OPERATION MANUAL MINI-CRAWLER CRANE

Serial No. G0121 and up

k WARNING

Unsafe use of this machine may cause serious injury or death. Operators must read this manual before operating this machine. This manual should be kept near the machine for reference and periodically reviewed by all personnel who willcome intocontact with it.

Notice

MAEDAhas Operation Manual written in some other languages. If aforeign languagemanual isnecessary, contact yourlocaldistributorforavailability.

1. INTRODUCTION

Thank you for purchasing our Mini Crawler Crane “MC-174CRM” . This manual is a guidebook for the safe and effective use of this machine. This manual describes the procedures for proper operation and maintenance of the machine. Warnings and precautions defined in this manual must be observed for safety. Accidents are caused when operation, inspection, or maintenance is not followed according to these guidelines.

Be sure to read this manual and understand the procedures for machine operation, inspection, and maintenance thoroughly before operating this machine. Failure to observe the basic precautions defined in this manual may lead to hazardous accidents.

Failure to use this machine properly can lead to serious personal injury or death. Operators and maintenance personnel must always read this manual prior to operation or maintenance of this machine. Save this manual at a designated place for reference when necessary. All personnel who work on this machine are to carry out periodic reference.

• Only those who have a thorough understanding of the fundamental procedures provided in this manual are qualified to perform machine operation.

• Keep this manual handy for reference when necessary.

• Should you lose or damage this manual, contact Maeda or our sales service agency immediately for ordering a new manual.

• This manual should always accompany this machine upon transfer of the machine to the next owner.

• This manual has adopted data that was available at the time of the creation of the manual.

The contents of this manual, including maintenance specifications, tightening torque, pressure, measuring method, adjustment value, and illustrations, are subject to change upon unremitting refinement of the machine, without notice. Machine maintenance may be susceptible to revisions. Always obtain the latest information from Maeda or our sales service agency before performing maintenance of this machine.

For safety instructions, see “2. For Safe Use of Machine” on page 1-3 and “Safety” on page 2-1.

2. FOR SAFE USE OF MACHINE

This manual classifies the risks into the following three categories to present the details of the safety labels in easy-to-understand manner.

This denotes that there is an imminent hazard which will cause serious personal injury or death.

Follow instructions to avoid danger.

This denotes that there is a hazard which can cause serious personal injury or death.

Follow instructions to avoid danger.

This denotes that there is a potential hazard which may cause minor or moderate personal injury or serious damage to this machine.

Follow instructions to avoid danger

This manual also provides the following to indicate what must be observed for the sake of the machine and what will be of help.

Caution Notes

This denotes that failure to handle the machine properly may damage the machine or shorten its life.

This denotes helpful information.

This manual covers not only procedures for operation, inspection, and maintenance of this machine, but also safety precautions where this machine is only used for specified tasks. Not every event is foreseeable and therefore, cautions given in this manual and on this machine do not necessarily cover every safety-related issue.

The result of operation, inspection, and maintenance carried out in a way that is not described in this manual are your responsibility

Even in the above case, never attempt any work or operation that this manual prohibits you to do.

3. MACHINE OVERVIEW

3.1 SPECIFIED OPERATIONS

This machine is to be used for operation listed below.

• Crane operation

This machine is a mobile crane with a rubber track travelling dolly (carrier) mounted with a boom crane. This self-propelled crane is capable of moving (travelling) in the worksite and craning an object weighing within the rated total load

This is also a remote-controlled crane.

3.2 MACHINE CONFIGURATION

EXTERNAL VIEW

(1) Travelling dolly

(2) Crane

(3) Safety device

Viewed from the operator’s seat, the front, back, left, and right of the machine are determined in this manual, viewing in the travelling direction (front) of the machine

Boom slewing motion is determined with the machine viewed from immediately above; slew clockwise denotes right-handed motion and slew counterclockwise denotes left-handed motion.

This machine is composed of the units listed below.

[1]

Travelling Dolly

This is composed of a travelling gear, engine, travelling operation unit, and crane operation unit

[2]

Crane

This is composed of a telescoping system, derrick system, hook block, winch system, and outrigger system.

[3] SAFETY DEVICE

This is composed of the following parts and devices: Over hoist detector/automatic stop device, angle indicator, hydraulic safety valve, hydraulic automatic locking device, slinging rope detachment protector, alarm buzzer, audio alarm, level, crane tip-over alarm (an alarm issued in the event of the crane operation at 3-degree inclination and travelling at 15-degree inclination), travelling lever lock, travelling/crane selector switch (designed to prevent the machine from craning at travelling), moment limiter (working envelope limited), working status lamp

3.3 MACHINE FUNCTIONS

[1]

Travelling Dolly

• This is a compact machine designed to keep the overall width between the crane and outrigger minimized with them housed (in travelling position). This compact design is ideal for work in confined areas.

• Two-travelling lever operation enables not only direction changes among forward, backward, and right/left but pivot turn and spin turn.

[2]

Crane

• An automatic slide outrigger is included in the crane to permit outrigger extension and grounding from the operator’s station.

• Through the combined use of telescoping, derricking, slewing, and winch system operation, the crane is capable of raising or lowering the hook block and moving an object weighing within the rated total load to a designated position within the confines of the working envelope.

• Remote-control units allow remote outrigger setting and remote crane operation.

4. QUALIFICATION FOR OPERATION

• A high incidence of occupational accidents in crane operation has been reported. Be aware that experienced engineers are also no exception

• Warnings and precautions defined in this manual shall be observed for safety assurance during operation of the machine.

4.1 QUALIFICATION FOR CRANE OPERATION

Only personnel that have obtained the correct training or license stipulated by laws and regulations applicable to the place of use are qualified to operate this machine. Contact the relevant government office or our sales service agency for further information.

5. TERMINOLOGY

5.1 DEFINITION

OF TERMS

[1] RATED TOTAL LOAD

This is the maximum load that can be applied according to a boom length and angle. The load includes the mass (weight) of hoisting accessories (hooks) and slinging ropes.

[2] RATED LOAD

This is a load derived by subtracting the mass (weight) of hoisting accessories (hooks) and slinging ropes from the rated total load, which is a withstand load for hoisting.

[3] WORKING RADIUS

This is a horizontal distance between the axis of slewing and the hook center.

[4] BOOM LENGTH

This is a distance between the boom primary pin and the sheave pin of the end boom.

[5] BOOM ANGLE

This is an angle which the boom forms with the horizontal plain

[6] LIFTING HEIGHT ABOVE GROUND

This is a vertical distance between the hook bottom and the ground with the hook raised to the upper limit.