BIRO 542 User manual

HEAVY HORSEPOWER GRINDER
OPERATING MANUAL & PARTS LIST
Models 342, 542, 548, 552, 7542, 7548, 7552, 1056, 1556
Applicable on HHP Grinders starting with Serial No. 2250
PTCT
H400-078A
7-04-22
+IMPORTANT NOTICE +
This Manual contains important
safety instructions which must
be strictly followed when using
this equipment.
Biro Designed Biro Built
PTCT
H400-078A
4-13-25

NOTICE TO OWNERS AND OPERATORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
SAFETY TIPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
UNCRATING AND SET UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
MOTOR WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
ELECTRICAL REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
MOTOR SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
TO PROCESS PRODUCT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
GRINDING BOWL INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
BEARING HOUSING LUBRICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
ROLLER CHAIN AND DRIVE SPROCKET LUBRICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
MAIN DRIVE CHAIN TENSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
OPTIONAL EAGLE DRIVE BELT TENSIONING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . .10 & 11
PARTS DIAGRAMS, MAIN BODY AND DRIVE SYSTEM
FOR 3, 5, 7
1/2
HORSEPOWER GRINDERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
AND WARNING LABELS & LOCATIONS ON GRINDERS
PARTS DIAGRAMS, BOWL AND TRAY SECTION
FOR 3, 5, 7
1/2
HORSEPOWER GRINDERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
AND WARNING LABELS & LOCATIONS ON GRINDERS
ELECTRICAL CONTROLS FOR 3, 5, 7
1/2
HORSEPOWER GRINDERS . . . . . . . . . . . . . . .14 & 15
PARTS DIAGRAMS, MAIN BODY AND DRIVE SYSTEM
FOR 10 & 15 HORSEPOWER GRINDERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
AND WARNING LABELS & LOCATIONS ON GRINDERS
PARTS DIAGRAMS, BOWL AND TRAY SECTION
FOR 10 & 15 HORSEPOWER GRINDERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
AND WARNING LABELS & LOCATIONS ON GRINDERS
ELECTRICAL CONTROLS FOR 10 & 15 HORSEPOWER GRINDERS . . . . . . . . . . . . . . . . . . . . .18
OPERATOR’S NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 & 20
OPERATOR’S SIGNATURE PAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
LIMITED WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

BIRO’s products are designed to process food products safely and efficiently. Unless the oper-
ator is properly trained and supervised, however, there is the possibility of a serious injury. It is the
responsibility of the owner to assure that this machine is used properly and safely, strictly following
the instructions contained in this Manual and any requirements of local law.
No one should use or service this machine without proper training and supervision. All opera-
tors should be thoroughly familiar with the procedures contained in this Manual. Even so BIRO
cannot anticipate every circumstance or environment in which its products will be used. You, the
owner and operator, must remain alert to the hazards posed by the function of this equipment –
particularly the ROTATING GRINDING WORM, which can severely injure an inattentive operator
amputating fingers and limbs. No one under eighteen (18) years of age should operate this equip-
ment. If you are uncertain about a particular task, ask your supervisor.
This Manual contains a number of safe practices in the SAFETY TIP section. Additional warn-
ings are placed throughout the Manual. Warnings related to your personal safety are indicated by:
Warnings related to possible damage are indicated by:
BIRO also has provided warning labels on the equipment. If any warning label or Manual be-
comes misplaced, damaged, or illegible, please contact your nearest Distributor or BIRO directly
for a replacement.
Remember, however, this Manual or the warning labels do not replace the need to be alert and
to use your common sense when using this equipment.
This Manual applies to machines with serial number 2250 and higher.
1
NOTICE TO OWNERS AND OPERATORS
OR
- NOTE -
A copy of this manual is included with each HEAVY HORSEPOWER GRINDER.
The descriptions and illustrations contained in this manual are not binding.
The manufacturer reserves the right to introduce any modification
without updating the manual.

SAFETY TIPS
ROTATING GRINDING WORM
TO AVOID SERIOUS PERSONAL INJURY
NEVER Touch This Machine Without Training and Authorization By Your Supervisor.
ALWAYS Read Operation and Service Manual BEFORE Operating, Cleaning or Servicing.
NEVER Place Hands Into Machine Input or Output Openings.
NEVER Open Machine During Operation.
ONLY Use a Qualified Electrician to Install According to Local Building Codes: Machine MUST
Be Properly Grounded.
ALWAYS Connect to Proper Voltage & Phase.
ONLY Install on Level, Non-Skid Surface in a Clean, Well-Lighted Work Area Away From
Children and Visitors.
NEVER Use This Machine For Non-Food Products.
NEVER Operate Machine With Tray And/Or Tray Guard Removed, or Magnetic Safety Switch
By-Passed.
ALWAYS Turn Off, Unplug From Power Source and Perform Lockout/Tagout Procedure to This
Machine BEFORE Attempting to Unjam or Unclog, Cleaning or Servicing.
NEVER Leave Machine Unattended While Operating.
NEVER Alter This Machine From its Original Form as Shipped From Factory. DO NOT Operate
Machine With Parts Missing.
PROMPTLY REPLACE Any Worn or Illegible Warning Labels.
USE ONLY BIRO Parts and Accessories Properly Installed.
2

