Kit for protecting at least one seal mounted in a transfer fuel pump

Abstract

A kit (30) for protecting at least one seal mounted in a cavity of a transfer fuel pump, the cavity comprising an opening for receiving a shaft within the cavity, the kit (30) comprising a first tool (40) and a second tool (40), the first tool (40) comprising a first handle (41) and a first protection portion (42), the second tool (50) comprising a second handle (51) and a second protection portion (52), the first and second protection portions (42, 52) being shaped to be inserted into the cavity of the transfer fuel pump when the shaft is received within the cavity.

Description

Technical Field

[0001] The present invention relates to a kit and a related method for protecting at least one seal installed in the cavity of a transfer fuel pump. Background Technology

[0002] It is known that fuel pumps, such as high-pressure direct injection (HDI) diesel fuel pumps, are equipped with transfer fuel pumps. The transfer fuel pump is through which fuel travels from the fuel tank to the combustion chamber of the vehicle's fuel engine. Specifically, the transfer fuel pump regulates the amount of fuel reaching the vehicle's fuel engine. The transfer fuel pump further regulates the amount of other fluids (e.g., oil) reaching the vehicle's fuel engine.

[0003] The transfer fuel pump is provided with a cavity in which a shaft is mounted. The shaft includes at least one recess, which is shaped to cooperate with a stop ring when the shaft is mounted in the cavity.

[0004] To prevent fuel or oil leakage from the cavity, at least one seal is installed within it. During maintenance, when the shaft must be replaced with a new one, at least one seal may be damaged by at least one recess when the new shaft is introduced into the cavity. The same problem occurs when the shaft must be withdrawn from and reintroduced into the cavity during maintenance. In particular, there is a high risk of cutting the seal with at least one recess during the introduction of the shaft during maintenance. Summary of the Invention

[0005] Therefore, the object of the present invention is to solve the above-mentioned problems and provide a kit for protecting at least one seal installed in a cavity of a transfer fuel pump, the cavity including an opening for receiving a shaft within the cavity, the kit including a first tool and a second tool.

[0006] The first tool includes a first handle and a first protective portion.

[0007] The second tool includes a second handle and a second protective portion.

[0008] The first and second protective portions are shaped to be inserted into the cavity of the transfer fuel pump when the shaft is received in the cavity.

[0009] According to the kit for which protection is claimed, at least one seal is protected by a first protective portion and a second protective portion during the insertion of the shaft into the cavity. This reduces the risk of damaging at least one seal during maintenance procedures that require replacing the shaft with a new one. Furthermore, it reduces the risk of damaging at least one seal during maintenance procedures that require removing the shaft from the cavity and reinserting it into the cavity.

[0010] In an embodiment of the kit, the first and second protective portions are substantially semi-cylindrical.

[0011] In an embodiment of the kit, when the first protective portion and the second protective portion are inserted into the cavity, the first length of the first protective portion and the second length of the second protective portion cover the at least one seal.

[0012] In embodiments of the kit, the first thickness of the first protective portion and the second thickness of the second protective portion are in the range of 0.1 mm to 1.5 mm, preferably in the range of 0.4 mm to 0.6 mm.

[0013] In an embodiment of the kit, the first protective portion includes a first flat surface, and the second protective portion includes a second flat surface.

[0014] In an embodiment of the kit, the first tool further includes a first connecting portion disposed between the first handle and the first protective portion, and the second tool further includes a second connecting portion disposed between the second handle and the second protective portion.

[0015] In an embodiment of the kit, the end of the first flat surface is located in an extension of the first connecting portion, the first flat surface being substantially perpendicular to the first connecting portion, and the second flat surface is located in an extension of the second connecting portion, the second flat surface being substantially perpendicular to the second connecting portion.

[0016] In an embodiment of the kit, the first connecting portion is integrally formed with the first handle and the first protective portion, and the second connecting portion is integrally formed with the second handle and the second protective portion.

[0017] In one embodiment of the kit, the first and second tools are made of steel.

