CAT312 Swing Motor Seal Kit
| Kit type | Swing motor seal kit |
| Application | Swing motor shaft and internal seals |
| Machine fitment | CAT312 |
| Variants in stock | 1 options — send your part number to match |
| Seal materials | NBR · PU · PTFE — as specified for the original application |
| Typical kit contents | Shaft (oil) seal · O-rings · backup rings · gaskets |
| Kit / part number | Confirm with us — send your kit number or cylinder number |
| Condition | New · OEM-standard aftermarket |
| Warranty | 6–12 months |
| Lead time | Stock 48 h · Non-stock 5–15 days |
Seal kits are listed by machine fitment and function. Seals are OEM-standard aftermarket in the original dimensions and materials. Not sure which kit? Send the machine model or a photo on WhatsApp.
About This Seal Kit
CAT seal and repair kits — boom, arm, bucket and control valve seal kits for CAT306/312/120B-class machines, plus travel motor, swing motor, center joint, pilot valve and travel valve kits. Every kit is assembled to the original part numbers.
The CAT312 Swing Motor Seal Kit is an OEM-standard aftermarket seal & repair kit for CAT312. Seals are OEM-standard aftermarket, made in the original dimensions and materials (NBR / PU / PTFE as specified for the application) so they drop into the original gland and piston grooves without modification. The kit covers the wear parts that fail first — wiper, rod seal, buffer, piston seal, wear rings, O-rings and backup rings — so the cylinder is rebuilt once, correctly.
Every unit is inspected and pressure-checked before dispatch and ships with a test report. Stock models leave within 48 hours; non-stock units are typically ready in 5–15 days. Sea, air and express shipping are available worldwide, and our team answers quote requests within 12 hours — usually much faster on WhatsApp.
Common Questions
Which kit do I need for my cylinder?
Tell us the machine model and which cylinder (boom, arm, bucket) — or send the cylinder part number. The kits are listed by function and machine fitment; we confirm before shipping.
Are these OEM seals or aftermarket?
OEM-standard aftermarket seals in the correct materials (NBR / PU / PTFE) and hardness. They fit the original gland and piston dimensions without modification.
Can I buy a mixed box?
Yes — seal kits are our steadiest wholesale line. Mix cylinder kits, control valve kits and O-ring boxes in one container; ask for a combined quotation.
Do you supply the O-ring box assortment?
Yes — the O-ring kit is a workshop assortment of the common sizes in a compartmented box.
Variants We Stock
Photos show the actual kits we hold under this name. Send your kit number, cylinder number or a nameplate photo on WhatsApp and we confirm which one is yours before shipping.
