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FEATURES AND BENEFITS

PREVENTIVE MAINTENANCE

The service life of a tool can be greatly improved with proper care and maintenance.  To extend 

the life of your BURNDY® MRC840 mechanical crimp tool keep it clean and well lubricated.  Oil 

all pivoting points every three months.

SERVICE

OTHER THAN THE MAINTENANCE TASKS DESCRIBED ABOVE, THESE TOOLS ARE NOT 

USER SERVICEABLE. COMPLETE DISASSEMBLY OF THE TOOL IS NOT RECOMMENDED. 

SHOULD SERVICE BE REQUIRED,  RETURN THE TOOL TO THE BURNDY® TOOL SERVICE 

CENTER OR A BURNDY® AUTHORIZED TOOL REPAIR CENTER.  CALL 1-800-426-8720 FOR 

ADDITIONAL INFORMATION.

FEATURES

BENEFITS

-Comfort grip handles

Aids in prevention of hand slippage

-Heat treated steel jaws

Reduces jaw buckling and missalignment 

under heavy loading

-No tool adjustment required

Provides reliable & consistent crimps

-Approximately 9000 crimp cycle life

Lasts longer than  imitations and will still be 

working when others have worn out

-Diewheel locking plate w/rotatable die wheel

Easily indexed to the desired crimp position 

Ensures a quality crimp

-Multiple crimp selections on a rotatable die 

wheel

No lost dies

-High strength fasteners

Increases tool life by reducing tool wear

-Plated jaws

Provides enhanced corrosion protection

SPECIFICATIONS

Crimps YA,  YA-L,  YS,  YS-L  series connectors on #8 AWG through 4/0 AWG stranded copper conductor.

Connector/conductor combinations are UL

 

Listed when installed in accordance with the installation chart.

OPERATION

The color coded rotatable crimp die wheel rotates to provide a proper match of the die wheel and 

color coded connector.  The die index is embossed onto the connector after the crimp is completed 

for permanent inspection capability.

To index die wheel to desired crimp position:

A.

B.

C.

D.

Open handles fully.

Press die pin.

Rotate die to the desired crimp groove.

Release die pin.  Be sure the locking plate is back in its home position.

For more information contact:   

BURNDY®

 

 

 

 

 

150 BURNDY Road

 

 

 

 

 

Littleton, NH  03561

 

 

 

 

 

or call, toll free 1-800-426-8720

Additional or replacement manuals may be obtained free of charge from the BURNDY® Service Center.

CAUTION:  

The locking plate must be in the home position.  Cycling the tool with the locking 

plate out from the home position may result in permanent damage to the die pin.

INSTALLATION CHART

DIE PLATE

(HOME POSITION)

DIE PIN

(REVERSE SIDE)

MRC840 TOOL INSTALLATION CHART

CONDUCTOR 

(COPPER)

CONNECTOR (CU)

COLOR 

CODE

DIE 

INDEX

NO. OF 

CRIMPS

2 CRIMPS

HYLUG™ 

TERM

HYLINK™ 

SPLICE

#8 AWG STR.

YA8C-

YS8C-

RED

49

1

ST

ANDARD BARREL

    (-L)

2

LONG BARREL

#6 AWG STR.

YA6C-

YS6C-

BLUE

7

1

2

#5 AWG STR.

YA5C-

YS5C-

BLUE

7

1

2

#4 AWG STR.

YA4C-

YS4C-

GRAY

8

1

2

#2 AWG STR.

YA2C-

YS2C-

BROWN

10

1

2

#1 AWG STR.

YA1C-

YS1C-

GREEN

11

1

2

1/0 AWG STR.

YA25-

YS25-

PINK

12

2

4

2/0 AWG STR.

YA26-

YS26-

BLACK

13

2

4

3/0 AWG STR.

YA27-

YS27-

ORANGE

14

2

4

4/0 AWG STR.

YA28-

YS28-

PURPLE

15

2

4

         THE ABOVE CONNECTOR/CONDUCTOR COMBINATIONS ARE UL LISTED WHEN 

INSTALLED WITH THIS TOOL.

OIL ALL PIVOTING POINTS EVERY THREE MONTHS

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