Description
PAI Industries FTK-3424 aftermarket coolant surge tank conversion kit for Mack CH, R / RB / RD / RW, CL, and CX (CV) models — ships as the top-mount surge tank plus the matching sensor and inlet fitting needed to replace older composite tank assemblies. Direct cross to Mack OEM 25174629, 76MF515M, and 76MF515AM.
Specifications
| Manufacturer | PAI Industries |
|---|---|
| Part Number | FTK-3424 (kit) |
| Part Type | Coolant Surge Tank Conversion Kit (Top Tank) |
| Application | Mack RD / CH / CV-family vocational and on-highway chassis |
| Replaces OEM | Mack 25174629, 76MF515M, 76MF515AM |
Kit Includes
- Coolant surge tank — PAI FTK-3421 (cross to Mack 76MF520M / 25174629) — qty 1
- Coolant level / temperature sensor — PAI FSU-0556 — qty 1
- Tank-to-engine fitting — PAI MAD-5236 — qty 1
Cross References
This surge tank kit replaces or is equivalent to the following part numbers:
- Mack: 25174629, 76MF515M, 76MF515AM
- PAI Industries: FTK-3424 (complete kit)
Applications
This top-tank surge tank conversion kit fits:
- Mack CH (CH600 / CH613 / CHU on-highway tractors)
- Mack R / RB / RD / RW vocational chassis
- Mack CL (premium long-haul)
- Mack CX / CXN / CV (Granite) vocational chassis
This kit is for trucks originally fitted with the top-tank surge tank assembly — not the side-tank style. Verify the original tank’s mounting bracket and hose routing before ordering.









