A number of us have used the following tool to remove the quick disconnects. I purchased my set at Pep Boys, others have bought theirs at Sears. The picture is shown here:
(Note: above picture courtesy of JBPLOCK from TDP)
When I did my supplemental fuel filter installation last July, I found removing the QD's a little tricky. However, keep trying and they will eventually release. Read the following post on the Diesel Place for a few more tips on removing the QD's.
the above tool works very well for the money and when only needed a couple of times, I have a couple 'racks' of them. For the D-max, I bought the Kent Moore version, while pricey (40.00) its made of metal and the release tangs are longer so it works good. Not worth the expense for these needs though
I used the plastic set shown when I removed all of my OEM hoses and they just work so-so. Some of the joints came apart easy and some did not. I think some of the clips are too far into the fitting for the plastic tool to reach so on those I just gave them a good pull and ripped them apart. This is not a good solution if you intend to reuse the fittings however because it will destroy them. I think they should all be replaced anyway, just my .02.
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