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The Role of Pin Presses in Undercarriage Maintenance
Excavator track pins are critical components that link the track chain together, allowing the machine to move across terrain. Over time, these pins wear out or seize, requiring removal and replacement. A pin press is a hydraulic tool designed to push these pins out of the track links with controlled force, minimizing damage and operator fatigue. While essential for large machines, their use in mid-size excavators—especially those under 25 tons—remains a topic of debate among mechanics and contractors.
Terminology Notes
In Australia, contractors working on 20–25 ton machines often face a dilemma: invest in a portable pin press or rely on manual methods. Portable presses offer convenience for field repairs but are heavy, costly, and time-consuming to set up. Shop-based presses, while more powerful and stable, require transporting the machine or track chain to a facility.
One mechanic in Victoria received a quote of AUD $6,500 for a portable press—excluding the hydraulic pump. He had previously paid AUD $1,200 for a technician to travel and perform the job, highlighting the scarcity of local service providers. The high cost and limited availability push many operators to consider alternatives.
Manual Methods and Veteran Wisdom
Experienced mechanics often favor manual removal using sledges and drifts. A 28-pound hammer, combined with a custom drift holder, can remove pins effectively on machines up to 25 tons. Heating the link opposite the pin with a torch softens the metal, reducing resistance. Some operators even use liquid nitrogen to shrink pins before removal, though this method raises safety concerns.
A retired service manager in Scotland shared that he avoided presses for machines under 40 tons, preferring a big hammer and torch. He emphasized that while presses are precise, they rarely save time in field conditions. His approach was echoed by younger mechanics who learned from veterans and found manual methods faster and more adaptable.
Designing a Safer Drift Holder
One recurring suggestion is the creation of a robust drift holder that clamps to the track pad. This device would stabilize the drift, reduce operator fatigue, and improve safety by minimizing flying debris. A curved handle welded to the drift allows one person to hold it while another swings the hammer. Though simple, this innovation can transform a two-person job into a more efficient and safer process.
Commercial Press Options and Global Suppliers
While some Australian contractors prefer local suppliers, others explore international options. Companies in the U.S. and Europe offer track presses ranging from 50 to 100 tons of force. Brands like WTC Machinery and HEMS Ltd provide both shop and portable models, though shipping and support can be challenging. Italian manufacturers like Big Nozzi are praised for quality but may be difficult to source in remote regions.
Cost-Benefit Analysis and Usage Frequency
The decision to buy a pin press depends heavily on usage frequency. For contractors who split chains monthly, the investment may be justified. For occasional jobs, manual methods are more economical. One operator calculated that the cost of hiring a technician for six jobs matched the price of a press, prompting him to consider purchasing. However, others argue that the time and effort to set up the press often outweigh its benefits.
Anecdote from the Field
In Ontario, a farmer and excavating contractor shared a story of removing a pin from his 240 excavator. It took three people: one on the hammer, one holding the drift, and one heating the link. The mechanic took a sledge handle to the ribs during the process, prompting laughter and a vow to build a better drift holder. Despite the struggle, the job was completed without a press, reinforcing the value of teamwork and improvisation.
Recommendations for Mid-Size Excavator Pin Removal
In Australia and beyond, the debate over excavator pin presses reflects a broader tension between tradition and technology. While hydraulic presses offer precision, their cost, weight, and setup time make them impractical for many field jobs. Veteran mechanics continue to rely on sledgehammers, torches, and ingenuity—proving that sometimes, the old ways still work best. For contractors weighing the investment, the key is frequency, safety, and the willingness to swing a hammer when needed.
Excavator track pins are critical components that link the track chain together, allowing the machine to move across terrain. Over time, these pins wear out or seize, requiring removal and replacement. A pin press is a hydraulic tool designed to push these pins out of the track links with controlled force, minimizing damage and operator fatigue. While essential for large machines, their use in mid-size excavators—especially those under 25 tons—remains a topic of debate among mechanics and contractors.
