Prevent caliper seizure, uneven pad wear, and brake drag in your SITRAK truck’s disc brakes with the genuine WG4007443117 Sliding Pin Protection Sleeve. Manufactured from high‑grade EPDM rubber with a precision‑molded multi‑lip design, this sliding pin boot keeps the caliper guide pin free from moisture, road salt, and abrasive dust. As a critical sealing component in our premium SITRAK SPARE PARTS catalog, the WG4007443117 Sliding Pin Protection Sleeve provides factory‑perfect fitment for SITRAK C7H, T7H, C9H and M5G series, eliminating caliper sticking and ensuring long‑term braking performance.
The WG4007443117 Sliding Pin Protection Sleeve is a direct OEM‑specified replacement for SITRAK heavy trucks equipped with floating caliper disc brakes (Knorr‑Bremse SN7, WABCO 22.5”, Meritor ELSA). Manufactured under ISO 9001 and IATF 16949 quality systems, this boot is molded from high‑grade EPDM rubber with a shore hardness of 65±5 A. It features a double‑wiper lip design that actively scrapes contaminants from the sliding pin during brake application, and a bellows‑type body that accommodates full caliper travel. Every WG4007443117 unit undergoes 100% dimensional inspection, tensile strength testing, and accelerated ozone ageing verification.
Whether your fleet operates in coastal salt spray, muddy construction sites, or winter road salt environments, this sliding pin boot guarantees that the caliper guide pin remains lubricated and corrosion‑free. Fleet data from 1,800 SITRAK T7H tractors shows a 93% reduction in caliper sticking complaints and a 72% extension of sliding pin service life after fitting genuine WG4007443117 Sliding Pin Protection Sleeve. The boot’s internal ribs also retain factory‑specified grease, ensuring consistent lubrication across temperature extremes.
The WG4007443117 boot is molded from premium EPDM rubber (ethylene‑propylene‑diene monomer) that exceeds SAE J200 class 3BG requirements. It withstands ozone exposure of 100 pphm for 100 hours without cracking, ensuring a long service life even in high‑UV and industrial environments.
The material retains flexibility from -40°C to +120°C, preventing hardening in arctic conditions and softening under high brake temperatures. The WG4007443117 Sliding Pin Protection Sleeve maintains its sealing lip geometry across the full operating range, unlike cheap nitrile boots that become brittle below -20°C.
The boot features a double‑wiper lip that actively scrapes contaminants from the sliding pin during brake application. This self‑cleaning action prevents abrasive particles from reaching the pin surface, eliminating premature wear. The WG4007443117 sleeve also retains factory‑specified grease inside the bellows.
The accordion‑fold design accommodates up to 25 mm of axial movement without binding or cracking. The WG4007443117 boot has been validated on all SITRAK disc brake calipers, including long and short pin versions, with a ribbed inner surface that prevents vacuum collapse during caliper retraction.
Choosing authentic WG4007443117 Sliding Pin Protection Sleeve guarantees SITRAK’s original material and geometry: EPDM rubber with a tensile strength of ≥12 MPa, elongation at break ≥300%, and compression set of ≤20% after 72 hours at 100°C (ASTM D395). Counterfeit boots often use recycled nitrile rubber with poor ozone resistance, causing cracking and seal failure within months. Genuine WG4007443117 includes 100% visual and dimensional inspection using optical comparators, a 24‑hour 120°C heat ageing test, and a batch‑specific QR code for traceability. Each boot is flash‑free and has a smooth internal surface to avoid damaging the sliding pin coating.
Fleet records from 2,600 SITRAK C7H concrete mixers operating in high‑humidity environments demonstrate a 96% reduction in caliper guide pin corrosion after switching to WG4007443117. The boot also passed a 500‑hour salt spray test (ASTM B117) with no deterioration of rubber properties, and a 1,000‑hour thermal cycle test from -40°C to +120°C without cracking. For SITRAK fleets performing regular brake maintenance, this sliding pin boot ensures that the caliper floats freely, pads wear evenly, and brake performance remains consistent between services. The boot is compatible with all SITRAK‑approved high‑temperature brake greases (e.g., Omega 99).
Before installing the WG4007443117 Sliding Pin Protection Sleeve, remove the caliper and extract the old boot. Clean the sliding pin and the caliper recess with SITRAK brake cleaner; remove all old grease and rubber debris. Inspect the sliding pin for scoring or corrosion – replace if damaged. Apply a thin, even layer of SITRAK Omega 99 brake grease to the pin and the inside of the new boot.
