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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
Summary of Contents for Jackhamer JRD50
Page 7: ...Notes...