Terminology Notes
- Track Pin: A cylindrical steel rod that connects track links in an excavator’s undercarriage.
- Master Pin: A removable pin used to split the track chain for maintenance.
- Pin Press: A hydraulic or mechanical device used to remove or install track pins.
- Drift: A steel punch used manually to drive out pins with a hammer.
- Pepperpot Heater: A torch or heating device used to expand metal and ease pin removal.
In Australia, contractors working on 20–25 ton machines often face a dilemma: invest in a portable pin press or rely on manual methods. Portable presses offer convenience for field repairs but are heavy, costly, and time-consuming to set up. Shop-based presses, while more powerful and stable, require transporting the machine or track chain to a facility.
One mechanic in Victoria received a quote of AUD $6,500 for a portable press—excluding the hydraulic pump. He had previously paid AUD $1,200 for a technician to travel and perform the job, highlighting the scarcity of local service providers. The high cost and limited availability push many operators to consider alternatives.
Manual Methods and Veteran Wisdom
Experienced mechanics often favor manual removal using sledges and drifts. A 28-pound hammer, combined with a custom drift holder, can remove pins effectively on machines up to 25 tons. Heating the link opposite the pin with a torch softens the metal, reducing resistance. Some operators even use liquid nitrogen to shrink pins before removal, though this method raises safety concerns.
A retired service manager in Scotland shared that he avoided presses for machines under 40 tons, preferring a big hammer and torch. He emphasized that while presses are precise, they rarely save time in field conditions. His approach was echoed by younger mechanics who learned from veterans and found manual methods faster and more adaptable.
Designing a Safer Drift Holder
One recurring suggestion is the creation of a robust drift holder that clamps to the track pad. This device would stabilize the drift, reduce operator fatigue, and improve safety by minimizing flying debris. A curved handle welded to the drift allows one person to hold it while another swings the hammer. Though simple, this innovation can transform a two-person job into a more efficient and safer process.
Commercial Press Options and Global Suppliers
While some Australian contractors prefer local suppliers, others explore international options. Companies in the U.S. and Europe offer track presses ranging from 50 to 100 tons of force. Brands like WTC Machinery and HEMS Ltd provide both shop and portable models, though shipping and support can be challenging. Italian manufacturers like Big Nozzi are praised for quality but may be difficult to source in remote regions.
Cost-Benefit Analysis and Usage Frequency
The decision to buy a pin press depends heavily on usage frequency. For contractors who split chains monthly, the investment may be justified. For occasional jobs, manual methods are more economical. One operator calculated that the cost of hiring a technician for six jobs matched the price of a press, prompting him to consider purchasing. However, others argue that the time and effort to set up the press often outweigh its benefits.
Anecdote from the Field
In Ontario, a farmer and excavating contractor shared a story of removing a pin from his 240 excavator. It took three people: one on the hammer, one holding the drift, and one heating the link. The mechanic took a sledge handle to the ribs during the process, prompting laughter and a vow to build a better drift holder. Despite the struggle, the job was completed without a press, reinforcing the value of teamwork and improvisation.
Recommendations for Mid-Size Excavator Pin Removal
- Use a 28 lb sledge and a curved-handle drift for manual removal
- Heat the opposite link with a torch to ease pin movement
- Consider building a clamp-on drift holder for safety and efficiency
- Reserve portable presses for machines over 30 tons or high-volume operations
- Apply dielectric grease to connectors if using hydraulic tools in wet conditions
In Australia and beyond, the debate over excavator pin presses reflects a broader tension between tradition and technology. While hydraulic presses offer precision, their cost, weight, and setup time make them impractical for many field jobs. Veteran mechanics continue to rely on sledgehammers, torches, and ingenuity—proving that sometimes, the old ways still work best. For contractors weighing the investment, the key is frequency, safety, and the willingness to swing a hammer when needed.
