HomeMy WebLinkAbout306.001c - Hurst Extrication Equipment
TRAINING AND EQUIPMENT MANUAL
RESCUE EQUIPMENT
306.001c HURST EXTRICATION EQUIPMENT
EFFECTIVE: DECEMBER 2018
Current Revision Date: 12/26/18 Next Revision Date: 12/26/23
Author’s Name/Rank: Justin Moore Captain Review Level: 1
PURPOSE
Provide members with guidelines for the safe operation of the Hurst Extrication
Equipment.
APPLICATION
This policy applies to all members while operating Hurst Extrication Equipment either
for maintenance, training, or during emergency operations.
OPERATIONAL POLICY
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OPERATIONAL GUIDELINE
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PROCESS
HURST HIGH-PRESSURE RESCUE SYSTEMS
The Hurst high-pressure rescue systems currently in use by the Fresno Fire
Department (FFD or Department) consist of gasoline-powered hydraulic high-
pressure pump units, hydraulic spreaders, cutters, combination tools, and rams.
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Streamline Coupling
The Streamline couplings (See Figure 10) used on Hurst rescue equipment is the
single-coupling, two-hose type. The single half-turn coupling connects both
pressure and return lines. It is easy to connect and disconnect even while wearing
gloves, and allows for 360-degree swivel of the tool. The tool can be connected and
disconnected under pressure; therefore, using the dump valve is unnecessary.
The streamline coupling is used with both engine and truck units; therefore, Hurst
high-pressure tools from one apparatus may be used with the power unit of another.
Figure 10 Figure 11
Star Control Valve
The star control valve (See Figure 11) used on Hurst high-pressure tools is located
at the top of the hand grip for ease of left- or right-hand operation while holding the
tool at any angle. To operate, twist the star to the right to open (out) and twist to the
left to close (in).
All Hurst control valves are equipped with a dead-man feature. When the control
valve is released, it will automatically spring back to the center position and the tool
will stop operating.
The control valves on the Hurst rescue tools have built-in check valves. The tools
will hold their position under load, even when the hoses are disconnected. Hoses
may be reconnected while the tools are under load.
Hurst Centaur Power Unit (Trucks, NCFPD)
The Hurst Centaur Mini Mate Simo compact-power unit (See Figure 12) consists of a
lightweight, 3-horsepower, 4-cycle gasoline engine and hydraulic pump capable of a
normal operating pressure of 9140 psi. Flow is directed through two independently
operated outlets, which can power both tools simultaneously.
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The power unit weighs approximately 58 pounds and is equipped with a 3.5-liter
hydraulic oil reservoir and two sets of 35-foot hydraulic hoses. Some units also have
two sets of 20-foot extension hoses. Extension hoses may not be equipped with the
streamline couplings; therefore, they must be connected to the pump first.
Figure 12 Figure 13
The control valves (See Figure 13) direct hydraulic fluid to the hose lines. The
valves are labeled “pressure” and “dump” and are of the 90-degree operational type
(up to charge the line).
The engine, fuel, and hydraulic oils should be checked weekly and after each use.
The engine uses unleaded gasoline only. Do not mix oil with the gasoline.
Hydraulic fluid may only be filled and/or topped-off by Shop personnel. Members
are directed to contact the Fire Shop if hydraulic fluid is needed.
Spreader
The Hurst spreader weighs 43 pounds and will produce up to 51,700 pounds of
spreading force and 24,700 pounds of squeezing force. The spreader is evenly
balanced at the crossbar. The maximum spread distance is 32 inches (See Figure
14).
Figure 14
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Chains
Hurst spreader chains can be used without removing the spreader tips. The U-bolt
assembly attaches to the spreader tip with a self-locking pin (See Figure 15). Simply
pull the pin and slide the entire U-bolt over the spreader arm (See Figure 16). Once
the U-bolt pin is in place over the spreader arm, insert the U-bolt pin into the hole in
the arm of the spreader until it locks into place.
Figure 15 Figure 16
Cutter
The Hurst cutter weighs 42 pounds and produces a cutting force of 152,900 pounds.
The maximum cutter opening at center is 7 inches (See Figure 17).
