Repair Kits for AC Mechanical Fuel Pumps (2024)

Fuel pump repair kit information

DISMANTLING

Before commencing to dismantle the pump, thoroughly clean the exterior and make a file markacross the two flanges of the pump housing, as a guide when re-assembling.

Remove the six securing screws and separate the two halves of the main casting.

Turn the diaphragm, and pull rod assembly through an angle of 90°, when it may be disconnected fromits securing slot in the connecting link and withdrawn. Remove diaphragm spring.

Withdraw the valve retainer screws from inside the upper casting and remove the retainer plate, valveassemblies, and valve retainer gasket.

On latest type pumps, valve retaining plates are omitted, the valve assemblies being a light tap fitinto the casting.

CLEANING AND INSPECTION OF PARTS

All pump parts must be thoroughly cleaned in order to ascertain their condition. Wash valves, upper castings, filters and other parts which come intocontact with the fuel in a clean paraffin bath separate from that used for dirtier components.

Upper and lower pump castings should be examined for cracks or damage. AC Repair Kits contain the items normally needed for fuel pump 'first aid' repairand all of these should be used on each job, the corresponding worn parts being discarded.

RE-ASSEMBLY

Replace valve retainer gasket, valves, valve retainer, and secure in position with two retaining screws, ortap new valves into recesses on latest pump types.

Replace filter gauze and cork seating gasket in position. Refit filter bowl.

Place the diaphragm spring in position in the pump body. Place the diaphragm assembly over the spring(the pump rod being downwards) and centre the upper end of the spring in the lower protector washer.When fitting the diaphragm assembly the small locating tabs should be at position 'A' shown in the illustration. The diaphragm assembly should thenbe pushed down until the flattened end of the pull rod enters the slot in the link and then turned a quarterturn to the left until the diaphragm locating tabs are at

position 'B' and then they will be in line with the locating mark cast on pump body. The sub-assemblies ofthe pump are now ready for fitting together, and this is carried out as follows:

Push the rocker arm towards the pump until the diaphragm is level with the body flanges.

Place the upper half of the pump into the proper position, as shown by the mark made on the flangesbefore dismantling. Install the cover screws and spring washers and tighten until the heads of thescrews just engage the washers.

IMPORTANT

Before finally tightening the cover screws, the rocker arm must be held at its inward positionpreferably using a short piece of tube as shown in the illustration. Sufficient pressure must beexerted to draw the diaphragm inwards until its edges no longer protrude beyond the pump flanges.

While the rocker arm is so held, the cover screws should be securely tightened, working from sideto side so as to keep the pressure even.

Identification of Fuel Pump Types

UH - Standard type of pump for engines over 1,200 c.c. Detachable valve assemblies and visible side filter. Mounting stud holes arranged diagonally

FH - As UH but mounting holes side by side.

UH - Standard type of pump for without filter. Mounting stud holes arranged diagonally

FH - As UE but mounting holes side by side.

U - Standard type of pump with metal filter cover. Mounting stud holes arranged diagonally

UF - As U but mounting holes side by side.

UG - Standard type of pump with glass filter bowl on top. Mounting stud holes arranged diagonally

FG - As UG but mounting holes side by side.

T - Wearly type standard size with separate valves and pump. Mounting stud holes arranged diagonally

TF - As type T but glass filter bowl on top.

TF - As type T but mounting holes side by side.

Y - Small size pump for engines up to 1,200 c.c. Mounting stud holes side by side

YD - As type Y but later design detachable valve with assemblies.

YJ - As YD but no filter.

Pipe Unions

Assembly Part No. Comprising Union, Nut and Sleeve	PARTICULARS OF UNION				Union Nut	Pipe Sleeve (if used)	Remarks
Assembly Part No. Comprising Union, Nut and Sleeve	Part Number	Description	Thread into Pump	Thread for Union Nut	Union Nut	Pipe Sleeve (if used)	Remarks
114795	114626	1/4" Straight, for pipe sleeve	1/8" x 27*	7/16" x 24	114527	114628
114796	114629	5/16" Straight, for pipe sleeve	1/8" x 27*	1/2" x 24	1524190	114631
114797	114633	5/16" Elbow, for pipe sleeve	1/8" x 27*	1/2" x 24	1524190	114631
114798	114632	1/4" Elbow, for pipe sleeve	1/8" x 27*	7/16" x 24	114627	114628
	856810	5/16" Straight, for soldered nipple	1/8" x 27*	1/4" Gas			Uses Washer 851011
	1524114	5/16" Straight, for soldered nipple	1/2" x 20	1/4" Gas			Uses Washer 855136
	1524730	1/4" Straight, for pipe sleeve	1/2" x 20	7/16" x 24	114627	114628	Conical seat, in pump
	1524729	5/16" Straight, for pipe sleeve	1/2" x 20	1/2" x 24	1524190	114631	Conical seat, in pump
	1524328	1/4" Straight, for flared pipe	1/2" x 20	7/16" x 24			Uses Washer 855136
	1524322	5/16" Banjo, for pipe sleeve	1/2" x 20	1/2" x 24	1524190	114631	Also uses - Bolt 1524323 Washer 855136 (2)
* N.P.T.F.	1524555	1/4" Banjo, for pipe sleeve	1/2" x 20	7/16" x 24	114627	114628	Ditto

Engine Pad Gaskets

835683 (.015)
856693 (.025)
for B, M, T, TG, U, UE, UG, UH Pumps

835686
for B, T, U Push Rod Operated Pumps

1524686
Fabric Oil Control Gasket for T, TG, U, UE, UG, UH Pumps

1411094
for W, WE, WG, WH Pumps

856794
for Y, YD, and YJ Pumps

7950366
Fabric Oil Control for TF, UF, FE, FG, FH Pumps

7950173
for TF, UF, FE, FG, FH Pumps

While every care has been taken in the compilation of this publication, no responsibility can be accepted for any inaccuracies which may have arisen.

Supplementary notes on AC Fuel/Vacuum Pump repair

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'The AC Fuel Pump' A 1954 article by LD Atkin on rebuilding AC fuel pumps

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Reconditioning Early AC Petrol Pumps 1956 article by E S Brown

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Spares Lists and Diagrams for AC Pump Types T, TF, TG, WE, WG, U, UF, UG, UE, Y

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Search in Repair Kits for AC Mechanical Fuel Pumps

We supply Repair Kits for AC Mechanical Fuel Pumps for all makes of vintage and classic vehicle from AEC and Allis-Chalmers to Volkswagen and Volvo. To assist with part identification, we have compiled application data for a selection of the most popular makes and model of vehicle. Please search below by make, then model and age, or engine capacity and bore size.

If your make or mode of vehicle is not covered by our search facility, please email with details of your requirement (Make, Capacity, Bore Size, Model and Year) and we will provide links to the correct parts where available.

FPBD1 - AC Fuel Pump repair kit equivalent to BD1

From £35.15 (£42.18 inc. VAT @ 20%)

AC Fuel Pump repair / rebuild kit for all T, TF and TG type pumps fitted to Austin, Bedford, Commer, Ford, Hillman, Rover and Vauxhall. Kit contains (3 .1/4" outer diameter) - (1. 3/4" length...

Comparable to other manufacturer part numbers - BD1, 1524287, ES2901