319-3557 Lift Cylinder Seal Kit for Caterpillar D8R D8R II D8T & D8GC Dozers
Product Overview
The 319-3557 hydraulic cylinder seal kit is a factory-manufactured aftermarket replacement kit cross-referenced against the genuine Caterpillar part number 319-3557 (also written 3193557 or CA3193557), listed by the Cat Parts Store as a “STANDARD SIZE” hydraulic cylinder seal kit containing all seals required for a complete reseal of a standard nominal bore (up to 0.25 mm maximum bore oversize). Independent aftermarket listings document this kit on the blade lift cylinder of Caterpillar D8-series track-type tractors, including the D8R, D8R II, D8T and D8GC, with related listings also covering the D8N and the D7H, D7R and D8L models.
DJF Seals manufactures and supplies the 319-3557 kit at factory-direct wholesale pricing for Caterpillar equipment dealers, repair shops and fleet maintenance programs.
Verified Application
The following application data was cross-checked against the Caterpillar parts system, parts resellers and marketplace listings:
| Part Number | 319-3557 (3193557; CA3193557) |
| OEM Reference | Caterpillar 319-3557 “STANDARD SIZE Hydraulic Cylinder SEAL KIT” (genuine Cat part per parts.cat.com) |
| Cylinder Position | Blade lift cylinder (per multiple aftermarket listings); the current page also claims the tilt position — lift is confirmed, tilt is not independently confirmed for this number |
| Verified Fitments | Cat D8R, D8R II, D8T, D8GC (per eBay, Amazon and deedparts listings); D8N per Alibaba listing; D7H, D7R, D8L per one Alibaba listing |
| Condition | New, aftermarket replacement |
Note: specific material grades, pressure rating, temperature range, exact piece counts, certifications and service life are factory data and are not independently verified. Confirm these details with the factory before ordering.
Replacement Scope
Per parts.cat.com, this is a standard-size hydraulic cylinder seal kit: it contains all seals required for a complete reseal of a standard nominal bore hydraulic cylinder, up to 0.25 mm (0.010 in) maximum bore oversize. Exact kit contents and piece counts should be confirmed with the factory against your cylinder before ordering.
Fitment Verification
The part number, cylinder position and fitments were verified through multiple independent sources:
- parts.cat.com (Caterpillar official): 319-3557 “STANDARD SIZE Hydraulic Cylinder SEAL KIT” — complete reseal kit for a standard nominal bore up to 0.25 mm max oversize.
- eBay: “319-3557 Seal Kit For Cat D8R D8T D8RII D8GC Tractor Lift Cylinder”.
- eBay: “Lift Cylinder Seal Kit 319-3557 For CAT D8R D8T D8RII D8GC Dozer” — full set for a complete lift hydraulic cylinder overhaul.
- Amazon: “Hydraulic Cylinder Seal Kit, Compatible with CAT 3193557, for D8R D8T D8RII D8GC Bulldozer Tractor Repair Replacement Part” (B0GCJGH7CD); “Compatible with TRACK-TYPE TRACTOR D8T D8R D8R II D8GC” (B0DS12M6YP).
- deedparts.com: “Hydraulic Cylinder Seal Kit CA3193557 319-3557 3193557 for Caterpillar” — compatible with D8R, D8R II, D8T tractors.
- Alibaba: “CAAT D7H D7R D8N D8L D8R D8T Bulldozer Lift Cylinder Seal Kit 319-3557 324-0356 324-0411 319-3556” — documents the lift cylinder position and the additional D7H, D7R, D8N and D8L models; 324-0356, 324-0411 and 319-3556 appear as related numbers in the same listing.
- Conflict note: the current page claims serial prefixes “JAP, B8L”; these could not be independently verified and are not claimed on this page.
- Conflict note: the current page describes the kit as covering both blade lift and tilt cylinders and states “Caterpillar-approved / OEM-Certified” — the lift position is confirmed by multiple listings, the tilt position is not independently confirmed for 319-3557, and no source verifies an OEM certification claim.
- Conflict note: the current page’s technical claims (0–28 MPa, -40°C to +120°C, PU/FKM materials, ISO 6194 and Caterpillar 1U-9901 compliance) are generic factory data and are not independently verified.
- Materials, pressure, temperature, piece counts, certifications and service life are not independently verified.
Factory Inspection & Packing
Each 319-3557 kit is assembled and checked at the DJF factory before packing. Sealing elements are placed in labeled poly bags marked with the part number, then packed into export cartons for protection during international shipping. Kits can be packed under DJF branding, neutral packaging, or your own private label for distribution.
Wholesale Ordering
DJF Seals supplies the 319-3557 kit at factory-direct wholesale pricing for distributors, dealers and repair shops. To request a quotation, send your part number and quantity to [email protected] or [email protected]. OEM/ODM service, custom packaging and bulk container shipping are available for regular programs.
MOQ
MOQ: 5 kits.
FAQ
Q: Which machines does the 319-3557 seal kit fit?
A: Verified fitments are the Cat D8R, D8R II, D8T and D8GC track-type tractors; additional listings document the D8N, and one listing adds the D7H, D7R and D8L. Confirm your machine model and serial number before ordering.
Q: Which cylinder does this kit service?
A: Multiple aftermarket listings identify the blade lift cylinder. The current page also claims the tilt position, which is not independently confirmed for 319-3557 — verify the cylinder position on your machine before purchase.
Q: Is 319-3557 a genuine Caterpillar part number?
A: Yes. parts.cat.com lists 319-3557 as a “STANDARD SIZE” hydraulic cylinder seal kit. This page sells a factory-made aftermarket replacement cross-referenced to that number.
Q: What does “standard size” mean for this kit?
A: Per Caterpillar, the kit contains all seals required for a complete reseal of a standard nominal bore hydraulic cylinder, up to 0.25 mm (0.010 in) maximum bore oversize.
Q: What is the minimum order quantity?
A: MOQ: 5 kits.
