Crawler DTH drilling rigs are widely used in open-pit mining, blasting engineering, slope anchoring and rock construction. The equipment usually operates under harsh conditions with heavy dust and uneven terrain. Standardized daily maintenance and timely troubleshooting can effectively extend machine service life, reduce downtime losses and guarantee construction progress.

Based on years of experience in rig manufacturing and global after-sales service, XINGDA sorts out typical faults, solutions and standardized maintenance guidelines for crawler DTH drilling rigs for your reference.

• Common Faults, Causes & Solutions

1. Weak feed force & low drilling speed

Causes:  Insufficient or deteriorated hydraulic oil, blocked filter elements; worn cylinder seals and pipeline leakage; worn DTH hammer leading to low impact energy; severely worn drill bits or blocked slag discharge channel.

Solutions:  Check oil level and quality, replace hydraulic oil and filters on schedule; repair cylinder seals and pipe joints; overhaul DTH hammer; replace worn drill bits and clear rock debris regularly.

2. DTH hammer fails to work or weak impact force

Causes:  Insufficient air supply pressure from air compressor, air pipe leakage; worn internal hammer parts or blocked air filter; poor lubrication causing internal jamming.

Solutions:  Adjust air compressor pressure and check air tightness; disassemble, clean and maintain DTH hammer; ensure continuous lubrication for pneumatic system.

3. Travel malfunction: crawler deviation, weak traveling, track derailment

Causes:  Uneven track tension; internal leakage of travel motor and worn reducer gears; stones and dirt stuck in walking components, worn track rollers.

Solutions: Adjust track tension evenly; repair travel hydraulic motor and reducer; clean debris on walking system daily and replace worn spare parts.

4. Overheating of hydraulic system

Causes:  Dust blocked hydraulic radiator; improper or aged hydraulic oil; long-term overloaded operation.

Solutions:  Clean radiator frequently; adopt manufacturer-specified hydraulic oil; avoid continuous overload work.

5. Poor performance of dust removal system

Causes:  Damaged or blocked dust removal hoses, faulty exhaust fan.

Solutions:  Inspect pipeline integrity, clean rock powder and maintain fan assembly.

• Standard Daily Maintenance Schedule

Pre-shift Inspection (Every Day)

1. Check level of hydraulic oil, diesel fuel and grease; inspect oil leakage.
2. Check all hydraulic hoses and air pipes for damage and loose connections.
3. Clean dust on radiator and dust removal system.
4. Inspect track tension, wear condition of drill bit and drill rod.
5. Carry out no-load test run, check abnormal noise during hammering, feeding and traveling.

Post-shift Maintenance (After Every Working Shift)

1. Park rig on flat ground and retract drill boom.
2. Clean rock dust and gravel on machine body and walking mechanism.
3. Tighten key bolts on drill boom and rotary head.
4. Drain water from pneumatic pipeline in winter to prevent freezing.

Periodic Maintenance

1. 50 Working Hours: Grease all lubrication points; clean oil suction filter.
2. 250 Working Hours: Replace air filter and fuel filter; check all sealing parts.
3. 500 Working Hours: Replace hydraulic oil and hydraulic filters; inspect DTH hammer and replace vulnerable parts if needed.
4. 1000 Working Hours: Overhaul travel reducer and rotary unit; test overall hydraulic pressure parameters.

• Warm Reminder from XINGDA

Most breakdowns are caused by neglected maintenance. We recommend keeping maintenance records and follow service intervals strictly. Do not disassemble core components arbitrarily when complex failures occur. Welcome to contact XINGDA technical support team.

Hubei Xingda provides global customers with professional technical consultation, spare parts supply and on-site maintenance service, supporting safe and high-efficiency drilling operations worldwide.