[0018] The present invention also relates to a method for protecting at least one seal installed in a cavity of a transfer fuel pump using the kit described above, the cavity including an opening for receiving a shaft within the cavity, the shaft including at least one annular groove, the method comprising the following steps:

[0019] a) Introduce the first and second protective sections into the cavity;

[0020] b) Insert the shaft into the cavity until the at least one annular groove extends beyond the at least one seal;

[0021] c) Apply a pulling force to the first handle of the first tool and the second handle of the second tool until the first and second protective portions are pulled out of the cavity; and

[0022] d) During step c), an oscillating motion is applied to the first tool and the second tool.

[0023] In the method described above, the introduction of a first protective portion and a second protective portion into the cavity increases the initial inner diameter of at least one seal.

[0024] In the method described above, while the shaft is inserted into the cavity, the first protective portion and the second protective portion cover at least one seal. Attached Figure Description

[0025] The invention will now be described by way of example with reference to the accompanying drawings, in which:

[0026] Figure 1 A perspective view of an example of a transfer fuel pump, including a shaft mounted in a cavity, is shown.

[0027] Figure 2 It shows Figure 1 A schematic diagram of the longitudinal section of the transfer fuel pump.

[0028] Figure 3 It shows Figure 1 A side view of the transfer fuel pump, with the shaft removed from the cavity.

[0029] Figure 4 It shows Figure 1 A perspective view of an example of the shaft of a transfer fuel pump.

[0030] Figure 5 An illustration of a device for protecting an installation according to the present invention is shown. Figure 1 A perspective view of a kit of at least one seal in the chamber of a transfer fuel pump.

[0031] Figure 6 It shows Figure 5 A perspective view of the tools in the suite.

[0032] Figure 7 It shows Figure 6 A schematic side view of the tool.

[0033] Figure 8 It shows Figure 6 A schematic back-side view of the tool. Detailed Implementation

[0034] Figures 1 to 3 An example of a transfer fuel pump 10 is shown. The transfer fuel pump 10 includes... Figure 2 and Figure 3The cavity 12 is clearly shown. The shape and dimensions of the cavity 12 are specific to the model of the transfer fuel pump 10. The cavity 12 has, for example, a substantially cylindrical shape. The cavity 12 advantageously extends in the longitudinal direction A. The cavity 12 is defined by sidewalls 13. The cavity 12 is, for example, a blind cavity. The term "blind cavity" is understood to mean a cavity that has only an opening. The shape and dimensions of the cross-section of the cavity 12 are specific to the model of the transfer fuel pump 10. Figure 3 In the example, cavity 12 has a substantially circular cross-section. The substantially circular cross-section of cavity 12 has a diameter D1.

[0035] At least one stop ring 14 and at least one stop pin 16 are disposed within the cavity 12. Figure 3 The example shows two stop rings 14 and one stop pin 16, but any other number of stop rings 14 and stop pins 16 are possible. At least one stop ring 14 and at least one stop pin 16 are mounted on the sidewall 13.

[0036] At least one stop ring 14 has, for example, a substantially annular shape. Advantageously, the outer diameter of at least one stop ring 14 is substantially equal to the diameter D1.

[0037] At least one manufacturing pin 16 has, for example, an elongated shape. At least one manufacturing pin 16 is preferably mounted on the sidewall 13 along the longitudinal direction A.

[0038] The cavity 12 also includes at least one seal 18. Advantageously, the at least one seal 18 has a generally annular shape with an initial inner diameter and an outer diameter. Preferably, the periphery of the at least one seal 18 has a shape and size substantially equal to the cross-section of the cavity 12. The at least one seal 18 comprises a metal component, for example, covered by a deformable material. Alternatively, the at least one seal 18 is specifically made of a deformable material. For example, the deformable material is rubber.

[0039] At least one seal 18 is mounted on the sidewall 13. Preferably, the at least one seal 18 is positioned closer to the opening of the cavity 12 than at least one stop ring 14 and at least one stop pin 16. The cavity 12 may, for example, include a first seal 18 at the opening of the cavity 12 and a second seal 18 between the opening of the cavity 12 and at least one stop ring 14.

[0040] like Figure 1 As shown, shaft 20 is received in cavity 12. Specifically, shaft 20 is introduced through an opening in cavity 12. Figure 4 As clearly shown, the shaft includes a shank 22 and a shaft 24. Advantageously, the shape of the shaft 24 is substantially the same as that of the cavity 12. The diameter of the shaft 24 is advantageously slightly smaller than the diameter D1. The shaft 24 also includes at least one recess 26 and at least one longitudinal groove 28.

