paladin JRB SMART-LOC User manual

SMART-LOC®COUPLER
PATENTED
SERIAL NUMBER: ___________________
MODEL NUMBER: ___________________
FOR
EXCAVATORS
OPERATOR’S MANUAL
800-428-2538 I www.paladinattachments.com 820 Glaser Parkway, Akron, OH 44306, United States of America Copyright ©
Manual Number: OM90A
Date: June 2019
Rev. 4

3
OM90A
TABLE OF CONTENTS
PREFACE....................................................................................................................................................... 5
SAFETY PRECAUTIONS
SAFETY STATEMENTS ..................................................................................................................... 6
GENERAL SAFETY PRECAUTIONS.............................................................................................. 6-8
EQUIPMENT SAFETY PRECAUTIONS ....................................................................................... 9-12
DECALS
DECAL PLACEMENT....................................................................................................................... 13
INSTALLATION
NOMENCLATURE............................................................................................................................ 14
INSTALLATION PROCEDURE......................................................................................................... 15
OPERATION
INTENDED USE............................................................................................................................... 16
LOCKING SYSTEM OPERATION.................................................................................................... 17
COUPLER CONTROL BOX ............................................................................................................. 18
HYDRAULIC SCHEMATIC - HIGH PRESSURE SYSTEM .............................................................. 19
HYDRAULIC SCHEMATIC - LOW PRESSURE SYSTEM ............................................................... 20
LOCKING ATTACHMENT................................................................................................................. 21
UNLOCKING ATTACHMENT............................................................................................................ 22
STORAGE ........................................................................................................................................ 24
LIFT and TIE DOWN POINTS .......................................................................................................... 24
TRANSPORTING ............................................................................................................................. 24
MAINTENANCE & SERVICE
MAINTENANCE SCHEDULE ........................................................................................................... 25
COUPLER GREASING .................................................................................................................... 26
COUPLER CYLINDER REMOVAL / REPLACEMENT..................................................................... 27
TROUBLESHOOTING................................................................................................................................. 28
SPECIFICATIONS
BOLT TORQUE SPECIFICATIONS.................................................................................................. 29
PARTS / LIMITED WARRANTY .................................................................................................................. 31

4OM90A
THIS PAGE IS
INTENTIONALLY
BLANK

5
OM90A
PREFACE
GENERAL COMMENTS
Congratulations on the purchase of your new JRB product! This product was carefully designed
and manufactured to give you many years of dependable service. Only minor maintenance (such as
cleaning and lubricating) is required to keep it in top working condition. Be sure to observe all main-
tenance procedures and safety precautions in this manual and on any safety decals located on the
product and on any equipment on which the attachment is mounted.
This manual has been designed to help you do a better, safer job. Read this manual carefully
and become familiar with its contents.
WARNING! Never let anyone operate this unit without reading the "Safety Precautions"
and "Operating Instructions" sections of this manual.
Always choose hard, level ground to park the vehicle on and set the brake
so the unit cannot roll.
Unless noted otherwise, right and left sides are determined from the operator’s control position
when facing the attachment.
NOTE: The illustrations and data used in this manual were current (according to the information
available to us) at the time of printing, however, we reserve the right to redesign and change the
attachment as may be necessary without notication.
BEFORE OPERATION
The primary responsibility for safety with this equipment falls to the operator. Make sure the
equipment is operated only by trained individuals that have read and understand this manual. If there is
any portion of this manual or function you do not understand, contact your local authorized dealer or the
manufacturer. Keep this manual available for reference. Provide this manual to any new owners and/or
operators.
SAFETY ALERT SYMBOL
This is the "Safety Alert Symbol" used by this industry. This symbol is used to warn of
possible injury. Be sure to read all warnings carefully. They are included for your safety
and for the safety of others working with you.
SERVICE
Use only manufacturer replacement parts. Substitute parts may not meet the required stan-
dards.
Record the model and serial number of your unit on the cover of this manual. The parts depart-
ment needs this information to insure that you receive the correct parts.
SOUND AND VIBRATION
Sound pressure levels and vibration data for this attachment are inuenced by many di󰀨erent param-
eters; some items are listed below (not inclusive):
• prime mover type, age condition, with or without cab enclosure and conguration
• operator training, behavior and stress level
• job site organization, working material condition and environment
Based on the uncertainty of the prime mover, operator and job site it is not possible to get precise ma-
chine and operator sound pressure levels or vibration levels for this attachment.
NOTE: A list of all Paladin Patents can be found at http://www.paladinattachments.com/patents.asp.

