Place of Origin:
China
Brand Name:
CAT
Model Number:
3408C
The 169-3690 (1693690) is a complete 3408C engine assembly for the CAT D9R track-type tractor. The official parts catalogue classifies this number as a basic engine arrangement — a fully assembled unit combining the block, cylinder heads, pistons and crankshaft — rather than a single component. A quotation carrying this number is quoting a whole engine, so the scope must be written out clearly.
Key identifiers: 3408C engine assembly · 169-3690 / 1693690 · Basic Engine Arrangement (ENGINE AR) · Remanufactured alternative 30R-1837 / 30R1837 · Other arrangement quoted 203-5589 / 2035589 · Compatible machine: D9R track-type tractor · 4,496 lb
| Item | Specification |
|---|---|
| Product Name | Complete Engine Assembly |
| Primary Number | 169-3690; 1693690 |
| Official Part Name | Basic Engine Arrangement, listed in the parts catalogue as ENGINE AR |
| Remanufactured Alternative | 30R-1837; 30R1837, offered as a remanufactured long block on the 3408 DI build |
| Other Arrangement Quoted | 203-5589; 2035589 |
| Related Numbers | 7W-2225 cylinder head assembly; 9X-1413 fuel shutoff solenoid; 4362850 cooler group exhaust; 4373512 and 4373551 diesel particulate filter; 4372561 filter and mounting |
| Engine Family | 3408; 3408 DI; 3408B; 3408C; 3408C-TA; 3408E; and quoted with 3412, 3412C and 3412D |
| Configuration | 18.0 L, 1099 cubic inch, V8, water cooled, turbocharged |
| Bore and Stroke | 137 mm bore by 152 mm stroke |
| Official Compatible Machine | D9R track-type tractor |
| Weight and Size | 4,496 lb, 58 in long, 60 in high |
| Rated Output | About 300 kW in the D9R application; marine ratings quoted near 378 kW at 1800 rpm |
| Condition | New, remanufactured and used assemblies are all traded under this number |
| Core Return | Old engine core returnable, as detailed in the cross reference table below |
| Packaging | Braced on a steel skid, ports capped, moisture barrier, export crate |
| Category | Replaceable Part Numbers & Compatible Models |
|---|---|
| Number Forms | 169-3690; 1693690 |
| Reman Alternative | 30R-1837; 30R1837 |
| Other Quoted Arrangement | 203-5589; 2035589 |
| Related Numbers | 7W-2225; 9X-1413; 4362850; 4373512; 4373551; 4372561 |
| Compatible Machines | D9R, and quoted for D9 GC and the wider D9 group; 3412 and 3412C are separate V12 assemblies |
The official listing calls 169-3690 a basic engine arrangement, describing a fully assembled unit combining the block, cylinder heads, pistons and crankshaft. A quotation carrying this number is quoting a whole engine, so the scope has to be written out.
The official page offers 30R-1837 as a remanufactured long block on the 3408 DI build, in the same family as the 10R and 20R exchange numbers. A long block is not an arrangement, so the two must not be priced as equals.
For replacement engines and long blocks the removed engine core must be returned to the selling dealer, under special instruction PELJ1301. A quotation that does not mention the core is incomplete for such a sale.
Listings for this number are written as 3408C, 3408C-TA, 3408, 3408B and 3408E in one title, and others add 3406E, 3508B, 3508E, 3512E, 3516E and 3520E. Those are different engines, so the number on the engine plate has to be matched.
Prices are quoted per piece, per set, per unit, per box, per bag and per thirty pieces, ranging from about USD 788 to near 524,000. Ask for one price per engine for the stated condition and build.
The 3408 is also built as a marine engine and a generator set engine, with different ratings and arrangement numbers. One listing markets this number as marine while naming the D9R in the same line.
A complete 3408C engine assembly for the D9R, quoted as 169-3690, which the official parts listing calls a basic engine arrangement.
The official listing names the D9R track-type tractor, at 4,496 lb.
No, it is a remanufactured long block offered as an alternative.
No, it is a different engine in the family.
Yes, the official listing requires the core back.
The arrangement number and serial from the engine plate, and the machine application.
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