[0041] At least one recess 26 extends on the periphery of the rod portion 24. In particular, at least one recess 26 is shaped to receive at least one stop ring 14 when the shaft is installed in its final position within the cavity 12. Advantageously, the number of recesses 26 is equal to the number of stop rings 14 in the cavity 12.

[0042] At least one longitudinal groove 28 is shaped to receive at least one stop pin 16 when the shaft is installed in its final position within the cavity 12. Advantageously, the number of longitudinal grooves 28 is equal to the number of stop pins 16 in the cavity 12.

[0043] During maintenance procedures of the transfer fuel pump, such as repair or maintenance, when the shaft 20 must be reintroduced into the cavity 12, or when the shaft 20 must be replaced with a new shaft 20, at least one seal 18 is at risk of damage. In particular, there is friction between at least one seal 18 and the edge of at least one recess 26. Friction may cause damage or even tearing of at least one seal 18.

[0044] To avoid friction between at least one seal 18 and at least one recess 26, this disclosure provides a kit 30 for protecting at least one seal 18. Figure 5 As shown, kit 30 includes a first tool 40 and a second tool 50.

[0045] The first tool 40 includes a first handle 41 and a first protective portion 42. The first tool 40 also includes a first connecting portion 43.

[0046] The first handle portion 41 is formed of a flat area. The length and width of the first handle portion 41 allow the user of the kit 30 to place at least their fingertips on the first handle portion 41. The length of the first handle portion 41 includes, for example, a range of 10 mm to 30 mm, preferably a range of 15 mm to 25 mm. The width of the first handle portion 41 includes, for example, a range of 8 mm to 20 mm, preferably a range of 10 mm to 15 mm.

[0047] The first connecting portion 43 is disposed between the handle 41 and the first protective portion 42. The first connecting portion 43 and the first handle 41 form a first angle α1. Figure 7 This is clearly shown in the diagram. Advantageously, the first angle α1 is included in the range of 120° to 170°, preferably in the range of 140° to 160°.

[0048] like Figure 5 and Figure 8As best shown, the first connecting portion 43 includes a first large portion 44 and a first narrow portion 45. The first large portion 44 is connected to the first shank 41. The width L1 of the first large portion 44 is substantially equal to the width of the first shank 41. The length of the first large portion 44 includes, for example, the range of 1.5 mm to 3 mm, preferably the range of 2 mm to 2.5 mm. The free edge of the first large portion 44 includes a first notch 46. The first notch 46 allows the manufacturing tool to hold the first tool 40 during the manufacturing process of the first tool 40.

[0049] The first narrow portion 45 is connected to the first protective portion 42. The width N1 of the first narrow portion 45 is smaller than the width of the first large portion 44. For example, the width N1 of the first narrow portion 45 includes a range of 2 mm to 6 mm, preferably a range of 3 mm to 4 mm. Advantageously, the length of the first large portion 44 is shorter than the length of the first narrow portion 45. The length of the first narrow portion 45 includes, for example, a range of 0.5 mm to 1.5 mm, preferably a range of 0.8 mm to 1.2 mm.

[0050] like Figure 6 and Figure 7 As clearly shown, the first protective portion 42 extends along a first longitudinal direction B1 over a first length X1. The first protective portion 42 is shaped to be inserted into the cavity 12 of the transfer fuel pump 10. The first protective portion 42 has, for example, a substantially semi-cylindrical shape. When the first protective portion 42 is inserted into the cavity 12, the longitudinal direction B1 is substantially parallel to the longitudinal direction A of the cavity 12. Preferably, the circumference of the first protective portion is less than half the circumference of the rod portion 24.

[0051] Advantageously, the first protective portion 42 is thin. The first thickness t1 of the first protective portion 42 includes, for example, a range of 0.1 mm to 1.5 mm, preferably a range of 0.4 mm to 0.6 mm.

