Perkins 4.108 Workshop Manual page 100

ENGINES FOR REFRIGERATION UNITS-R.2
R2
General
The following major differences between the standard
4.108 vehicle engine and the 4.108 refrigeration unit
engine may be of interest:-
Crankshaft
Cylinder head
Piston ring, top
Piston ring,
2nd and 3rd
Piston ring, 4th
Piston ring, 5th
Piston
Inlet valve seal
Exhaust valve seal
Valve spring inner
Fuel pump
Lubricating oil system
4.108(V)
Tufftrided
No glow plug bosses
Plain cast iron
Internally
stepped
Cords
Maxigroove
Narrow 4th
groove for cords
rings
Fitted
None fitted
Fitted
Hydraulically
governed D.P.A.
4.108 for
Refrigeration
Units
Non-tufftrided
Glow plugs in
combustion
chambers
Chrome plated o.
Chrome Inserted
internally
stepped
Microland
Microland or spring loaded
Wide 4th groove
for Microland
ring
Fitted
Fitted
None fitted
Mechanically
governed D.P.A.
Much increased
oil and filter
capacity as
detailed on
previous page