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Shop Engine Lower End Oil Pumps Oil Pumps Complete
CHP Oil Feed Pumps for Flatheads

CHP Oil Feed Pumps for Flatheads

Oil pump by Cala’s High Performance; fits 45”/750 cc Flathead 1937-1973, except K-models; cast iron / steel; with gaskets; replaces OEM HD 26203-37; Sweden; gross weight: 940 g
Oil pump by Cala’s High Performance; fits 45”/750 cc Flathead 1937-1973, except K-models; cast iron / steel; with gaskets; replaces OEM HD 26203-37; Sweden; gross weight: 940 g
Oil pump by Cala’s High Performance; fits 45”/750 cc Flathead 1937-1973, except K-models; cast iron / steel; with gaskets; replaces OEM HD 26203-37; Sweden; gross weight: 940 g
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Inline Gallery Thumbnail
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Select variant:
62-097
fits 45”/750 cc Flathead 1937-1973, except K-models
62-095
fits Big Twin Flathead 1937-1948
Price and stock:
Item №
62-097
Price incl. VAT
899.70 €
Available
10
Ready for immediate delivery from our Würzburg, Germany warehouse
The price includes 143.65 € German VAT.
kit
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Facts
Description
  • Oil pump by Cala’s High Performance
  • fits 45”/750 cc Flathead 1937-1973, except K-models
  • cast iron / steel
  • with gaskets
  • replaces Harley-Davidson part number HD 26203-37
  • Sweden
  • gross weight: 940 g

On Harley-Davidson Flathead engines, such as the UL and WL models, the engine can overheat under heavy load because the flow rate and pressure of the original oil pump are limited. The CHP high-performance oil pump solves this problem: it retains the classic stock pump design but works internally with modern gerotor technology, significantly improving the efficiency of the lubrication system.

  • Typical oil pressure on a hot engine: approx. 30 psi (instead of 5 psi with the stock pump)
  • Flow rate: approx. 1 liter in 45 seconds (instead of 7–10 minutes with the original pump)

The result is a cooler, smoother-running engine that is reliably lubricated even with performance upgrades. Installation is simple, identical to the original pump, so no additional modifications are required.

Due to the substantially increased volume on the feed side it is recommended to upgrade the scavenger system with the CHP scavenger pump conversion kit.

Accessories:

CHP Scavenger Pump Conversion Kit for Flatheads

CHP Scavenger Pump Conversion Kit for Flatheads

With the CHP pump installed oil feed volume is substantialy increased and the stock scavenger system might reach its limit. This conversion kit for the scavenger pump raises volume by about 40% for a more effective oil return. It includes all necessary longer small parts.
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CHP Heavy Duty Relief Springs for Flatheads

CHP Heavy Duty Relief Springs for Flatheads

For performance engines. These special relief valve springs are a tad stiffer than the standard springs in CHP Flathead oil feed pumps and will raise oil pressure by 5 psi.
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CHP Scavenger Pumps for Flatheads

CHP Scavenger Pumps for Flatheads

The CHP return pump is the ideal complement to the CHP high-performance oil pump, designed to balance its increased flow rate. With wider gears, the return capacity is increased by about 40%, ensuring more efficient oil circulation within the engine....
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See also:

Cannonball Big Twin Flathead Crankcases

Cannonball Big Twin Flathead Crankcases

Reproduction crankcases which meet or exceed highest restoration demands. Cast from state-of-the-art materials and machined on CNC equipment for strength and precise fitment. Intended to work with stock or identically constructed engine components. Finished and detailed like the original counterparts so these cases will smoothly blend into your old mill to give it a new life. For ease of installation both case halves are carefully matched and feature pre-installed case bushings, which are line bored and lapped for standard rollers. Cam bushings are already in place and reamed. (For exact measures pls see facts)....
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Aluminum Cylinder Heads

Aluminum Cylinder Heads

Aluminum cylinder heads for side-valve engines. In air-cooled engines, material with good heat dissipation is of great importance. When heat builds up, it results in power loss. Higher compression is meant to produce more power, but higher-compression engines run hotter. That’s why, starting in 1940, Harley-Davidson equipped the higher-compression side-valve engines (5:1 and above, with the standard being 3.6:1–4.5:1) with aluminum cylinder heads. Aluminum dissipates heat better than cast iron. The heads offered are supplied in pairs.
more …
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Have any questions?

Our service team will be glad to help out: Mondays - Thursdays 08:00-17:00 CET, Fridays 08:00-16:00 CET, Phone: +49 / 931 250 61 16, eMail: service@wwag.com