[0052] More precisely, the first protective portion 42 is shaped to be inserted into the cavity 12, while the shaft 20 is received within the cavity 12. Specifically, the diameter of the first protective portion 42 is substantially smaller than the diameter D1 of the cavity 12. Advantageously, the diameter of the first protective portion 42 is substantially equal to the diameter of the shaft 20. Alternatively, the diameter of the first protective portion 42 is slightly larger than the diameter of the shaft 20. In other words, the shape and size of the first protective portion 42 allow for insertion into the cavity while simultaneously allowing the shaft 20 to advance within the cavity 12.

[0053] Advantageously, the first length X1 is equal to or longer than the distance between the opening of the cavity 12 and at least one seal 18. When several seals 18 are provided in the cavity, the first length X1 is advantageously equal to or longer than the distance between the opening of the cavity 12 and the seal 18 located at the position furthest from the opening. The first protective portion 42 then prevents friction between at least one seal 18 and at least one recess 26. This reduces the risk of damage to at least one seal 18.

[0054] The first protective portion 42 includes a first flat surface 47. The first flat surface 47 extends over the entire first length X1. The first flat surface 47 is located in the substantially central region of the first protective portion 42. In particular, the first flat surface 47 is located in the extension of the first connecting portion 43. More precisely, the first flat surface 47 is located in the extension of the first narrow portion 45. Preferably, the width of the first flat surface 47 is substantially equal to the width N1 of the first narrow portion 45. Advantageously, the first flat surface 47 is substantially perpendicular to the first connecting portion 43.

[0055] The first protective portion 42 engages with the first connecting portion 43 at the first flat surface 47. The first flat surface 47 allows for ensuring that the engagement between the first connecting portion 43 and the first protective portion 42 is stable and can withstand tensile and shear stresses that may be applied when using the kit 30.

[0056] Preferably, the first connecting portion 43 is integrally formed with the first handle portion 41 and the first protective portion 42. Advantageously, the thickness of the first connecting portion 43 and the thickness of the first handle portion 41 are equal to the first thickness t1.

[0057] The second tool 50 is structurally equivalent to the first tool 40. Specifically, the second tool 50 includes a second handle 51 and a second protective portion 52. The second tool 50 also includes a second connecting portion 53.

[0058] The second handle 51 is formed of a flat area. The length and width of the second handle 51 allow the user of the kit 30 to place at least their fingertips on the second handle 51. The length of the second handle 51 is, for example, in the range of 10 mm to 30 mm, preferably in the range of 15 mm to 25 mm. The width of the second handle 51 is, for example, in the range of 8 mm to 20 mm, preferably in the range of 10 mm to 15 mm.

[0059] The second connecting portion 53 is disposed between the second handle portion 51 and the second protective portion 52. The second connecting portion 53 and the second handle portion 51 form a second angle α2. Figure 8 This is clearly shown in the diagram. Advantageously, the second angle α2 is included in the range of 120° to 170°, preferably in the range of 140° to 160°.

[0060] like Figure 5 and Figure 8 As best shown, the second connecting portion 53 includes a second main portion 54 and a second narrow portion 55. The second main portion 54 is connected to the second shank 51. The width L2 of the second main portion 54 is substantially equal to the width of the second shank 51. The length of the second main portion 54 includes, for example, a range of 1.5 mm to 3 mm, preferably a range of 2 mm to 2.5 mm. The free edge of the second main portion 54 includes a second notch 56. The second notch 56 allows the manufacturing tool to be held in place during the manufacturing process of the second tool 50.

[0061] The second narrow portion 55 is connected to the second protective portion 52. The width N2 of the second narrow portion 55 is smaller than the width of the second large portion 54. For example, the width N2 of the second narrow portion 55 includes a range of 2 mm to 6 mm, preferably a range of 3 mm to 4 mm. Advantageously, the length of the second large portion 54 is shorter than the length of the second narrow portion 55. The length of the second narrow portion 55 includes, for example, a range of 0.5 mm to 1.5 mm, preferably a range of 0.8 mm and 1.2 mm.

[0062] like Figure 6 and Figure 7 As clearly shown, the second protective portion 52 extends by a second length X2 along a second longitudinal direction B2. The second protective portion 52 is shaped to be inserted into the cavity 12 of the transfer fuel pump 10. The second protective portion 52 has, for example, a substantially semi-cylindrical shape. When the second protective portion 52 is inserted into the cavity 12, the longitudinal direction B2 is substantially parallel to the longitudinal direction A of the cavity 12. Preferably, the perimeter of the second protective portion 52 is less than half the perimeter of the rod portion 24.

