Model AC-4SM

Unibelt Patcher – Specifications

Model AC-4SM

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These specifications describe a self-contained patch unit which is a “slide in” unit to be used for patching with hot asphalt.


Unit shall be 4 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 doors shall be hydraulic operated by 2” x 11” stroke cylinders

Top lids are 2” double wall constructed

Rear discharge door shall be operated 2” x 11” stroke cylinders

Flame cut upper pivot arms for top lids

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

Material is funneled to center of container

Hydraulic system is powered by an 18 H.P. LPG. engine

Starter generator with 12 volt, 50 AMP battery

Hydraulic controls located at right rear corner of container

Material discharged by auger conveyor system

Auger shall be 6 inches wide by 10 feet in length

Auger shall have ¼” AR400 flights

Auger to be supported at each end with sealed bearings

Variable speed hydraulic motor

Forward and reverse controls

Unit shall have an asphalt agitator

Shaft designed to break up asphalt bridging due to vibratory compaction

Flanged bearings at each end of shaft, driven by a hydraulic motor

Unit of box is 82” O.D.

Length of box is 120” I.D. – 132” O.D.

Patcher is designed to fit into 10 foot dump body

Loading and Unloading:

Patcher shall have freestanding legs

Shall be loaded and unloaded from truck dump body without ancillary equipment

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


Hand Torch:

Pilot with valve control

Capacity of 200,000 BTU

25 foot hose supplied


Two compartment tank

Storage capacity 130 gallon emulsion and 20 gallon solvent

10 GA steel with bottom reinforced

6” curbside filler cap

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

Auxiliary Electric Heat:

Equipped with 110 VAC heat system

Overnight heating, controlled by temperature sensor

Heating elements shall be low-density stainless steel


Spraying system shall be mounted on left hand side of unit


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

Remote mounted for ease of maintenance

Mechanically actuated from right rear of unit

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

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

Solvent Pump:

12 VDC pump

Connected to solvent side of tank

25 foot hose with wand

Used for cleaning tools

(Required emulsion system)

Arrow Board:

(10) light board LED

Arrow – left, right, or both

Mounted at rear of unit


0°F – 300°F

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

LPG Tank:

25 gallon upright (portable) tank

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:

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

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

Pump Type Emulsion Spray System Options:

Model BH-45-10, 35 gallons (Custom sizes available)

2” insulated tank