Place of Origin:
China
Brand Name:
Cum-mins
Model Number:
3529032
The 3529032 HT3B turbocharger assembly serves the fourteen-litre Cummins six-cylinder family badged NT855, NTA855, NTA400 and NTC444. One shared casting covers a wide ladder of release figures, so the outside of every unit looks the same while the compressor trim and turbine housing behind it differ by rating and by application. This page sets out how the figures relate, how the housing type and clock position are confirmed, and what to check before an order is placed.
| Product Name | Turbocharger Assembly |
|---|---|
| Charger Frame | HT3B, also released with a prefix as BHT3B |
| Quoted Number | 3529032 |
| Common Companions | 3527046, 4033815, 3529030, 3530048 |
| Older Figures | 167713, 3803108, 3525299, 3523415 |
| Engine Family | Fourteen litre six, badged NT855, NTA855, NTA400 and NTC444 |
| Housing Type | Twin entry turbine housing on the pulsed builds |
| Duty | Bulldozer, excavator, marine and generating set |
| Machine References | D85A-18 class dozer and four hundred class excavator among others |
| Packing | Crated, both ports capped, studs protected |
Public listings for this charger carry well over a dozen distinct release figures, and every one of them will bolt to the same manifold — which is precisely why a wrong order still starts and runs.
The engine was sold from a modest rating up to the four hundred and forty four figure, and the compressor side is matched to that rating rather than to the block.
A build released with a leading letter is quoted against the same machines and is often listed next to the plain form, though the internal parts are not a straight swap.
Pulsed builds use a divided inlet to keep exhaust pulses apart, and a single entry housing fitted in its place will run but will lose the response the machine was specified for.
Dozer, excavator, marine and generating installations clock the housings differently, and a unit built for one will foul bodywork on another.
A nine digit figure is sometimes passed along with this enquiry and it matches no published group, so it must be read off the plate and not copied into a purchase order unchecked.
A charger trimmed for a lower rating fitted to a higher one will over speed under load and takes the wheel with it, so the rating must be confirmed before dispatch.
A partially blocked element shows normal boost at idle and low boost on the gauge under load, and replacing the charger first is the expensive way to find it.
The drain must fall continuously to the sump, and a hose that sags holds oil against the seal until it passes.
Q1: Is this the same unit for a dozer and an excavator?
The internals can be, but the housings are clocked differently for each.
Q2: Why do so many figures apply?
Each rating and each release was given its own figure against one casting.
Q3: Can I fit the prefixed version instead?
Only where the tag on the old unit names it.
Q4: What should I photograph before ordering?
The plate, the housing inlet, and the outlet angle.
Q5: Does it come with gaskets?
Only when the order says so.
Q6: Can the boost be raised on the machine?
No, the actuator is preset.
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