Enerpac HMT Series, Operation And Maintenance Manual

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1.  Safety

1.1  Safety Precautions 

Failure to observe and comply with the following 

precautions could result in death or serious personal 

injury. Property damage could also occur.

•  Always wear protective head-wear, ear protectors, 

footwear and gloves (at a minimum rigger type 

gloves) suitable for safe operation of the tool. 

The protective clothing must not interfere with 

safe operation of the tool or restrict the ability to 

communicate with co-workers.

•  Be sure your workplace is safe. Follow the 

instructions in your workplace’s standard 

operating procedures and be sure to observe all 

communicated safety precautions.

•  Do not place any part of the body between the 

wrench reaction foot and the reaction point.

•  Do not place any objects between the wrench 

reaction foot and the reaction point. Keep the 

hoses away from the reaction points.

•  Do not stand in the line of movement of the tool 

when it is in operation. If the tool separates from 

the nut or bolt during operation it will detach in that 

direction.

•  Be aware that a nut or bolt that breaks off during 

operation of the tool may become a high velocity 

projectile.

•  Be sure appropriate guards are securely in position 

and free from damage.

•  Keep your hands away from the fastener being 

loosened or tightened. Tightening and loosening 

nuts and bolts involves little visible movement. 

However, the pressures and loads are extreme.

•  Maximum allowable operating pressure for the 

HMT-Series torque wrench is 10,000 psi [690 bar]. 

Do not exceed this pressure setting.

•  Always be sure that pump is stopped and 

all pressure is fully relieved (0 psi/bar) before 

disconnecting or connecting hydraulic hoses. The 

sudden and uncontrolled release of pressurized oil 

could occur if hoses are disconnected while under 

pressure.

•  Never attempt to connect or disconnect hoses while 

the pump is on and/or the system is pressurized.

•  Be certain that all hose couplings are fully 

connected at both the pump and wrench ends 

before applying any hydraulic pressure. If the 

couplings are not fully connected, oil flow will be 

blocked, and the wrench could be subjected to 

excessive hydraulic pressures. Catastrophic failure 

of wrench could result.

  WARNING

Read all instructions carefully. Follow all recommended 

safety precautions to avoid personal injury as well 

as damage to the product and / or damage to other 

property. Enerpac cannot be responsible for any 

damage or injury from unsafe use, lack of maintenance, 

or incorrect operation. Do not remove warning labels, 

tags, or decals. In the event that any questions or 

concerns arise, contact Enerpac or a local Enerpac 

distributor for clarification.
Save these instructions for future use.
If you have never been trained on high-pressure 

hydraulic safety, consult your distributor or service 

center for information about Enerpac Hydraulic Safety 

Courses.
This manual follows a system of safety alert symbols, 

signals, words, and safety messages to warn the user of 

specific hazards. Failure to comply with these warnings 

could result in death or serious personal injury, as well 

as damage to the equipment or other property.

The Safety Alert Symbol appears throughout 

this manual. It is used to alert you to potential 

physical injury hazards. Pay close attention 

to Safety Alert Symbols and obey all safety 

messages

that follow this symbol to avoid the possibility 

of death or serious injury.
Safety Alert Symbols are used in conjunction with certain 

Signal Words that call attention to safety messages or 

property damage messages and designate a degree or 

level of hazard seriousness. The Signal Words used in 

this manual are DANGER, WARNING, CAUTION, and 

NOTICE.

Indicates a hazardous situation that, if not 

avoided, will result in death or serious personal injury.

Indicates a hazardous situation that, if not 

avoided, could result in death or serious personal injury.

Indicates a hazardous situation that, if not 

avoided, could result in minor or moderate personal 

injury.

Indicates information considered 

important, but not hazard related (e.g. messages related 

to property damage). Please note that the Safety Alert 

Symbol will not be used with the signal word.

DANGER

  WARNING

  CAUTION

NOTICE