The cutter is capable of cutting door posts, door struts, seat backs, and brake
pedals. It should not be used to cut hardened steel, such as tie rods. It is capable
of cutting through steering columns; however, it is recommended steering columns
only be cut as a last resort.
Figure 17
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Ram
The Hurst telescoping ram weighs 46 pounds and can produce a maximum of
53,950 pounds of pushing force through the first piston, and 26,980 pounds through
piston two. The ram is 25 inches closed and extends to a maximum of 59 inches.
(See Figure 18)
Figure 18
Compact Power Unit (Engine Companies)
The Hurst compact power unit (See Figure 19) consists of a lightweight 2.5-
horsepower, 4-cycle gasoline engine, and hydraulic pump capable of a normal
operating pressure of 9140 psi and delivers a constant flow of a mineral-based
hydraulic fluid to the rescue tool through a single outlet. The unit weighs
approximately 37 pounds and has a hydraulic oil reservoir with a capacity of 2.6
liters.
Figure 19 Figure 20
The outlet has a dump valve to relieve hydraulic pressure to the tool. The valve is
labeled “1” and “0” with 1 being closed for “pressure” 0 being open for “dump” (See
Figure 20.).
The engine, fuel, and hydraulic oils should be checked weekly and after each use.
The engine uses unleaded gasoline only. Do not mix oil with the gasoline.
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Hydraulic fluid may only be filled and/or topped-off by Shop personnel. Members
are directed to contact the Fire Shop if hydraulic fluid is needed.
Combination Spreader/Cutter
The Hurst combination tool weighs 32 pounds and will produce up to 25,400 pounds
of spreading force, 10,228 pounds of pulling force, and 85,430 pounds of cutting
force. The spreader is evenly balanced at the crossbar. The maximum spread
distance is 14.1 inches (See Figure 21).
Figure 21
HURST LOW-PRESSURE HYDRAULIC RESCUE TOOLS
The Hurst hydraulic rescue tools currently in use consist of a four-cycle Hurst power
unit, multi-tool manifold block, hydraulic spreader, hydraulic cutter, and three
hydraulic rams (See Figure 22). Hurst recommends inspection to be performed daily
and after use; maintenance should be performed every six months and annually.
The maintenance guidelines will differ for each product.
Figure 22
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Power Unit (NCFPD Reserve)
The Hurst power unit consists of a hydraulic pump powered by a Honda
five-horsepower, four-cycle gasoline engine. The hydraulic pump operates at
5,000 psi maximum pressure and less than 800 psi no-load pressure. A sequencing
valve is operated by back pressure and changes the pump automatically, when
required, from one pressure range to another (See Figure 23).
Figure 23
The unit holds three quarts of fluid in the hydraulic reservoir. The unit is considered
full when the fluid is static, one inch from the top of the fill plug. Use fire resistant
Hurst hydraulic fluid. The Hurst hydraulic fluid is caustic to the skin, as well as paint,
rubber, etc. Fuel capacity is approximately one gallon of unleaded fuel and will last
between 20 and 40 minutes, depending on use. Hydraulic fluid may only be filled
and/or topped-off by Shop personnel. Members are directed to contact the Fire
Shop if hydraulic fluid is needed.
The power unit is equipped with two 30-inch hoses. Hoses are, and must remain,
pre-connected to the power unit. Opposite ends of the hoses are connected
together (male to female) to ensure dirt cannot enter and mix with the hydraulic fluid.
Always make connections (unit to tool) before starting the unit.
To begin the start procedure, confirm the fuel valve is in the “on” position and the
pressure valve is in the “dump” position. Slide the throttle control lever to the
choke/start position. Grasp the pull-start handle firmly and pull the cord until the
engine starts. When the engine starts, slide the control lever to the fast position.
Note: OPERATE TOOLS IN THE FAST POSITION ONLY.
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The power unit may be idled in the slow position any time tools are not in use and
also prior to shutting down the engine.
Caution: DO NOT START ENGINE UNLESS ALL HOSES ARE
CONNECTED. DO NOT BREAK HOSE CONNECTIONS
WHILE POWER UNIT IS OPERATING.