6OM90A
SAFETY STATEMENTS
DANGER
GENERAL SAFETY PRECAUTIONS
WARNING! READ MANUAL PRIOR TO INSTALLATION
Improper installation, operation, or maintenance of this equipment could result in se-
rious injury or death. Operators and maintenance personnel should read this manual,
as well as all manuals related to this equipment and the prime mover thoroughly
before beginning installation, operation, or maintenance. FOLLOW ALL SAFETY
INSTRUCTIONS IN THIS MANUAL AND THE PRIME MOVER’S MANUAL(S).
READ AND UNDERSTAND ALL SAFETY STATEMENTS
Read all safety decals and safety statements in all manuals prior to operating or
working on this equipment. Know and obey all OSHA regulations, local laws, and
other professional guidelines for your operation. Know and follow good work prac-
tices when assembling, maintaining, repairing, mounting, removing, or operating this
equipment.
KNOW YOUR EQUIPMENT
Know your equipment’s capabilities, dimensions, and operations before operating.
Visually inspect your equipment before you start, and never operate equipment that
is not in proper working order with all safety devices intact. Check all hardware to
ensure it is tight. Make certain that all locking pins, latches, and connection devices
are properly installed and secured. Remove and replace any damaged, fatigued, or
excessively worn parts. Make certain all safety decals are in place and are legible.
Keep decals clean, and replace them if they become worn or hard to read.
WARNING
CAUTION
NOTICE
THIS SYMBOL BY ITSELF OR WITH A WARNING WORD THROUGHOUT THIS MAN-
UAL IS USED TO CALL YOUR ATTENTION TO INSTRUCTIONS INVOLVING YOUR
PERSONAL SAFETY OR THE SAFETY OF OTHERS. FAILURE TO FOLLOW THESE
INSTRUCTIONS CAN RESULT IN INJURY OR DEATH.
THIS SIGNAL WORD INDICATES A HAZARDOUS SITUATION WHICH, IF
NOT AVOIDED, WILL RESULT IN DEATH OR SERIOUS INJURY.
THIS SIGNAL WORD INDICATES A HAZARDOUS SITUATION WHICH, IF
NOT AVOIDED, COULD RESULT IN DEATH OR SERIOUS INJURY.
THIS SIGNAL WORD INDICATES A HAZARDOUS SITUATION WHICH, IF
NOT AVOIDED, COULD RESULT IN MINOR OR MODERATE INJURY.
NOTICE IS USED TO ADDRESS PRACTICES NOT RELATED TO PHYSICAL
INJURY.

7
OM90A
GENERAL SAFETY PRECAUTIONS
WARNING! PROTECT AGAINST FLYING DEBRIS
Always wear proper safety glasses, goggles, or a face shield when driving pins in or
out, or when any operation causes dust, ying debris, or any other hazardous mate-
rial.
WARNING! LOWER OR SUPPORT RAISED EQUIPMENT
Do not work under raised booms without supporting them. Do not use support mate-
rial made of concrete blocks, logs, buckets, barrels, or any other material that could
suddenly collapse or shift positions. Make sure support material is solid, not de-
cayed, warped, twisted, or tapered. Lower booms to ground level or on blocks. Lower
booms and attachments to the ground before leaving the cab or operator’s station.
WARNING! USE CARE WITH HYDRAULIC FLUID PRESSURE
Hydraulic uid under pressure can penetrate the skin and cause serious injury or
death. Hydraulic leaks under pressure may not be visible. Before connecting or dis-
connecting hydraulic hoses, read your prime mover’s operator’s manual for detailed
instructions on connecting and disconnecting hydraulic hoses or ttings.
•Keep unprotected body parts, such as face, eyes, and arms as far away as
possible from a suspected leak. Flesh injected with hydraulic uid may develop
gangrene or other permanent disabilities.
• If injured by injected uid, see a doctor at once. If your doctor is not familiar with
this type of injury, ask him or her to research it immediately to determine proper
treatment.
• Wear safety glasses, protective clothing, and use a piece of cardboard or wood
when searching for hydraulic leaks. DO NOT USE YOUR HANDS! SEE ILLUS-
TRATION.
CARDBOARD
HYDRAULIC HOSE
OR FITTING
MAGNIFYING GLASS
FIG00001

