316 Stainless Hydraulic Caliper Piston Kit

Name: 316 Stainless Piston Suits AL-KO, Trojan, Meher calipers
Brand: Couplemate
SKU: CALP-PART-PISTON-KIT
Price: 39.50 AUD
Availability: InStock

SKU: CALP-PART-PISTON-KIT Category: Disc Caliper and Parts Tags: AU/MK7, HBCFG, Hydraulic, marine parts, Meher, TA300, TA400, Trojan Brand: Couplemate

Stainless Caliper Piston Kit Includes Piston Seal

stainless caliper piston kit includes piston seal installed

Price

$39.50 Inc.GST

Key Benefits of Stainless Hydraulic Caliper Piston KIT

✓ Suits: AL-KO, Trojan, Meher HBCFG, TA300, TA400, and Trojan AU/MK7 calipers
✓ Manufactured from Marine-Grade 316 Stainless Steel.
✓ Long-Lasting Product with Easy Installation.

Designed and manufactured by Couplemate™ Australia.

Shipping

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316 Stainless Steel Hydraulic Caliper Piston Kit

Replacement stainless steel hydraulic caliper piston that fits all popular hydraulic calipers.

These stainless caliper pistons are manufactured for improved performance. Consider stainless pistons in your stainless hydraulic caliper.

Note: The image shows the top and bottom of the piston. Price per piece.

Installation

We recommend using a silicone-based lubricant such as “Inox MX6 synthetic grease.

Are Stainless Steel Pistons Worth It?

Phenolic caliper pistons are a common alternative to stainless steel. While they offer some resistance, they are incredibly susceptible to swelling, wear, and tear over time.

The movement of phenolic pistons creates slight abrasive marks, contributing to their gradual swelling and eventual adhesion, leading to failure.

In contrast, 316 Stainless Steel, renowned for its marine-grade quality and resistance to moisture absorption, provides a rust-free, low-maintenance solution for hydraulic pistons. The sliding mechanism of stainless pistons significantly prolongs their lifespan compared to standard counterparts.

For boat trailers using phenolic brake pistons, Couplemate™ engineers consistently recommend investing in Stainless Steel brake pistons for optimal performance and durability.

Product Specifications

The Stainless Hydraulic Piston is sold individually.

Materials: 316-Grade Stainless Steel
Suits Calipers: AL-KO, Trojan, Meher HBCFG, TA300, TA400, and Trojan AU/MK7 calipers

Hydraulic Caliper Replacement Pads are available below

How to Install Replacement Caliper Pistons?

During installation, generously apply hydraulic oil on and around the seal within the piston. When purchasing new hydraulic calipers, owners can opt for stainless pistons as an optional feature.

Seal wear might allow saltwater to enter the piston, so it’s advisable to have a replacement seal kit on hand in case the old seals stretch during caliper cleaning.

Pro Tip: After installing a stainless brake piston in Trojan calipers, flush all hydraulic lines to remove any contaminated fluid.

Finally, a good article about Refurbishing Brake Caliper Pistons on your Boat Trailer

Hydraulic Brake Caliper Seal Kit Guide

Ensure a leak-free installation and optimal braking pressure by following these essential repair procedures.

✔️ The Do’s

Clean thoroughly: Remove all traces of corrosion, old fluid, and road grit from the internal caliper grooves using dedicated brake cleaner.
Lubricate components: Coat the fresh rubber square seals and dust boots in clean, compatible brake fluid before pressing them into place.
Check the piston: Carefully inspect the caliper piston for microscopic pits, scoring, or chrome peeling before reassembling.
Bleed the system: Perform a full brake system bleed after installation to purge all trapped air bubbles from the hydraulic lines.
Verify seal fitment: Ensure the inner square ring sits completely flat and untwisted inside the caliper bore channel.

❌ The Don’ts

Don’t use metal picks: Avoid using sharp screwdrivers or steel picks to install seals, as they scratch the aluminum or cast-iron bore.
Don’t use petroleum products: Never wash or lubricate rubber brake seals with WD-40, mineral oil, or engine grease, which causes rubber to swell and fail.
Don’t force the piston: Avoid hammering or forcing the piston back into the bore; it should slide in smoothly with steady hand pressure if aligned correctly.
Don’t reuse old seals: Never reinstall a distorted, dry-rotted, or previously used rubber boot, even if it appears visually intact.
Don’t mix fluid types: Avoid contaminating the new seals by mixing incompatible brake fluids (such as putting silicone DOT 5 into a DOT 3/4 system).

Additional information

Weight	0.5 kg
Dimensions	6 × 6 × 6 cm
Materials	Stainless Steel

Our Service Lifetime Warranty

Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.

Couplemate™ is a manufacturer and vendor of high-quality towing, trailer, and caravan components. Couplemate™ Core Goods and Custom Work are guaranteed to be free of defects for the service lifetime of the product when used as intended.

Warranties are non-transferrable and Couplemate™ requires satisfactory proof of purchase prior to issuing a remedy. The full Couplemate™ Warranty Policy can be found in the Terms & Conditions: Section 8 – Consumer Guarantees & Warranty.

Warranties are in addition to your rights under the Australian Consumer Law. If something is wrong with your order, please contact our team.

60-Day Returns

After 60 years of experience, we know that life has its unpredictable moments.

All Couplemate™ orders (online, over the phone, or in-store) have a 60 day period for change-of-mind returns and exchanges. There are some items that can’t be returned and some returns may incur a 15% restocking fee.

You can view our full policy for change-of-mind returns here.