6K4191 Engine Oil Filler Cap fit Caterpillar
6K4191 Engine Oil Filler Cap fit Caterpillar
- New aftermarket part
- 30 day returns
- Manufacturer's warranty
6K4191 Engine Oil Filler Cap for Caterpillar Equipment
The 6K4191 is an engine oil filler cap used on Caterpillar engines and machines equipped with these engines, including Caterpillar integrated toolcarriers. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).
The part is identified as an engine oil filler cap for the listed Caterpillar engine and machine applications. Fitment should be checked against the equipment model, engine configuration, and the part number installed on the machine before replacement.
Fitment
The cap is listed for the following Caterpillar equipment and engine applications:
- Caterpillar 3056 engine
- Caterpillar 3056E engine
- Caterpillar 3116 engine
- Caterpillar 3126 engine
- Caterpillar 3126B engine
- Caterpillar 3304 engine
- Caterpillar C6.6 engine
- Caterpillar C7 engine
- Caterpillar IT28F integrated toolcarrier
- Caterpillar IT28G integrated toolcarrier
The supplied application data identifies the compatible equipment types as Caterpillar engines or machines and Caterpillar integrated toolcarriers. The listed models are the available fitment information for this part number.
Cross-reference numbers
| Part number | 6K4191 |
| Part number format | 6K-4191 |
| Component description | Engine oil filler cap |
6K4191 and 6K-4191 refer to the same listed part-number identification. No additional supplier or equipment-manufacturer reference numbers are provided in the available product data.
Specifications
| Part type | Engine oil filler cap |
| Equipment brand | Caterpillar |
| Material | Cast iron |
| Inner diameter | 3.44 in |
| Outside diameter | 7.31 in |
| Overall width | 1.19 in |
| Listed weight | 5.00 lb |
| Additional weight value in supplied data | 4 lb |
| Listed length | 17.8 cm |
| Listed width | 17.8 cm |
| Listed depth | 6 cm |
The supplied data contains two weight values, 5.00 lb and 4 lb, without identifying whether one refers to packaging or a different measurement record. The dimensions in centimetres are listed separately from the cap’s inch measurements and are reproduced as provided.






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