Coolant Reservoir Cap / Surge Tank Fill Cap – 572.2002 or 0520763001

A small component with a critical job.
The rTech Black Label RT2002 Coolant Reservoir Pressure Cap is a heavy-duty replacement designed for compatible commercial truck cooling systems.

Rated at 15 PSI, the RT2002 is designed to provide the correct pressure-cap function when installed in a compatible cooling system.

A properly functioning pressure cap is an important part of cooling-system operation. A worn, damaged, or incorrect cap can contribute to coolant loss and cooling-system problems.

Built for demanding fleet service, the RT2002 provides a straightforward replacement for compatible coolant reservoir and surge tank applications.

Built for uptime. Built for serious trucks.

Features & Benefits

• 15 PSI pressure rating
• Heavy-duty coolant reservoir pressure cap
• M52 × 2.5 buttress thread configuration
• Designed to help maintain cooling-system pressure
• Helps maintain a secure reservoir seal
• Durable construction for commercial vehicle environments
• Straightforward threaded installation
• Designed as an aftermarket replacement for compatible applications
• Fleet-approved Black Label quality 
  

rTech Product Specifications

• rTech Part Number: RT2002
• Product Type: Coolant Reservoir / Surge Tank Pressure Cap
• Pressure Rating: 15 PSI
• Thread: M52 × 2.5 Buttress
• Outside Diameter: 2.563" / approx. 65.1 mm
• Plunger Diameter: 1.262" / approx. 32.1 mm
• Installation: Threaded
• Series: rTech Black Label
  

Vehicle Applications

Designed as an aftermarket replacement for select Freightliner cooling-system applications.

Published interchange/application information for the 572.2002 / 05-20763-001 family includes certain:

• Freightliner Century Class
• Freightliner Classic
• Freightliner Classic XL
• Freightliner Columbia
• Freightliner FLD applications
  

Current catalogs corroborate the 15 PSI 572.2002 / 0520763001 / 0520763002 family.

Cooling-system configurations can vary by chassis, model year, engine, and reservoir. Verify fitment and required pressure rating before installation.

Direct Cross References

• rTech Black Label: RT2002
• Automann: 572.2002
• Freightliner: 05-20763-001
• Freightliner: 0520763001
• Freightliner: 05-20763-002
• Freightliner: 0520763002
• Reference: SC1002
• Dorman: 902-5201
• Dorman: 902-5201CD
  

I have not included S20471 publicly yet because I don't have enough corroboration to call it a verified direct interchange.

Cross-reference numbers and manufacturer names are provided for identification and fitment purposes only. All trademarks are the property of their respective owners. rTech Black Label products are independent aftermarket replacement parts and are not manufactured, sponsored, endorsed, or approved by the referenced manufacturers. Always verify fitment before installation.

Why the Correct Pressure Cap Matters

The cooling system is designed to operate within a specific pressure range.

The reservoir pressure cap forms part of that system and must be matched to the correct application.

An incorrect, worn, or damaged cap can contribute to:

• Coolant loss
• Improper cooling-system pressure
• Leakage at the reservoir
• Cooling-system service problems 
  

A cap that physically threads onto a reservoir is not necessarily the correct pressure cap for that cooling system.

For commercial fleets, correct fitment matters.