Secondary Air Filter C 1281 for Kobelco, JCB, SANY — 117 mm OD
Secondary air filter element KA33511, 117 mm outer diameter, 149 mm at the end, 88 mm inner diameter with a 17 mm centre bore, 329 mm overall height. Interchanges with MANN C 1281, Hengst E570LS, Fleetguard AF490M and Donaldson P119374. It mounts inside the primary element C 24 719 on excavators and loaders.
📋 Key Specs
| Part Number | KA33511 |
| Filter Type | Secondary air filter element, safety element |
| Outer Diameter | 117 mm |
| Outer Diameter 1 | 149 mm at the outlet end |
| Inner Diameter | 88 mm |
| Inner Diameter 1 | 17 mm centre bore |
| Overall Height | 329 mm |
| Media | Cellulose with support mesh |
| Packaging | 1 piece |
❓ FAQ
Secondary safety element. It mounts inside the primary C 24 719 and only filters the air that gets past the primary if that element is damaged or not seated.
Yes. KA33511 matches C 1281 on all five dimensions: 117 mm outer diameter, 149 mm outer diameter at the end, 88 mm and 17 mm inner diameters, 329 mm overall height.
Yes, when the primary is due. A safety element is only meant to sit behind a healthy primary, so fitting a new one against a clogged or damaged C 24 719 gives no extra protection.
Kobelco K and KW excavators, JCB 400 series loaders and Fastrac tractors, SANY SY excavators, Liebherr R 900, Caterpillar 300 series, Komatsu PC and WA, plus Renault Trucks G and Manager using 00 03 564 115.
No. The safety element has a much smaller dust capacity and is not designed to carry the full dirt load. Running without the primary lets it load up quickly and then dust passes to the engine.
MOQ varies by product: 5–100 units for standard parts (see product page). Tier pricing decreases with volume. Custom parts usually ≥ 50 units, evaluated by process.
Stock/short-run: 7–15 days; bulk orders 20–35 days; custom 30–45 days incl. sampling. Note your deadline in the inquiry — sales will confirm capacity.
Add products to the inquiry list and submit with contact info. Sales contact you within 24h and issue a formal quotation (tier pricing + proforma invoice) within 48h. The AI assistant can pre-fill inquiries in chat.
Yes. We develop from drawings/samples and support private labeling. Process: evaluation → sampling (15–25 days) → approval → mass production.
Payment: T/T 30% deposit + 70% before shipment / L/C / Trade Assurance. Shipping: FOB Ningbo/Shanghai, CIF or DDP; EU & NA warehouses; sea/air/express.
ISO 9001 & IATF 16949; CE/UL/ATEX on key products. Every batch ships with inspection reports; third-party inspection (SGS/BV) supported.
Description
Product Overview
KA33511 is the secondary safety air filter element that mounts inside the primary element on Kobelco, JCB, SANY and Liebherr machines. It measures 117 mm outside diameter, 149 mm at the end, 88 mm main inner diameter with a 17 mm centre bore, and 329 mm overall height. A safety element is not a spare primary: it filters only the air that reaches the engine if the primary is damaged, missing or badly seated, and the primary it fits is C 24 719.
