Bosch 5302 Technical Information download pdf (Page 34)

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Workshop Manual__3 - 4 LD_cod. ED0053025560_4° ed_ rev. 03

Fuel injection circuit

Injection pump

Components:

1 Delivery tting 11 Spring

2 O-ring 12 Pumping piston

3 Spring 13 Tappet case

4 Delivery valve 14 External roller

5 Gasket 15 Internal roller

6 Barrel 16 Pin

7 Pump case 17 Lock ring

8 Eccentric 18 Rack rod

9 Sector gear 19 Lock pin

10 Spring bearing cap 20 Collar

Tighten the pump at its base at 30 Nm.

Injection pump assembly

Insert the cylinder 6 in the pump case 7, engaging the slot A in

the eccentric 8.

Insert the delivery valve 4, copper gasket 5, spring 3 O ring 2,

then tighten the tting at 3.5 ÷ 40 Nm.

Assemble the rack rod 18 and sector gear 9 coinciding points B.

Insert the upper collar 10, spring 11 and piston 12 with

reference C on the same side of the slot A (if it is assembled on

the opposite side, the engine revs out).

Assemble the collar 20, the tappet 13 with rollers 14, 15 and

pin 16.

While pressing on the tappet, insert the pin 19 and the ring 17.

Advanced injection (static)

Disconnect the diesel oil thrust pipe tting, being careful not to

loosen also the pump delivery tting 1, then screw the tester for

the advanced injection check 2.

Fill the tank, checking that the fuel level is at least 10 cm above

the tester. Place the accelerator lever halfway.

Turn the ywheel towards the engine rotation direction and make

sure that the fuel arrives at the tester assembled on the injection

pump delivery tting.

Repeat this operation; during the compression phase, operate

slowly and immediately stop when the fuel moves into the tester

hole; move the ywheel 3 mm back; this is the static advanced

injection.

If C does not coincide with B but comes before, add some

shims under the pump, otherwise, remove the shims if C is

beyond B.

Note: By removing or adding a 0.1 mm shim under the pump, it

is possible to delay or advance C, which is after B.

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Bosch 5302 Technical Information Page 34

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