8OM90A
GENERAL SAFETY PRECAUTIONS
WARNING! DO NOT MODIFY MACHINE OR ATTACHMENTS
Modications may weaken the integrity of the attachment and may impair the func-
tion, safety, life, and performance of the attachment. When making repairs, use only
the manufacturer’s genuine parts, following authorized instructions. Other parts may
be substandard in t and quality. Never modify any ROPS (Roll Over Protection
Structure) or FOPS (Falling Object Protective Structure) equipment or device. Any
modications must be authorized in writing by the manufacturer.
WARNING! SAFELY MAINTAIN AND REPAIR EQUIPMENT
•Do not wear loose clothing or any accessories that can catch in moving parts. If
you have long hair, cover or secure it so that it does not become entangled in the
equipment.
• Work on a level surface in a well-lit area.
• Use properly grounded electrical outlets and tools.
• Use the correct tools for the job at hand. Make sure they are in good condition for
the task required.
• Wear the protective equipment specied by the tool manufacturer.
SAFELY OPERATE EQUIPMENT
Do not operate equipment until you are completely trained by a qualied operator
in how to use the controls, know its capabilities, dimensions, and all safety require-
ments. See your machine’s manual for these instructions.
•Keep all step plates, grab bars, pedals, and controls free of dirt, grease, debris,
and oil.
• Never allow anyone to be around the equipment when it is operating.
• Do not allow riders on the attachment or the prime mover.
• Do not operate the equipment from anywhere other than the correct operator’s
position.
• Never leave equipment unattended with the engine running, or with this attach-
ment in a raised position.
• Do not alter or remove any safety feature from the prime mover or this attach-
ment.
• Know your work site safety rules as well as tra󰀩c rules and ow. When in doubt
on any safety issue, contact your supervisor or safety coordinator for an explana-
tion.
WARNING! CALIFORNIA PROPOSITION 65 WARNING
This product may contain a chemical known to the state of California to cause cancer,
or birth defects or other reproductive harm. www.P65Warnings.ca.gov

9
OM90A
EQUIPMENT SAFETY PRECAUTIONS
WARNING! KNOW WHERE UTILITIES ARE
Observe overhead electrical and other utility lines. Be sure equipment will clear
them. When digging, call your local utilities for locqtion of buried utility lines, gas,
water, and sewer, as well as any other hazard you may encounter.
WARNING! EXPOSURE TO RESPIRABLE CRYSTALLINE SILICA DUST
ALONG WITH OTHER HAZARDOUS DUSTS MAY CAUSE
SERIOUS OR FATAL RESPIRATORY DISEASE.
It is recommended to use dust suppression, dust collection and if necessary
personal protective equipment during the operation of any attachment that may
cause high levels of dust.
WARNING! REMOVE PAINT BEFORE WELDING OR HEATING
Hazardous fumes/dust can be generated when paint is heated by welding, soldering
or using a torch. Do all work outside or in a well ventilated area, and dispose of paint
and solvent properly. Remove paint before welding or heating.
When sanding or grinding paint, avoid breathing the dust. Wear an approved respira-
tor. If you use solvent or paint stripper, remove stripper with soap and water before
welding. Remove solvent or paint stripper containers and other ammable material
from area. Allow fumes to disperse at least 15 minutes before welding or heating.
WARNING! END OF LIFE DISPOSAL
At the completion of the useful life of the unit, drain all uids and dismantle by sepa-
rating the di󰀨erent materials (rubber, steel, plastic, etc.). Follow all federal, state and
local regulations for recycling and disposal of the uid and components.
OPERATING THE ATTACHMENT
• Never use your attachment for a work platform or personnel carrier.
• Do not exceed the lifting capacity of your prime mover.
• Operate only from the operator’s station.
• When operating on slopes, drive up and down, not across. Avoid steep hillside op-
eration, which could cause the prime mover to overturn.
• Reduce speed when driving over rough terrain, on a slope, or turning, to avoid over-
turning the vehicle.
• An operator must not use drugs or alcohol, which can change his or her alertness or
coordination. An operator taking prescription or over-the-counter drugs should seek
medical advice on whether or not he or she can safely operate equipment.
• Never lift, move, or swing a load or attachment over anyone.
• Before exiting the prime mover, lower the attachment to the ground, apply the
brakes, turn o󰀨 the prime mover’s engine and remove the key.
KEEPATTACHMENTCLOSETOTHEGROUNDDURINGALL
LOCK AND UNLOCK OPERATIONS.
Attachment can drop without warning if not properly secured. Visually check the
coupler is securely locked on attachment. Follow procedures described in this
manual for checking t between coupler and attachment. Failure to do so could
result in serious injury or death.
WARNING!

