Tuthill 3C81 Mounting Foot for 3C2B and 4C2B Gear Pumps
The Tuthill 3C81 is a genuine mounting foot for Tuthill 3C2B and 4C2B cast iron gear pumps. A bolt on foot turns a flange mounted pump into a base mounted one, carrying the weight of the pump and the piping load away from the drive so the shaft is not asked to take it. It is a straightforward casting, but it is the part that decides whether the pump sits square and stays that way.
The C Series feet run in size pairs, with 2C81 covering the 2C2B, this 3C81 covering both the 3C2B and the 4C2B, and 5C81 covering the 5C2B and 6C2B. A bolt on foot is what turns a flange mounted C2B into a base mounted unit without changing the pump. Piping strain is the quiet killer on a small gear pump. Support the suction and discharge lines independently so the pump is not holding them up, and check that the mounting surface is flat before anything is bolted down.
Key Features
- Genuine Tuthill mounting foot
- Direct fit for 3C2B and 4C2B builds
- Carries pump and piping weight away from the drive shaft
- Published hole pattern lets a base plate be drilled in advance
- Cast construction sized to the pump it serves
- Ordered separately from the pump end
Applications
- Lubrication circuits on compressors, gearboxes and engines
- Burner oil and fuel oil transfer and circulation
- Low pressure hydraulic supply circuits
- Heat transfer oil and quench oil service
- Scheduled overhaul of Tuthill rotary gear pumps
- Spares holding for equipment that cannot afford downtime
Specifications
- Brand: Tuthill
- Manufacturer Part Number: 3C81
- Part Type: Mounting Foot
- Fits: Tuthill 3C2B and 4C2B cast iron gear pumps
- Quantity Required: 1
- Condition: New
Frequently Asked Questions
Q: Can I mount the pump on its side?
Check the orientation guidance for your build. Port position affects priming, and the service instructions call for both ports facing upward where possible.
Q: Is this included with the pump?
No. Mounting feet and adapters are listed options and are ordered separately from the pump end.
Q: Will a foot from another pump size fit?
No. The feet run in size groups and the hole pattern changes with the frame, so the foot has to match the pump size.
Q: Does using a foot change the pump rating?
No. It changes how the pump is supported, not what it can do.
Not sure this is the right part? Send us a Picture of the Pump Plate on your pump and the CLR Marine team will confirm the correct mounting foot.
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