WESPC Diesel Engine 2641A312 Fuel Injection Pump For Perkins 1103C-33T Engine Parts
| Brand Name | WESPC |
| Place of Origin | China |
Part Number | 2641A312 |
| After-sales Service Provided | Video Technical Support, Online Support |
| Marketing Type | Ordinary Product |
| Certificate | ISO9001 |
| Warranty | 1 Year |
| Stock | Yes |
Application:
The 2641A312 rotary distributor pump is purpose-built for Perkins
1103C-33T and 1104C-44T mechanical-injection turbo-diesel engines
(3.3 L and 4.4 L) that drive Massey Ferguson 3400-series and
5400-series tractors, Landini Rex 4-100/110 and Powerfarm 105/115
models, JCB 3CX backhoe loaders and 530-70 Loadall telescopic
handlers, as well as FG Wilson P18-6 and Pramac GSW65P enclosed
generator sets. These engines deliver 60–85 kW at 2 200 r/min while
meeting EU Stage II and EPA Tier 2 emission limits, so the pump
provides accurate fuel metering for high-torque rise, smoke-free
acceleration and dependable cold-start performance in agricultural,
construction and standby-power sectors.
Technical specifications:
The pump body is a single-piece, close-grain cast-iron monobloc
with integral cam ring and distributor head, centre-line mounting
flange to SAE J744 size 2, pilot Ø101.6 mm, four M10 threaded holes
on 146 mm PCD. Plunger diameter is 10 mm with 9.5 mm stroke,
generating injection pressures up to 1 450 bar; an internal
positive-displacement vane feed pump supplies 125 L/h at 400 kPa. A
hydraulic automatic advance piston provides 7° crank-angle advance
from 1 000 to 2 400 r/min. Drive hub accepts 12 mm Woodruff key and
is dynamically balanced to ISO 1940 Grade G2.5. Static timing is
11° BTDC ± 1° with ± 3° fine adjustment via eccentric cam ring. All
external seals are FKM (Viton) compound for compatibility with
biodiesel blends up to B20 and arctic-grade diesel down to −40 °C.
Material & performance features:
Plunger and distributor rotor are machined from vacuum-remelted
18CrNiMo7-6 alloy steel, carburised to 0.9 mm effective case depth
and super-finished to 0.15 µm Ra for minimal leakage and
exceptional durability under cyclic 1 450 bar loading. Cam-ring
lobes are induction-hardened to 60–64 HRC, while roller tappets
receive a diamond-like carbon (DLC) coating that reduces boundary
friction by 30 % and extends fatigue life. A lightweight aluminium
governor sleeve with PTFE-impregnated bore eliminates stick-slip
and maintains idle stability within 2 % of set speed. High-pressure
steel galleries are laser-welded to prevent internal pressure loss,
and the electromagnetic fuel-stop solenoid is encapsulated in a
glass-fiber-reinforced polyamide housing rated IP67 for dust and
moisture protection. An integral viscous torsional vibration damper
limits peak twist to <0.12°, protecting both pump and engine
gear-train from resonance wear and noise.
Interchange part numbers:
PERKINS 2641A312, 2641A313, 2641A314; MASSEY FERGUSON 3638729M91,
3638730M91; LANDINI 747610M91, 747611M91; JCB 331/20301, 331/20302;
FG WILSON 10000-45218; PRAMAC 6000-45218; reference equivalent to
1-12320-740-0 and 04279-0L090 assemblies.