10 OM90A
UNDERSTAND EFFECTIVE REACH OF ATTACHMENTS
The coupler increases the distance between the stick and the attachment. The e󰀨ective
“reach” of the attachment will be increased.
EQUIPMENT SAFETY PRECAUTIONS
CLEAR COUPLER OF DEBRIS BEFORE OPERATING
Make sure coupler is free of debris prior to operation. Debris can interfere with the
locking mechanism not allowing it to function properly.
DO NOT USE BUCKET IN SHOVEL POSITION
Attaching a bucket in a reverse orientation on the coupler is NOT recommended.
The lift eye or other portion of the bucket may interfere with the machine stick while
in the full curl position. The locking mechanism of the coupler WILL NOT work prop-
erly if the bucket is in the reverse orientation.
MODIFICATIONSTOMACHINESTICKCOULDINTERFERWITH
COUPLER OPERATION
Check for modications to the underside of the machine stick prior to operation. Such
modications including, but not limited to, accepting a grapple, thumb or the addition
of a reinforcement plate may cause interference with the locking mechanism of the
coupler. DO NOT operate the coupler if the possibility of interference exists. Doing
so may cause damage to the coupler and will void warranty.
WARNING!
WARNING!
Depending on the specic coupler and attachment combination, it may be possible
for the attachment to come in contact with the upper structure of the excavator (cab,
boom, cylinders,etc.). The operator should familiarize themself with any potential
interference locations prior to use.

11
OM90A
EQUIPMENT SAFETY PRECAUTIONS
MEASURE TRAVEL HEIGHT AND LENGTH PRIOR TO
TRANSPORTING
The overall travel height and/or length of the prime mover will be increased if the coupler
and attachment are installed. Do not rely on original prime mover specications to
determine overall dimensions. Actual dimensions will be a󰀨ected by specic coupler
and attachment combination.
The JRB coupler is designed with a lift eye for lifting and placing material. It is de-
signed for the convenience of the operator. Consult your prime mover manufacturers
specications for lifting procedures and capacities. Incorrect applications and uses
and failure to follow these instructions may result in severe injury or death.
LIFT EYE USAGE
In order to use the lift eye correctly and safely the attachment must rst be removed
from the coupler. Not only is this the safe method, it also increases the lifting capac-
ity of the machine. When an attachment is in use with the coupler, the chain, cable
or other lifting device can contact it and may cause interference, damage or poten-
tial for unexpected release.
The lifting device must always be removed when changing attachments. If the
device is in the area of the coupler or attachment during coupling, it may cause an
incomplete locking of the coupler to the attachment or damage to the coupler and/or
the attachment.
WARNING!
The JRB Coupler has been extensively studied and tested, for both e󰀩ciency and
safety, using the JRB hydraulic kit.
The JRB Coupler has not been studied or tested using any other hydraulic system.
Since hydraulic systems vary in many aspects, JRB cannot know whether the
coupler may be operated safely with a hydraulic system that is not its own. Because
of the unknown characteristics of any other hydraulic system, JRB takes no
responsibility for the safety of a JRB coupler if it is operated with a hydraulic system
other than the one provided by JRB.
ONLY USE JRB PROVIDED HYDRAULIC KIT TO OPERATE
THE COUPLER
WARNING!
TRANSPORTING THE ATTACHMENT
• Travel only with the attachment in a safe transport position to prevent uncontrolled
movement. Drive slowly over rough terrain and slopes.
• When transporting on a trailer secure attachment at recommended tie down
locations using tie down accessories that are capable of maintaining attach-
ment stability.
• When driving on public roads use safety lights, reectors, Slow Moving Vehicle signs
etc., to prevent accidents. Check local government regulations that may a󰀨ect you.
• Do not drive close to ditches, excavations, etc., as a cave-in could result.
• Do not smoke when refueling the prime mover. Allow room in the fuel tank for
expansion. Wipe up any spilled fuel. Secure cap tightly when done.

