EP-148-4644 Swing Drive Reduction Gearbox — Direct Fit for CAT 320C & 320D Excavators
Your CAT 320C Won’t Swing. Here’s the Fix.
That grinding noise, the slow rotation, then nothing. Your excavator is down. The swing gearbox is the culprit — when it fails, the machine stops.
This 148-4644 swing drive reduction gearbox is an OEM-spec direct replacement for CAT 320C and 320D. Bolt-on fit. No shimming. No adaptor plates. 100% load-tested. Video inspection included. 1-year warranty. No MOQ. In stock. Ships 4–7 days.
Compatible with 130+ excavator models. Send your serial number — fit confirmation within 4 hours.
EP 148-4644 Swing Drive Reduction Gearbox — Direct Fit for CAT 320C & 320D Excavators
✓ 100% Load-Tested
✓ 1-Year Warranty
✓ No MOQ
✓ Video Inspection Provided
What Is the EP 148-4644 swing drive reduction gearbox — and What Does It Do?
The excavator swing drive gearbox (Part No. 148-4644) is a multi-stage planetary reduction unit mounted between the swing motor and the excavator's upper frame. Its job is to convert the high-speed, low-torque output from the hydraulic swing motor into the low-speed, high-torque rotation that swings the entire cab, boom, and arm assembly through 360°.
When this swing reduction gearbox fails, the excavator cannot rotate — grounding the machine completely. This OEM-spec replacement is manufactured to Caterpillar's original dimensional tolerances. Bolt patterns, shaft diameter, and mounting faces match factory units. Average installation time: 4–6 hours with standard shop tools. No shimming, no adaptor plates.
EP-148-4644 Swing Drive Reduction Gearbox — Direct Fit for CAT 320C & 320D Excavators
swing drive reduction gearbox Product Specifications
| Parameter | Details |
|---|---|
| Part Number | 148-4644 |
| Condition | New |
| Category | Construction Machinery Parts — Swing Gearbox / Swing Reducer |
| Equipment | Caterpillar 320C, 320D Excavator (primary fit) |
| Application Type | Direct OEM replacement — no shimming or adaptor plates |
| Warranty | 1 year from shipment date (manufacturing defects) |
| Minimum Order Quantity | No minimum — order as few as 1 unit |
| Stock Code | 9201952 |
| Quality Documentation | Machinery test report + video outgoing inspection — provided with every order |
| Inner Packaging | Wrapped in plastic film; clear individual label per item |
| Outer Packaging | Carton or plywood case (size depends on packing type) |
| Shipping Methods | Sea freight, air freight, express carrier (DHL / FedEx / UPS) |
| Trade Terms | EXW, FOB, CFR, CIF |
| Lead Time | In stock: 4–7 days processing. Bulk production: 10–35 days (quantity-dependent) |
Why Buyers Choose This Swing Gearbox
No-load run-in followed by full rated-torque bench test. Signed test report included. Units that don't pass don't ship.
Manufactured to CAT OEM dimensional tolerances. Bolt pattern, shaft diameter, and port positions match factory spec. Average install: 4–6 hours.
Every shipment includes a video inspection recording. You can verify the unit's physical condition before the crate leaves our facility.
12-month warranty from shipment date covering manufacturing defects under rated conditions. Replacement unit or refund — buyer's choice.
Applicable Excavator Models — 130+ Machines Covered
This EP 148-4644 swing drive reduction gearbox fits excavators across 6 weight classes — from mini machines below 10t to heavy units above 50t. Confirm your machine serial number before ordering for serial-specific variants.
