the tractor and turned to the ON position
ONLY when the traps need to be operational. It should be turned to the OFF position when
the traps are not required to be operational. This kit includes a 120 amp Breaker required
for the HYDRO-Trap option.
Disconnect power before servicing. Make sure all power supply to trailer is disconnected
and the ground wire in the nose of the trailer and on the receiver box is disconnected prior
to any welding on trailer. Failure to do so could result in damage to receiver control box.
IMPORTANT NOTICE
HYDRO-Trap Manual Operation
1. Turn Master Disconnect Switch in the tractor to the
“ON” position.
2. Make sure tractor is running and all connections to the
trailer are hooked up.
3. Verify that all personnel are clear of the power trap
and tarp (if equipped) before operating either.
4. Press and hold button for desired operation (Open or
Close).
5. Close trap door when finished unloading.
6. When finished operating the traps, turn Master
Disconnect Switch in the tractor to the “OFF”
position.
CAUTION
The hydraulic cylinders and trap doors/frames
may be damaged if trailer is transported with
the doors in the open position.
HYDRO-Trap Operator’s Manual
Operation 3-3
OPERATION
HYDRO-Trap Wireless Operation
NOTE
A Shur-Co Smart 3 electric tarp (if
equipped) can also be operated by a
Shur-Co Smart 3 remote control. (WTC
P/N APP04780AEH
1. Make sure tractor is running and all connections
to trailer are hooked up.
2. Turn Master Disconnect Switch in the tractor
to the “ON” position.
3. Verify that all personnel are clear of the power
trap and tarp (if equipped) before operating
either.
4. To turn the remote “ON”, press and hold power
button on remote for 3 seconds and release to
turn on remote. The red and green lights will
be on simultaneoulsy when pressing the power
button. The green light will double flicker after
releasing the power button.
5. Press and hold button for desired operation
(Open or Close). Hopper 1 is the front trap;
Hopper 2 is the rear trap.
6. To turn remote “OFF”, press and hold power
button on remote until the two LED’s (red and
green) turn off. Red and green lights alternate
flashing until they both turn off to indicate the
power is off. Remote will automatically turn off
after 15 minutes of inactivity.
7. When finished operating the traps, turn Master
Disconnect Switch in the tractor to the “OFF”
position.
8. Momentarily press the tarp open or close button
to operate the tarp in Shurco Smart 3 express
mode.
9. ACC momentary buttons will turn and hold
accessory functions on or off. Accessory will stay
in the last position after disconnecting power.
CAUTION
The hydraulic cylinders and trap doors/
frames may be damaged if trailer is
transported with the doors in the open
position.
Remote (APP-05225-B)
HYDRO-Trap Operator’s Manual
OPERATION
3-4 Operation
HYDRO-Trap Remote & Receiver Lights & Error Code Information
1. When turned on the green LED on remote will flash.
2. The red LED will blink (once/second) when the remote
battery gets low. The green light will still operate when
the power is low.
Remote (APP-05225-B)
Receiver (APP-05225-F)
RED (Error Code LED)
GREEN (Signal LED)
RED (Error Code LED)
GREEN (Signal LED)
3. When receiver has power and the remote control is
off, only the red LED on the receiver will blink (once
per cycle). When the remote is connected to receiver
the green LED on the receiver will blink. The red error
code will blink twice per cycle if remote has low voltage
(below 11 volts). The green light can still blink when
the power is low.
HYDRO-Trap Operator’s Manual
Operation 3-5
INSPECTION
HYDRO-Trap System Inspection
Perform all inspections in order: No power to trailer; Add 7-way power; Add dual conductor
power.
This inspection assumes the common installs having a Shur-Co 4500 power tarp with a Smart
3 control module, electrical connections are Grote bullets or Deutsch connectors, tractor
has 120 amp kit installed with 120 circuit breaker and disconnect switch, and a Kar-Tech
receiver and KTI hydraulic pump unit installed in the apex of the trailer. Older units may have
connections with crimped bullet connections covered with heat shrink. Several models may
have the receiver and hydraulic power unit mounted over the kingpin.
Inspection Step 1: No Power to Trailer
Tractor power supply and connection to trailer
Disconnect the tractor 7-way and dual conductor cables from the trailer to perform the initial inspection.
Test the 7-way cable voltage output between the center pin auxiliary/ABS power and the ground pin. The
ground pin is the largest of the seven and at the top of the connection.
