The J400 Family, Profile by Profile
Buying a J400 tooth is really choosing a profile on the J400 pin. The published numbers, all from aftermarket catalogues and all on the same 7T-3408 pin:
| Profile | Number | Published weight | Where it is used |
|---|---|---|---|
| Standard short | 7T-3401 | 18.9 lb / 8.57 kg | General purpose digging where the bucket is loaded from the tip |
| Standard long | 7T-3402 | 20.8 lb / 9.43 kg | The default tip for mixed ground on J400 buckets |
| Penetration | 6Y-7409 | 20.3 lb / 9.0 kg (290 × 119 × 37 mm) | Hard or compacted ground; thin section, long point |
| Tiger long | J400TIGER | 23.0 lb / 10.43 kg | Frozen, shaly or tight material |
| Twin tiger | J400TWIN | 26.2 lb / 11.88 kg | Compacted and frozen ground, twin points |
| Heavy duty long | 8E-4402 | 25.4 lb / 11.52 kg | Loaders and high-abrasion digging |
| HD abrasion | 168-1409 | 26.0 lb / 11.8 kg (320 × 124 × 62 mm) | Rock and abrasive spoil, longer body |
| Rock chisel | J400RC | 26.2 lb / 11.88 kg | Rock, with a chisel nose |
| HD abrasion long | J400HDAL | 31.8 lb / 14.42 kg | The heaviest J400 point published |
Note what the dimensions say. The 7T-3402 loader profile is printed 114 mm deep at the adapter end; the 6Y-7409 penetration point of the same series is 37 mm. Same pin, same nose class, very different castings — which is why "we ran a J400 on the old machine" is not a specification until you name the profile.
Pin, Retainer and the Two Catalogue Answers
The J400 pin is the easy part: 7T-3408 in both catalogues, also written 116-7408. The retainer is where the aftermarket splits, and it is worth knowing before a quotation arrives. Black Cat prints retainer 7T-3409 (alternative 116-7409); TRASTEEL prints 8E-8409 (alternative 166-7409). Both are sold into the same 980-class loaders and 330/336-class excavator buckets. If your old retainer is stamped 7T-3409 and your new quote says 8E-8409, nothing is wrong — you are being handed the other catalogue's answer. The site has more on that pattern in the J-series ladder guide, and on the 7T-3408 pin turning up in Doosan parts rows in the DH300 / DX300 guide.
One caution that pays for itself: if the pin came out of a worn nose with a hammer and the tip sat loose, buy the adapter with the teeth. A J400 tip on a worn nose loses pins, and a lost pin means a tip in the crusher.
Adapters: Bolt-On for Loaders, Weld-On for the Rest
J400 teeth are fitted two ways. On wheel loaders, the bolt-on adapter is 6I-9898 in the centre position — 63.2 lb / 28.7 kg, 1.75 in bolt, published for the 980G, 980H, 980F and 980C — with 6I-8243 and 6I-8244 at the corners at 77.9 lb / 35.3 kg. On excavator and older loader buckets the two-strap weld-on adapter for this tooth class is 125-8404 at 37.2 lb / 16.9 kg, published for 980 / 973 / 966 machines. Whichever route your bucket uses, the nose has to be a J400 nose: measure across it at the pin line, because a J350 nose and a J450 nose are both close enough in a photo to fool a buyer.
Where We Fit In
We supply 7T-3402 castings, the 7T-3408 pins and the retainers as one line item, so nothing arrives that does not fit what it came with. Send the tooth number, the pin number or a photo of both old parts with a tape measure in frame, and tell us the ground you are working in — we will quote the profile that lasts rather than the one that is easiest to price.
FAQ
Q: What pin and retainer does a Cat 7T-3402 tooth take?
A: The J400 pin is 7T-3408, also published as 116-7408. The retainer has two published answers: Black Cat prints 7T-3409 with the alternative 116-7409, while TRASTEEL prints 8E-8409 with the alternative 166-7409. Both are sold for the same J400 buckets. Our published wear chart gives J400 a 22 mm pin, 119 mm long, with a 42 mm retainer.
Q: How much does a J400 tooth weigh?
A: It depends on the profile. Black Cat lists the 7T-3402 standard long tip at 20.8 lb / 9.43 kg; TRASTEEL prints the loader profile for the same series at 295 × 119 × 114 mm and 10.6 kg and its symmetric long profile at 11.2 kg; the family spread runs from the 18.9 lb / 8.57 kg standard short 7T-3401 to the 26.2 lb / 11.9 kg rock chisel.
Q: Which adapter fits a 7T-3402 tooth?
A: A J400 nose. On wheel loaders the bolt-on adapter for J400 teeth is 6I-9898 in the centre position (63.2 lb / 28.7 kg, 1.75 in bolt, 980G / 980H / 980F / 980C) with 6I-8243 and 6I-8244 at the corners; the weld-on two-strap alternative is 125-8404 (37.2 lb) for the 980 / 973 / 966 class.