wheeler 7991 Operation Manual Download

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PIPE MACHINE

Model No. 7991

Wheeler-REX

OPERATION MANUAL

Be sure to read this

Operation Manual before
using the machine

- Note -

Be sure to hand this operation manual to the user.

To ensure safe and efficient use of this machine, read this

operation manual very carefully before use.

Be sure to keep this operation manual where the operator can
refer to it whenever necessary.

Summary of Contents for 7991

Page 1: ...ion Manual before using the machine Note Be sure to hand this operation manual to the user To ensure safe and efficient use of this machine read this operation manual very carefully before use Be sure to keep this operation manual where the operator can refer to it whenever necessary ...

Page 2: ...nism 13 14 15 16 13 Cutting Threads Daily inspection maintenance Repairs Before requesting repairs or servicing A WARNING and A CAUTION 17 A WARNING In this operation manual warnings are divided into and A CAUTION A WARNING indicates actions which could possibly result in death or severe injury to the user if the machine is used incorrectly A CAUTION indicates actions which could possibly result i...

Page 3: ...normality is noticed stop operation immediately When operation of the machine is not smooth or abnormalities such as unusual smells vibration or noise are detected immediately stop operation of the machine Check symptoms against the items in Troubleshooting Methods in the operation manual observe corresponding instructions If the machine is used continuously overheating smoke or fire might occur c...

Page 4: ...and plug If damaged ask your sales agent or our sales branch for repairs If an extension cord is used inspect the cord periodically and if damaged replace it If extension cords are used outdoors use cords designed for outdoor use to prevent electric shock short circuit or fire Keep grips dry and clean and free of oil and grease Slipping may cause injury 17 Check for damaged parts Before using the ...

Page 5: ...The dies will be very hot just after completing threading To avoid bums and other injuries avoid touching them until they have cooled down j Die head and dies Use the die head and dies that correspond to the diameter of the pipe to be threaded Attach the die head correctly to the Carriage Before starting threading set the die head to the threading position tum the switch ON and make sure the threa...

Page 6: ... drink the oil Drinking the oil may cause diarrhea or vomiting Emergency treatment Do not let the person vomit forcibly seek medical attention immediately Do not place the oil where it is easily reached by small children j Be particularly careful about the risk of fire Depending on the country of use the oil may be classified as a hazardous material To prevent fire or explosions always familiarize...

Page 7: ...ith a blanket keep them warm and relaxed and seek medical attention Do not drink the oil Drinking the oil may cause diarrhea or vomiting Emergency treatment Do not let the person vomit forcibly seek medical attention immediately Do not place the oil where it is easily reached by small children Do not thin the oil or mix it with threading produced by other companies If the threading oil gets contam...

Page 8: ...age and headstock from colliding toprevent the machine from becoming damaged P 13 New Design 3 Size Auto Open Die Head High Power Motor Built in 400 W motor the highest in its class plus improved safety provided bythe double insulated motor P 10 Large Capacity Tank Spacious tank makes chip cleanup easy Handle Locking Pin Foot switch standard Specifications Standard Accessories No 7991 Threading ca...

Page 9: ...rface the unit is designed so that the rear section will be slightly raised AcAUTION If the rear scroll end is low oil will drain out of the rear of the pipe etc soiling the floor and wasting oil Fill the tank with the Wheeler Rex threading oil 4 Attaching and Removing the Die Head Fig 4 Removing the die head I Loosen the locking screw on the carriage 2 Lift the die head slightly in the direction ...

Page 10: ...st also be changed changing Dies The screw pitch is different for l 2 15A 3 4 20A and 1 25A so when the notch positions are changed the die must also be changed You should also use the following procedure to change the die when it is worn and needs to be replaced 1 Push up the auto open lever to open the die head 2 Remove the positioning pins from the notches and pull the guide set lever in the di...

Page 11: ...ightly 2 To increase the thread diameter turn the eccentric pinto the side clockwise To decrease the diameter turn the eccentric pin to the side anti clockwise 3 When the adjustment is complete retighten the eccentric pin locking bolt Adjusting the Thread Diameter Using a Size Adjustment Plate If the thread diameter cannot be adjusted properly even when the positioning pin is turned all the way us...

Page 12: ... Then loosen the rear chuck and remove the pipe Attaching Short Pipes for Thread Cutting Fig 13 Clamp the pipe lightly with the chuck and using the blade of the die support the end where threads will be cut Then once again pull the hammer chuck toward you to fasten the pipe tightly in place This will ensure that the pipe does not vibrate and threads are cut smoothly However be sure to fasten the p...

Page 13: ...f the pipe is vibrating etc fasten it in place again Make sure cutting oil is coming out of the die head and check that the machine is filled with the correct amount of threading oil 2 Let the machine idle Jar a few minutes Make sure the motor does not heat up excessively etc AwARNING 1 Always use the recommended type of carbon brushes The brake may fail to operate if other carbonbrushes are used ...

Page 14: ...le up to 1 2 tum for each rotation of the pipe Fig 17 Avoid cutting with excessive force from the beginning or the shape of the pipe may become distorted prevent ing you from making accurate circular threads Throughout the process tum the cutter handle against the pipe lightly and evenly A CAUTION Make sure the cutter is placed in the proper position before turning the pipe If the cutter is improp...

Page 15: ...t with your bare hands as you may be seriously injured esefore Cutting Threads I 1 1 Carriage Protection Mechanism I Attempting to cut threads on pipes that are too short may cause the carriage to strike the headstock warping or otherwise damaging the unit Accordingly the unit is equipped with a carriage anti collision mechanism This mechanism protects the machine by automatically stopping the mot...

Page 16: ...3 Tum the feed handle clockwise and press the die head against the pipe to allow the dies to begin cutting Fig 24 4 Once three or four threads have been cut the remainder will be cut automati cally When the prescribed thread length is reached the dies will be released by the auto open lever 5 To complete the threading procedure tum the feed handle anti clockwise to retract the die head from the pi...

Page 17: ...this unit is equipped with two auto stop carbon brushes When these brushes get too worn the motor will not operate even when the unit is turned on Be sure to use the recommended type of carbon brush Use of other brushes will impair braking performance AcAUTION Be sure to replace both carbon brushes A and B Be sure to use the recommended type of carbon brush When replacing the carbon brushes always...

Page 18: ...4 When all of the chips and dust that have collected in the tank have been discharged replace the drain plug Then replace the tank partitions and fill with threading oil 4 Chuck Configuration and Care Fig 31 The chuck jaw insert on the end of the chuck should be kept clean Use a wire brush or the like to clean away any grime that clogs it When the chuck jaw insert needs replacing contact your dist...

Page 19: ...the become disconnected switch is turned OFF Oil is not supplied correctly The amount of oil is low Replenish the oil Tank is clogged with chips Remove chips in the oil tank The die head is not fitted Place the die head in the correctly correct position Oil drips from the back of Therear chuck is too low Raise the rear chuck the pipe etc The die head cannot be Chips are in the way Remove chips stu...

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