Ingersoll-Rand Jackhamer JRD50 Maintenance Information Download Page 6

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Trouble

Probable Cause

Solution

Erratic or sluggish operation

Lubricating oil too heavy.

Use only the recommended lubricating oil.

Gummed oil or dirt in operating parts.

Dismantle Jackhamer and clean out dirt and 

gummy residue. Service the Jackhamer with 

clean oil. Protect the Jackhamer from dirt when 

idle.

Stuck Drill Steel

Driving Drill Steel after bit is dull or has lost its 

gauge.

Sharpen or replace with a new bit.

Crowding bit in soft formation.

Use down pressure cautiously in soft formations; 

be certain the Drill Steel is rotating freely.

Cuttings not being blown from hole.

Use blow air frequently.

Misalignment of Drill Steel with hole causing 

binding.

Keep Jackhamer, Drill Steel and hole in 

alignment at all times.

Slow drilling speed

Dull bit.

Replace the bit.

Cuttings not being removed from hole.

Use blow air more frequently to keep the bit 

working on fresh rock.

Plugged Drill Steel or Blow Tube.

Remove Tube and Drill Steel; clean out air 

passages.

Jackhamer and Drill Steel not aligned in hole; Drill 

Steel or bit binding in hole.

Check alignment while drilling to prevent 

binding and to avoid a stuck Drill Steel.

Insufficient down pressure.

Increase down pressure.

No Drill Steel rotation or 

rotation is weak

Steel binding in hole.

Apply correct amount of down pressure and 

keep Drill Steel and hole in alignment. Replace 

worn bits.

Worn rotation parts.

Disassemble Jackhamer and replace worn parts.

Side Rod breakage

Uneven tension on Rods or loose Rods.

Keep Side Rods tight and at even tension. 

Tighten Rods alternately.

Loss of fronthead cushion which allows Piston to 

strike Front Washer Bushing with hard impact.

Replace worn Cylinder, Piston or Front Washer 

Bushing.

Chipping or breakage of Piston

Bad Drill Steel shank which is too hard or rounded 

on end allowing minimum contact with Piston 

striking face.

Take bad shanks out of service. One bad shank 

can ruin many Pistons.

Worn Chuck which permits Drill Steel to cock in 

Chuck so that Piston strikes shank a glancing blow.

Replace worn Chuck.

Heat cracking due to faulty lubrication.

Keep Jackhamer well lubricated with proper 

type of oil.

Failure in neck of Piston due to loss of fronthead 

cushion. Piston striking Front Washer Bushing.

Check Cylinder, Piston and Front Washer 

Bushing for maximum wear tolerances.

Related Documentation

For additional information refer to:
Air Percussive Drill Product Safety Information Manual Form 04584975,
Air Percussive Drill Product Information Manual Form 04581591,
Air Percussive Drill Parts List Manual Form 16572018.
Manuals can be downloaded from ingersollrandproducts.com

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