INSTALLATION
TO AVOID SERIOUS PERSONAL INJURY
PROPERLY INSTALL EQUIPMENT IN ADEQUATE WORK AREA
ALWAYS Use Qualified Technician and Electrician for Installation.
ALWAYS Connect to Proper Voltage & Phase.
ALWAYS Install Equipment in Work Area with Adequate Light and Space Away From Children
and Visitors.
ONLY Operate on a Solid, Level, Non-Skid Surface.
NEVER Bypass, Alter, or Modify This Equipment in Any Way From Its Original Condition.
NEVER Operate With Tray And/Or Tray Guard Removed, or Magnetic Safety Switch By-Passed.
NEVER Operate Without all Warning Labels Attached and Owner/Operator Manual Available to
the Operator.
UNCRATING AND SET UP
1. Read this Manual thoroughly before installation and operation. Do not proceed with installation and operation if
you have any questions or do not understand anything in this Manual. Contact your local Distributor, or BIRO
first.
2. Install machine on a level, solid, non-skid surface in a well-lighted work area away from children and visitors.
3. After installing machine in operational area, it is imperative that the four adjusting legs be adjusted to level the
machine and also eliminate rocking.
4. This machine is complete except for a knife and plate. There is a bowl shipping plug (stamped steel) placed in
the output end of the grinding bowl to retain the grinding worm during shipment. REMOVE THE BOWL
SHIPPING PLUG AND THE GRINDING WORM.
5. After checking and making sure the power supply is correct, plug in your machine. NEVER OPERATE
MACHINE WITHOUT TRAY AND GUARD INSTALLED (Machine will not run with tray removed).
6. Machine must be properly grounded. Use qualified electrician to install according to building codes.
MOTOR WIRING AND ELECTRICAL REQUIREMENTS
(A) Interchange of current is made in motor outlet box. Leads are properly marked. Changing instructions are
on the motor plate or motor outlet box.
(B) All grinders are wired 220 volts unless otherwise specified. Be sure motor specifications (voltage, cycle,
phase) match power supply line. Be sure line voltage is up to specification.
(C) Electrical connections to be accordance with safety codes and National Electrical Code.
3
ALWAYS LEVEL MACHINE BEFORE USING

(D) Rated voltage of the unit shall be identical with full supply voltage.
(E) Voltage drop on the supply line shall not exceed 10% of full supply voltage.
(F) The feederline conductor size in the raceway from the branch circuit to the unit must be correct to assure
adequate voltage under heavy starting and short overload conditions.
(G) The feederline conductor shall only be used for the supply of one unit of the relevant horsepower. For
connections of more than one unit on the same feederline, a local electrician will have to be consulted to
determine the proper conductor size.
(H) The size of the electrical wiring required from the power source to the grinder on the 3, 5, 712HP Grinders is
aMINIMUM OF No. 10 WIRE. On the 10 & 15 HP Grinders a MINIMUM OF No. 8 and No. 6 respectively.
(I) The BIRO Manufacturing Company is not responsible for permanent wiring, connection or installation.
MOTOR SPECIFICATIONS
HP KW VOLTS HZ PH AMPS
5 4 208/220 60 3 17/16
5 4 230 60 1 27
5 4 440 60 3 8
5 4 550 60 3 6.4
7.5 5.5 208/220 60 3 23/22
7.5 5.5 440 60 3 11
10 7.5 208/220 60 3 27/25.6
10 7.5 440 60 3 12.8
10 7.5 550 60 3 10
15 11 208/220 60 3 41/39
15 11 440 60 3 19.5
7. Located on the side of the machine is a toggle handle that activates the internal on/off switch. The interlock
safety switch is mounted to the top of the internal switch and will break contact with the magnetic starter should
the tray be removed.
8. Turn the toggle handle to the “ON” position. CHECK THE ROTATION OF THE WORM DRIVE SHAFT;
ROTATION MUST BE COUNTER-CLOCKWISE as indicated by the rotation decal affixed to the grinding bowl.
ROTATION MUST ONLY BE CHECKED WITH THE GRINDING WORM REMOVED, otherwise serious
irreparable damage may occur to grinding components.
9. If machine runs clockwise (backwards), it must be rewired to correct rotation, otherwise serious irreparable
damage may occur to grinding components.
10. Insert worm assembly into grinding bowl, place knife (sharp edges out) onto the square end of the worm
assembly. The breaker plate slides over the worm knife drive pin, and is held from rotating by pins in the grinding
bowl. Put on the retaining ring.
ONLY HAND TIGHTEN RETAINING RING
For best results, use knife and plate as a set. Do not operate machine for any period of time without product
in the grinding bowl. This will cause heating and dulling of the knife and plate.
11. Check placement of all warning labels and Manual. Machine is now ready for trained operators to process
product.
12. Use meat deflector attached to tray to eliminate meat splatter.
13. Contact your local Distributor or BIRO directly if you have any questions or problems with the installation or
operation of this machine.
4
NOTE TO OWNER AND ELECTRICIAN: IF THIS MACHINE IS NOT CORD
AND PLUG CONNECTED TO THE ELECTRICAL SUPPLY SOURCE, THEN IT
SHOULD BE EQUIPPED WITH, OR CONNECTED TO, A LOCKABLE,
MANUALLY-OPERATED DISCONNECT SWITCH (OSHA 1010.147).

