Broce Broom 350 Series User manual

1
350 SERIES MODEL
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[phone]
Broce Manufacturing 1460 S. 2nd Street | Dodge City, KS 67801
350 SERIES
OPERATIONS
MANUAL
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2
350 SERIES MODEL
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Broce Manufacturing 1460 S. 2nd Street | Dodge City, KS 67801
WARRANTY REGISTRATION
Purchased from (Dealership)
Company:
Address:
City:
Deliver Date to Dealer:
Model Number:
Company:
Address:
City:
Delivery Date to Owner:
Purchaser
Purchaser - Type of Business
Construction/Highway
Equipment Dealer
Rental
Municipality
Asphalt Contractor
Other
1. The Purchaser has been instructed and/or has read the manual and understands proper pre-
ventive maintenance, operation and safety precautions.
2. The Warranty and Limitations of Liability are found in the Warranty pages enclosed in the Parts
and Operators Manuals.
3. Broce Manufacturing Co. Inc., reserves the right to make design changes or modications to
Waldon products at any time without incurring any obligation to make similar changes of
modications to previously sold units.
4. If this Document is not signed and returned to Broce Manufacturing Co. Inc., the warranty
begins at the date of delivery to the Dealership.
I hereby acknowledge acceptance of above and conditions in the Warranty Policy.
Purchaser/Owner:
Dealer Representative:
Unit Hours:
Serial Number:
State: Zip:
State: Zip:
Unit Hours:
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3
350 SERIES MODEL
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Broce Manufacturing 1460 S. 2nd Street | Dodge City, KS 67801
LIMITED TWELVE (12) MONTH WARRANTY
For a period of twelve (12) months or 1,000 hours whichever comes rst, from the date of delivery
of product to the original user, Broce Manufacturing of Dodge City, Kansas warrants each product
to be free from manufacturing defects, subject to the limitations contained in this policy. This limited
warranty covers parts and labor.
This warranty does not apply to defect caused, in whole or in part, by unreasonable use while in the
possession of the user, including, but not limited to, failure to properly set up product, failure to pro-
vide reasonable and necessary maintenance, normal wear, routine tune ups of adjustments, improp-
er handling, accidents, operation at speed of load conditions contrary to published specications,
improper of insufcient lubrication, or improper storage. This warranty is not a guarantee that the
performance of each product will meet the expectations of the purchaser.
Broce Manufacturing shall not be liable for consequential damage of any kind, including, but not
limited to: consequential labor costs or transportation charges in connection with the replacement
or repair of defective parts, lost time or expense which may have accrued because of said defects. In
no event shall Broce Manufacturing’s total liability hereunder exceed the product purchase price.
Many components used by Broce Manufacturing are subject to the warranties of their respective
manufacturers. These warranties will be considered void if the product is modied or repaired in
any way not expressly authorized, or if closed components are disassembled prior to return. Closed
components include, but are not limited to gearboxes, hydraulic pumps, motors, cylinders and
actuators.
Our obligation under the warranty is expressly limited, at our option, to the replacement or repair at
Broce Manufacturing of Dodge City, KS or at a service facility designated by us. We are not respon-
sible for unauthorized repairs or replacements. Any implied or statutory warranties, including any
warranty of merchantability or tness for a particular purpose, are expressly limited to duration of
this written warranty. We make no other express warranty. This warranty cannot be extended, broad-
ened, or changed except in writing by an authorized ofcer of Broce Manufacturing.
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4
350 SERIES MODEL
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Broce Manufacturing 1460 S. 2nd Street | Dodge City, KS 67801
NOTICE: THIS VEHICLE DOES NOT CONFORM TO ALL SAFETY AND EMISSIONS STANDARDS
APPLICABLE TO ON-ROAD VEHICLES IN THE UNITED STATES.
OPERATOR QUALIFICATIONS
Operation of this equipment shall be limited to competent and experienced persons. In
addition, anyone who will operate or work around this equipment must use good common
sense. In order to be qualied, he or she must also know and meet all other requirements,
such as:
1. Some regulations specify that no one under the age of 16 may operate power machinery. It is
your responsibility to know what these regulations are in your area or situation.
