Brand New 337-5252 Radiator Coolant Expansion Water Tank for Caterpillar 950K, 621K, 627K

   Thank you for choosing SPARKLING MACHINERY. 
   The 337-5252 radiator expansion water tank is manufactured from high-density, heat-stabilized reinforced polymer (or heavy-gauge metal alloy) built to endure severe cooling system pressure cycles, chemical glycol exposure, and harsh engine room ambient temperatures. Designed to prevent cooling system cavitation, it features built-in de-aeration ports, fluid level sensor mounts, and reinforced hose connections. Replacing a cracked, discolored, or leaking surge tank stops coolant loss, prevents engine overheating, and maintains proper system pressurization.

The SPARKLING MACHINERY NEW 337-5252 WATER TANK Photo:

The SPARKLING 337-5252 Radiator Coolant Expansion Water Tank is a brand-new replacement component designed for compatible Caterpillar machines, including the 950K, 621K, and 627K models. It supports the cooling system by providing space for coolant expansion and contraction during normal engine operation, helping maintain stable coolant circulation and system performance.

Product Highlights
- Part Number: 337-5252
- Condition: Brand new
- Application: Caterpillar 950K, 621K, and 627K
- Function: Radiator coolant expansion and reserve tank
- Replacement Use: Suitable for repairing or replacing a damaged, cracked, leaking, or aged coolant tank

A reliable expansion tank is essential for controlling coolant volume and preventing unnecessary pressure fluctuations in the radiator system. The SPARKLING 337-5252 tank is manufactured for dependable fitment and consistent operation in demanding construction, mining, and earthmoving environments. Replacing a worn expansion tank in time can help reduce coolant loss, overheating risks, and unexpected equipment downtime.

Why Choose SPARKLING?
Founded in 2013, SPARKLING MACHINERY specializes in high-quality excavator and heavy equipment parts. Our product range covers hydraulic components, undercarriage systems, engine parts, electrical components, cabs, mini excavators, and accessories for leading brands such as Caterpillar, Komatsu, Hitachi, and Volvo.
We focus on stability, precision, and long-term reliability. Strict manufacturing and quality-control processes help ensure dependable product performance, while our technical team provides professional part consultation and customized solutions. With competitive pricing and global service support, SPARKLING helps equipment owners, repair workshops, and distributors reduce maintenance costs with confidence.

Before ordering, please confirm the part number, machine model, and installation requirements to ensure compatibility.