DTH Hammer

WC series DTH hammer, adopting valveless structure and with low air consumption, can be used on various drill rods and drilling rigs. It can be widely applied in core (sample) exploration of mineral geology, hydrogeology and engineering geology.

• Clean all spare parts thoroughly with clean diesel oil.
• Check the nicks, burrs and cracks on piston surface, polish with sandpaper or replace it.
• Check the nicks, burrs and cracks on inner cylinder and inner hole of bushing, polish with sandpaper or replace them.
• Check the cracks and abrasions of spline sleeve. Install the spline sleeve on a new drill bit for torsion test and replace it if the loosening is more than 5mm.
• Check the nicks, burrs and cracks on cylinder base and core tube. Polish irregular shapes and replace them if necessary.
• Check the cutting transverse seam and cracks of O shaped sealing ring, replace it if necessary.
• Check the abrasions and damages of upper check valve. Check whether the check valve can slide freely around the cylinder base and core tube and check the sealing performance with upper joint.
• Measure the fit clearance between inner hole of piston and the top of core tube. If the fit clearance is more than 0.35mm, measure again with a new piston. If the fit clearance is still more than 0.35mm, replace core tube to meet requirements.
• Measure the fit clearance between piston and inner cylinder. If the clearance is more than 0.2mm, measure again with a new piston. If the clearance is still more than 0.2mm, replace parts to meet requirements.