{"product_id":"kti-q2-4113-hydraulic-pump-reservoir-o-ring-fits-3-6-8-quart-tanks-dump-trailer-hydraulic-power-unit-seal","title":"KTI Q2-4113 Hydraulic Pump Reservoir O-Ring — Fits 3 \/ 6 \/ 8 Quart Tanks — Dump Trailer \u0026 Hydraulic Power Unit Seal","description":"\u003ch2\u003eKTI Q2-4113 Hydraulic Pump Reservoir O-Ring — Tank-to-Pump Seal for All Standard KTI Reservoirs\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eKTI Q2-4113 O-Ring\u003c\/strong\u003e is the factory sealing ring installed between the hydraulic pump manifold and the fluid reservoir on virtually all KTI hydraulic power units. Over time this O-ring compresses, dries out, or tears — leading to slow oil weeps, pressure loss, and air ingestion that makes your pump run rough. Replace it anytime you disassemble the pump from the tank for service, and always keep a spare in the tool box.\u003c\/p\u003e\n\n\u003ch3\u003e🔧 What It Does\u003c\/h3\u003e\n\u003cp\u003eThis O-ring provides the primary fluid seal between the reservoir and the pump body. It's a standard service part — replaced during reservoir cleaning, pump service, fluid changes, or anytime the tank is separated from the pump. Failure to replace the O-ring on reassembly virtually guarantees a slow leak.\u003c\/p\u003e\n\n\u003ch3\u003e📐 Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number (KTI)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eQ2-4113\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInner Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4.448\" (approximately 4-1\/2\")\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCross Section\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.157\" (approximately 1\/8\" \/ 4mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMetric Equivalent\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eI.D. 113mm × C\/S 4mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBuna-N (nitrile rubber) — standard hydraulic fluid compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eReservoir-to-pump manifold seal\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eKTI Hydraulics (OEM)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e✅ Compatible Reservoirs \u0026amp; Pumps\u003c\/h3\u003e\n\u003cp\u003eThis O-ring fits \u003cstrong\u003eall standard KTI reservoir tanks\u003c\/strong\u003e — 3-quart, 6-quart, and 8-quart sizes in both steel and polymer (plastic\/poly) construction. Direct replacement on:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKTI DC26-S\u003c\/strong\u003e — 12V single-acting 6qt hydraulic power unit\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKTI DC-4000 \/ DC-45597 \/ DC-45598\u003c\/strong\u003e — dump trailer pump variants\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eAny KTI pump with a 3, 6, or 8-quart standard reservoir\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003ePumps using KTI reservoirs on Load Trail, Big Tex, PJ Trailer, Griffin, Diamond C, Cargo Mate, and most major dump trailer brands\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e🔁 Cross-References\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLoad Trail:\u003c\/strong\u003e 070089\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKTI OEM:\u003c\/strong\u003e Q2-4113\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFits all standard KTI hydraulic power units\u003c\/strong\u003e using Q2 series reservoirs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e📦 What's Included\u003c\/h3\u003e\n\u003cp\u003e1 × Q2-4113 O-Ring (Buna-N)\u003c\/p\u003e\n\n\u003ch3\u003e💡 Pro Tips — Installation\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLubricate before install.\u003c\/strong\u003e Apply a thin coating of clean hydraulic fluid to the O-ring before seating it. A dry O-ring can pinch or roll during assembly, causing immediate failure.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClean the sealing surfaces.\u003c\/strong\u003e Both the manifold face and the reservoir mating surface must be clean and free of nicks or contamination. Wipe with a lint-free rag before reassembly.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInspect for damage.\u003c\/strong\u003e If you see tearing, flat spots, or hardening on the old O-ring, you almost certainly have the right part — this is the KTI reservoir gasket.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKeep a spare.\u003c\/strong\u003e At this price point, every KTI pump owner should have at least one on the shelf. If you disassemble the pump, you should replace the O-ring every time.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTorque pattern.\u003c\/strong\u003e When reassembling the reservoir bolts, go in a star pattern and snug evenly — don't overtighten, which can distort the tank or manifold.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e❓ FAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWill this fit my 8-quart tank?\u003c\/strong\u003e\u003cbr\u003e\nYes. This is the universal KTI reservoir O-ring and fits all standard 3-quart, 6-quart, and 8-quart KTI tanks.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow often should I replace it?\u003c\/strong\u003e\u003cbr\u003e\nReplace anytime you separate the pump from the reservoir. For normal service (not disassembled), inspection every 2-3 years is reasonable — or at first sign of oil weep around the tank mating surface.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes it fit gravity-down pumps too?\u003c\/strong\u003e\u003cbr\u003e\nYes. Q2-4113 is a reservoir-to-pump seal — it's agnostic to single-acting, double-acting, power-up\/power-down, or power-up\/gravity-down pump configurations.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs Buna-N compatible with my hydraulic fluid?\u003c\/strong\u003e\u003cbr\u003e\nYes, Buna-N (nitrile) is the standard material for hydraulic applications using petroleum-based fluids, including AW 32, AW 46, ATF (Dexron), and most conventional hydraulic oils used in dump trailers.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQuestions?\u003c\/strong\u003e Call or text AAA Trailer at \u003cstrong\u003e517-225-1991\u003c\/strong\u003e — we stock the full KTI hydraulic line and can help you identify the right replacement part. Same-day shipping from Howell, Michigan.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e📞 Call\/Text: 517-225-1991   🌐 AAATrailer.com\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\u003ch3\u003eRelated KTI Hydraulic Products\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/aaatrailer.com\/products\/kti-dump-trailer-hydraulics-6-quart-plastic-reservoir-tank-8181-6\"\u003eKTI 8181-6 6-Quart Reservoir Tank\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/aaatrailer.com\/products\/kti-dump-trailer-hydraulics-6-quart-plastic-reservoir-tank-kit-with-hardware\"\u003eKTI 8181-6-KIT 6-Quart Reservoir Tank Kit\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/aaatrailer.com\/products\/kti-dump-trailer-hydraulics-3-quart-plastic-reservoir-tank-kit-with-hardware\"\u003eKTI 8181-35-K 3-Quart Reservoir Tank Kit\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/aaatrailer.com\/products\/products-kti-25-3-hydraulic-reservoir-cap-replacement\"\u003eKTI 25-3 Reservoir Cap\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KTI","offers":[{"title":"Default Title","offer_id":52766510121269,"sku":"Q2-4113","price":7.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/9144\/0181\/files\/kti-q2-4113-hydraulic-pump-reservoir-o-ring-fits-3-6-8--sq.jpg?v=1782503791","url":"https:\/\/aaatrailer.com\/products\/kti-q2-4113-hydraulic-pump-reservoir-o-ring-fits-3-6-8-quart-tanks-dump-trailer-hydraulic-power-unit-seal","provider":"AAA Trailer","version":"1.0","type":"link"}