Dats Right Posted March 23, 2014 Report Share Posted March 23, 2014 I am wondering if anyone can identify this carb on my 69' 521 with a j15 engine, i am hoping to find a carb rebuild kit or if that doesnt work, interested in going with the weber 32/36 option but not sure if that can mount to the j15 without fabricating a plate. I cant seem to find any id numbers to pinpoint the model, there is a ltu sticker on it, and what i think is the hitatchi logo, any help with the id, or info on how to mount the weber would be much appreciated Quote Link to comment
ggzilla Posted March 23, 2014 Report Share Posted March 23, 2014 Looks like the stock carb. Hitachi DCG-328. A very good design and performance size for 1.5 liter. * float level appears too low * is the idle solenoid working? Quote Link to comment
datzenmike Posted March 23, 2014 Report Share Posted March 23, 2014 Hitachi Might be a 214282-132???? David I don't think they had the idle cut solenoid back then. Early 620 L16s did. Quote Link to comment
Dats Right Posted March 23, 2014 Author Report Share Posted March 23, 2014 dont believe the idle solenoid is working, dieseling is part of my problem i am extreme novice mechanic, have recently dismantled carb cleaned and reassembled but with same parts and seals, runs exactly the same Quote Link to comment
datzenmike Posted March 23, 2014 Report Share Posted March 23, 2014 Dieseling can be also from.. idle too high idle mixture too rich or choke on, carb flooding, air filter dirty spark plug heat range to hot engine running too hot poor gasoline needs more octane Quote Link to comment
Dats Right Posted March 23, 2014 Author Report Share Posted March 23, 2014 Thanks for the poissible ids and diagnosis, that helps, oh yeah throttle plates appear to be not fully closing, think its worth rebuilding? Quote Link to comment
datzenmike Posted March 23, 2014 Report Share Posted March 23, 2014 One throttle plate should be ever so slightly open as set by the idle speed screw. The secondary should be closed for sure. It is pulled open by vacuum when the motor is revved up under load and needed. Quote Link to comment
Dats Right Posted March 23, 2014 Author Report Share Posted March 23, 2014 Ah yes that one is open just a hair ok that makes a lot of sense learning as i go thanks Quote Link to comment
ggzilla Posted March 23, 2014 Report Share Posted March 23, 2014 Mike what is the red thing on the side of the carb? BCCD valve? A 1969 should not have an idle solenoid. They didn't start until 1972 and not til 1978? in AUS. Quote Link to comment
Dats Right Posted March 23, 2014 Author Report Share Posted March 23, 2014 I think it is anti-dieseling solenoid has a little plunger inside that is suppose to stop dieseling but doesnt, also trying to figure out why when revved high sometimes gets stuck at the higher rpm for a little while, the linkage seems ok so i thought maybe the throttle plate was the problem, not being able to pinpoint problem lead me to complete rebuild or new dizz, Quote Link to comment
datzenmike Posted March 23, 2014 Report Share Posted March 23, 2014 Mike what is the red thing on the side of the carb? BCCD valve? Not a BCCD as such. Probably a very primitive early application. It's a solenoid that lets air into the secondary side of the carb when... The throttle is closed or idling. (note switch on back of carb) The clutch is not being used. The transmission is not in neutral. This is the description for the '69 510 but I imagine the 521 is similar. It allows air in when decelerating to improve emissions. Quote Link to comment
Dats Right Posted March 23, 2014 Author Report Share Posted March 23, 2014 interesting i wonder if it is working, the electrical connection is quite shotty, any way to know if it works? Quote Link to comment
datzenmike Posted March 23, 2014 Report Share Posted March 23, 2014 The truck will run fine without it. I guess a test light to the solenoid, key on, in gear... it should light. Step on gas or clutch or shift out of gear the light goes out??? Quote Link to comment
Dats Right Posted March 23, 2014 Author Report Share Posted March 23, 2014 Thanks, Now i really want to make this carb work, but if it doesnt is it possible to hook up a weber to the j15 without fabricating parts, i saw one pic of one on a j15 on a thread but it did not explain how it was done, is there any direct hook ups or manufactured adapter plates for the j15? Quote Link to comment
datzenmike Posted March 24, 2014 Report Share Posted March 24, 2014 Depends on the bolt pattern on the intake. My guess is the Hitachi is the same as the L series bolt pattern so the weber adapter plates will work if so. Either way the two barrels will likely be way smaller and you should grind them out so it isn't restrictive. If the bolt pattern is different you will need to get a chunk of aluminum from a welding shop or scrap metal and make your own. Remove the intake studs and use bolts countersunk into the adapter to mount it on. The adapter will have studs sticking up to mount the weber. The barrels should line up as close as possible and grind away any bottleneck or obstructions. With time and patience, using a jig saw with fine metal cutting blade, a hand drill, (although a drill press would be easier) a wood rasp to shape the barrels, and a tap for threads. Measure twice cut once. Quote Link to comment
Dats Right Posted March 24, 2014 Author Report Share Posted March 24, 2014 Thanks a lot, it does sound more possible now, appreciate the instructions Quote Link to comment
Dats Right Posted March 26, 2014 Author Report Share Posted March 26, 2014 Hi turns out the accelerator pump is putting out a weak stream of fuel, the rubber boot is also cracked, having a hard time finding these parts for the hitachi dcg-328, does anyone know i of an item number or possible source for these parts that will fit this carb, thanks. Quote Link to comment
ggzilla Posted April 8, 2014 Report Share Posted April 8, 2014 The carburetor is like a Hitachi DCA306-4 except it is vacuum secondary. Maybe from outside USA model, seeing as its on a J15 engine. The model number will be here if it hasn't been scrubbed off Quote Link to comment
Dats Right Posted April 9, 2014 Author Report Share Posted April 9, 2014 Thanks a lot finally found a rebuild kit on rockauto Quote Link to comment
ggzilla Posted April 9, 2014 Report Share Posted April 9, 2014 Its not a DCA306, that was the J13 carb but looks similar. Its a 1971 L16 carb model DAF328. Quote Link to comment
ggzilla Posted April 9, 2014 Report Share Posted April 9, 2014 Here it is: 1970 early 1971 521 with L16 engine Hitachi model DAF326 compare: Quote Link to comment
Dats Right Posted April 9, 2014 Author Report Share Posted April 9, 2014 nice that is totally it, been dying to know exactly that drawing looks spot on, gonna go over it in detail to make sure many thanks Quote Link to comment
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