Model DA-4TM

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These specifications describe a self-contained patch unit which is permanently mounted to a trailer chassis 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 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

Hydraulic system is powered by a 25 H.P. LPG engine

Starter generator with 12 volt 50 AMP battery



Tandem Axle

Single wheel, 18,000 lb. GVW trailers with electric brakes

Axles shall have leaf springs and oil bath seals

Four 17.5” one piece steel rim with 215/ 75R 17.5 - 16 ply tires

Constructed of 3” x 6” x ¼” rectangular tubing with a 10,000 lb. landing

Gear type jack

3” I.D. adjustable height pintle hitch eye

Two 3/8” safeties chain

Connector and two integral tails, stop, and turn lights mounted on frame

Optional surge brakes


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


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


Emulsion Spray Unit: Model BH-30-6

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



Two compartment tank

Storage capacity 24 gallon emulsion and 6 gallon solvent

10 GA steel with bottom reinforced

6” curbside filler cap

4” clean out 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 rear of unit

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


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

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


Solvent Pump:

12 VDC pump

Connected to solvent side of tank

25 foot hose with wand

Used for cleaning tools


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

Dual hose reel for jackhammer

All reels are designed to accommodate 25 foot hoses


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


Pivotal Asphalt Chute:

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

Optional tilt adjustment available


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

Custom sizes available


Compactor Plates:

Wacker WP1550AW HONDA

Mikasa MVC90L

MBW - AP2000H


Walk-Behind Rollers:   




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

Model BH-153-21, 132 gallons

(Custom sizes available)

2” insulated tank

Clean out panel 10” x 14”