[0063] Advantageously, the second protective portion 52 is thin. The second thickness t2 of the second protective portion 52 includes, for example, a range of 0.1 mm to 1.5 mm, preferably a range of 0.4 mm to 0.6 mm.

[0064] More precisely, the second protective portion 52 is shaped to insert into the cavity when the shaft 20 is received within the cavity 12. Specifically, the diameter of the second protective portion 52 is smaller than the diameter D1 of the cavity 12. Advantageously, the diameter of the second protective portion 52 is substantially equal to the diameter of the shaft 20. Alternatively, the diameter of the second protective portion 52 is slightly larger than the diameter of the shaft 20. In other words, the shape and size of the second protective portion 52 allow for insertion into the cavity while simultaneously allowing the shaft 20 to advance within the cavity 12.

[0065] Advantageously, the second length X2 is equal to or longer than the distance between the opening of the cavity 12 and at least one seal 18. When several seals 18 are provided in the cavity, the second length X2 is advantageously equal to or longer than the distance between the opening of the cavity 12 and the seal 18 placed at the position furthest from the opening. The second protective portion 52 then prevents friction between at least one seal 18 and at least one recess 26. This reduces the risk of damage to at least one seal 18.

[0066] The second protective portion 52 includes a second flat surface 57. The second flat surface 57 extends over the entire second length X2. The second flat surface 57 is located in the substantially central region of the second protective portion 52. Specifically, the second flat surface 57 is located in the extension of the second connecting portion 53. More precisely, the second flat surface 57 is located in the extension of the second narrow portion 55. Preferably, the width of the second flat surface 57 is substantially equal to the width N2 of the second narrow portion 55. Advantageously, the second flat surface 57 is substantially perpendicular to the second connecting portion 53.

[0067] The second protective portion 52 engages with the second connecting portion 53 at the second flat surface 57. The second flat surface 57 allows for a stable engagement between the second connecting portion 53 and the second protective portion 52, and enables it to withstand tensile and shear stresses that may be applied when using the kit 30.

[0068] Preferably, the second connecting portion 53 is integrally formed with the second handle portion 51 and the second protective portion 52. Advantageously, the thickness of the second connecting portion 53 and the thickness of the second handle portion 51 are equal to the second thickness t2.

[0069] Advantageously, the first tool 40 and the second tool 50 are identical in shape and size. Alternatively, the first tool 40 and the second tool 50 may differ in some dimensions. For example, the first tool 40 and the second tool 50 may differ in at least one of the following aspects:

[0070] First angle α1 and second angle α2;

[0071] The width L1 of the first part 44 and the width L2 of the second part 54;

[0072] The width N1 of the first narrow portion 45 and the width N2 of the second narrow portion 55;

[0073] First thickness t1 and second thickness t2;

[0074] The length of the first protective part 42 is x1, and the length of the second protective part 52 is x2.

[0075] The first tool 40 and the second tool 50 are formed, for example, from pre-formed flat sheet metal. For example, the flat sheet metal is a flat sheet of metal that is deformed by stamping until the previously described shapes of the first tool 40 and the second tool 50 are obtained. For example, the first tool and the second tool are made of steel. Preferably, the first tool 40 and the second tool 50 are made of C35 steel or C45 steel. Advantageously, the steel of the first tool 40 and the second tool 50 has a Rockwell hardness ranging from 30 HRc to 45 HRc, preferably from 33 HRc to 43 HRc. Steel imparts optimal mechanical properties to the first tool 40 and the second tool 50. Furthermore, steel is not expensive compared to other materials that impart similar mechanical properties.

[0076] Optionally, the first tool 40 and the second tool 50 are made of polymer or composite material.

[0077] A method for protecting at least one seal 18 installed in the cavity 12 by means of kit 30 will now be described.