12 OM90A
REMOVE THE ATTACHMENT FROM THE COUPLER AT THE
END OF EACH SHIFT.
Failure to do so could cause increasing tightness of the locking mechanism, causing it
to become di󰀩cult to uncouple.
MAINTAINING THE ATTACHMENT
• Before performing maintenance (unless otherwise specied), lower the attach-
ment to the ground, apply the brakes, turn o󰀨 the engine and remove the key.
• Never perform any work on the attachment unless you are authorized and
qualied to do so. Always read the operator service manuals before any repair
is made. After completing maintenance or repair, check for correct functioning
of the attachment. If not functioning properly, always tag “DO NOT OPERATE”
until all problems are corrected.
• Worn, damaged, or illegible safety decals must be replaced. New safety de-
cals can be ordered from your local dealer or the manufacturer.
• Never make hydraulic repairs while the system is under pressure. Serious
personal injury or death could result.
• Never work under a raised attachment.
EQUIPMENT SAFETY PRECAUTIONS

13
OM90A
ITEM# A67355
WARNING! HIGH PRESSURE FLUID
ITEM# A67356
WARNING! MISUSE HAZARD
APPROX. 4” X 2.75”
HIGH PRESSURE FLUID
HAZARD
Relieve pressure before
disconnecting lines.
DO NOT use hands to check
for leaks.
Consult physician immediately
if skin penetration occurs.
A66701
APPROX. 4” X 2.75”
Read and understand the
operator’s manual before
operating.
Coupler may drop attachment
if not operated properly.
Contact your nearest dealer for
replacement manual and safety
labels.
A66702
MISUSE HAZARD
A67355
A67356
Serial Tag
DECALS
DECAL PLACEMENT
GENERAL INFORMATION
The following diagram(s) show the location of the decals used on your attachment. The decals are
identied by their part numbers, with reductions of the actual decals shown on the following pages. Use
this information to order replacements for lost or damaged decals. Be sure to read all the decals before
operating coupler. They contain information you need to know for both safety and product longevity.
IMPORTANT: Keep all safety decals clean and legible. Replace all missing, illegible or damaged safety
decals. When replacing parts with safety decals attached, the safety decals must also be replaced.
REPLACING SAFETY DECALS: Clean the area of application with nonammable solvent, then wash
the same area with soap and water. Allow surface to fully dry. Remove the backing from the safety de-
cal, exposing the adhesive surface. Apply the safety decal to the positon shown in the diagram above
and smooth out any bubbles.

14 OM90A
NOMENCLATURE
Throughout this manual reference is made to various components. The purpose of this section is
to help you become familiar with the names of these components. This knowledge will be helpful
when reading through this manual.
Lock Arm
Lock Wedge
Cylinder
Torsion
Spring
Attachment
Pin
INSTALLATION