Test the voltage output of the dual conductor cable. Confirm the 120 amp circuit breaker is installed and is
in the set position. Confirm the main power disconnect switch is on. Both the 120 amp circuit breaker and
disconnect switch must be connected to the positive terminal with the circuit breaker closer to the battery.
Inspect disconnect switch, circuit breaker, connections, plugs, and cables for corrosion.
Front of trailer; outside
Examine the 7-way and dual conductor connections at the front of the trailer for debris buildup, corrosion,
deflected or loose pins, or other damage. Clean corrosion or debris buildup from connectors. Examine the
tarp module for damage. Depress open and close button functions for feel of operation.
Front of trailer; inside above kingpin
Inspect the inner wall of the front, above the
kingpin. Examine the blue wire power and
white wire ground connections from the
main harness. Inspect the dual conductor
power connections.
Inspect the connections on the tarp module,
dual conductor power system, and control
wire connections. Check the 40 amp fuse
holder for signs of corrosion or debris
buildup and clear drain holes if plugged.
Examine dual conductor cables entering
sidewall of trailer.
REFER TO TROUBLESHOOTING SECTION IF PROBLEMS ARE IDENTIFIED.
HYDRO-Trap Operator’s Manual
3-6 Operation
Inspection Step 1: No Power to Trailer (Continued)
INSPECTION
Receiver
The receiver is located towards the middle of the trailer
between the hoppers. Examine power and tarp wires,
and connections from the side of trailer to the receiver.
The receiver has two cables existing the bottom and an
antenna at the top (2.6”). Examine receiver for damage,
missing antenna, and cable strain at the receiver bottom.
The driver side cable connects the receiver to the manual
button inputs in the rubrail. Examine the four connections.
An auxiliary input plug (yellow and red wire pair) should
have a cover if not in use.
Manual Button Switches
Depress the manual buttons and compare each for a similar
feel and sound. Examine where the input wires run through
the rubrail for damage or missing grommets/silicone.
Examine the receiver curb cable which runs to the hydraulic
pump unit. Eight wires run to the valve control solenoids,
two to main power, two to the tarp module if equipped,
and one to the motor starter relay.
HYDRO-Trap Operator’s Manual
Operation 3-7
INSPECTION
Inspection Step 1: No Power to Trailer (Continued)
Hydraulic Pump Unit
Overall
Examine fluid reservoir, pump manifold, and motor for damage or leaks. Examine bracket mount structure
for cracks or loose fasteners. The hydraulic pump unit is bolted to the bracket with two bolts through the
back of the unit. Ensure these bolts are tight (18 ft-lbs) and that a cushion is in place between the fluid
reservoir and the bracket. Ensure the motor starter relay cover is installed over the motor. This cover is
held in place by a large zip tie, which will need to be removed and replaced to examine issues related to the
motor starter relay. Newer models may have a releaseable and reuseable zip tie.
Dual Conductor
Power Cable Hoses
Motor
Manifold
Reservoir
APP-04780-YW
APP-05225-AF
APP-05225-T
Electrical
Inspect dual conductor cable from sidewall to under motor starter relay cover. The valve solenoids are
located on the hydraulic pump unit manifold between the reservoir and the motor. There are four total and
each will have a plug connection from the receiver. Examine four square solenoids for loose, damaged, or
unplugged connections. Torque nuts holding solenoids to 3 ft-lbs max. Inspect the pump control wire (the
purple wire) between the harness and the motor starter relay under the cover.
Hydraulics
Check hydraulic fluid level in reservoir by the level emblem. Clean debris from the breather cap and the
top of the reservoir. Check fluid level with breather cap dipstick and make sure o-ring under cap is intact.
Breather cap is installed finger tight.
Check tightness of plug at manifold. Examine hydraulic power unit for leaks. Check directional valve posts
and solenoids for damage or bent posts. Inspect PO check valves and relief valve for damage. Inspect 90°
fittings and hoses ends; two on top of manifold and two on the bottom.
Hoses and cylinders
Inspect four hydraulic hoses from the hydraulic pump unit. Four hose lines run to the sidewall and two to
each hopper. Hoses split at tees on the hopper into four lines which end at 90° fittings installed into the
hydraulic cylinders. Inspect hydraulic cylinders for leaks, damage, or debris accumulation at seals. Check
cylinder mounts, pins, and clevis ends for signs of excessive wear. Check the rear brackets for stability.
