Governor Lever And Spring; Oil Pump Checking; Kd 477-2 Workshop Manual_Cod. Ed0053029370_1° Ed_ Rev - Kohler KD 477-2 Workshop Manual

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31
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KD 477-2 Workshop Manual_cod. ED0053029370_1° ed_ rev. 00

Governor lever and spring

Check that the shoes (S, fig. 30) are level and that the springs have
not lost their elasticity. Renew any excessively worn parts after con-
sulting the spare parts catalogue.
Supplement and governor spring dimensions (fig. 30):
Spring Lenght
mm
Supplement (H)
16,9 ÷ 17,4
Governor (N)
53

Oil pump checking

The pump is of the lobed rotor type driven by the camshaft.
Dismantle pump and check rotors.
Check lobes and centers and if they are worn, replace rotors.
Check the amount of pump wear, measure rotor A and rotor B (see
fig. 31), and compare to the following table:
Measurement Dimensions mm
C
29,745 ÷ 29,770
D 40,551 ÷ 40,576
E
30,030 ÷ 30,60
F 17,920 ÷ 17,940
If wear exceed these figures, replace complete pump.
The coupling clearance between oil pump external rotor and base-
ment housing is:
Fitting mm
0,094 ÷ 0,144
The axial clearance of the rotors (fig. 32) should be between:
Fitting mm
0,010 ÷ 0,050
CHECKS AND OVERHAUL
Lenght under Load
load mm kg
35 0,3
69,2 2,5
Max. wear mm
29,700
40,45
30,10
17,89
Max. wear mm
0,294
Max. wear mm
0,100
X
Nr of
windings
18,5
13
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