Proactive Maintenance Schedule Prevents Jetter Failure

A proactive maintenance routine helps prevent equipment failures.
Proactive Maintenance Schedule Prevents Jetter Failure
A jetter is attached to a truck ready to be used by the Barwon Water Department in Australia. There are several components to a jetter that should be checked often for signs of wear and tear, including the hose, water filter and tires.

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You’re out in the field using your jetter on a job when suddenly you experience a problem. Perhaps you’ve fallen behind on the engine maintenance schedule and that component breaks down. Maybe the high-pressure water running through a worn hose causes it to rupture. Or the unit continues to function, but not at the pressure level needed to get the job done.

To ensure your jetter doesn’t cost you downtime and remains a reliable piece of equipment over the long term, there are several maintenance practices that contractors should follow regularly.

“The main thing to do on a daily basis is check the oil in the engine and the pump, make sure it’s up to marks,” says Nick Woodhead, president of US Jetting.

Other items that are important to monitor daily include the hose, water filter and tires if the jetting unit is on a trailer.

“The filter is a key part of the jetting package,” Woodhead says. “If you want it working properly, you need to have a clean filter. What people should do is have a check list so you know you’ve done it all when you send [the jetter] off.”

Getting on a schedule

Often the way the machine is functioning will be the sign that there’s a problem with a component. Woodhead says the 500-hour mark is a good time to carefully inspect the pump and valves if operators want to catch any issues in advance. Otherwise 1,000 hours of use is typically the time when valves and packings need to be replaced.

“They usually will tell you when something’s wrong. There will be a hammering. Generally speaking, people will run the equipment until there’s a problem,” Woodhead says. “It’s kind of like a car. There are some things that you do at a certain point anyway, whether there’s a problem or not, so you’re not breaking down somewhere.”

He says jetter users might have to re-torque pump head bolts occasionally if a pump valve is failing prematurely.

Chester Axley, national products director for Power Line Industries, says simply following the manufacturer’s recommended service schedule is the best way to maintain machine components that don’t require daily attention.

“You’ll have a service on the motor, a service on the pump. If it’s a hot-water unit, you’re going to have a service on a burner,” Axley says. “And the guy servicing it should be running it, like we do here. We have a piece of pipe that we stick the hose down and we turn the machine on and watch it work. Now we’re looking for leaks at joints. We’re looking at hoses. Are there any bulges? Is the pump leaking any water? This will stave off getting to the job site and pow, you’ve got a problem.”

He says with Power Line’s jetting units, for example, the recommended service schedule includes changing engine oil every 50 hours, and changing engine filters and checking spark plugs every 80 hours. The pump oil only has to be changed every 400 hours, but if there’s a problem it can be headed off during the 50- or 80-hour service.

“Check the pump to make sure the oil isn’t turning milky or looking white,” Axley says. “That’s telling you water is seeping back behind the head of the pump, which is telling you that water seals are wearing out.”

Backup parts on hand

No matter how strictly jetter users adhere to a regular maintenance schedule, there are components that will eventually need to be replaced. Axley recommends operators keep some backup parts on hand in case there is a problem with the jetter while out on a job.

“If you have what I call a care package on the shelf or in a truck and you have a problem in the field, you’re going to be able to finish the job,” he says.

That care package should include a high-pressure ball valve, an unloader valve, a safety release valve and, if it’s a hot-water unit, a thermostat and pressure switch.

“Those are probably the most wearable items. They do break and they do fail,” Axley says.

Loss of pressure is a strong indicator that a component needs to be replaced.

“Eventually, the nozzles will wear. If it’s not coming up to pressure, it’s a good sign that’s worn out,” Woodhead says. “The unloader valve, those can go bad. The seat can wear out, dumping water all the time — basically, not getting pressure. If you know what pressure you get with a certain tool and it’s not coming up to pressure, check to make sure it’s not dumping water.”

The lead

Woodhead says the jetting component most vulnerable to wear if not taken care of is the hose. He recommends using a tiger tail, or any sort of guide, to protect the hose from items that may puncture it.

Eric Bragg of Bragg Excavating in Marion, Ind., says his company uses a pipe or sleeve at the point where the jetter hose is entering to protect it as much as possible. He says they also add a lead to the hose.

“Most of the problems will be on the lead, not the actual hose itself,” Bragg says. “We run a 17-foot lead off the end of our hose. Then you can just take the lead off and replace that instead of having to replace 300 feet of hose.”

Proper training

Also factoring into jetter maintenance is the training of the equipment operators. How an operator is running the equipment can be the difference between a wearable component like the hose lasting for five minutes or 1,000 hours, says Woodhead.

“Training the operators properly is important because, invariably, if they’re not properly trained you’re going to have problems with the equipment. They do what they see their buddies doing, so you also have to think about who’s training the trainer.”



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