Amkus GH2S2 Series User manual

©Copyright Amkus Rescue Systems, Inc. 2012- 2017 LAP-009 May 3, 2017 Rev05
DANGER Understand manual before use. Operating AMKUS Rescue Systems without understanding
the manual, receiving proper training, and using appropriate personal protective equipment is
a misuse of AMKUS equipment. This manual does not fully address safety. Additional safety
information is published in AMKUS Safety Manual LAA-001. Obtain safety information at
www.amkus.com/resources/information
Manual: GH2S2 Series
Power Unit
AMKUS RESCUE SYSTEMS
www.amkus.com
4201 Montdale Drive, Valparaiso, IN 46383-4098 USA
800-592-6587 • 219-548-5000 • Fax [phone]
This manual is intended for use with manuals published by manufacturers of the prime movers (engine and
pump) used in this power unit.
Certifi ed Model
NFPA 1936, 2015 Edition
©Copyright Amkus Rescue Systems, Inc. 2016 LAA-001 April 15, 2016 Rev00
DANGER Understand manual before use. Operating AMKUS Rescue Systems without understanding the
manual, receiving proper training, and using appropriate personal protective equipment is a
misuse of AMKUS equipment. Obtain safety information at www.amkus.com/
This Safety Manual is intended to familiarize rescue workers and maintenance personnel with the safety messages of AMKUS
Rescue Systems, including powered rescue tools (rams, cutters, spreaders, combination tools), power units (electric or gasoline
driven), and powered rescue tool components (cable assemblies, hose assemblies, hose reels, etc.). The safety messages in this
publication supersede safety information appearing in AMKUS publications prior to April 2016.
This manual is intended for use with manuals published by manufacturers of prime movers (engines, electric motors, and pumps)
used in AMKUS power units.
This manual does NOT address operation or servicing of AMKUS Rescue Systems. Only competent rescue tool repair technicians
are quali¿ ed to repair AMKUS equipment. This manual should be available to all personnel involved with AMKUS equipment.
SAFETY MANUAL for AMKUS
RESCUE SYSTEMS
AMKUS RESCUE SYSTEMS
www.amkus.com
4201 Montdale Drive, Valparaiso, IN 46383-4098 USA
800-592-6587 • 219-548-5000 • Fax [phone]
EN13204 Designation: MTO
GH2S2-XL GH2S2-XLNT GH2S2-STD
Power unit with cage and hose hoop Power unit with cage Power unit with carrying handle

©Copyright Amkus Rescue Systems, Inc. 2012- 2017 LAP-009 May 3, 2017 Rev05
2
DANGER
PERSONAL RESPONSIBILITY CODE
The member companies of FEMSA that provide emergency response
equipment and services want responders to know and understand the
following:
1. Firefi ghting and Emergency Response are inherently dangerous activities
requiring proper training in their hazards and the use of extreme caution
at all times.
2. It is your responsibility to read and understand any user’s instructions,
including purpose and limitations, provided with any piece of equipment
you may be called upon to use.
3. It is your responsibility to know that you have been properly trained in
Firefi ghting and /or Emergency Response and in the use, precautions, and
care of any equipment you may be called upon to use.
4. It is your responsibility to be in proper physical condition and to maintain
the personal skill level required to operate any equipment you may be
called upon to use.
5. It is your responsibility to know that your equipment is in operable
condition and has been maintained in accordance with the manufacturer’s
instructions.
6. Failure to follow these guidelines may result in death, burns or other
severe injury.
