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712MT OPERATOR’S MANUAL                            9/18/20                                            Page 3 of 16 

SAFETY MESSAGES 

 
General safety messages are listed in this Safety Messages section. Specific safety messages appear as appropriate in 
this manual where a potential hazard may occur if procedures or instructions are not followed correctly and completely. 
 

SAFETY SYMBOL 

 

This is the international safety alert symbol. This symbol is used in combination with a signal word and written 
message to warn you of a potential for bodily injury or death. 

 
A signal word "DANGER", "WARNING", or "CAUTION" is used with the safety alert symbol. 
 

DANGER

: Imminent hazards that, if not avoided, will result in serious personal injury or death. 

 

 

WARNING

: Potential hazards or unsafe practices that, if not avoided, could result in serious personal injury or 

death. 

 
 

 CAUTION

: Potential hazards or unsafe practices that, if not avoided, could result in minor personal injury, 

product damage, or property damage. 

 
Safety decals with a signal word "DANGER", "WARNING", or "CAUTION" are affixed to the trencher near specific 
hazards.   
 
Read this manual and study ALL decals on the trencher before operating the trencher. 
 
 

   SAFETY INSTRUCTIONS OVERVIEW 

 
READ SAFETY AND OPERATING INSTRUCTIONS BEFORE OPERATING!   
 
USE COMMON SENSE AND PLENTY OF IT! 
 
The left lever is the trench chain control. The right lever is the wheel drive engage control. All motion stops when the 
levers are released. 

DO NOT TAPE THE LEVERS UP or by-pass this

 

safety feature in any other way

 
Call before you dig.

 

If you do not call, you may cause an accident, suffer injuries or death, cause interruption of 

services, damage the environment, and/or incur project delays. Expect to be held liable for any damages caused if you 
fail to call. 
 

DANGER

: Buried electric cables or gas lines can cause serious injury or death if struck with dig chain. Always 

determine location of utilities before trenching. 

 

WARNING

: Fiber optic cables convey laser light that can injure your eyesight.  

 

STAY CLEAR of moving parts on the trencher.  

DANGER

: Digging chain, auger and other moving parts can cut off arms, legs, or 

fingers. Contact with the digging chain or auger while in operation will cause 

           serious injury or even death. 
 

 

Содержание HT712

Страница 1: ...mal trenching Consider using a backhoe or other heavier equipment for such conditions TABLE OF CONTENTS LUBRICATION REQUIREMENTS 2 SAFETY MESSAGES 3 SAFETY INSTRUCTIONS OVERVIEW 3 TRENCHER OPERATING I...

Страница 2: ...MT OPERATOR S MANUAL 9 18 20 Page 2 of 16 LUBRICATION REQUIREMENTS Grease at the intervals indicated per the illustration of grease lubrication points There is also a grease diagram decal on the machi...

Страница 3: ...are affixed to the trencher near specific hazards Read this manual and study ALL decals on the trencher before operating the trencher SAFETY INSTRUCTIONS OVERVIEW READ SAFETY AND OPERATING INSTRUCTIO...

Страница 4: ...can suddenly drag the machine forward if the trencher is forced too quickly into the ground or catches on a buried object WARNING Contact with the dig chain or auger while in operation will cause seri...

Страница 5: ...re performing any cleaning or maintenance Avoid contact with hydraulic fluid WARNING When machine is operating hydraulic fluid is under extreme pressure and can get under skin and burn or poison Keep...

Страница 6: ...cher a bit if necessary until each pin finds a hole to drop into The hubs are now locked Disengaging one hub makes it much easier to turn the trencher when transporting under power 2 IGNITION SWITCH T...

Страница 7: ...H There are two ignition switches One switch is located on the control panel with the other trencher controls for your convenience The other is located on the engine Use these to start and stop the en...

Страница 8: ...5 Move the THROTTLE to about 1 3 of the way back This increases throttle It is located above choke 6 Pull start cord located on engine recoil When the engine starts open the CHOKE turn choke off after...

Страница 9: ...r the digging chain slows down release the WHEEL DRIVE CONTROL until the engine recovers to operating speed then reactivate the WHEEL DRIVE CONTROL If traction is limited the trencher may be tilted ba...

Страница 10: ...your safety Use half throttle for slower transport speed Keep away from tires to avoid getting crushed WARNING Getting run over by the trencher will cause injury Never allow anybody to ride on the tre...

Страница 11: ...atch the ramps and lower to the ground 3 Line up the trencher with the rear of the trailer The dig chain should be toward the trailer 4 Throttle engine down and move control speed lever halfway betwee...

Страница 12: ...ty in the measurement given a 95 confidence interval is 1 1 m s2 Safety gloves help to isolate the hands from the vibration keep them warm and dry maintain blood circulation and make operators less su...

Страница 13: ...ermine location of utilities before trenching WARNING Fiber optic cables convey laser light that can injure your eyesight CALL 811 or 1 888 258 0808 TO LOCATE UTILITIES BEFORE TRENCHING US OR CANADA T...

Страница 14: ...e gas oil petroleum water or sewer In any case stop digging shut off the engine and evacuate the area immediately Call 911 for help Electrical wires or cables If you think that you may have severed el...

Страница 15: ...low adequate side and overhead clearances between trencher and any objects such as buildings fences and trees WARNING If the digging chain contacts an object the digging chain can climb upward quickly...

Страница 16: ...6 9 10 IGNITION 7 8 IGNITION SWITCH 6 7 8 10 LOADING 11 LUBRICATION 2 NAVIGATING 4 10 11 OPERATING INSTRUCTIONS 3 6 11 OPERATOR PREPARATION 12 PERSONAL PROTECTION 4 11 12 PLUNGE CUT 9 PROTECTION 4 11...

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