HYDRO-Trap Operator’s Manual
3-8 Operation
INSPECTION
Inspection Step 1: No Power to Trailer (Continued)
Remote Control
Check remote control for damage and button operation
feel with power off. Check for debris in the charging port.
Hold the red power button for a few seconds to turn on
the remote control. The green light should flash twice
per cycle. A red led flashing indicates a low battery. Hold
down each operation button and observe the green light
change to a single flash per second. Turn off the remote
by holding the red power button for four seconds. The
green and red lights will alternate flashing until the remote
is off.
The remote control will turn off after 15 minutes without
use.
Inspection Step 2: Add 7-Way Power
Auxilary Power to the Receiver
Ensure 7-way plug has power and connect it to trailer. Do
not connect dual conductor plug yet. Observe ABS light
operation at the trailer rear corner to verify ABS/auxiliary
power circuit is working.
Observe the receiver for lights. The receiver has a red error
code led in the upper right corner near the antenna, and a
green signal led in the lower right corner.
Confirm the remote control is turned off. Leader notes
for the LED’s can be here for the receiver and remote.
Observe the receiver for the red led flashing with one
blink per cycle. This is normal when the remote control is
turned off. If the red led flashes twice per cycle it indicates
power voltage less than 11 volts.
Receiver RF communication
Turn the remote control on. The receiver red led should
stop flashing and the green signal led should start flashing.
The manual buttons will work as intended without a
remote control connected to the receiver; however, some
troubleshooting steps may not be performed, and the
receiver will continue to show a red single flash error light.
Remote (APP-05225-B)
Receiver (APP-05225-F)
HYDRO-Trap Operator’s Manual
Operation 3-9
INSPECTION
7-way power and main ground to the HYDRO-Trap
system
Confirm the dual conductor power disconnect switch is
off and connect the dual conductor plug. This will allow
testing of the connections to the inputs and outputs with a
common ground but not operate the hydraulic pump unit
to operate.
Take a position near the hydraulic power unit to listen for
solenoid operation. Press each of the manual buttons on
the rubrail and listen for the clicking sounds of the direc-
tional control valves and the motor starter relay. Each
button should have a similar sound.
Press the buttons for all four trap functions on the remote
control. The same sounds should be present as well as the
remote’s green led increased flashing rate. The green light
on the remote will flash three times per second when an
operation button is pressed and communication with the
receiver is established.
Inspection Step 2: Add 7-Way Power (Continued)
Remote (APP-05225-B)
HYDRO-Trap Operator’s Manual
3-10 Operation
INSPECTION
Inspection Step 3: Add Dual Conductor Power
Connect the dual conductor power to the trailer. Turn the
disconnect switch to the on position. Turn off immediately
if the hydraulic pump unit motor starts running. Confirm
the receiver input and that the hydraulic power unit motor
is NOT running. Test the tarp operation with the tarp con-
trol module at the front of the trailer. If the tarp operates,
press the opposite function to stop and return the tarp to
its initial position. Operate the hydro trap manual buttons
and/or the remote control buttons and listen for the motor
to run and observe the respective trap function.
The motor starter relay is mounted to the motor with two
screws and has four terminal posts: #10-24 posts at the
top and bottom, and larger Ø5/16-18 posts on the left and
right side. The motor has two Ø5/16-18 terminal posts to
the right of the motor starter relay; upper and lower. The
positive cable of the 2-pole input is a black cable with a
red stripe and is connected to the left Ø5/16-18 relay post.
The right Ø5/16-18 relay post connects to the lower mo-
tor post with a short red cable. Note this cable may have
some abrasions to the red covering due to the tight fit of
the motor cover. The ground cable of the dual conductor
Motor/Starter Relay
Under Case
PO Check Valve
Pump Input
Purple Wire
HYDRO-Trap Operator’s Manual
Operation 3-11
INSPECTION
power is solid black and it connects to the upper motor post.
The upper #10-24 relay post is connected to the upper motor
post with a gray wire. The lower #10-24 relay post is con-
nected to the receiver by the motor relay input wire, aka the
“purple wire”.
Inspect the motor starter relay and all cables and wires for cor-
rosion, damage, loose studs, bolts, or nuts. Inspect the cables
to the two motor terminal posts for corrosion or damage.