5
WIRING DIAGRAM FOR HEAVY HORSEPOWER MANUAL FEED GRINDERS
EQUIPPED WITH AEG OR STROMBERG STARTER (3, 5, 712HP ONLY)
STARTING WITH SERIAL NUMBER 24808
WIRING DIAGRAM FOR HEAVY HORSEPOWER MANUAL FEED GRINDERS
EQUIPPED WITH AEG OR STROMBERG STARTER (10,15 HP ONLY)

OPERATION
ROTATING GRINDING WORM
TO AVOID SERIOUS PERSONAL INJURY
ONLY Properly Trained Personnel Should Use This Equipment.
NEVER Place Hands Into Machine Input or Output Openings.
NEVER Open Machine During Operation.
DO NOT Wear Gloves While Operating.
DO NOT Tamper With, Bypass, Alter, or Modify This Equipment in Any Way From Its Original
Condition.
NEVER Operate Machine With Tray And/Or Guard Removed, or Magnetic Safety Switch
By-Passed.
ALWAYS Turn Off, Unplug From Power Source and Perform Lockout/Tagout Procedure to This
Machine Before Unjamming, Unclogging, Cleaning or Servicing.
NEVER Leave Unattended While Operating.
NEVER Operate Without All Warning Labels Attached and Owner/Operator Manual Available to
the Operator.
A. TO PROCESS PRODUCT
1. Before starting grinder, have meat stomper within easy reach and method of receiving ground product
located at output end of grinding bowl.
2. Turn toggle to “ON” position. Look down grinder bowl and make certain grinding worm is turning in the
proper direction (counter-clockwise).
3. Carefully push unground product to top opening of grinding bowl and let drop to grinding worm. Product will
then be ground out.
DO NOT REACH DOWN BOWL OPENING
4. Use meat stomper to assist any product that should “bridge up” in grinding bowl opening.
5. When finished grinding turn toggle handle to “OFF” position and unplug grinder from power source and
perform lockout/tagout procedure.
6
DO’S
• Always keep knife & plate as matched set.
• Always keep the knife & plate sharp.
• Always check for levelness by laying the knife on
the plate before inserting in machine.
• Always install the knife & plate in correct sequence,
knife 1st then plate.
• Always keep knives & plates lubricated in storage and
when starting up machine.
• Always use coolant when sharpening plates.
• Always inspect the plates making sure all holes are clear-
that there are no cracks.
DON’Ts
• Never, never mix different knives to different plates.
• Never, never over tighten the bowl retaining ring on the
machine.
• Never, never run the grinder/mincer without product.
Product is a natural lubricant. Heat can build up so fast that
cold product could crack the plate.
• Never, never hit the plate against anything to clean the holes.
• Never, never throw the knives & plates.
6

MAINTENANCE
ROTATING GRINDING WORM
TO AVOID SERIOUS PERSONAL INJURY
ALWAYS Turn Off, Unplug From Power Source and Perform Lockout/Tagout Procedure to This
Machine BEFORE Servicing.
NEVER Touch This Machine Without Training and Authorization By Your Supervisor.
NEVER Place Hands Into Machine Input or Output Openings.
NEVER Bypass, Alter, or Modify This Equipment in Any Way From Its Original Condition.
PROMPTLY REPLACE Any Worn or Illegible Labels.
USE ONLY GENUINE BIRO Parts and accessories Properly Installed.
A. GRINDING BOWL INSTALLATION
1. Mount the grinding bowl on the two threaded studs on the front of the machine. Tighten in position with
provided nuts.
2. Place the grinding worm in the grinding bowl and fully seat rear drive tang into worm drive shaft.
3. Install knife, breaker plate and end retaining ring.
ONLY HAND TIGHTEN RETAINING RING
4. When the bowl assembly is mounted and tight, there should be approximately 18" gap between the back
inside wall of the bowl and the back of the worm (SEE FIGURE 1). The bowl ring wrench which is provided
with each grinder is used only for REMOVAL of the end retaining ring for cleaning purposes or for changing
knife and breaker plate.
5. To check wear: With bowl assembly removed, place a straight edge across outside flange of aluminum
bearing housing. The end of the worm drive shaft should just contact the straight edge, i.e. flange face and
worm drive shaft end should be in the same plane (SEE FIGURE 2).
8