2. Current OSHA regulations state in part: “At the time of initial assignment and at least annual-
ly thereafter the employer shall instruct EVERY employee in the safe operation of servicing of all
equipment with which the employee is or will be involved.”
3. Unqualied persons are to STAY OUT of the work area.
4. A person who has not read and understood all operating and safety instructions is not qualied
to operate the machinery.
FAILURE TO READ THIS MANUAL AND ITS SAFETY INSTRUCTIONS IS A MISUSE OF THE
EQUIPMENT AND WILL VOID FACTORY WARRANTY.
SIGN OFF SHEET
As a requirement of OSHA, it is necessary for the employer to train the employee in the safe opera-
tion and safety procedures with this equipment. We include this sign off sheet for your convenience
and personal recordkeeping.
Date Employer’s Signature Employee’s Signature
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5
350 SERIES MODEL
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Broce Manufacturing 1460 S. 2nd Street | Dodge City, KS 67801
TABLE OF CONTENTS
DESCRIPTION
SAFETY PRECAUTIONS
MACHINE SPECIFICATIONS
Engine
Hydraulic
Fluid Capacities
MACHINE OPERATION
Controls
Daily Inspection
Startup Procedure
Sweeping Core
Towing
HYDRAULIC SYSTEM DETAILS
Hydrostatic Drive
Loop Flushing Circuit
Steering Circuit
Brush Control
System Description
Test Procedures
MAINTENANCE & SERVICE
Air Cleaner
Hydraulic System
Radiator & Heat Exchanger
Lubrication
Brakes
Core Drive
Engine
Tires
Storage
Air Conditioning Maintenance
Broom Wafer Replacement
SCHEMATICS
Wiring Diagrams
Hydraulics Diagrams
PAGE #
6
8
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26
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56
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6
350 SERIES MODEL
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Broce Manufacturing 1460 S. 2nd Street | Dodge City, KS 67801
SAFETY PRECAUTIONS
CAUTION
1. Keep all shields in place.
2. Stop machine, turn off engine and remove key to repair or clean.
3. Keep hands, feet, and clothing away from power driven parts.
4. Keep off of machinery unless a platform is provided. Do not crawl on equipment.
5. When equipment becomes disabled, shut off power before attempting repairs.
6. Check for hydraulic leaks with a piece of paper and not your hands. Hydraulic oil under pres-
sure can cause serious injury!
BE A SAFE OPERATOR BY THINKING BEFORE ACTING AND
BY READING YOUR OPERATORS MANUAL.
AVOID ACCIDENTS
Most accidents, whether they occur in industry, on the farm, at home, or on the highway,
are caused by the failure of some individual to follow simple and fundamental safety
rules or precautions. For this reason, most accidents can be prevented by recognizing the
real cause and doing something about it before the accident occurs.
Regardless of the care used in the design and construction of any type of equipement,
there are many conditions that cannot be completely safe guarded against without
interfering with resonable accessibility and efcient operation.
A careful operator is the best insurance against an accident.
The complete observance of one simple rule would prevent many thousand serious injuries each
year.
Never attempt to clean, oil, or adjust a machine while it is in motion!
BEFORE OPERATING THIS MACHINE
Read this manual completely. It contains information on safety and maintenance procedures which
must be followed to insure years of trouble free service.
WARNING STATEMENTS
READ AND UNDERSTAND THE FOLLOWING WARNING LABELS BEFORE
OPERATING THIS MACHINE
WARNING
OPERATOR MUST BE SEATED WITH SAFETY BELT ADJUSTED PROPERLY & SECURE WHEN
ENGINE IS RUNNING.
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7
350 SERIES MODEL
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Broce Manufacturing 1460 S. 2nd Street | Dodge City, KS 67801
The seat belt and roll over protection structure were designed to be used together to prevent op-
erator injury in the event of an accident. The seat belt must be worn at all times in order to hold the
operator in place so that the roll bar can protect the operator. Adjust the slack out of the seat belt by
pulling the unused portion of the belt to the left. The belt should t snug over the operator’s hips.
WARNING
TRAVEL SPEED MUST BE GOVERNED BY GOOD JUDGMENT. DO NOT OVERSPEED!
