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If it’s time to change recirc air filters in your cab, go a little further and check the evaporator for caked-on dirt that can hamper its performance.
During normal operation, the evaporator picks up moisture from the air which condenses on the fins as water droplets before draining out of the system. This dehumidification action helps make the operator feel more comfortable in the cab.
Big cabs, lots of glass, extended downtime, and firefighters in heavy gear make fire and rescue a demanding HVAC application and a good opportunity for service and parts sales.
A division of Oshkosh Truck Corp., Pierce has a full line of pumpers, tankers, rescues, aerials, and other emergency vehicles. We’re the standard HVAC system supplier for the Dash, Lance, Quantum, Saber, and Enforcer models. These use the R-2510 front evaporator and R-9715 rear evaporator, R-3500 heater, and R-4500 condenser.
This is what can happen when you charge the A/C system on on the suction side and liquid gets into it: you blow the top right off the compressor. It's usually a mistake made by a technician not certified to work on A/C.
Your 134a recovery/recycling/recharging equipment will last a long time if it’s properly maintained and calibrated. Here are two steps you can take to improve its service life:
There are two ways to measure heat: intensity and quantity. Here's how to tell the difference:
Heat intensity describes how hot something is, measured in Fahrenheit or Celsius. Heat quantity describes a specific amount of heat and is measured in British thermal units or BTUs. By definition, one BTU is how much heat is required to raise one pound of water 1 degree F.
Want to improve uptime and reduce repair costs? Follow Red Dot’s preventive maintenance schedule for heavy-duty mobile HVAC systems.
We’re excited to introduce Scott Dueringer and Charles Wilkes as regional sales managers for our aftermarket business.
You may already know Scott or Charles: they both bring tremendous experience in heavy-duty parts sales and distribution to Red Dot.
Scott is located in Phoenix and will provide sales and field support to Red Dot’s network of aftermarket distributors in the Western U.S. He comes to Red Dot from the aftermarket division at Meritor, where he was a district sales manager responsible for parts sales to OEM dealers and independent distributors.
Can you fix an air conditioner without finding and correcting the cause of the problem? You bet! Happens every day.
Should you fix an air conditioner without finding and correcting the cause of the problem? Well, let’s talk about that.
Say a truck pulls into your shop and the operator asks to have his rig serviced in a hurry. He tells you the air conditioner isn’t cooling like it should and dashes into the restaurant for lunch.
When an A/C system isn’t cooling like you expect, you may have refrigerant leak. How can you tell? A visual inspection is a good first step. There are obvious places to look:
1. Compressor shaft seal: The shaft and seal are hidden behind the clutch assembly, but centrifugal force will throw the oil off the shaft and against the engine, bracket, or whatever is close. Check these points for oil and grime when you examine the compressor clutch and mounting bracket.
If the A/C in your car conks out, you’re merely uncomfortable for a while. But on a haul truck or harvester, the operator may have to shut down the vehicle.
We developed the ProTecht system to reduce the risk of unplanned downtime because of an A/C system failure. It’s a compact electronic control unit that monitors high-side system pressures, compressor clutch cycles, voltage, refrigerant charge, condenser fan operation, and other performance indicators and prevents the clutch from engaging if it detects conditions that can lead to a compressor failure.
There are many reasons why a compressor can fail, including inadequate voltage to the clutch coil, loss of refrigerant charge, and contamination.
However, we also see compressors returned that are fully functional.
Before you pull the compressor from the vehicle and file a warranty claim, take these four steps to confirm that it really is a goner:
1. Is the compressor rotation smooth?
2. Is the coil receiving more than 11.5 volts?
3. Is the coil resistance between 2.8 and 4.4 ohms?
We're excited to tell you about Jeff Sybil, the newest member of our OEM sales team.
Oil color can tell you a lot about the overall condition of your vehicle's A/C compressor and other components. Here's what to look for:
If your truck heater has a water valve, you probably didn’t activate it very often during the summer months. Now that it's cooler, you want to turn up the heat.
Trouble is, after a season of disuse, the valve can stick and affect your ability to control the temperature in the cab.
Gary Hansen was in Phoenix last month at the 2011 SAE Alternate Refrigerant and System Efficiency Symposium. His report?
“Low GWP-refrigerant supply and pricing are top-of-mind for engineers and suppliers working on 2013-model-year vehicles, but those issues will get worked out,” Gary says. ”Shops and A/C technicians should be getting ready now in order to prevent the same types of contamination issues the industry experienced during the transition from R-12 to R-134a.
We didn’t design our R-9757 to prop up an overturned Cat scraper, but this machine’s owner said the unit’s stout construction kept it from rolling further onto the cab. Installed by Badger Truck Refrigeration just a week before, the unit kept right on running once the scraper was back on its wheels.
JBAR units are a great fit for the Red Dot family. That’s by design, says Mike Pease, who manages the JBAR business for Red Dot.
Mike owned JBAR A/C from 2001 until it was acquired by Red Dot last August.
“We developed JBAR heating and air conditioning units to match the performance and durability that Red Dot is known for,” Mike says, “but with a size, capacity, mounting location, or some other feature that would make JBAR units stand out.”
We’ve made a major update to the cross-reference section of the dealer log-in area at reddotcorp.com, adding new suppliers and hundreds of new part numbers.
The online part number cross-reference section has the most comprehensive and up-to-date listing of Red Dot numbers, and now includes additional part numbers for JBAR, Blue Bird, Carrier, PACCAR, and Parker products.
If you need HVAC parts or units, talk to your Red Dot distributor.
Yard trucks, mules, shunt trucks—no matter what you call them, Kalmar-Ottawa terminal tractors are made for productivity and comfort. Now Red Dot is part of that mix.
Our R-3310 under-dash HVAC unit is a drop-in aftermarket replacement for the existing HVAC on 1998 to 2010 Kalmar YT-30 yard tractors. It delivers 17,000 BTU/Hr for cooling and 25,000 BTU/Hr for heat, and at 290 CFM, the R-3310 produces a 25% increase in airflow over the unit it's designed to replace.
It’s a question we’ve all heard a lot this summer. No matter where you turn, the supply of Sanden compressors has been tight. It’s been a frustrating time.
Not that you care. Your truck or machine needs an A/C compressor. So how can we help?
If your Red Dot distributor doesn’t have the Sanden compressor you need, the best next step is to see if we have a comparable compressor from QUE. We’ve stocked QUE compressors for years (QUE is a partner of T/CCI). It’s a quality all-makes product line.
Muscling off a corroded hose fitting can be a pain, but how do you get penetrating oil to the threads? Before you cut away that stuck fitting, try this approach.