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Fig. 1 

 

Cutting 

1.  Be especially careful when cutting off short lengths (12 inches or less) as the but end tends to 

fly out. 

 

CAUTION:

 Flying ends are a hazard to all personnel in the vicinity. Erect safety screens. 

2.  Do not cover air vents. 

If the events are covered, motor will overheat and may burn out.

 

3.  If hydraulic oil exceeds 158

°

F in temperature, power will drop. 

Allow  unit  to  cool  before  resuming  operation.  (Be  particularly  careful  in  summer,  when  the 
aluminum pump case heats up quicker.) 

4.  If a drop in power is noticed and the motor is unusually hot, check carbon brushes.

 

5.  If  piston  should  ever  fail  to  retract  completely,  push  rear  cutter  block  backwards  to  manually 

retract piston.

 

 

CAUTION:

 Use a rebar or flat metal bar for this purpose. Never push cutter block with any 

part of the hand, even if gloved. 
Once piston has been retracted, pull trigger-switch long enough to partially advance piston. Unplug 
unit. Check piston and housing for accumulated dirt and iron filings that maybe jamming the piston. 
If, after cleaning, piston still does not automatically retract when fully extended, the piston itself may 
be damaged. Return the unit to an authorized service center for repair. 

MAINTENANCE

 

Cutter Blocks

 

Before using, always check that the two bolts on each cutter block are properly tightened. Operating 
with a loose block will result in damage to block and housing. Also check condition of cutter blocks. 
If  either  cutting  edge  is  dull  or  chipped,  remove  retaining  bolts  and  rotate  both  blocks  so  that  two 
new edges come into use. Replace and tighten bolts (each block has four cutting edges). When all 
four cutting edges have been used or if either block is cracked or otherwise damaged, replace both 
blocks. 

 

CAUTION:

 A loose or cracked block may result in injury to operator. 

 

Cleaning

 

Clean cutter every day, preferably immediately after use. 

 

CAUTION:

  Wear  gloves  to  protect  hands  from  metal  splinters.  Do  not  use  an  air-gun 

blasting with air can cause metal filings and/or dust to get into eyes and respiratory system. 
1.  Disconnect unit. 

Summary of Contents for 999320

Page 1: ...WNER S MANUAL WARNING Read carefully and understand RULES FOR SAFE OPERATION and instructions before operating Failure to follow the safety rules and other basic safety precautions may result in serio...

Page 2: ...d for any application other than that for which it was designed If you have any questions relative to a particular application DO NOT use the machine until you have first contacted Northern Tool Equip...

Page 3: ...ds may cause a fire and increase the risk of electric shock Grounded tools must be plugged into an outlet properly installed and grounded in accordance with all codes and ordinances Never remove the g...

Page 4: ...Use the correct power tool for your application The correct power tool will do the job better and safer at the rate for which it was designed Do not use the power tool if the switch does not turn it...

Page 5: ...he proper thickness for the length See table below Cord length Cord size AWG Up to 10 m 33 ft 16 Up to 15m 50 ft 14 Up to 30m 100 ft 10 6 Before plugging in make sure that the switch lock is OFF CAUTI...

Page 6: ...Check piston and housing for accumulated dirt and iron filings that maybe jamming the piston If after cleaning piston still does not automatically retract when fully extended the piston itself may be...

Page 7: ...that pump case is full to the brim If oil level is too low top up with 20 weight hydraulic oil with anti foam and anti abrasion properties 7 After topping off extract air from system by gently tilting...

Page 8: ...s Nominal brush life is 200 hours Worn brushes will result in loss of power cause the motor to run hot and irreparably damage the armature s commutator 1 Disconnect unit from power supply 2 Unscrew bo...

Page 9: ...Page of 11 9 DIAGRAM PARTS LIST...

Page 10: ...case oil seal 54 Stator coil 17 Snap ring 55 Motor housing 18 Ball ring 56 Sleeve 19 Seal washer 57 Foot 20 Oil plug M 10 8 58 Cat bolt M5 80 21 Piston oil seal rear 59 Set screw M4 5 22 Piston key 60...

Page 11: ...lica from bricks and cement and other masonry products and arsenic and chromium from chemically treated lumber Your risk from these exposures varies depending on how often you do this type of work To...

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