Model DA-3

Unibelt Patcher – Specifications

Model DA-3

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These specifications describe a self-contained patch unit, which is permanently mounted to a truck chassis to be used for patching with hot asphalt.


Unit shall be 3 cubic yards

Double wall constructed

2” – 6 lb. density insulation throughout

3/16 GA HR steel interior sides, 10 GA HR steel exterior

Top loading lids have expansion corrugations

Top loading doors are 2” double wall constructed

Single hinged top lids open into a V with inside surface acting as a funnel

Flame cut upper pivot arms for top lids

All doors hydraulically operate by 2” x 11” stroke cylinders

Material funneled to center of container

Hydraulic system shall operate at 1500 PSI

Hydraulic controls located at right rear corner of container

Sloping floor shall not be less than 45° from horizontal

Material shall be discharged by a dual auger conveyor system, eliminating need for anti-bridging bar

Augers shall be 10 feet in length and 6” in diameter

Auger flights shall be constructed of ¼” AR400

Shafts shall be constructed of schedule 80 pipe

Augers to be supported at each end with sealed bearings

Conveyor is driven through a gearbox by a hydraulic motor

Variable speed hydraulic motor

Forward and reverse controls

Radiant Heater:

Heat tubes located under container

Interior heat chamber has passageways to direct heat

Passageways separate from heat chamber

Chamber totally enclosed inside container

Two propane fueled casted manifold burners with flume adjustment

Rating of 67,000 BTU each @ pressure of 10 PSI

Controlled by thermostat range of 100°F – 300°F

12 volt electronic igniters

100% fuel shut off if burner is extinguished

Burner area fully enclosed and located at front of unit safely away from rear operation

Hand Torch:

Pilot with valve control

Capacity of 200,000 BTU

25 foot hose supplied

Shoveling Apron: Model 5

Constructed of 10 GA HR steel

Folding bottom for material to bypass freely

Mounted on rear of container

Emulsion Spray Unit: Model BH-153-21

Emulsified Asphalt spray and storage system mounted on truck chassis for applying tack coat.


Two compartment tank

Storage capacity 130 gallon emulsion and 20 gallon solvent

10 GA steel with bottom reinforced

6” curbside filler cap

Tank dimension 72”W x 16”L x 30”H

4” clean out on curb side near tank bottom

Tank shall be vented

Removable fill basket strainer

Y strainer at discharge of tank before material enters pump

Capable of switching from emulsion to solvent with one valve lever


Internal serpentines of 1” steel tubing to circulate water from truck engine

Truck engine cooling system as a heat source

Two 5/8” coolants hose

System will have a temperature control valve at tank with thermometer

0°F – 300°F

Auxiliary Electric Heat:

Equipped with 110 VAC heat system

Overnight heating, controlled by temperature sensor

Heating elements shall be low-density stainless steel


Space required for mounting of tank is 22”

Spraying system shall be mounted in front of dump body

Mounting shall be accomplished with 2 full length mounts

Spring bolsters on one side of tank

Bolting to frame shall consist of 3 each side, ½”

No welding on truck frames will be accepted


Rotary gear pump

Output of 10 gallons per minute of 600 R.P.M.

Pumps shall be hydraulic driven

All valves shall be high pressured

It shall be remote mounted for ease of maintenance

Mechanically actuated from right rear of body

Pump shall be reversible to draw material back to tank

Pump shall be driven by a torque motor, which has 5.9 CID

Spray Wand and Hose:

System should be plumped to curbside rear of truck

3/8” diameter 5 feet long steel application wand shall be supplied

25 feet of ½” diameter oil resistant hose

A brass changeable nozzle at spray tip

Wand storage brackets

Drip Pan:

10 gallon drip pan/waste oil combination

Mounted under patcher body

Necessary valves for draining and cleaning


Auxiliary Electric Heat Patcher:

Low density electric heat

Minimum 6KW, 240 VAC thermostatically controlled

100°F – 300°F

Weatherproof Panel

Overnight heating of asphalt

25 foot power cord

Compactor Lift Platform:

PB model 640

Constructed of 3/16” one piece formed plate with 2” lip on back and sides

1” pipe font pipe stop and two 2” channel rear stops, Reinforced with 3/16 HR angle on side corners

Cylinder 1½” x 18” stroke, two 6” x 4” tube outside supports and 4” x 4” tube inside with internal rollers, located at rear unit

Optional Bomag roller locking bracket

Roller Transport Device:

