WESPC Valve Seat Inlet CH12581 For Perkins 1106C 1106D Diesel Engine

WESPC Valve Seat Inlet CH12581 For Perkins 1106C 1106D Diesel Engine

Application:

Valve Seat Inlet CH12581 is press-fitted into the cylinder head of Perkins 1106C/1106D 6-cylinder 6.0 L diesels and earlier 1006.6 and T4.236/AT4.236 4.0 L turbocharged engines that power JCB 3CX/4CX back-hoe loaders, JCB 535-95/540-170 telescopic handlers, Manitou MLT 1440 telehandlers, Terex TLB 840, Massey Ferguson 6465/6470/7480 tractors, McCormick MTX/MCX range, Landini Legend and Atlantis models plus 120–400 kVA generator sets and compact wheel loaders. Because the 38 mm OD, 7° 45′ external taper and 1.6 mm interference fit are dimensionally identical to legacy 4.236 heads, the same CH12581 insert covers forty years of 4- and 6-cylinder Perkins production, giving one service solution for vintage combines, forklifts and irrigation pumps still operating worldwide.

Technical specifications:

Overall diameter 38.0 mm, seat width 2.0 mm, seat angle 45°, counter-bore 32 mm, depth 8.5 mm, interference 0.05–0.08 mm on 38 mm head pocket. The insert is machined from centrifugally-cast low-carbon Cr-Mo-V alloyed iron (Hardness 350–400 HB) with 0.6 % free graphite for self-lubrication and a 0.3 mm radial oil groove that aligns with the head oil gallery, ensuring positive splash lubrication to the valve stem and reducing the risk of micro-welding during cold start.

Material & performance features:

The alloy matrix retains 90 % of its yield strength at 820 °C, so the seat survives continuous exhaust peaks during DPF regeneration without radial cracking. The 45° face is induction-hardened to 550 HB 1 mm deep, limiting valve recession to 0.025 mm per 1000 h in engines running high-biodiesel blends, while the graphite film cuts seating wear by 30 % compared with plain grey iron.

Interchange part numbers:

CH12581, CH12580 (exhaust seat), CH12583 (valve guide), CH12626 (inlet valve), CH12627 (exhaust valve), CH10019 (valve collet), CH12475 (inner spring), CH12754 (outer spring), 02001596, 788083-151 through 788083-200, 2415H545, CV24480, 135606381, 135616620, 135617600, T431095, 2415A131, 3311A053, MP10248, 3688C018, 3688A034, 2415D002, 2413695, 33817135, 3689A502, 21825580, 2110/050.

WESPC(Dongguan)Tech Co., Ltd. is a wholly-owned subsidiary of WESPC Hong Kong.

The company has long been deeply engaged in the Perkins aftermarket spare parts sector, while also covering a wide range of multi-brand engines and related components. With years of professional expertise and a solid reputation, WESPC provides customers with diverse, one-stop solutions tailored to their needs.

Leveraging the global vision of its Hong Kong headquarters and the strategic location advantages of Dongguan, WESPC Dongguan is committed to building a highly efficient and reliable supply chain system, supported by professional technical expertise and comprehensive after-sales services, to continuously create greater value for its customers.

Looking ahead, the company will continue to expand its business landscape, keep pace with industry trends, and consistently enhance product and service quality—working hand in hand with global partners to achieve mutual growth and success.