Just like automotive cooling system maintenance processes, there are two ways of changing coolant on commercial vehicles: the gravity fill and the vacuum-type coolant refill. Using the gravity fill method is very common and it doesn't require any specialty tools. You'd only need buckets with pre-mixed coolant and the clean, wide open funnel, but this method needs a time-consuming air bleeding, or de-aerating if you want to sound more sophisticated. The regular air bleeding on commercial trucks takes slightly longer than automotives, about 45 minutes because of (1) larger capacities in the truck cooling system and (2) longer coolant lines as well as multiple circuits such as EGR cooler and oil cooler. 
Failure to perform air bleeding creates air pockets in various places in the truck cooling system and lead to overheating, poor cab heater performance, air locks at the water pump, and possibly fault codes on electronically monitored systems (EGR temp, coolant temp spikes). Therefore, using the vacuum-type coolant refill tool not only reduces coolant change time, but also reduces much anxiety on above mentioned problems. Once everything is well prepared, that is, adequate volume of pre-mixed coolant and an air compressor, using vacuum-type coolant refiller reduce coolant changing time down to less than 10 minutes. 
This coolant refill tool designed by Kingtool is very compact. First you want to find a suitable adapter, shown below, to connect to the surge tank, after draining the old coolant. Connect the refill tool to the adapter, and attach air compressor to the refill tool. Slide the tab to the "Vacuum" side and the vacuum will gradually be created in the cooling system. On the other end, connect the hose provided and make sure the filter end is constantly submerged under the surface level of the new and pre-mixed coolant. Once the gauge shows about -0.8 bar, slide the tab to "Fill" side, and the new coolant will be introduced to the cooling system instantly. Finally just wait for the gauge to read 0 and check the coolant level. Top it up manually if there's still a bit remaining level left.   




We has been investing in much time and resources on developing this truck cooling system service tool set, specifically on researching the coolant cap adapter applications. There are some truck-oriented cooling system service tool sets on the market, but they are either outdated (been existing since the past 30 years) or market-limited (only for trucks in the US). So We are trying to provide a solution to provide commercial vehicle cooling system cap adapters for the most recent car makes and models and to cover both American and European truck manufacturers and different models. The table below shows an example of the applications from the 9 adapters included in this kit. Of course more applications are possible, and feel free to contact us for more details. 
 

Make	Model	Years	Adapters
DAF	CF 65, 75, 85	2001-2013	D & G
DAF	CF 12.9L	2013-2024	A & D
DAF	XG 10.8L, 12.9L	2021-2025	D
Ford	F-750 5.9L, 6.7L, 7.2L	2004-2015	6
Freightliner	Century Class 10.3L, 14.6L	2004-2010	C
Freightliner	M2 106, 112	2008-2019	C
International	LoneStar 14.9L, 15.2L	2010-2021	6
International	HX Series 9.0L, 12.4L	2020-2022	6
Iveco	S-Way 11.1L, 12.9L	2019-2024	D
Iveco	Trakker 7.8L, 12.9L	2004-2021	A
Kenworth	T660 11.9L, 14.9L	2008-2019	3
Kenworth	W900 8.8L, 10.8L, 15.8L	2008-2022	A
Mack	Athem MP7, MP8	2018-2025	A
MAN	TGL 4.6L, 6.9L	2005-2022	A
MAN	TGX 10.5L, 12.4L, 16.2L	2007-2021	A
Mercedes-Benz	Actros MP4, MP5	2011-2025	A
Mercedes-Benz	Antos	2012-2025	A
Peterbilt	365 11.9L, 12.9L	2008-2022	A
Renault Trucks	D-Series 7.7L	2013-2025	A & B
Renault Trucks	K-Series	2013-2025	F
Renault Trucks	Magnum	1990-2013	G
Scania	P, G, R, T - series	2003-2017	D & H
Volvo Trucks	FE 7.1L, 8.8L	2012-2025	A & B
Volvo Trucks	FMX 420, 460, 500	2012-2020	F
Volvo Trucks	VN 300, 610, 770	2000-2024	A

Q&A
Q1. Which commercial vehicle brands are compatible with this vacuum refill tool set?
A: The kit includes 9 adapters that fit a wide range of American and European trucks, such as DAF, Iveco, Scania, Volvo, Mercedes-Benz, Freightliner, Kenworth, and International models.
Q2. When should I avoid opening the coolant cap?
A: Never open the coolant cap when the engine or cooling system is still hot. High temperature and pressure may cause steam to spray out and lead to injury or system damage.
Q3. What is the difference between gravity fill and vacuum-type coolant refill?
A: Gravity filling requires long air bleeding (around 45 minutes) and may trap air inside the system. A vacuum refill removes air first and fills the coolant in under 10 minutes, resulting in a more efficient and safer process.
Q4. Can this tool set be used for cooling system leak testing?
A: Yes. The pneumatic pressure tool in the kit can pressurize the cooling system (when cold) to check for leaks.
Q5. What should I prepare before using the vacuum refill tool?
A: Prepare pre-mixed coolant, an air compressor, the correct adapter, and ensure the suction filter remains fully submerged in the coolant during operation.
 

	TRUCK Cooling System Test Kit
Item No.	KA-7273	KA-7273B
Pump	Manual	Pneumatic
Vacuum	NO	Yes, Pneumatic
Adaptor	7 pcs	9 pcs
Difference	KA-7273 is not for current larger Trucks	KA-7273B services the newer and current model Trucks (Also the old ones)
	KA-7273 is for old model trucks	KA-7273B is pneumatic, so it saves time and labor to test the pressure
		KA-7273B includes a Vacuum Refill Tool to make KA-7273B the most complete kit on the market.
	Comparison the water tank between cars and trucks. Truck water tanks is 10 times larger than cars