Rear mount lifting rack with two hydraulic 36” stokes cylinders. Designed to lift and carry single drum walk behind rollers

Hydraulic Tool Circuit:

25 foot dual hose

Quick couplers

Flow meter

Engine throttle control to be provided by chassis manufacturer

Relief valve

Pressure gauge

Hydraulic Tools:

Stanley BR67 Breaker

Asphalt cutter

Detachable shank with pad

35 lb., 45 lb., 72 lb., 87 lb. breaker sizes available

Tool Box:

Lockable, 18”W x 36”L x 18”H

Additional sizes and configuration available

Tool Basket:

Expanded metal with Angle iron framed mounted on left side of unit

15”W x 96”L x 8”H

Lockable Tool Basket:

Enclosed expanded metal with Angle iron framed mounted on left side of unit

Two drop down doors with lockable SS T-handle latches

Optional solid 10 GA skin available

Spoils Bin:

18” cubic yard, cross frame spoils bin or 24”, 30”, 36” wide bins

Constructed of 10 GA HR steel doors on each side to discharge material

Hydraulic Spoils Bin:

Hydraulic dumping spoils bin, ½ cubic yard 36” wide frame mounted

For easy low profile loading

Side and Rear Spoils Bin:

Two ½ cubic yard spoils bin one mounted on curb side of hopper and one mount at rear on street side with sloped floors to discharge material

Optional hydraulic raise and lower available for rear bin for easy loading

Solvent Pump:

12 VDC pump

Connected to solvent side of tank

25 foot hose with wand

Used for cleaning tools

Cab Controls:

Inside cab controls, air actuated

Operates top lids, and/or rear door, conveyor

(Subject to air availability on chassis)

Dual Controls:

Additional set of air actuated controls on left side at rear

(Subject to air availability on chassis)

Air Blow Gun:

25 feet, 3/8” hose and wand

(Subject to air availability on chassis)

Arrow Board:

(10) light board LED

Arrow – left, right, or both

Mounted at rear of unit


0°F – 300°F

Air Compressor:

Vanair Hydraulic, 40 CFM

Vanair PTO under deck 160 CFM

Air Tools:

60 lb. and 90 lb. Breakers

Asphalt cutter

Detachable shank with pad

Hose Reels:

Emulsion spray hose reel

Hand torch hose reel

Solvent hose reel

Air blow gun hose reel

Dual hose reel for hydraulic jackhammer

All reels are designed to accommodate 25 foot hoses

Air hammer hose reel, 50 foot

LPG Tank:

25 gallon upright (portable) tank or 35, and 50 gallon horizontal frame mounted tank

Horizontal tanks comes equipped with fill gauge and quick fill port

Sanding Attachment:

Equipped with broadcasting spinner

(6) formed polyurethane vanes

Spread width (4) feet to (40) feet

In cab controls

Pivotal Asphalt Chute:

Chute to be mounted at rear with 180° – 110° pivot, depending on rear mount accessories

Optional tilt adjustment available

Side Discharge Conveyor:

12″ conveyor, hydraulic driven

5 foot in length

Forward and reverse controls

Pivotal at rear

Tool Holders:

Cone holders

Asphalt lute and shovel holders

Lockable hammer holder

8 gallon water tank with hose and spigot, or 15 gallon tank with pump and hose

Safety Equipment:

Fire extinguisher 5 lbs., 10 lbs., 20 lbs.

Triangle kit

5 gallon igloo with mounting bracket

LED taillights

Backup alarm

Cross Frame Work Deck:

12” x 96” safety grip decking with ladder and hand rails

20” x 96” safety grip decking with ladder and hand rails

Custom sizes available

Compactor Plates:

Wacker WP1550AW HONDA

Mikasa MVC90L

MBW – AP2000H

Walk-Behind Rollers:

Wacker RSS800A Honda Engine


Arrow Boards, Beacon and Flashers LED:


PSE Code 3

Other brands available

Work Lights

Air Pressure Type Emulsion Spray System:

Model CS-45, 30 gallons; Model CS-65, 50 gallons; Model CS-144, 119 gallons;

Model CS-220, 205 gallons

Pump Type Emulsion Spray System Options:

Model BH-205-28, 177 gallons (Custom sizes available)

2” insulated tank

Clean out panel 10” x 14”



Conventional or tilt cab

GVW – 26,000 lbs.

Cab to Tandem – 96″minimum – 108″ minimum with spoils bin

Reinforced frame


Allison 3000 series


Electric over electric PTO switch and light switches as required for provided safety lighting