Place of Origin:
China
Brand Name:
Isuzu
Model Number:
3075537
The 3075537 PT fuel pump is a pressure-time injection pump built for the large-bore Cummins K family. The base figure covers a dozen engine ratings, and the two letters printed after it decide whether the pump suits a generator, a marine set or a haul truck. This page explains what those letters do, lists the cross figures buyers arrive with, and states what must be checked before the unit ships.
| Product Name | Pressure-time fuel injection pump, PT system |
|---|---|
| Base Figure | 3075537 |
| Calibration Suffix | Printed after the base figure, seen as BE04, BC83A, BC86, BB12 and KH52A; this is the part of the number that sets the fuel curve |
| Engines Covered | K38, K50, KTA38, KTA50, QSK50; listings also quote K19 and GTA855 |
| Cross Figures | 3636943, 4345047, 3632513, 3631721, 3408326, 2056986, 3059657, 3070123, 4915476, 3010245, 3015119, 3054521, 468846, 4345421, 3080571 |
| Generator Fitment | KTA38-G5, G8, G9 and KTA50-G3, G5, G8 sets |
| Marine Fitment | KTA38-M and KTA50-M propulsion sets |
| Machine Fitment | Large dozers and mining trucks on the same engine family |
| Metering | Pressure and time are set in the pump, while the volume is metered at each injector |
| Condition Offered | New, and rebuilt with a flow report on the bench |
| Packing | Port caps fitted, throttle shaft braced, crate on request |
| The Letters Are The Part | Two pumps carrying the same base figure and different letters will both bolt on, and only one of them will fuel the engine to its rating. |
|---|---|
| Fifteen Ways In | Fifteen separate figures circulate for this pump across rebuilders and dealers, and a quotation that ignores the one the customer holds looks like a refusal to quote. |
| Old Engine Naming | The largest engine in this range was sold for years under a cubic inch name, and buyers still quote that older name for the same machine. |
| Governor Duty | Generator sets hold a fixed speed, marine sets vary speed with the throttle, and the governor inside the pump is built for one duty only. |
| Rebuilt Traders | Rebuilt units wear a different suffix plate from the pump they replace, so the base figure is read together with the calibration code. |
Related Components: Injectors, fuel shutoff valve, throttle linkage, filter head, priming pump, drive coupling.
No, the calibration suffix sets the fuel curve.
No, the governor duty differs between them.
They describe the same family at different builds.
The plate, the suffix and the engine rating.
Usually a restricted return line.
No, it is set and sealed on a bench.
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