15
OM90A
INSTALLATION
With coupler sitting on the ground and positioned
as shown, align the end of the machine stick.
STEP 1
STEP 2
STEP 3
STEP 4
Slowly lower machine stick into place until the pin
holes of the stick and coupler are aligned. Make
sure any OEM o-rings are reinstalled as required.
Install OEM pin and secure with locking hardware.
Slowly lower machine link into place until the pin
holes of the link and coupler are aligned.
Install OEM pin.
Secure pin using locking hardware.
STEP 5
Remove attachment from machine and set aside
the OEM pins and pin locking hardware. The OEM
pins will be used to install the coupler to the
machine.
The pins and pin locking hardware provided with
the coupler are to be used in the attachment.
Install coupler hydraulic kit onto machine.
Refer to the JRB Hydraulic Kit Manual for
your specic machine for installation
instructions.
Connect hydraulic hoses from the machine
to the coupler cylinder.
Start engine and rotate coupler to full curl
position.
Cycle coupler cylinder several times to purge
any air from the system. Check for proper
hydraulic connection, hose routing and hose
length. Check for proper assembly, installation
and hydraulic leaks.

16 OM90A
Some examples of misuse include, but are not limited to, the following:
Moving or lifting attachments
by front pin only
Using hooks and locking plate
to lift or move objects
Using coupler to position
or hammer objects into the
ground
Using any part of coupler,
other than lift eye, to lift
objects with chain or sling


OPERATION
INTENDED USE
The JRB Smart-Loc® Coupler is designed as a tool to provide an e󰀩cient way for the operator to
attach, detach and interchange between di󰀨erent attachments with ease. It can accommodate a variety of
attachments, including demolition attachments, rippers and hammers. Use in any other way is considered
contrary to the intended use.
NOTICE:Do not use coupler with a mechanical style pulverizer. Damage to the coupler may result
which will void warranty. Mount pulverizer directly to the prime mover.

17
OM90A
The diagrams on this page illustrate the function of the coupler’s locking system during lock and unlock
operations. Refer to the Operation Section of this manual for lock and unlock procedure of the coupler.
The coupler shown is in the correct lock position.
The lock wedge is extended over the back attachment
pin and the secondary lock arm is in position behind
the lock wedge. In this position the lock wedge can
not retract far enough to release the pin in the event
of a hydraulic failure.
JRB excavator couplers are powered using hydraulic uid diverted from the machine
bucket cylinder circuit by an electric solenoid valve. The coupler is locked by default
and the solenoid is energized only during the unlock sequence.
LOCKED:
The JRB Smart-Loc® Coupler places a heavy emphasis on safety with a unique locking mechanism.
A pilot operated check valve assures the hydraulic cylinder is locked in case of hydraulic pressure loss. A
primary wedge locking system which adjusts for wear, keeping a tight connection on the attachment pin.
Furthermore, a secondary lock which consists of a mechanical lock arm that prevents the lock wedge from
accidentally being retracted or retracting in case of loss of cylinder force.
NOTE: This coupler can be operated with the JRB designed high or low pressure hydraulic system.
When the coupler is rotated to the full curl position,
the secondary lock arm contacts the underside of the
machine stick. This rotates the lock arm from its posi-
tion behind the lock wedge. The lock wedge can now
fully retract and disengage the attachment pin.
NOTE: Modications to the underside of the ma-
chine stick may interfer with the proper operation
of the coupler locking mechanism. DO NOT operate
the coupler if the possibility of interference exists.
Doing so may cause damage to the coupler and
will void warranty.
UNLOCKED:
THE SECONDARY LOCK IS NOT INTENDED TO BE
USED AS THE PRIMARY LOCKING SYSTEM FOR THE
COUPLER.
Lock Arm contacting
underside of machine stick
Lock Arm
rotates allowing
Lock Wedge to
fully retract and
release pin.
Lock Arm positioned
behind Lock Wedge ,
preventing full retraction
Lock Wedge extended
against attachment pin.
OPERATION