FEM SA
Fire and Emergency Manufacturers and Service Association
P.O. Box 147, Lynnfi eld, MA 01940 • www.FEMSA.org
Table Of Contents
1.0 MEANING OF SAFETY SIGNAL WORDS
2.0 SPECIFICATIONS
2.1 PART IDENTIFICATION
3.0 PROTECTIVE CLOTHING
4.0 TRAINING
5.0 SET-UP PROCEDURE
6.0 GETTING STARTED
7.0 OPERATING INSTRUCTIONS
7.1 GENERAL
7.2 SELECTOR VALVES
8.0 TROUBLE SHOOTING GUIDE
9.0 ROUTINE MAINTENANCE
9.1 ROUTINE MAINTENANCE FOR GASOLINE ENGINE
9.2 ROUTINE MAINTENANCE FOR HYDRAULIC PUMP
9.3 ROUTINE MAINTENANCE FOR HOSES
9.4 ROUTINE MAINTENANCE FOR COUPLINGS
9.5 MAINTENANCE RECORDS
10.0 INSPECTION, CLEANING, DECONTAMINATION, AND
STORAGE
11.0 PARTS, SERVICE AND TECHNICAL INFORMATION
1.0 MEANING OF SAFETY SIGNAL WORDS
A safety related message is identifi ed by a safety alert symbol and a signal word to indicate the level of risk involved with a particular
hazard. Per ANSI standard Z535.6-2011, the defi nitions of the four signal words are as follows:
DANGER DANGER indicates a hazardous situation which, if not avoided, will result in death or serious
injury.
WARNING WARNING indicates a hazardous situation which, if not avoided, could result in death or serious
injury.
CAUTION CAUTION indicates a potentially hazardous situation which, if not avoided, could result in minor
or moderate injury.
NOTICE NOTICE is used to address practices not related to physical injury.

©Copyright Amkus Rescue Systems, Inc. 2012- 2017 LAP-009 May 3, 2017 Rev05
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2.0 SPECIFICATIONS
GH2S2-XL Power Unit Specifi cations
Length 23.0 in 584 mm
Width (with one hose loop standard) 19.0 in 483 mm
Height 20.5 in 521 mm
All weights include gas, engine oil, and hydraulic fl uid
Weight with Standard Couplings 114.0 lbs 51.7 kg
Rated Output Pressure 10,500 psi 724 bar
GH2S2-XLNT Power Unit Specifi cations
Length 20.5 in 521 mm
Width (with one hose loop standard) 18.8 in 478 mm
Width (with no hose loop) 16.0 in 407 mm
Height 19.5 in 495 mm
All weights include gas, engine oil, and hydraulic fl uid
Weight with Standard Couplings 111.7 lbs 50.7 kg
Rated Output Pressure 10,500 psi 724 bar
GH2S2-STD Power Unit Specifi cations
Length 19.5 in 495 mm
Width 15.0 in 381 mm
Height 22.0 in 559 mm
All weights include gas, engine oil, and hydraulic fl uid
Weight with Standard Couplings 105.0 lbs 47.6 kg
Rated Output Pressure 10,500 psi 724 bar
Hydraulic Specifications
Rated Output Pressure
Rated Flow Of The Pump fi rst stage 150 in 3/min 2460 cc/min fi rst stage
40 in3/min 660 cc/min second stage
Fluid Type: AMKUS MV1 Mineral Base Hydraulic Fluid. Safety Data Sheet (SDS) for AMKUS
MV1 Hydraulic Fluid is available at AMKUS.com and CHEMTREC.com
(For equipment stored and operated in environments below 32 deg. F (0 deg C) contact
Amkus Rescue Systems for recommendation.
Hydraulic Fluid Reservoir Capacity: 2.0 gals. US 7.6 liters
Usable Hydraulic Fluid Capacity: 1.45 gals. US 5.5 liters
Maximum Angle of Inclination: 20 degrees from horizontal
Engine Specifi cations
Engine Honda GXV160 4.3 bhp (3.2 kW)
Engine Oil *Refer to Honda GXV160 owner’s manual.
Fuel *Refer to Honda GXV160 owner’s manual.
DECLARED DUAL-NUMBER NOISE EMISSION VALUES in accordance with EN ISO 4871
Measured A-weighted emission sound pressure level, LpA (ref. 20μPa), in decibels: 88.6
Uncertainty, KpA, in decibels: 1.5
Measured A-weighted sound power level, LWA (ref. 1 pW), in decibels: 100.5
Uncertainty, KWA, in decibels: 1.5
Values determined according to Annex B of EN 13204 using the basic standards
EN ISO 3744 and EN ISO 11201.
Note: The sum of a measured noise emission value and its associated uncertainty represents an upper
bound of the range of values which can occur in measurements.

