Ruggerini Ry100, Руководство по ремонту

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14.0
00497R0990 - 15-07-2000
D IE S E L
9.4 Rocker arms
Make sure that there are no evident signs of wear on the
contacting surfaces. Replace the parts if necessary.
9.5 Cylinder
In special cast iron with integral liner. Use a bore gauge to
check the two internal diameters (C-D)
(C-D) (C-D) (C-D) (C-D) perpendicular to each
other and at different heights (fig. 15). Maximum tolerated
taper error (A-B)
(A-B) (A-B) (A-B) (A-B) and ovality error (C-D) (C-D) (C-D) (C-D) (C-D): 0.06 mm.
Just replace the piston rings if the cylinder diameter does not
exceed the values above or if the cylinder is slightly scored on
the surface. In this case, to ensure that the piston rings and
cylinder adapt to each other as soon as possible, restore liner
roughness by passing 80 to 100 grain emery cloth soaked in
diesel fuel and wound around the palm of the hand over its
inner surface (fig. 16) until this appears cross-hatched. Follow
these operations by thorough washing in gasoline or petroleum.
Replace the cylinder and piston if there is a ridge in zone "X"
fig. 16 of the cylinder and if tapering and ovality exceed the
previously given values.
Grinding-in must always be carried out when new valves or
housings are mounted. Valve housings oversized on the
outside by 0.5 mm are available.
Thoroughly wash the valve and housing with petroleum or
gasoline to eliminate lapping paste residues or swarf.
Proceed in the following way to make sure that the valve and
seat are tight:
1) Mount the valve on the head with cap string and cotters
(see fig. 9)
2) Overturn the head and pour a few drops of diesel fuel or oil
on to the edge of the valve top
3) Blow compressed air into the head duct. Plug the edges of
the duct itself to prevent air escaping.
If there are air leaks in the form of bubbles between the
housing and valve, demount the valve and grind-in again.
9.3 Valve springs
Check the length of the spring as indicated in fig. 14 to identify
any yielding.
Replace the springs if the values are different.
RY85.0 - RY85.1 Ø 80
to
80.020
RY100 - RY101 Ø 85
to
85.020
RY120 - RY121 Ø 87
to
87.020
Cylinder diameter: Cylinder diameter:
Cylinder diameter: Cylinder diameter:
Cylinder diameter:
16
15
14
42.3 to 43.7
28.3 to 28,5
Free length
18.7 to 18.9
1 4 . 9 1 1 4 . 9 1
1 4 . 9 1 1 4 . 9 1
1 4 . 9 1
± 5 %
K g K g K g K g K g
13
DDDDD
C C C C C
A A A A A
2 2
2 2
2
°
11111
°
3 3
3 3 3
°
B B B B B
X X X X X
90 90 90 90 90
° - 1
20 20 20 20 20
°
Ra = 0.5 - 1 µ Ra = 0.5 - 1 µ Ra = 0.5 - 1 µ Ra = 0.5 - 1 µ Ra = 0.5 - 1 µ
2 4 . 7 2 2 4 . 7 2 2 4 . 7 2 2 4 . 7 2 2 4 . 7 2
± 5 %
K g K g
K g K g
K g