18 OM90A
Press
and hold
unlock button
to activate
COUPLER CONTROL
COUPLER CONTROL BOX
UNLOCKING PROCEDURE:
Rotate machine stick in toward machine cab. With coupler in full
curl position and held over relief, activate the unlock sequence by
pressing and holding the UNLOCK button on the control box (approx.
two to three seconds). This is to prevent accidental unlocking of the
coupler if the switch is inadvertently hit.
The UNLOCK button will light up and stay on. An internal buzzer will
sound and remain on as long as the control box is in UNLOCK mode.
LOCKING PROCEDURE:
To activate the lock sequence, press the LOCK button. The LOCK
button will light up and blink for ve seconds followed by an audible
beep. The green LED will then remain on.
NOTE: The LOCK button can be pressed at any time to trigger
the lock sequence.
OPERATION
TROUBLESHOOTING CONTROL BOX
If an error occurs in the control box circuit, a continuous audible alarm will sound and
signal lights will either ash or remain on. To determine the cause of the error, perform the fol-
lowing steps
1. Check the control box for damage. If any part of the control box is cracked or broken, it will
need replaced.
2. Check wire harness for damage. Damage to the wire harness may cause a shorted or open
circuit. Repair or replace if necessary.
3. If the problem was able to be repaired, the box will need reset to remove the error condi-
tion.
4. If the alarm continues after resetting the control box, call Paladin Customer Service.
RESETTING CONTROL BOX
To reset the control box do the following:
1. Turn the machine ignition to OFF.
2. Make sure control box is completely powered down (no buzzer and no lights).
3. While pressing both the LOCK and UNLOCK buttons, turn the machine ignition ON.
NOTICE! DO NOT try to override the control box and connect the valve coils directly to
voltage. Doing so may cause damage to the control box.
NOTE: Some prime movers will require a di󰀨erent style control switch for operating the
coupler. Refer to the instructions included with your hydraulic kit for details.

19
OM90A
Note: The JRB Excavator Coupler is designed to be locked when there is no electrical power. In
other words, the coupler is locked by default. Electrical power is required to unlock the coupler.
The system shown is in the LOCKED position (no electrical power to solenoid). System pressure applied
to bucket cylinder line “A” or “B” is transferred through valve port C2 or C1 respectively. The pressure is
then sent through CV1 or SV2/CV2, through solenoid valve SV1 and charges the head end of the coupler
cylinder. The system maintains a positive force on the locking plate at all times while the bucket cylinder
is pressurized.
With the switch in the UNLOCK position (electrical power applied to both solenoids SV1 and SV2) and line
A pressurized; pressure is transferred through CV1 and SV1 and energizes the rod-end of the coupler
cylinder to retract the coupler locking plate. Hydraulic uid from the head end of the coupler cylinder moves
through the “EXT” port back through SV1, CV3, and SV2 and drains into line B. When line B is energized,
the locking plate can not be retracted.
HYDRAULIC SCHEMATIC - HIGH PRESSURE SYSTEM
OPERATION

20 OM90A
HYDRAULIC SCHEMATIC - LOW PRESSURE SYSTEM
HYDRAULIC
RESERVOIR
SWITCH
MAIN
PUMP
CT4
CT1 CT2 CT3
+V
RET
EXT
R
E
COUPLER
CYLINDER
SOLENOID VALVE
SYSTEM SHOWN IN “LOCKED” POSITION
SOLENOID IS NOT ACTIVEATED.
The schematic shown is in the LOCKED position (no electrical power to solenoid). System pressure is
applied to the valve by the main hydraulic pump of the prime mover, the bucket circuit is also pressurized
through the main control valve. System pressure is transferred through valve port “P” to sequence valve
CT1. CT1 remains closed until the bucket cylinder pressure reaches 4000 PSI or over. At 4000 PSI CT1
opens and allows a maximum of 3250 PSI to be transferred through sequence valve CT2, valve CT3
and charges the head end of the coupler cylinder. The system maintains a positive force on the locking
plate at all times while the bucket cylinder is pressurized.
With the switch in the UNLOCK position (electrical power applied CT3). Pressure is transferred through
CT1, CT2, CT3 and energizes the rod-end of the coupler cylinder to retract the coupler locking plate.
Hydraulic uid from the head end of the coupler cylinder moves through the “EXT” port back through
CT3 and drains into the hydraulic reservoir.
Note: The JRB Excavator Coupler is designed to be locked when there is no electrical power. In
other words, the coupler is locked by default. Electrical power is required to unlock the coupler.
OPERATION