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SKU:
NLT2T03478
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Fuel Primer Pump for Caterpillar 3114 C7 3406B/C/E C15 – 105-2508 / 4W0788 / 6N6800
$65.79
In Stock
$65.79
Sale price
$65.79
Regular price
This manual fuel primer pump replaces Caterpillar 105-2508 and multiple earlier references for supported 3114, C7, 3406B/C/E and C15 diesel applications.
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
| Application | Models / Details |
|---|---|
| Caterpillar engines | 3114; C7; 3406B; 3406C; 3406E; C15 and other Cat engines where 105-2508 is specified |
Product Overview
The primer is used to draw fuel into the low-pressure system and purge air after a filter change, fuel-system service, or loss of prime. A worn primer can leak externally, pull air, fail to build resistance, or make bleeding the system unnecessarily difficult.
Caterpillar cross-reference listings connect 105-2508 with numbers including 4W0788, 4N2511, 6N6800, 1W5014, 8N6800 and 9S8617. The broad engine coverage makes the part-number match more important than any single machine model.
Key Features & Performance
- Manual diesel fuel-system primer pump
- Primary Caterpillar service reference 105-2508
- Cross-references include 4W0788, 4N2511, 6N6800 and several earlier Cat numbers
- Supported engine listings include 3114, C7, 3406B, 3406C, 3406E and C15 where this primer configuration is used
Specifications & Reference Numbers
- Primary reference: 105-2508
- Cross-references: 4W0788; 4N2511; 6N6800; 1W5014; 8N6800; 9S8617; 1W4999
- Component: Manual fuel primer pump
Before You Order
Confirm the primer reference and mounting/sealing arrangement on your filter base or fuel system. Replace damaged seals and inspect the filter-base threads/surfaces if the old primer leaked.
Frequently Asked Questions
Q: When do I use the primer pump?
A: After opening the low-pressure fuel system—such as during filter replacement—or whenever air must be purged before starting.
Q: Why might a primer never get firm?
A: Air leaks, an empty/restricted tank supply, damaged primer check valves or a leak elsewhere in the low-pressure circuit can prevent it from building resistance.