Yanmar YM135d - Page 54

b) Injection pressure is adjusted by vary:
ing the thickness of the adjusting shims. Every
0.0039 in. (0.1
mm) of shims provides approx-
imately
142- psi (10 kg/cm2) variation in/ the
pressure.
Be sure to use shims which have holes in their
centers.
[Adjusting Shim]
11 025053420
mm
0.5 11025053430
Injection condition
C) The injection pressure 2,276 psi (160 kg/ (2.2) Fuel Injection Pump
cm2) is of course important, but be sure to
check the fuel is injected correctly as shown
a)
Measure the injection volume of each cyl-
below: inder.
b)
Measure the pressure to be generated.
(more than 7,112.5
psi1500 kg/cm2 )
c)
Whenever any of the plungers have to be
replaced because of wear, the disassembly and
assembly work is carried out in the following
sequence.
Plunger diameter and cam
lift:
0.2756 in x 0.2756 in (7oi x 7 mm)
- -
DISASSEMBLY SEQUENCE
[NO. 1 CYLINDER]
.Delivery valve spring
Delivery valve holder
J. Plunger guide roller pin
2. Plunger guide roller Delivery valve sea
3. Plunger guide Plunger barrel packing
4. Plunger position adjusting shim
Fuel control pinion (A)
5. Plunger and plunger spring retainer
Plunger spring retainer Iuqperl
6. Plunger spring
7. Plunger spring retainer
Plungw spring retainer (lower
Plunger position adjusting shim
8. Fuel control pinion (A)
uel injection pump ars'y
9. Delivery valve holder