Check under red terminal post covers. Check all double nut
connections and torque on all hardware to 3 ft-lbs. With dual
conductor power disconnected and receiver power working,
press the manual or remote buttons and listen to the motor
starter relay for a single click during each trap operation.
Inspection Step 3: Add Dual Conductor Power (Continued)
Reservoir
Breather Cap
Rear Open
Blue/Black
Front Open
White/Black
Front Trap Close
Green/Black
Rear Trap Close
Brown/Black
HYDRO-Trap Operator’s Manual
GENERAL MAINTENANCE
Repair and Service Parts
Part number Description
APP04780ACX ................................................................120-Amp Circuit Breaker, Manual Reset (Shur-Co Part # 1705861)
APP04780ZD ...................................................................40-Amp Circuit Breaker, SMARTwireTM (Shur-Co Part # 1126704)
APP04780AFS .................................................................Battery Disconnect Rotary Switch (Shur-Co Part # 1704283)
APP05225AD...................................................................Breather Cap w/ dipstick, KTI
APP04780YZ....................................................................Cab Wiring Kit, Master Disconnect, 120 amp, (Shur-Co Part # 1126492)
APP00511D......................................................................Cable Tie, Nylon: releaseable, 26” black
APP01048.........................................................................Cable Tie, 8”
APP05265C ......................................................................Charger, micro USB, 110-220 VAC, Kar-Tech
APP05265D......................................................................Charger, micro USB, car 12 VDC, Kar-tech
APP05225R ......................................................................Cover, Motor Starter Relay, KTI
APP04209BO...................................................................Cylinder, Aluminum, 1-1/2” bore x 1” rod x 46-3/16” stroke
APP04209BK....................................................................Cylinder, Aluminum, 1-1/2” bore x 1” rod x 34-1/4” stroke
APP04209BT....................................................................Cylinder, Steel, black, 1” bore x 1/2” rod x 34-1/4” stroke
APP04209CE....................................................................Cylinder, Steel, black, 1” bore x 1/2” rod x 46-3/16” stroke
APP04780AFT .................................................................Disconnect Switch Mounting Bracket (Shur-Co Part # 1118323)
APP04780AFU ................................................................Face Plate, Battery Disconnect Rotary Switch (Shur-Co Part # 1704284)
APP02363AX ...................................................................Harness, 7-way Receptacle w/Auxiliary Power Drop
APP03347OM..................................................................Harness, HYDRO-Trap, Power & Tarp
APP01648B ......................................................................Hydraulic Fluid, Hydrex MV Arctic 15 (5 gal.)
APP05225T.......................................................................*Obsolete* Replaced by APP05225AI (Hydraulic Power Unit, HYDRO-Trap)
APP05225AI.....................................................................Hydraulic Power Unit, HYDRO-Trap, KTI
GAA08280BOF...............................................................Manual Button Switch with Deutsch connector plug
APP05225U......................................................................*Obsolete* Replaced by APP05225AJ (Motor Starter Relay)
APP05225AJ....................................................................Motor Starter Relay, 12 VDC, 125 amp, 100% Duty Cycle, KTI
APP05225AF ...................................................................Motor, 12 VDC, IP65, Power Unit for APP05225AI, KTI
APP05225AE ...................................................................Plug, w/ neoprene gasket, KTI
GAA08280BRG...............................................................Receiver, Tarp Module, Smart 3, Shur-Co
APP05265F.......................................................................Receiver, HYDRO-Trap Control, Kar-Tech
APP05225V......................................................................Solenoid, Directional Control Valve, KTI
APP05225S.......................................................................Terminal Boot, 6 ga. Cable, Red
APP05265B ......................................................................Remote Control, 8 button, HYDRO-Trap, Kar-Tech
APP04780AAG ...............................................................Remote Control, Shur-Co Smart 3 Tarp Module (Shur-Co Part # 1126867)
APP04780YO...................................................................SMARTwireTM 25’ Extension (Shur-Co Part # 1704888)
APP04780YW ..................................................................SMARTwireTM 6’ Extension w/5/16” Ring Terminals (Shur-Co Part # 1126578)
