B) Oil leakage

2. Breaker

Symptom

Breaker does not work

Stop breaking or erratic striking after 30 to 90 minutes of operation Tool crack

Cause

Seizure of breaker (piston or valve)

Oil entering into back head gas chamber

Oil entering into back head gas chamber

Remedy

Repair or replace worn parts

Remove oil. Check/replace gas seal and step seals. Ensure that you check if piston or cylinder has got any scratch. Remove oil. Check/replace gas seal and step seal. Also ensure that you check if piston or cylinder has got any scratch.

Tool point melting See section Breaker Tool Failure.

Tool tip edge crack

Pulsation of pressure line hose Diaphragm crack

Irregular blows at the beginning of breaker operation Seizure of piston and cylinder Replace diaphragm. Check if the breaker has made frequent blank fires. Inspect cylinder, piston seal condition. Check if contaminated or not. Remove seizing marks. Replace cylinder and piston if necessary.

Low blow speed Insufficient power (P x Q) Check power (P x Q)

Weak striking force Insufficient power (P x Q) Check power (P x Q)

B) Oil leakage

Oil leakage do not always require any part replacing. Check below before calling the breaker supplier.

Symptom Cause & Remedy

Leakage between tool and lower bush

Leakage between cylinder & back head Light oil leakage Leave it as it is. Keep using breaker as it helps lubrication.

Heavy oil leakage Seals at the cylinder bottom might have been damaged. Inspect/replace the complete seal set.

Leakage from control valve or Ro-plug Damaged or missing O-ring during breaker overhauling. Check/replace O-ring.

Oil entering into back head gas chamber

Remove oil. Check/replace gas seal and step seal. Also ensure that you check if piston or cylinder has got any scratch. Oil leakage Loosed through bolts & nuts : Retighten