©Copyright Amkus Rescue Systems, Inc. 2012- 2017 LAP-009 May 3, 2017 Rev05
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2.1 PART IDENTIFICATION
Sight Glass
Hydraulic Fluid
Reservoir
Fuel Fill Cap
Selector Valve
Knobs
Hydraulic Fluid
Fill Plug/Vent Cap
Return Ports
Pressure Ports
Safety Label
Engine Oil Filler Cap
with Dipstick
Starter Grip
Hose Loop
Hydraulic Fluid
Drain Plug (in rear)
Serial Number
Standard Couplings
Mono Couplings
ThrottleFuel Shut Off

©Copyright Amkus Rescue Systems, Inc. 2012- 2017 LAP-009 May 3, 2017 Rev05
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3.0 PROTECTIVE CLOTHING
It is the responsibility of the user to insure that appropriate protective clothing and equipment are used to provide protection from
those hazards to which personnel are exposed or could be exposed while working with this product.
4.0 TRAINING
This product is designed to be used by emergency services personnel to facilitate the extrication of victims from entrapment. Its
use should be limited to trained personnel only. All personnel using this equipment are assumed to have completed a course of
instruction that is acknowledged as being educationally sound by the local authority having jurisdiction over such training. This
document contains basic operating and maintenance instructions only.
Normally, AMKUS equipment is prepared and serviced by your dealer prior to delivery. If, however, you have decided to place the
equipment into service yourself, please review the following instructions carefully.
1. Remove equipment from the packing cartons and carefully inspect for damage. Damage that occurs during shipment should be
reported immediately to the carrier.
2. The Honda® engine that powers this unit is shipped without engine oil. Fill the engine crankcase with the proper oil as specified
in the engine owner’s manual and verify oil level using the dipstick.
3. Next, remove the hydraulic fluid reservoir fill plug/vent cap. Fill the hydraulic fluid reservoir with approximately 2.0 gallons U.S.
(7.6 liters) of AMKUS mineral base hydraulic fluid. The fluid should reach a level that fills approximately ½ of the sight gauge
window. Replace the fill plug/vent cap.
4. Following the instructions in the engine owner’s manual, fill the engine fuel tank with the specified fuel. Avoid getting dirt or water
in the fuel tank. Never use stale or contaminated gasoline or an oil/ gasoline mixture.
5. This power unit may be supplied either with hydraulic hoses attached (pump hoses) or with couplings (standard or mono) that
require extension hoses.
• If your unit is equipped with pump hoses with standard couplings, connect the male and female couplings at the end of each
hose set, creating a loop.
• If your unit is equipped with standard couplings, attach the extension hoses to the couplings on the power unit, and connect the
male and female couplings at the opposite end of each hydraulic hose line set, creating a loop.
• If your unit is equipped with mono couplings, simply make sure that the hoses are connected to the power unit.
6. Prior to starting the engine, place the selector valves in their neutral positions. Follow the operating instructions in the engine
owner’s manual for starting the engine. Then operate the engine in the fast throttle position.
7. To purge air from the hydraulic hoses, charge each hose line by moving the knob on the corresponding selector valve to the
pressure position (in line with the selected hose line) and allowing the fluid to circulate through each hose line for at least one
minute. Move each selector valve back to the neutral position.
8. Check the level of the hydraulic fluid in the sight gauge. Add more fluid if necessary. DO NOT OVERFILL.
9. If your unit is equipped with standard couplings, uncouple the male and female couplings on each hydraulic hose line set to open
the loop that was created earlier. The power unit is now ready to use.
5.0 SET-UP PROCEDURE
AMKUS manufactures equipment with superior craftsmanship and quality backed by the standard warranty published on the
AMKUS website.
NOTICE The engine ships WITHOUT OIL. Running engines dry or with an overfi lled crankcase can quickly
ruin the engine.
NOTICE Only use AMKUS tools with AMKUS equipment. Mixing AMKUS tools with another manufacturer’s
equipment may cause operational problems, equipment failure, or denial of warranty claims.
NOTICE Only use AMKUS mineral-base hydraulic fluid in AMKUS equipment. Using another manufacturer’s
hydraulic fluid in AMKUS equipment may cause operational problems, equipment failure, or
denial of warranty claims.