Hurst Hydraulic Hose
The hydraulic hose has a 4-to-1 safety factor of 20,000 pounds and operates at
5,000 pounds on each hose. Hoses are equipped with quick-disconnect couplings.
To operate the quick-disconnect couplings, align the slot in the sleeve with the pin,
slide sleeve back to connect or disconnect the coupling. (See Figure 24.) After
connecting, rotate sleeve one-quarter to one-half turn to prevent inadvertent or
accidental disconnection.
Figure 24
Connect couplings on the short hoses from the tool to the quick-disconnect
couplings on the long hoses from the manifold block/power unit. Align slot with pin
before you connect or disconnect couplings. Connections will be made before
starting the power unit.
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Multi-Tool Manifold Block
The multi-tool manifold allows automatic pressure changeover to any of the
connected tools. Up to three Hurst tools can be connected to a single power unit
and simplify hydraulic hose layout. The manifold block is also equipped with a
pressure dump valve (See Figure 25).
Figure 25
To begin the connection sequence, connect the 30-foot hydraulic extension hose
from the power unit to the POWER UNIT position on the manifold. The pressure
dump valve must be in the CAPS position when adding or removing equipment from
the manifold block. When connecting the hoses to the tools from the manifold, either
port (No. 1 or No. 2) may be utilized. When performing a single-tool use, the other
hose must be coupled to complete a hydraulic circuit. In the case of multi-tool use,
with the combination of rams and spreader (or cutter), the ram must be coupled to
the No. 2 port. A deviation from this step will cause the spreader or cutter to operate
at a slower rate due to the fluid resistance in the ram (See Figure 26).
Figure 26
(Two tools are connected to the No. 1 and No. 2 positions;15-inch jumper hose is
connected to the No. 3 position;and the power unit is connected to the power unit
position.)
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After ensuring all lines are properly connected, start the power unit and move the
dump valve lever on the power unit to the “PRESSURE” position. Always move the
power unit dump valve lever to the “DUMP” position before attempting to disconnect
any hoses from tools, manifold, or power unit.
Check the manifold block periodically to ensure all fittings are secure. If connectors
become clogged with sand, dirt, or grit, rinse with water only. DO NOT use
petroleum-based cleaners such a gasoline or spray lubricants.
Spreader
The Hurst spreader weighs 52 pounds (JL-27) and 70 pounds (JL-32B). The
spreader will produce up to 16,000 pounds of spreading force at tips and 14,000
pounds of pulling force at shackle holes, to a maximum of a 32-inch spread. The
spreader is evenly balanced at the crossbar.
The control valve is located over the cylinder for ease of left- or right-hand operation
(See Figure 27).
Figure 27
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Spreader Chains
The Hurst spreader chains have a working pressure of 25,000 pounds and can be
used without removing the spreader tips. The U-bolt assembly attached to the
chains allows the chains to be connected to the spreader arms without removing the
spreader tips.
To attach chain shackles to the tool, force short jaw retainer pins out of the arm. Slip
chain shackle over the jaw and arm and insert long faspin, locking shackle to arm
(See Figure 28). Ensure hooks are both facing the same direction, up or down.
Attach the chains from same direction (side) to prevent the arms from twisting (See
Figure 29).
Figure 28 Figure 29
Cutter
The Hurst cutter weighs 39 pounds and produces a cutting force of 38,000 pounds
at blade center and 70,000 pounds at notch. Cutter opening is six inches. The
control valve is located over the cylinder for ease of left- or right-hand operation.
The cutter is capable of cutting door posts, door struts, seat backs, and brake
pedals. It should not be used to cut hardened steel, such as door pins. It is capable
of cutting through steering columns; however, it is recommended steering columns
only be cut as a last resort (See Figure 30).
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Figure 30
Ram
The Hurst ram weighs up to 36 pounds and can produce a maximum of
15,000 pounds of spreading force to a maximum of 25 inches spread distance. The
average spread distance is roughly 75 percent of the cylinder body length (See
Figure 31).
Figure 31
INFORMATION
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DEFINITIONS
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CROSS-REFERENCES
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