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VF-2 main coolant line 15 foot

draganm

Aluminum
Joined
Aug 6, 2007
Location
colorado
my 2012 VF2 finally went down after 10 years of regular but light use, probably less than 8 hours a day on average. Main coolant line cracked and drained back towards the tank and onto the floor. This is not trivial, dam thing snakes all the way thru the machine, over the electronics cabinet, and down the cable track and into the milling head.

I thought i would just save time and buy the kit from HAAS, was told this is a typical issue (mine is the standard low pressure system). The kit was $125. , comes with 15 feet of 5/8" ID Polyurethane hose , and although it's labeled .083" wall it actually measures about 1/8" wall(.865 OD).

Original was 3/4" ID and looks like PVC, after 10 years the PVC hose was hard as a rock.

The kit wasn't really right. It comes with a slew of fittings and the kit is called "universal", but it isn't. The female fittings it came with fit the tank end, which was a really weird 1.062" x 11-1/2 TPI pitch, I think it's actually a 3/4" GHT fitting (garden hose standard). The other measured 1.0" x 14.0 TPI , which is a standard 3/4" male NPT. This is an angled fitting deep inside the cavity of the milling head. I had to buy the fitting from Mcmaster Carr for $11.30 + shipping. Keep in mind you need a fitting that swivels so you don't twist the hose when you screw it down.

Still, the HAAS kit isn't bad deal, the hose itself sell for $6.50 a foot, but basically, check both ends of your machine and see what you need. I think they used different hose and different fittings as the years went by. Here are some pics, hope this helps somebody. I lowered my head all the way down and powered down, flipped main breaker off

unscrew front cover, 2 screws on left, a bunch more on the right, and a number on top. Carefully slide cover up, flex right side out to clear a bracket. prop with a 12.0" piece of wood
HAAS cooolant hose repair (1).jpg
old PVC versus new Polyurethane
HAAS coolant 7.jpg
Cavity in milling head where the hose attaches
HAAS cooolant hose repair (2).jpg
hose running thru cable way. Make sure you slip the corrugated tubing back over the new hose, this kept the coolant from flooding my electronics cabinet when hose inside broke.
HAAS cooolant hose repair (3).jpg
pic showing the fitting removed from inside the milling head, the fitting i bought, (top left), and the fittings HAAS sent (top right). I removed it to be 100% sure of the type and size
HAAS cooolant hose repair (6).jpg

The correct fitting for inside the mill head. I cut the barbed section down 2 or 3 barbs as it look too long and didn't want to strain the hose.
Object moved
Last but not least, i used the pinch style clamps that came with the kit, you will need the special pliers. It's very tight going down the cavity in the milling had, and i didn't want a big screw style hose clamp getting stuck or rubbing on other lines with sharp edges.
HOSE, COOLANT 5/8 ID X 14 FT UNIVERSAL KIT | Hoses | Standard Coolant | Coolant Systems | Find Replacement Parts | Haas Parts | Genuine OEM Haas Automation(R) Parts Factory-Direct
 
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Stirling

Cast Iron
Joined
Dec 11, 2013
Location
Alberta canada
your cable chain looks like its got lots of space, mine was so dam tightly packed with cables all twisted wround themselves tugging with movment, was a failgure waiting to happen. had to dissconnect everything and re-route it all, was not impressed
 

kustomizer

Titanium
Joined
Aug 17, 2007
Location
North Fork Idaho
I just got to do that a couple of weeks ago, mine have 3/4 vinyl hose from the factory and I replace them with 5/8 vinyl from the hardware store. I bought a 50 foot roll and it was 2 bucks a foot, it seems between 7 machines I get to do it about once a year.
Big Fun!
 

draganm

Aluminum
Joined
Aug 6, 2007
Location
colorado
I just got to do that a couple of weeks ago, mine have 3/4 vinyl hose from the factory and I replace them with 5/8 vinyl from the hardware store. I bought a 50 foot roll and it was 2 bucks a foot, it seems between 7 machines I get to do it about once a year.
Big Fun!
hopefully the polyurethane lasts another 10+ years for me on this VF2, which is longer than I'll be here. If i had to do this every year I'd go nuts
 








 
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