Although a high travel speed is available with the Broce Broom, we caution all operators to use good
judgment, especially on rough terrain.
WARNING
DO NOT OPERATE CORE UNLESS CHAIN GUARD IS INSTALLED.
On Chain Drive cores, the chain guard must be installed and be in serviceable condition at all times
when the broom is operating. This guard is designed to prevent personal injury and to protect the
chain from foreign debris.
SAFETY PRECAUTIONS
WARNING
The operator must be aware at all times of any people, vehicles, or any other objects which
might be in the path of ying debris from the sweeper. The sweeper can throw small rocks and
other objects several feet. This debris can cause serious injury to people and damage to prop-
erty. Always check that the area around, and in front of the broom core is free of obstructions
before adjusting the broom angle or activating the core.
WARNING - NO RIDERS!
UNDER NO CIRCUMSTANCES SHOULD PASSENGERS BE ALLOWED TO RIDE ON THIS MA-
CHINE. THERE ARE NO SAFETY PROVISIONS ON THIS MACHINE FOR PASSENGERS. FAIL-
URE TO HEED THIS WARNING COULD RESULT IN SERIOUS INJURY OR DEATH.
WARNING
When operating a broom without an enclosed cab, wear hearing and eye protection as well as
a dust mask that covers both the mouth and eyes.
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8
350 SERIES MODEL
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[phone]
Broce Manufacturing 1460 S. 2nd Street | Dodge City, KS 67801
MACHINE SPECIFICATIONS
Displacement at MAX Angle
Rated Speed
MAX Speed
MIN Speed
Case Pressure - Continuous
Case Pressure - MAX
System Pressure - Continous
System Pressure - MAX
Inlet Vacuum - Continous
Inlet Vacuum - MAX
Charge Pressure Setting
System Pressure Setting
Approximate ow at 2400 RPM
46 cc (2.8 CU IN)
4000 RPM
4100 RPM
500 RPM
1.7 BAR (25 PSI)
5.2 BAR (75 PSI)
210 BAR (3000 PSI)
345 BAR (5000 PSI)
8 BAR (5 IN Hg)
7 BAR (10 IN Hg)
19.5 BAR (283 PSI
280 BAR (4060 PSI)
26 GPM
Engine Specications
See Engine Manufacturer’s Manual (included) for engine specications.
Hydraulic System Specications
PROPEL PUMP
PROPEL MOTOR
Displacement
Rated Speed
MAX Speed
Case Pressure - Continous
Case Pressure - MAX
System Pressure - Continuous
System Pressure - MAX
46 cc (2.8 CU IN)
3600 RPM
3600 RPM
1.7 BAR (25 PSI)
5.2 BAR (75 PSI)
210 BAR (3000 PSI)
345 BAR (5000 PSI)
AUXILIARY PUMP
Displacement
MAX Speed
MAX Continuous Pressure
Approximate ow at 2400 RPM
Priority (Steering and Broom)
Secondary (Broom Rotation)
MAX Pressure Setting (Priority)
MAX Pressure Setting *(Secondary)
46 cc (2.8 CU IN)
3600 RPM
3600 RPM
1.7 BAR (25 PSI)
5.2 BAR (75 PSI)
210 BAR (3000 PSI)
345 BAR (5000 PSI)
*Relief valve in the broom rotation valve.
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9
350 SERIES MODEL
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[phone]
Broce Manufacturing 1460 S. 2nd Street | Dodge City, KS 67801
MACHINE SPECIFICATIONS
FLUID CAPACITIES
Component
Hydraulic Tank
Fuel
Radiator
Engine Crankcase
Rear Axle
2-Speed Gear Box
Fluid Type
DYNA-PLEX 21C Cursa Hydraulic Oil
Multifunctional Medium
#2 Diesel
ETHYLENE GLYCOL 50/50 MIX
API Classication CI-4, CE or CD CCMC
Specication D4 or D5
85/140 Gear Lube
85/140 Gear Lube
Quantity
27 Gal.
27 Gal
2.5 Gla
10 Qts.
2 Qts.*
2 Qts.*
* 2 Quarts is approximate. Fill to the level of the ller plug.