APP04780AEQ................................................................SMARTwireTM Dual Conductor Socket 3’-6” (Shur-Co Part # 1126944)
APP04780OP...................................................................SMARTwireTM Junction Block Kit (Shur-Co Part # 1120849)
APP05225AC...................................................................Valve, Directional Control, Motor Center, KTI
APP05225AB ...................................................................Valve, Pilot Operated (PO) Check Valve, KTI
APP05225AA...................................................................Valve, Relief, 2500 psi (factory set), KTI
Hardware Install Guide
Component Max torque Wrench
Motor Starter Relay, Output.................................. 3 ft.lbs........................................1/2”
Motor Starter Relay, Input...................................... 2 ft.lbs........................................3/8”
Motor Starter Relay, Mount................................... 3 ft.lbs........................................1/2”
Motor Cable Post Hardware................................. 3 ft.lbs........................................13 mm
Manual Button Switch Nut ................................... 2 ft.lbs........................................3/4”
Nut on Top of Valve Solenoids ............................ 2 ft.lbs........................................3/4”
Hydraulic Power Unit Mount ............................... 15 ft.lbs. ....................................9/16”
Hydraulic Valves (AA,AB,AC) ............................... 18 ft.lbs. ....................................7/8” (use a deepwell socket)
End Fitting of Hydraulic Hose.............................. 2 FFWR......................................9/16”
“T” Fitting of Hydraulic Hose ................................ 15 ft.lbs. ....................................7/16”, 9/16”
900Fittings on Cylinders........................................ 15 ft.lbs. ....................................7/16”, 9/16”
900Fittings on Manifold......................................... 15 ft.lbs. ....................................9/16”, 11/16”
4-1 General Maintenance
HYDRO-Trap Operator’s Manual
GENERAL MAINTENANCE
Notes About Oil
• Hydraulic oil must be kept clean and dry to work correctly.
Contamination causes wear and can cause valves to stick.
Do not remove fill plug without cleaning the area around
the hole. In wet conditions use a rag to wipe excess water
off the top of the plug and reservoir before operating
traps.
• For oil to go out to the cylinders air needs to be allowed
to enter the reservoir through the fill plug vent. Keep the
top of the reservoir clear of debris and wipe clean often.
Remove fill plug and clean vent as needed.
• Correct oil must be used for acceptable performance and
system life. Oil must be mineral based with a viscosity and
must be between 10 and 100 cSt (mm^2/s) at ambient
outdoor operating temperatures. Oil thinner than 10 cSt
will damage the pump. Oil thicker than 100 cSt will reduce
power available to open traps and can cause the power
breaker to trip. Your system is supplied pre-filled with
Petro-Canada Hydrex MV Artic 15 hydraulic fluid, which
should give good performance from -20 to 120º F (-30 to
50º C) for operation outside this temperature range, or
with other fluids, consult with Wilson Trailer Co. Service
department.
Hydraulic Fluid
Changing the hydraulic fluid and cleaning the system is recom-
mended at least once per year or as needed. Drain hydraulic
oil from reservoir and remove reservoir from manifold (end
plate). Wipe down and remove all debris inside the reservoir,
also check the magnet for signs of metal particles. Lubricate
reservoir O-ring with hydraulic fluid to remount the reservoir.
Ensure the reservoir O-ring is not pinched or pushed out of
groove during installation.
General Maintenance 4-2
HYDRO-Trap Operator’s Manual
SCHEMATICS
Wiring Diagram
Harness, HYDRO-Trap, Power &Tarp
(APP-03347-OM)
SMARTwireTM 6’ Extension w/5/16” Ring Terminals
(APP-04780-YW)
SMARTwireTM
25’ Extension
(APP-04780-YO)
Harness, HYDRO-Trap, Power & Tarp
(APP-03347-OM)
SMARTwireTM Dual Conductor Socket 3’-6”
(APP-04780-AE-Q)
Harness, 7-way Receptacle w/Auxiliary Power Drop
(APP-02363-AX)
SMARTwireTM Junction Block Kit
(APP-04780-OP)
SMARTwireTM 40 Amp Circuit Breaker
(APP-04780-ZD)
Receiver, Tarp Module, Smart 3 Shur-Co
(GAA-08280-BR-G)
4-3 General Maintenance
HYDRO-Trap Operator’s Manual
TROUBLESHOOTING
General Maintenance 4-4
Potential Issues (See Resolution Procedures below)
No receiver lights and no pump operation ......................... See #’s 1, 2, 11, 15, 10.
Receiver green light and no pump operation..................... See #’s 3, 6, 7, 15.
Receiver lights go out when function is engaged.............. See # 3.
Trap stops after moving a foot or more............................... See #’s 3, 17, 19, 25, 22.
Manual buttons do not work................................................ See #’s 6, 11.