©Copyright Amkus Rescue Systems, Inc. 2012- 2017 LAP-009 May 3, 2017 Rev05
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7.0 OPERATING INSTRUCTIONS
7.1 GENERAL
The GH2S2 series power units are simultaneous operation power units. Two tools can be connected simultaneously and operated
either independently or simultaneously.
Prior to starting the engine, place the selector valves in their neutral positions. Start the engine by following the instructions in the
engine owner’s manual. Operate the engine at fast throttle for maximum rescue tool speed and performance. Use the idle position
only when the rescue tools are not being operated.
When you have finished operations, place the selector valves in their neutral positions. Follow the instructions in the engine owner’s
manual to stop the engine.
Please note that the minimum safe bend radius of the hoses is 4 inches (101.6 mm).
7.2 SELECTOR VALVES
The GH2S2 series power units are equipped with a pair of (2) two position selector valves. When facing the front of the power unit,
the selector valves are in the Neutral position when perpendicular to the hose line, as shown below.
In order to operate a tool that is connected to the left set of hoses, move the left selector valve handle to the flow position, or toward
the center of the power unit. In order to operate a tool that is connected to the right set of hoses, move the right selector valve handle
to the flow position, or away from the center of the power unit. The two tools can be operated independently or simultaneously.
Neutral PositionLeft Oil Flow - Right Oil Flow
To stop the flow of hydraulic fluid, move the knob of the corresponding selector valve to the neutral position (perpendicular to the
hose line). The selector valve should be in the neutral position when an operation is finished or to stop the flow of hydraulic fluid.
6.0 GETTING STARTED
Connect the tool connection hoses to the hose lines from the AMKUS hydraulic power unit.
1. For power units equipped with standard couplings: The male and female couplings on the tool connection hoses should be
connected to the corresponding male and female couplings on the hose lines leading from the power unit. To connect the
couplings, twist the sleeve on the female coupling so that the notch in the sleeve lines up with the pin. Push the sleeve back so
the pin fits into the notch. While holding the sleeve back, push the male coupling into the female coupling. Release the sleeve;
it will spring forward into place. Twist the sleeve ¼ turn so that the pin no longer lines up with the notch. Pull on the couplings to
check that they are securely connected.
2. For power units equipped with mono couplings: The male coupling on the tool connection hoses should be connected to the
corresponding female coupling on the hose lines leading from the power unit. To connect the couplings, place the male coupling
into the female coupling. Rotate clockwise until you feel the coupling latch. Pull on the couplings to check that they are securely
connected.
NOTICE In most cases, the mono couplings can be connected and disconnected while the hose line(s)
are under fl ow. It is usually not necessary to place the directional control(s) of the power unit
in the neutral position before connecting and disconnecting. However, certain circumstances,
such as back pressure in the return line(s) and/or cold temperatures, may make connecting
and disconnecting under fl ow extremely diffi cult or impossible. If you are unable to connect or
disconnect while the line(s) are under fl ow, place the directional control(s) of the power unit in the
neutral position and then connect or disconnect.

©Copyright Amkus Rescue Systems, Inc. 2012- 2017 LAP-009 May 3, 2017 Rev05
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9.0 ROUTINE MAINTENANCE
9.1 ROUTINE MAINTENANCE FOR GASOLINE ENGINE
Follow the maintenance guidelines in the engine owner’s manual.
9.2 ROUTINE MAINTENANCE FOR HYDRAULIC PUMP
Normally, you will have a maintenance agreement for your system with your local dealer. However, if you have decided to service
the equipment yourself, please review the following instructions carefully.
Change hydraulic fluid after each 20 hours of tool operation (approximately every 2 years). If you suspect your hydraulic fluid has
been contaminated in any way, contact your local dealer or AMKUS Rescue Systems.
To change the hydraulic fluid, remove the hydraulic fluid reservoir fill plug/vent cap. Place the unit over a drain pan; unscrew and
remove the drain plug. Be careful not to lose it! Allow the hydraulic fluid to drain completely. Clean and replace the drain plug. Fill
the hydraulic fluid reservoir with new AMKUS mineral base hydraulic fluid. Replace the fill plug/vent cap.