ATTENTION
R-134a A/C Refrigerant
Factory Charge:
Kubota = 3.0 lb 2.0 oz (1.417 kg)
John Deere = 3.0 lb 2.0 oz (1.417 kg)
Caterpillar = 2.0 lb 12.0 oz (1.247 kg)
Cummins = 2.0 lb 10.0 oz (1.191 kg)
Ester Oil Charge:
Compressor = 8.0 oz
System = 4.0 oz
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10
350 SERIES MODEL
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[phone]
Broce Manufacturing 1460 S. 2nd Street | Dodge City, KS 67801
MACHINE OPERATION
The Broce Broom is hydrostatically driven. The directional control is achieved through the use of a
control pedal, located near the operator’s foot. Toe down on the pedal directs the machine forward.
Heel down shifts the travel to reverse. Rate of travel is governed by the distance the pedal is de-
pressed and the throttle position. The pedal will return to neutral when the pressure is released.
Familiarize yourself with the following controls before operating this machine.
1. Brake pedal
2. Directional Control
3. Broom on/off
4. Locking throttle
5. Parking brake (lower left side of seat)
6. Ignition switch
7. Two speed shifter
8. Broom Control Joystick
9. Broom Core Lock Switch
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11
350 SERIES MODEL
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Broce Manufacturing 1460 S. 2nd Street | Dodge City, KS 67801
MACHINE OPERATION
DAILY INSPECTION
Prior to initial startup of the machine each day, the following inspection checks must be performed:
1. Visually inspect the entire machine for damage and uid leaks. Repair critical items before ma-
chine is used.
2. Check all uid levels; engine oil, radiator, and hydraulic reservoir, etc. Fill uid reservoirs if nec-
essary.
3. Check wheels and tires for excessive wear or damage; also check air pressure and lug nut tight-
ness.
4. Check pre-cleaner bowl and air cleaner service indicator and service if indicated.
5. Chain guard, seat belt, core cover, and rubber rock guard should be installed and serviceable.
6. Lights, windshield wipers, reverse alarm, etc., must be in operating condition.
7. Test brakes before operating this machine. Refer to BRAKES area in the MAINTENANCE Sec-
tion in this manual for details.
8. Check water system lters, nozzles screens and cycle system.
Any defects or damage found during this inspection must be repaired before operating this machine.
CAUTION
1. Before starting the engine, be sure the parking brake is set (pull handle up to vertical
position). The brake pedal should be depressed and the right foot is not on the control ped-
al.
2. Turn the key switch to the starting position (all the way to the right). Add fuel as neces-
sary using the hand operated locking throttle near the operator’s right hand. Release the key
switch when the engine starts.
MACHINE STARTUP
IMPORTANT
Do not exceed 1500 RPM until the hydraulic uid has warmed up.
3. Choose the desired gear using the two-speed shifter located on the right-hand side of the
dashboard. Low gear is normally used while sweeping in order to maintain sufcient RPM, to run
the hydraulics. Leave the two-speed in Low gear until the operator is familiar with the machine.
High gear is used for travel only. Optimal sweeping is normally achieved at manufacturer’s recom-
mended engine speed of 1800-2000 rpm in Low gear with forward travel speed of 2 ½ - 5 mph.
4. After gear selection, raise engine RPM to about half throttle. Release parking brake. Slowly
depress control pedal in the desired direction. Engine speed may be adjusted to obtain desired
travel speed.
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12
350 SERIES MODEL
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[phone]
Broce Manufacturing 1460 S. 2nd Street | Dodge City, KS 67801
MACHINE OPERATION
5. Do not over speed! Although a high rate of travel is available with the Broce Broom, we cau-
tion all operators to use good judgment, especially on rough terrain.
6. If the control pedal is released while traveling, the machine will slow down rapidly. This is
called “Dynamic Braking”. Using Dynamic Braking at low speeds is ne as long as the operator is
ready to use the brake pedal if needed.
7. Do not reverse the direction of travel while the broom is in motion. This could damage the
drive train and cause brush distortion and imbalance.