Remote control does not work............................................. See # 5.
Trap door lurches when moving. ......................................... See #’s 18, 25.
Single trap function issue ..................................................... See #’s 6, 11, 18, 19, 16, 22, 23, 25, 9.
Pump motor does not run..................................................... See #’s 3, 8, 7, 11, 15, 9, 14.
Pump runs by itself................................................................ See #’s 6, 7.
Continuous clicking noise from pump................................. See #’s 4, 15, 7.
Pump operates, traps do not respond ................................. See #’s 6, 11, 16, 20, 21, 25, 23, 19, 22.
Trap opens 1” to 3” without power ..................................... See #’s 18, 19, 25, 22.
Trap opens slowly.................................................................. See #’s 4, 14, 18, 21, 25, 15, 22, 24.
Trap will not run by manual buttons................................... See #’s 8, 11, 13, 12.
Tarp by remote misfires ........................................................ See # 12.
Tarp will not run by remote control..................................... See #’s 11, 15, 13, 12.
Confirm voltage is available at the 7-way plug between the
positive ABS center pin and the larger ground pin at the
top. The Hydro Trap receiver unit will need approximately
5 amps at 12 volts to function. Further testing may need
to be performed to confirm voltage and amperage supply
during the operation of the hydraulic pump motor.
Resolution Procedures
1. ABS Power from Tractor.
2. ABS Power to Receiver. Check for error lights on the receiver when the trailer
7-way is connected and powered. Inspect the 7 way
plug to the 7 way receptacle pins at the front of the
trailers. Above the kingpin, find the bullet connections
at the APP02363AX 7-way Grote main drops to the
APP03347OM power & tarp harness. Ensure both bullet
connections are completely seated (White for ground, Blue
for ABS power). Inspect Deutsch connection with red and
black wires near hydraulic power unit in apex near power
unit. Check voltage at plug. Use an ammeter to test for
available amperage. Minimum 5 amps required. Test at
the apex if Deutsch test leads are available; otherwise use
the bullet connection to the Grote ABS power..
WARNING
When working on a Hydraulic System, always insure
hydraulic lines have been depressurized. Hydraulic
injection can cause loss of fingers and even loss of life
in severe cases. Hydraulic injection can seem like a
bee sting. If you are ever bitten by hydraulic injection
go directly to the emergency room for treatment.
HYDRO-Trap Operator’s Manual
4-5 General Maintenance
TROUBLESHOOTING
Resolution Procedures
3. 120-Amp Circuit Breaker/
Disconnect Switch.
Check tractor for installation of 120 amp circuit breaker.
Ensure breaker is in the set position and the disconnect
switch is on for operation. Inspect parts for corrosion or loose
connections. Check two conductor plug for proper seating in
receptacle at the front of the trailer.
4. Tractor Power Low. Optimal power supply should be able to provide 100 to 120
amps for a full minute while maintaining at least 12 volts.
Check with clamp ammeter. 90 amps should be measured
during the operation of an empty trap. Tractor should remain
running during operation for optimal performance.
5. Transmitter Not Synched. Confirm remote control is charged. Flashing red light indicates
low power. Synchronize the remote and receiver by the
following steps:
• Make sure the receiver and remote are off
• Press and hold the power button on the remote for
more than 10 seconds. The red and green LEDs will start
flashing.
• Apply power to the receiver by connecting your 7 way
with hot center pin to trailer.
• Wait for a few seconds until only the green LED begins to
blink on the remote
• Synchronization can be performed at normal operational
distances. If not successful, repeat with the remote within
six feet of the receiver.
6. Manual Button Malfuction. Disconnect 7-way power and 2 pole power. Disconnect all
four manual button switch Deutsch connectors inside of the
rubrail. Reconnect the 7-way to power the receiver and turn
the remote control on. Confirm the receiver has a green light.
Press each trap function button while listening/feeling the
valve solenoids for operation. Confirm all functions have a
clear on/off output.
Examine the switch input Deutsch receptacles and observe
two small pins inside each one. Test the manual button inputs
by gently inserting a conductive contact (key, bolt, paperclip)
to touch both pins and listen for clicking sounds. Do not
damage the pins. Listen/feel the valve solenoid operations
as previously done with the remote control. Confirm all four
inputs have a clear on/off output. If an input does not have
a reaction at the valve solenoid, it may be a valve solenoid or
directional control valve issue.
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