| Below 10t | 10–20t | 20–30t | 30–40t | 40–50t | 50t+ |
|---|---|---|---|---|---|
| E307B | E315 | DH220-5 | E330 | DH420-7 | DH500-7 |
| E70B-7 | EX120-5 | DH225-7 | E330C | CE420-6 | EC700 |
| EX60-2 | ZX120 | DH225-9 | E330D | EC460 | — |
| EX60-5 | E200B | DH370-7 | E336D | EC460B | — |
| ZX60 | SK135 | E320C | PC300-7 | PC400-6 | — |
| ZX70 | PC120-6 | E320D | PC360-7 | PC400-7 | — |
| ZX75 | PC160-7 | E318C | PC300-8 | PC450-7 | — |
| ZX80 | TB135 | E319C | PC300-8MO | — | — |
| ZX85 | R130 ✦ | EC210 | SK330-8 | — | — |
| PC40-7 | DH150-7 | EC240 | SK350-8 | — | — |
| PC56 | DH258 | EC240B | EC350 | — | — |
| PC60-6 | HD400-5-7 | EC290 | EC360B | — | — |
| PC60-7 | SH120 | EC290BLC | EC380 | — | — |
| SK55 | SH280 | HD700-7 | R300 | — | — |
| SK60-5 | CX130 | JS200 | R375-7 | — | — |
| SK60-6 | XE150 | PC200-6 ✦ | DH300-7 | — | — |
| SK70 | FR170 | PC200-7 | DX380 | — | — |
| SK75UR | SY135 | PC220-7 | HD1250 | — | — |
| EC55 | LG915 | R210-7 | SH350-5 | — | — |
| SOLAR 55-V | — | CX210 | CASE360 | — | — |
| DH55 | — | SH200 | LG936 | — | — |
| DH60 | — | SK200-5-6 | — | — | — |
| DH80 | — | SK200-8 | — | — | — |
| R60-5 | — | S265FA | — | — | — |
| FR39 | — | LG200 | — | — | — |
| LG6085 | — | LG210 | — | — | — |
| LG907 | — | LG230 | — | — | — |
| SWE35-70 | — | LG200-3 | — | — | — |
| YC35 / YC60-7 / YC65-2 / YC85 | — | LG220-3 | — | — | — |
| — | — | LG225 / LG925 | — | — | — |
| — | — | XE240 / LG240 | — | — | — |
✦ Primary fit. For CAT 320C, 320D, and other variants, send your machine serial number — we'll confirm fit within 4 business hours at no charge.
Where This Swing Reduction Gearbox Is Deployed
Trenching, pile boring, demolition — non-stop 360° swing cycles demand a reliable swing gearbox.
Open-pit loading and overburden removal in abrasive, dusty environments where seal integrity matters.
Irrigation channel work, orchard clearing — seasonal use followed by idle storage.
Stock this OEM-spec swing drive for fleet maintenance and unplanned breakdowns.
After-Sales Support & Warranty Terms
Warranty Coverage: We replace any unit with a confirmed manufacturing defect. 1-year warranty from shipment date. Inspect your order upon arrival and report issues with photos promptly.
What Voids the Warranty: Wrong part ordered, damage from natural disasters, incorrect installation, operation beyond rated load, human-caused damage, corrosion from improper storage, expired warranty.
Order & Shipping Process: Submit part number → quote within 24h → confirm PO → pay deposit → packing → pay balance → ship with full documentation (packing list, commercial invoice, B/L) → track arrival → share feedback.
Frequently Asked Questions
What Customers Say
"Our CAT 320C was down mid-project. Swung fine in the morning, by lunch it was making a noise that sounded like rocks in a blender. Ordered this 148-4644 swing drive reduction gearbox, had it air-freighted, and installed in 5 days. Bolted straight on. The video inspection was a nice touch — my mechanic said 'this is how every part should arrive.' Three months later, still swinging smooth."
"I've bought 'OEM-spec' parts before that fit about as well as my ex-wife's new boyfriend at Thanksgiving dinner. This one? Bolted up first try, no cussing, no shims. Came with a real test report, not a sticker that says 'QC passed' in Comic Sans. My 320D has been swinging daily for 4 months. No leaks. No noise. Ordered a second one just to have on the shelf — not because I'm worried, but because I hate downtime."
Frequently Ordered Together
When a swing drive reduction gearbox fails internally, metal debris enters the swing motor case drain. Replace both to avoid a second failure within 500 hours. OEM-spec units available.
Complete set: output shaft seal, input seal, internal O-rings, and swing post output bearing. Replacing the post bearing when fitting a new gearbox eliminates the most common secondary failure point.
Get Your EP 148-4644 swing Drive Reduction Gearbox
— Quoted Within 24 Hours
A grounded CAT 320C or 320D costs money every hour it sits. This OEM-spec swing reducer is in stock, 100% load-tested, and ready to pack in 4–7 days. No minimum order. Send your machine model, serial number, shipping port, and quantity — and we'll confirm price, lead time, and freight options within 24 hours.
✓ 1-Year Warranty
✓ Video Inspection Provided
✓ Sea / Air / DHL · EXW FOB CIF
📧 [email protected] | 24h quote response | 130+ compatible excavator models
Related Searches
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Детали
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