580 Super L door seals

By Chris Tyson, MACS HD Technical Contributor
We have an older Case backhoe at our shop that definitely sees its fair share of use out on job sites. In fact, I was operating this machine a few weeks ago when I noticed the HVAC system was performing rather poorly.

Image 1 - IMG_20141124_093105
Our BH-2 Super L is one of our most often used job site workhorses.
I really noticed how bad it was once the weather started to get cold here in Pennsylvania. I was digging out a trench and had the controls set to high temp and high blower speed. Everything seemed fine while I was operating the machine and actually doing the dig. But when I would stop for a few minutes, the cabin seemed to get cold right away.

Image 2 - IMG_20141124_093156
The door seal on this backhoe is crushed and deteriorated.
At first it seemed like the heater was just not putting out enough heat, but even at idle the fan was blowing strong and the air was hot. But while I was looking around the cabin, I noticed something at the bottom of the door.

Image 3 - IMG_20141124_093226
The gap around this door is so large you can see right down to the ground.

Image 4 - IMG_20141124_093421
One of our suppliers carries lengths of an extra large, “D-shaped” weather stripping seal.

Image 5 - IMG_20141124_131954
Additional weather strip helps keep out the cold (and keep in the heat).

Image 6 - IMG_20141124_132029
Special adhesive sealant is required for proper installation.
Have a similar story you’d like to share with MACS? Drop a line to steve@macsw.org and let us know!

If you’re a service professional and not a MACS member yet, you should be! Become a member and receive a technical newsletter with information like what you’ve just read in this blog post visit http://bit.ly/10zvMYg for more information.
You can E-mail us at macsworldwide@macsw.org . To locate a Mobile Air Conditioning Society member repair shop in your area. Click here to find out more about your car’s mobile A/C and engine cooling system.
Mobile A/C professionals should plan to attend 35th annual Mobile Air Conditioning Society (MACS) Worldwide Training Conference and Trade Show, Meet me at MACS Make Connections that Matter, February 5-7, 2015 at the Caribe Royale, Orlando, FL.


About macsworldwide

Mobile Air Conditioning Society (MACS) Worldwide Founded in 1981, MACS is the leading non-profit trade association for the mobile air conditioning, heating and engine cooling system segment of the automotive aftermarket. Since 1991, MACS has assisted more than 600,000 technicians to comply with the 1990 U.S. EPA Clean Air Act requirements for certification in refrigerant recovery and recycling to protect the environment. The Mobile Air Conditioning Society (MACS) Worldwide’s mission is clear and focused--as the recognized global authority on mobile air conditioning and heat transfer industry issues. www.macsw.org
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