[0078] First, the method includes the step of introducing a first protective portion 42 and a second protective portion 52 into the cavity 12. Specifically, the first protective portion 42 and the second protective portion 52 are introduced into the cavity 12 before the shaft 20 is introduced. Since the first length X1 and the second length X2 are equal to or longer than the distance between the opening of the cavity 12 and at least one seal 18, the first protective portion 42 and the second protective portion 52 cover at least one seal 18. The introduction of the first protective portion 42 and the second protective portion 52 allows at least one seal 18 to deform. Specifically, the introduction of the first protective portion 42 and the second protective portion 52 into the cavity 12 increases the initial inner diameter of at least one seal 18. The initial inner diameter of at least one seal 18 is increased, for example, by a value equal to the sum of the first thickness t1 and the second thickness t2. For example, if both the first thickness t1 and the second thickness t2 are equal to 0.5 mm, the initial inner diameter of at least one seal 18 increases by 1 mm.

[0079] An increase in the initial inner diameter of at least one seal 18 allows the shaft 20 to be introduced into the cavity 12, even though the first protective portion 42 and the second protective portion 52 are inserted into the cavity 12. Therefore, the rod portion 24 is introduced into the cavity 12 between the first protective portion 42 and the second protective portion 52.

[0080] When the shaft 20 is inserted into the cavity 12, the first protective portion 42 and the second protective portion 52 cover at least one seal 18. Specifically, the first protective portion 42 and the second protective portion 52 remain within the cavity 12 until at least one annular groove 26 of the stem 24 has passed over at least one seal 18. When a plurality of annular grooves 26 are provided on the stem 24, the first protective portion 42 and the second protective portion 52 are retained within the cavity 12 until the annular groove 26 closest to the handle 22 has passed over each seal 18. Friction between at least one seal 18 and at least one annular groove 26 is then avoided by the first protective portion 42 and the second protective portion 52.

[0081] As each annular groove 26 has passed each seal 18, the first protective portion 42 and the second protective portion 52 are withdrawn from the cavity 12. To withdraw the first protective portion 42 and the second protective portion 52, a pulling force is applied to the first handle 41 and the second handle 51. Advantageously, since the circumference of the first protective portion 42 and the second protective portion 52 is less than half the circumference of the rod 24, at least one space (not shown) is maintained between the first protective portion 42 and the second protective portion 52 when the rod 24 is inserted into the cavity 12. This space allows the first tool 40 and the second tool 50 to rotate about the longitudinal direction A. When a pulling force is applied to the first handle 41 and the second handle 50, the oscillating motion of the first tool 40 and the second tool 50 about the longitudinal direction A facilitates the withdrawal of the first protective portion 42 and the second protective portion 52.

[0082] Once the first protective part 42 and the second protective part 52 are disengaged from the cavity 12, the shaft 20 can be pushed until it reaches its final position within the cavity 12.

[0083] Since the first protective portion 42 and the second protective portion 52 are thin, at least one seal 18 can restore its initial inner diameter when the first protective portion 42 and the second protective portion 52 are removed from the cavity 12.

[0084] Finally, the first tool 40 and the second tool 50 ensure that the extraction of the first protective portion 42 and the second protective portion 52 is not blocked by the handle 22 of the shaft 20.