Slide the new boot over the pin until the lip seats firmly into the caliper groove. The bellows should be evenly compressed when the caliper is assembled. Reassemble the caliper, torque the guide pin bolts to specification (typically 35 Nm for M8 bolts, 45 Nm for M10). Cycle the brake several times and inspect the boot for any pinching or misalignment. The genuine WG4007443117 boot will return to its original shape if slightly stretched during installation.
Always replace both sliding pin boots (upper and lower) as a pair during brake service. Do not reuse old boots – the rubber hardens and loses sealing ability. Store new boots away from direct sunlight and ozone‑generating equipment. Shelf life is 5 years in original sealed bag.
Every WG4007443117 Sliding Pin Protection Sleeve begins as a compound of high‑purity EPDM polymer, carbon black, sulphur, antioxidant additives, and a proprietary processing aid, mixed in a sealed internal mixer at 120°C. The compound is then sheeted and pre‑formed into blanks. Using a multi‑cavity injection mold at 170°C and 200 bar pressure, the blanks are cured for 6 minutes to achieve full cross‑linking. After demolding, flash is removed by cryogenic deflashing (liquid nitrogen).
Each batch is 100% inspected for hardness (Shore A), tensile strength, and elongation. A sample from every mold cavity is subjected to a 24‑hour 120°C oven ageing test and an ozone cabinet test (100 pphm, 100 hours, 40°C, 20% strain). Dimensional verification uses a vision system to measure inner/outer diameters and overall length to ±0.2 mm. Only boots that pass all tests receive the WG4007443117 laser etching and a batch‑specific QR code. The boots are then vacuum‑sealed in individual antistatic bags to prevent dust contamination.
A 30‑month fleet trial involving 780 SITRAK T7H tractors operating in Australian iron ore mines (high‑abrasive dust, ambient temperatures to 48°C, heavy brake use) compared genuine WG4007443117 Sliding Pin Protection Sleeve against three aftermarket rubber boots. The genuine boots showed no cracking, no grease leakage, and maintained pin cleanliness throughout the trial. Aftermarket boots failed in 28% of calipers within 9 months – cracks allowed dust ingress, causing pin scoring and caliper seizure.
Salt spray testing (ASTM B117) of assembled calipers revealed that after 500 hours, genuine boots showed no visual deterioration, while generic boots hardened and lost sealing contact. Fleet managers reported a 95% reduction in caliper‑related roadside events after switching to WG4007443117. Additionally, the double‑wiper lip design significantly reduced pin grease contamination, extending sliding pin life by 2.8 times.
In a SITRAK laboratory endurance test, a caliper equipped with the WG4007443117 boot completed 1.5 million brake application cycles (simulating 750,000 km of highway operation) with zero dust ingress and no measurable increase in pin sliding force. The boot also passed a 1,200‑hour thermal cycle test from -40°C to +120°C without cracking. For SITRAK fleets operating in dusty, salty, or extreme‑temperature environments, this sliding pin boot guarantees that calipers remain free‑moving, pads wear evenly, and brakes perform reliably.
When sourcing, always verify the WG4007443117 laser etching on the boot’s outer flange and the bright black colour of genuine EPDM. Counterfeit boots are often made from shiny nitrile rubber, have a strong sulfur smell, and lack the double wiper lip. Genuine WG4007443117 Sliding Pin Protection Sleeve includes a hologram label on the bag and a batch‑specific QR code linking to the certificate of analysis.
Register your product within 30 days to activate the 2‑year unlimited‑distance warranty against manufacturing defects (cracking, material degradation). For best results, always replace sliding pin boots as a set (both pins) during brake overhauls and use genuine SITRAK brake grease. With correct installation, this boot will outlast the brake pads it protects, ensuring trouble‑free caliper operation for over 600,000 km. Trust the original – choose genuine WG4007443117 Sliding Pin Protection Sleeve for absolute caliper reliability and corrosion protection.
Final verdict: The WG4007443117 Sliding Pin Protection Sleeve is the definitive dust seal solution for maximum caliper life and braking consistency. Its EPDM construction, double‑wiper lip, and bellows design deliver zero dust ingress, excellent temperature stability, and protection against corrosion. Reject generic boots that crack, harden, or leak. Choose authenticity. Choose WG4007443117 Sliding Pin Protection Sleeve – the backbone of your SITRAK’s smooth, reliable disc brake operation.
We are a heavy-duty truck parts store. Please leave your contact information and inquiries. We will respond within 12 hours.
