Troubleshooting Guide - Doosan DCT2PS Manual Del Usuario

Trouble
Pickhammer will not start
Pickhammer loses power rapidly
Pickhammer lacks power
Cylinder overheating on new Pickhammer
Tool overheating after break–in
period
Erratic or sluggish operating
Freezing at exhaust ports
Fogging
MAINTENANCE SECTION

TROUBLESHOOTING GUIDE

Probable Cause
Plugged exhaust port or air passages caused
by dirt or hose particles
Stuck valve due to gummy oil or
incorrect assembly
Frozen piston due to improper
lubrication
Restriction in the air hose
Air hose too long
Air Hose diameter too small
Clogged Inlet Bushing screen
Low air supply pressure
Running on Fronthead cushion
Plugged air passages
Lack of lubricating oil
Clogged Inlet Bushing Screen
Tool not properly broken in
Running on Fronthead cushion
Piston not hitting shank because shank is
short
Pulling steel at full throttle
Lack of lubricant or improper lubricating oil
Lubricating oil too heavy, slowing down valve
action
Gummed oil or dirt in operating parts
Clogged Inlet Bushing screen
Excessive moisture in the air supply line
(Usually occurs in low ambient temperatures)
Excessive moisture in the air supply line
Over lubrication
SAVE THESE INSTRUCTIONS. DO NOT DESTROY.
Solution
Dismantle the Pickhammer and clean out all ports and air
passages. Keep the air hose in top notch condition; never use a
soft, deteriorated hose.
Remove and clean the valve chest parts. Never use dirty oil or
oil that does not conform to the recommended specifications.
Check for correct valve assembly procedures.
Repair the piston by placing in a high speed lathe and dressing
with fine emery cloth. Never run the Pickhammer without the
proper lubricating oil in the lubricator.
Never allow the air hose to kink or make sharp bends.
As a general rule, keep the air hose length under 15 m (49 ft).
Use a 13 mm (1/2") inside diameter air supply hose.
Clean the screen in the Inlet Bushing Assembly
The maximum air supply pressure at the tool should be 6.2 bar
(90 psig).
Keep shank fed–up to the work. Always maintain a constant
pressure when operating the Pickhammer.
Disassemble the Pickhammer and clean out all ports and
passages.
Maintain the proper oil level in the lubricator.
Steel shank must show a film of oil.
Clean the screen in the Inlet Bushing Assembly.
Stop operating the tool and perform initial servicing. Never run
a new Pickhammer at full throttle until a proper break–in period
has been completed.
Keep shank fed–up to the work. Always maintain a constant
pressure when operating the Pickhammer.
Remove the shank from the Pickhammer
Use minimum throttle when pulling steels away from work.
Before operating the Pickhammer, make sure the lubricating oil
reservoir is full of proper lubricant.
Use only the recommended lubricating oil.
Disassemble the tool and clean out dirt and gummy residue.
Service the Pickhammer with clean oil. Protect the tool from
dirt when idle.
Clean the screen in the Inlet Bushing Assembly.
Install moisture traps in the air supply line or add anti–freeze
lubricant directly through the air inlet. Use anti–freeze lubricant.
Clean out the air lines. IF moisture traps are installed in the air
supply line, drain the moisture.
Adjust the lubricator for the proper rate lubricant feed.
N OT IC E
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