The next step is to purge air from the hydraulic hoses. Please see Set-Up Procedures points 5-9. Check the pressure output of the
power unit at each hose line by connecting a pressure gauge to the pressure line. Move the selector valve to charge the line to
which the gauge is connected.
The rated hydraulic pressure at maximum output is 10,500 psi ± 500 psi (724 bar ±34 bar). Verify performance by periodic testing
using a pressure gage. If performance falls outside of this range, contact your local dealer or AMKUS Rescue Systems.
DO NOT ATTEMPT TO ADJUST THE INTERNAL PRESSURE RELIEF SETTING! Pressure relief valves are NOT user serviceable.
User adjustment is a misuse of this equipment.
Properly dispose of all engine fuel, engine oil, and hydraulic fluid wastes. Do not release chemicals into the enviroment.
9.3 ROUTINE MAINTENANCE FOR HOSES
After each use, hoses should be wiped clean with a light cleaner such as Simple Green®. Inspect hoses for damage to the rub-
ber outer cover. Damage which exposes the wire braided reinforcement subjects the wire to corrosion and may weaken the hose.
Replace damaged hoses.
9.4 ROUTINE MAINTENANCE FOR COUPLINGS
Use care when making hydraulic connections by avoiding dirt, sand, and water puddles at the emergency scene. Even with care,
residual oils on the moving parts will gradually accumulate dirt and grit making connections difficult. Couplings and dust caps can
be periodically cleaned using an automotive type aerosol solvent de-greaser. Avoid water-based cleaning products. Apply a light
spray lube (automotive, lock, or gun type) to keep the collars moving easily. Avoid covering a clean coupling with a dirty dust cap.
Replace damaged fittings.
9.5 MAINTENANCE RECORDS
It is the responsibility of the user to keep maintenance records for each component of the rescue system. Maintenance shall be
performed by qualified service technicians in accordance with the recommendations as outlined in this manual.
8.0 TROUBLE SHOOTING GUIDE
Any problem not resolved by the following suggestions may require contacting your local dealer or AMKUS Rescue Systems for
further guidance.
Problem Solution
Engine will not start or
poor engine performance
Check Honda owner’s manual.
Check fuel level
Tool lacks power
or speed
Check hydraulic fluid level in power unit reservoir.
Fluid leaks at fittings or
hoses
Check tightness of hose fittings.
Replace damaged hoses or fittings.
Tools do not operate Check to see that the power unit is running in fast
throttle mode.
Check to see that the line is charged.
Check hydraulic fluid level in power unit reservoir.

©Copyright Amkus Rescue Systems, Inc. 2012- 2017 LAP-009 May 3, 2017 Rev05
AMKUS RESCUE SYSTEMS
www.amkus.com
4201 Montdale Drive, Valparaiso, IN 46383-4098 USA
800-592-6587 • 219-548-5000 • Fax [phone]
10.0 INSPECTION, CLEANING, DECONTAMINATION, AND STORAGE
1. Always store the power unit in a clean, dry space.
2. Never store a power unit under pressure.
3. Store the power unit upright.
BEFORE BEING PLACED BACK IN SERVICE, power units must be inspected to this checklist;
1. Check to see that all markings are legible. Contact your local dealer or AMKUS Rescue Systems for replacement labels.
2. Wipe tool, hoses, fittings and couplings clean (see routine maintenance for hoses and couplings).
3. Inspect the power unit, hoses, fittings and couplings after each use for damage, leakage and excessive wear.
4. If the power unit becomes contaminated, determine the nature of the contamination. IE: biological, chemical, radioactive. The
authority having jurisdiction may follow internal decontamination guidelines or request technical advice from AMKUS.
5. Check engine oil per the manufacturer’ recommendations after each use.
6. Check the hydraulic fluid levels after each use. Replenish as necessary with AMKUS MV1 mineral based hydraulic fluid.
WARNING Any power unit failing any part of the checklist is unsafe for use and must have the problem
corrected before use or being placed back into service. Operating a power unit that has failed the
checklist is a misuse of this equipment.
11.0 PARTS, SERVICE AND TECHNICAL INFORMATION
Parts, service and technical information may be obtained from your local AMKUS dealer, or by contacting AMKUS Rescue Systems.