8. The core should be in the raised position and the core switch in the “LOCK” position before
stopping the engine. This prevents the core from drifting down to the ground and creating a “at
spot” in the brushes while the machine is parked. These at spots can cause the broom to bounce
or hop while sweeping.
9. To stop the engine, turn the key back to the center position. The parking brake must be set
prior to leaving the operator’s seat.
IMPORTANT
Do not propel this machine with the parking brake engaged. This will damage the rear brake
assemblies.
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13
350 SERIES MODEL
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Broce Manufacturing 1460 S. 2nd Street | Dodge City, KS 67801
MACHINE OPERATION
SWEEPING CORE OPERATION
RAISE / LOWER / FLOAT DETENT
To raise the sweeping core, place the broom core lock switch
on the dash in the “SWEEP” position and pull the joystick to the
“RAISE” position until the core is raised all the way. The joystick will
return to the center position and core height will be maintained.
To lower the core during normal sweeping conditions, push the
joystick to the “FLOAT” position. The “FLOAT” position will allow
the core to maintain the ideal contact with the surface to be swept
while allowing it to oat over bumps or contours. This valve is
equipped with a feature called “POSITIVE DOWN PRESSURE”. It
should only be used under the heaviest sweeping conditions. The
down pressure adjustment range is between the center position
and the oat detent position. To adjust the core height downward,
slowly move the handle from the toward the oat position. The
core will begin to move downward. Release the handle when the
desired height has been achieved. The gure shows the optimum
broom height for most sweeping conditions. Using the proper
height will also extend the life of the broom.
IMPORTANT
The operator must maintain continuous adjustment on the core while the down pressure op-
tion is being used. This feature does not allow the core to oat over contours in the surface to
be swept. Therefore, the operator must constantly make these adjustments. Overuse of the
positive down pressure feature will cause excessive wear and shorten the life of the broom.
We recommend using the oat detent feature during all but the heaviest sweeping conditions.
RIGHT/LEFT OPERATION OF BROOM
The broom core may be set at any angle from 44° left to 45° right, simply moving the handle in the
corresponding direction. Release the handle when the desired angle is achieved.
BROOM ON/OFF
The Broom Core motor is activated when the handle is moved to the “BROOM ON”
position.
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14
350 SERIES MODEL
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Broce Manufacturing 1460 S. 2nd Street | Dodge City, KS 67801
MACHINE OPERATION
SWEEPING TIPS
Optimal sweeping is normally achieved at manufacturer’s recommended engine speed of 1800-
2000 rpm in Low gear with forward travel of 2 ½ - 5 mph.
1. If the broom starts to “hop” or “bounce”, the propelling speed is too high, reduce the forward
travel speed, but maintain high engine speed. Slowing the forward travel speed of the machine
down will help prevent you from having to make a second pass over the sweeping area with the
broom.
2. In areas where the dirt is “caked”, try to clean it by going over it a second or third time. If this
doesn’t clear the dirt, use the “Positive Down Pressure” feature. In most cases, the “Float” posi-
tion will yield the best results.
3. When changing the direction of travel, allow the machine to come to a complete stop before
moving the directional control pedal. Failure to completely stop the machine before changing
direction can cause premature failure of the drive components.
4. If the dust cloud becomes so thick that it obscures your vision, use the water sprinkling system
if installed, or stop the machine until the dust clears. If possible, angle the sweeper so that the
dust and debris is swept downwind.
5. Ensure that the operator of the machine is properly trained and follows all safety procedures
described in this manual.
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15
350 SERIES MODEL
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Broce Manufacturing 1460 S. 2nd Street | Dodge City, KS 67801
MACHINE OPERATION
TOWING
The Broce Broom may be towed without removing the
drive shaft, but it is critical to ensure that the gearbox is
in neutral to prevent serious damage. Use caution while
towing since the broom does not have a suspension
system to absorb the bumps.
1. Ensure gearbox lever on dash is in Neutral posi-
tion. Start engine, shift to Neutral and carefully move
control pedal forward and back slightly to ensure
Neutral position.
2. Release Parking Brake.
3. Raise and Lock broom core.
4. Secure tow bar to towing vehicle and connect
safety chains and lights.
5. Turn steering cylinder valve (under front bumper)
to OPEN position to allow front wheels turn freely
while towing.