[0085] List of reference numerals

[0086] Longitudinal direction of cavity A

[0087] B1 First longitudinal direction

[0088] B2 Second longitudinal direction

[0089] The diameter of the basic circular cross-section of cavity D1

[0090] The width of the first part of L1

[0091] L2 Width of the Second Largest Section

[0092] N1 Width of the first narrow section

[0093] N2 width of the second narrow section

[0094] t1 First Thickness

[0095] t2 Second thickness

[0096] α1 First Angle

[0097] α2 Second angle

[0098] X1 First Length

[0099] X2 Second Length

[0100] 10 Transfer fuel pump

[0101] 12 cavities

[0102] 13. Side walls of the cavity

[0103] 14 Stop ring

[0104] 16 Manufacturing and Sales

[0105] 18. Seals

[0106] 20-axis

[0107] 22 Shaft Handle

[0108] 24-axis rod section

[0109] 26 Annular groove

[0110] 28 Longitudinal grooves

[0111] 30 kits

[0112] The first tool in the 40-kit

[0113] 41 First handle

[0114] 42 First Protection Part

[0115] 43 First connecting part

[0116] 44 Part One

[0117] 45 First narrow section

[0118] 46 First notch

[0119] 47 First flat surface

[0120] The second tool in the 50 kit

[0121] 51 Second handle

[0122] 52 Second Protection Part

[0123] 53 Second Link Part

[0124] 54 Part Two

[0125] 55 Second Narrow Section

[0126] 56 Second notch

[0127] 57 Second flat surface

Claims

1. A kit (30) for protecting at least one seal (18) installed in a cavity (12) of a transfer fuel pump (10), the cavity (12) including an opening for receiving a shaft (20) within the cavity (12), the kit (30) including a first tool (40) and a second tool (50). The first tool (40) includes a first handle (41) and a first protective part (42). The second tool (50) includes a second handle (51) and a second protective part (52). The first protective portion (42) and the second protective portion (52) are shaped to be inserted into the cavity (12) of the transfer fuel pump (10) when the shaft (20) is received in the cavity (12), and in, The lengths of the first protective portion (42) and the second protective portion (52) are equal to or longer than the distance between the opening of the cavity (12) and the seal located at the position furthest from the opening, and The first tool (40) further includes a first connecting portion (43), which is disposed between the first handle (41) and the first protective portion (42). The first connecting portion (43) includes a first large portion (44) and a first narrow portion (45), wherein the width of the first narrow portion (45) is equal to the width of the first flat surface (47) of the first protective portion (42).

2. The kit (30) according to claim 1, wherein, The first protective portion (42) and the second protective portion (52) are semi-cylindrical.

3. The kit (30) according to claim 1 or 2, wherein, When the first protective portion (42) and the second protective portion (52) are inserted into the cavity (12), the first length (X1) of the first protective portion (42) and the second length (X2) of the second protective portion (52) cover the at least one seal (18).

4. The kit (30) according to claim 1 or 2, wherein, The first thickness (t1) of the first protective portion (42) and the second thickness (t2) of the second protective portion (52) are in the range of 0.1 mm to 1.5 mm.

5. The kit (30) according to claim 1 or 2, wherein, The second protective portion (52) includes a second flat surface (57).

6. The kit (30) according to claim 5, wherein, The second tool (50) also includes a second connecting portion (53) disposed between the second handle (51) and the second protective portion (52).

7. The kit (30) according to claim 6, wherein, The end of the first flat surface (47) is located in the extension of the first connecting portion (43), the first flat surface (47) is perpendicular to the first connecting portion (43), and the second flat surface (57) is located in the extension of the second connecting portion (53), the second flat surface (57) is perpendicular to the second connecting portion (53).

8. The kit (30) according to claim 7, wherein, The first connecting portion (43) is integrally formed with the first handle portion (41) and the first protective portion (42), and the second connecting portion (53) is integrally formed with the second handle portion (51) and the second protective portion (52).

9. The kit (30) according to claim 1 or 2, wherein, The first tool (40) and the second tool (50) are made of steel.

10. The kit (30) according to claim 4, wherein, The first thickness (t1) of the first protective portion (42) and the second thickness (t2) of the second protective portion (52) are in the range of 0.4 mm to 0.6 mm.

11. A method for protecting at least one seal (18) in a cavity (12) of a transfer fuel pump (10) by means of a kit (30) according to any one of claims 1 to 10, the cavity (12) including an opening for receiving a shaft (20) within the cavity (12), the shaft (20) including at least one annular groove (26), the method comprising the steps of: a) Introduce the first protective portion (42) and the second protective portion (52) into the cavity (12); b) Insert the shaft (20) into the cavity (12) until at least one annular groove (26) extends beyond the at least one seal (18). c) Apply a pulling force to the first handle (41) of the first tool (40) and the second handle (51) of the second tool (50) until the first protective portion (42) and the second protective portion (52) are pulled out of the cavity (12); and d) During step c), a swinging motion is applied to the first tool (40) and the second tool (50).

12. The method according to claim 11, wherein, Introducing the first protective portion (42) and the second protective portion (52) into the cavity (12) increases the initial inner diameter of the at least one seal (18).

13. The method according to claim 11 or 12, wherein, When the shaft (20) is inserted into the cavity (12), the first protective portion (42) and the second protective portion (52) cover the at least one seal (18).

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