Fuel Pump Push-Rod; Injection Pump Plug Nuts And Control Rods; Oil Pump; Tappets And Push Rods - Kohler KD 425-2 Workshop Manual

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KD425-2 Workshop Manual_cod. ED0053031750_1° ed_ rev. 00
Ø 9,986 - 9,996
Checks and overhaul

Tappets and push rods

Make sure that the tappet surfaces (fig.32) are free from wear
and present no signs of scoring or seizure, otherwise, renew.
Assembly clearance between tappets and their housings should
be:
Fitting mm
0,07 ÷ 0,041
The push rods must be straight and with the spherical surfaces
at either end in good condition (fig.32).
Make sure that the lubrication holes inside the tappets and push
rods are free of dirt.

Injection pump plug nuts and control rods

Renew the parts if the surface wear is greater than 0.10mm
(fig.33).
Assembly clearance between control rods and their housings in
the crankcase:
Fitting mm
0,02 ÷ 0,059

Fuel pump push-rod

Check that the surfaces of the fuel pump push-rod, fig. 34, are
free of wear, scoring, or signs of seizure, otherwise, renew.
Assembly clearance between fuel pump push-rod and its
housing in the crankcase:
Fitting mm
0,05 ÷ 0,098

Oil pump

Check the rotors and renew them if they have worn lobes
or centres. Check the extent of pump wear by taking the
measurements indicated in figure 35.
Measurement Dimensions mm
A 29,72
B 40,551
C
17,92
Max. wear mm
0,10
Max. wear mm
0,10
Max. wear mm
0,120
Max. wear mm
÷ 29,77 29,65
÷ 40,576 40,45
÷ 17,94 17,89
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