When most people think about forklift maintenance during the summer, they picture a warehouse forklift working in a hot building. Maybe a battery needs more water. Maybe the engine runs a little warmer. But high-capacity forklifts live in an entirely different world.
These aren’t 5,000 lb warehouse trucks moving pallets down an aisle.
They’re handling:
And when summer temperatures climb, the challenges increase dramatically.
Over the years, I’ve found that many of the issues affecting high-capacity forklifts aren’t even on the radar of people who only work with standard material handling equipment. The combination of heat, load weight, long duty cycles, and harsh operating environments creates unique challenges that demand attention.
A standard forklift generates heat. A high-capacity forklift can generate a tremendous amount of heat.
Why?
Because everything is larger. Engines, transmissions, hydraulic and cooling systems; but most importantly, much heavier loads.
When you’re lifting 30,000 – 100,000 lbs. The stresses placed on the machine increase exponentially. Summer temperatures simply amplify those stresses.
One of the biggest differences between a standard forklift and a high-capacity forklift is the cooling package.
These machines often rely on large radiators, hydraulic oil coolers, transmission coolers & charge air coolers all working together.
The challenge that many high-capacity forklifts operate outdoors.
That means cooling systems are exposed to dust, dirt, debris, residue and other contaminants. Over time, cooling efficiency drops. And when ambient temperatures hit 90°F or higher, the margin for error becomes very small.
I’ve seen large forklifts run flawlessly in spring and fall. Then summer arrives, and suddenly their lift’s coolant temperatures climb, their hydraulic temperatures increas and their performance begins suffering
The machine didn’t change, the environment did.
Hydraulic systems are the lifeblood of a high-capacity forklift. They’re responsible for moving enormous loads safely and efficiently. But hydraulics create heat… a lot of heat actually.
As temperatures increase hydraulic oil thins, internal leakage increases and efficiency decreases. In severe situations you’re going to see your lift speeds slow, functions become sluggish and components experience accelerated wear.
Why does that matter? A hydraulic system lifting a 5,000 lb pallet and one lifting a 50,000 lb steel coil are operating under very different conditions. At higher capacities, hydraulic temperatures become a critical maintenance concern.
Many warehouse forklifts get periodic breaks throughout the day. High-capacity forklifts often don’t. Especially in plans where you have one machine to keep a large operation going. This is seen frequently in steel processing, port operations & heavy manufacturing.
That means components have less opportunity to cool between cycles. Heat builds, temperatures climb and maintenance becomes even more important.
Most people don’t think about tires until there’s a problem. But on high-capacity forklifts, tire temperatures can become significant. These machines place tremendous loads on their tires.
When operating on ground like asphalt or concrete during hot weather can cause wear you might not expect. As the surface temperature of the ground rises, tire temp increases as well. You end up with premature wear, increased chunking, extra tire degradation and overall reduced tire life.
Considering the cost of high-capacity tires, that’s not something operators want to ignore.
One topic that doesn’t get enough attention is operator comfort.
High-capacity forklifts often work outdoors in direct sunlight. And summer heat affects people just as much as machines. Your drivers can experience fatigue & dehydration which can lead to slower reaction times. When operators are handling loads weighing tens of thousands of pounds, focus becomes critical.
Whether you want to acknowledge it or not; comfort isn’t a luxury. It’s a safety issue.
I’ve said it before, and summer reinforces it every year: Preventative maintenance is always cheaper than downtime. Especially with high-capacity forklifts.
Before temperatures peak, operators and maintenance teams should inspect:
Small issues become major failures much faster when extreme heat enters the equation.
The higher the capacity, the smaller the margin for error. A minor cooling issue on a warehouse forklift may create an inconvenience. A cooling issue on a 70,000 lb forklift handling critical production material can create a major operational problem.
The scale changes everything.
Summer is tough on all forklifts. But high-capacity forklifts face challenges that most standard material handling equipment never encounters.
One thing I’ve learned from working around high-capacity equipment is this: Heat exposes weaknesses.
A partially clogged radiator. A worn hydraulic component. A neglected tire. A cooling system that’s barely keeping up.
Summer finds those weaknesses quickly and when you’re operating forklifts capable of lifting tens of thousands of pounds, reliability isn’t just about productivity. It’s about safety. That’s why the best high-capacity operations treat summer preparation as a critical part of their maintenance strategy, not an afterthought.
Special Note: If you’re still reading, like and share. It’s appreciated. At Forklift Exchange, we help customers determine whether new, used, refurbished, or rebuilt equipment makes the most sense for their application. If you’re planning a purchase and would like a second opinion, I’d be happy to discuss your options. Send me a message.
Jason Flaska Forklift Exchange 📞 630-842-0779 📧 jasonf@forkliftexchange.com
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