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公共汽车

AEM Update: Snap application for off-highway R-1234yf

2021年9月22日

MACS will have a variety of heavy-duty and off-road presenters beginning at 8 am on Thursday, 9月30日.  One will be AEM Update: Snap application for Off-highway R-1234yf
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Behavioral characteristics of various compressor types

2021年9月21日

When faced with a challenging A/C system problem, knowing what type of compressor you are dealing with can help streamline the diagnosis process. 
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Cooling fan circuit analytics

2021年9月16日

What is Peter Orlando’s class Cooling Fan Circuit Analytics about? It all began decades ago as a mechanical fan attached to the water pump with and without a fan clutch.  And now it has evolved into an efficient complex electrical motor control of cooling the modern internal combustion engine.
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A burned clutch is a symptom of another problem

2021年9月14日

Not much thought is given to compressor clutches until they fail, but they are extremely durable.  I have personally owned three vehicles that had between 200, 000 and 240,000 miles on them.  They all still had the original compressors and clutches, and they were still functioning perfectly.
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Facts to know about the compressor clutch coil

2021年9月7日

Checking the clutch air gap before installing a compressor is an important step in compressor installation. This is because of the possibility of a clutch air gap getting knocked out of adjustment due to rough handling or it being gapped incorrectly at the factory.  These issues of course can cause problems with clutch operation.  If detected and corrected before compressor installation, a lot of time can be saved.
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回到校车空调

2021年9月1日

Since it’s September (and another school year is upon us), we’re going to look at what’s so different about school bus A/C as compared to the more common automotive-type systems.
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Mind the compressor clutch gap

2021年8月31日

One of the first things I was taught in my A/C training was to always check the clutch air gap prior to installing a compressor. 
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What type of condenser is in that vehicle?

2021年8月17日

What type of condenser is in that vehicle? It's a frequent question in the mobile A/C industry.
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Field study: Incorrectly installed condensers

2021年8月10日,

I have handled numerous tech calls involving older GM trucks with incorrectly installed condensers.  In preparation for this series of MACS blogs, I discovered a salvage truck with one of these condenser repairs.  This gave me the opportunity to duplicate the incorrect installation and look for pitfalls and solutions.
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找到正面朝上

2021年8月3日

Most condensers have different fittings on the inlet and outlet.  The locations of the inlet and outlet on most condensers will not allow lines to be connected incorrectly, even if the fittings do happen to be the same size.  Lastly, the designs of the mounts on most condensers prevent a unit from being installed upside down.  However, none of these characteristics apply to the condenser the technician had installed. 
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