6. If tow bar is equipped with SURGE BRAKE:
a. Turn valve on tow bar to OPEN.
b. Turn valve on master cylinder (under front, left
oorboard of broom) to CLOSED position.
DO NOT EXCEED 45 MPH WHILE TOWING.
DO NOT TOW WITH WATER IN THE SPRAY TANK.
RESET THE VALVES FOR BROOM OPERATION.
Open valve for towing (valve closed in photo)
Surge brake only - open valve for towing (valve
closed in photo)
Surge brake only - close valve for towing (valve
open in photo)
Valve Open
Valve Closed
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16
350 SERIES MODEL
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HYDRAULIC SYSTEM DETAILS
The Hydraulic System on this machine operates the hydrostatic drive, loop ushing circuit, steering
circuit, brush functions, and brush rotation. It employs two supply pumps sharing the same reservoir.
In order to simplify the description of this system, it will be separated into ve parts.
Hydrostatic Drive:
The basic hydrostatic drive system has evolved over the years, beginning with Sundstrand then to
Eaton and now current production machines are equipped with Sauer- Danfoss drives. A current
schematic and trouble-shooting guide are included in this manual.
This system utilizes a Sauer-Danfoss variable displacement piston pump and a xed displacement
piston motor. Oil, supplied from the reservoir, passes through a 10-micron lter with a bypass setting
of 3 psi, before entering the pump. Pressurized oil from the pump is delivered to the motor by high
pressure hoses.
Machines with serial number 90188 and higher are equipped with a Sauer-Danfoss hydrostatic drive
system.
Eaton and Sauer-Danfoss components are available from the factory, including the latest revisions
and recommend that customer repaired units be upgraded.
Loop Flushing Circuit:
The xed displacement motor is equipped with a loop ushing valve that purges hot oil and/or
contaminated oil from the closed loop. This oil is routed back to the pump and joined with the case
drain oil, then through the heat exchanger and returned to the tank.
If a problem develops with the pump or motor, we strongly recommend that they be taken to an
authorized Sauer-Danfoss repair center or returned to Broce Manufacturing Co., Inc. for exchange of
new or rebuilt components or repair authorization.
Steering Circuit:
Oil from the reservoir supplied to the work pump is pulled through a 100 mesh replaceable screen.
The pump has a built-in ow divider, which delivers priority oil to the steering circuit and the exhaust
ow to the brush circuit. The priority ow is 3 gpm and the relief valve in the ow divider is set at
1600 psi. The steering unit is an orbital type metering valve that supplies oil to the steering cylinder
and also has power beyond capabilities that are used to control the brush functions.
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17
350 SERIES MODEL
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HYDRAULIC SYSTEM DETAILS
Brush Functions:
Forward movement of the joystick lever will lower the core. Pushing
the lever all the way forward until it locks, puts the core in the preferred
“oat” mode.
Pulling the lever back will raise the core. Movement to the right will ro-
tate the core to the right, and movement to the left will rotate the core
to the left.
The return oil from the steering unit and the brush function valve ow
to the return manifold in separate hoses. The return manifold is mount-
ed directly on a 10- micron lter with a bypass setting of 25 psi., then
the ltered oil ows back to the tank.
Brush Rotation:
The exhaust ow from the work pump supplies oil to the rotation valve at a rate of 12-23 gpm, de-
pending upon engine speed. The relief valve is enclosed in the rotation valve and the relief setting
is 2650 psi at 21 gpm. The brush control lever is located aft of the joystick. Moving the lever forward
will turn on the brush. Pull the lever back to stop brush rotation. Oil ows from a-port on the rota-
tion valve to upper port on the core motor to receive counterclockwise rotation, b-port is plugged.
The hose on the lower port of the motor returns the oil to the return manifold, lters it, and returns it
to the tank. On units equipped with dual rotation, b-port on rotation valve sends oil to the lower port
on the motor for clockwise rotation. The spool valve requires a change of the kit mounted on the
rear of the valve to achieve dual rotation. In either case, return oil from the rotation valve ows from
the outlet port on the valve to the return manifold, is ltered, and returned to the tank.
There are two types of core motors used for broom rotation, the internal drive type that is standard,
and has a replaceable splined hub mounted in the core frame, the other is the external chain drive.
On machines equipped with an external drive, a-port on the rotation valve ows to the front port on
the core drive motor, the rear port ows back to the return manifold, is ltered, and returned to the
tank. B-port on the rotation valve is plugged.
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18
350 SERIES MODEL
For parts and service, call:
[phone]
Broce Manufacturing 1460 S. 2nd Street | Dodge City, KS 67801
HYDRAULIC SYSTEM DETAILS
SYSTEM DESCRIPTION
PUMP: The hydraulic system operates on a 2.32 cubic inch gear pump that is mounted on the rear of
the hydrostatic pump. This pump produces approximately 26 gpm @ 2600 RPM, with a built-in ow
divider that provides the priority ow to steering at 3 gpm.
The exhaust ow of approximately 23 gpm powers the brush rotation valve.
STEERING UNIT: The steering unit is an open center type motor that has power beyond and dead
steering capabilities. The power beyond capability is used to power the brush functions and dozer
blade control valve if equipped.
STEERING CYLINDER: 2” X 10” double acting cylinder
BRUSH FUNCTION VALVE: The brush function valve is a two-spool mono block design that receives
its oil supply from the steering unit power beyond port.
LIFT CYLINDER: 2” X 8” double acting cylinder
SHIFT CYLINDER: 2” X 16” double acting cylinder
BRUSH ROTATION VALVE: The brush control valve is a single spool, two-position, mono block de-
sign valve.
CORE MOTORS: There are two types of motors used on Broce Brooms. The rst, a magneto style
mount with a keyed shaft used on chain drive units. The second, SAE styles mount with a splined
shaft used on the internal drive cores.
RETURN FILTERS: The return lter is a 10-micron, spin-on type, with a 25 psi bypass attached to
the return manifold. The manifold is ported to accept return lines from the steering unit, the brush
function valve, the dozer control valve, the curb sweeper control valve, the broom rotation valve, and
return line from the core motor.
SHUT-OFF VALVES: The ball valve mounted below the hydraulic tank closes the suction line to the
work pump. There are two valves mounted on the rear of the tank, the right one closes off the suc-
tion line to the hydrostatic pump, and the left one closes off the return lines.
CAUTION
Make sure all three valves are in the “OPEN” position before starting the engine. If the return
valve is closed, the return lter housing will be destroyed.
Go to Discount-Equipment.com for parts

19
350 SERIES MODEL
For parts and service, call:
[phone]
Broce Manufacturing 1460 S. 2nd Street | Dodge City, KS 67801
HYDRAULIC SYSTEM DETAILS
RESERVOIR: The hydraulic reservoir has a 27 US gallon capacity, with an inlet strainer (100 mesh),
lockable cap, sight level indicator with thermometer, suction screen in the bottom outlet (100 mesh),
and shut-off ball valves.
HOSES AND ADAPTERS: Starting with Serial Number 90188, all hose adapters are boss O-ring/
at face in the cylinders, valves, steering unit, pumps, and motors. The tank outlets remain piped
through the shut-off valves, then change to at-face type adapters. All the hoses are at-face type
design.
References are made in the parts manual sections to hydraulic hoses and adapters. These references
are for informational purposes only. Broce Manufacturing does not normally sell hydraulic hoses or
adapters through the parts department. Please source these parts locally.
SYSTEM PLUMBING: The system plumbing diagrams can be found in the Hydraulic Section of the
parts manual.
NOTE: All standard machines are equipped with the positive down pressure feature. If you would
like to defeat this feature, use the following procedure.
1. Disconnect the lower hose on the core lift cylinder and allow the oil to drain, then reconnect it.
2. Disconnect the hose from A-port on spool #1 on the two-spool valve and connect a breather in
the end of the hose.
3. Remove the hose adapter from the spool valve and install a –6 Boss O-ring plug.
4. Secure the loose hose to the other hoses with a wire tie.
Note: Spool #1 is the spool closest to valve inlet. A-port is the closest port to the control handle.
Eliminating the positive down pressure feature will have no other effect on the rest of the operating
capabilities of the system.
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