31
COMPILER TECO/ATI
ENDORSED
DATE
23.06.2003
REG. CODE
1-5302-607
MODEL N°
50889
DATE OF ISSUE
06-03
REVISION
00
XIII
55
56
57
58
59
kgm 2,2 (Nm 21,6)
ENGINE ASSEMBLY
Notice: These instructions are valid for engines up-dated
prior to the publication of this manual. Any modifications
must be checked on the technical circulars.
Before assembling the engine carefully clean all parts
and dry them with compressed air. Lubricate moving parts
to prevent seizing when starting up. Replace the gaskets
with new ones each time the engine is assembled.
Use torque wrenches to ensure that the correct tightening
torques are applied.
Preparing the crankcase
Clean the mating surfaces of sealing compound residues or other
foreign material using a copper scraper or fine emery stone. Make
sure that the oil passages are open and free of built-up deposits.
1. Fit the plugs (A, fig.55) in their holes.
2. Insert the internal accelerator lever (B, fig.55) into the crankcase
with its spring taking care to protect the oil seal O-ring from
damage.
Complete the external assembly with plate, spring, lever, etc. as
shown in figure 55.
3. Mount the bearing bush (gear train side) using either a
standard press or a made-to-measure punch as shown in
figure 56. Fit the bush by matching the hole with the passage on
the crankcase. Bushes with standard or smaller internal
diameters can be ordered as required.
4. Insert the complete oil pressure relief valve (A, fig. 57) into its
housing (C, fig.57). Make sure that the valve ball seat is free of
dirt that could reduce the effectiveness of the pressure seal.
Secure the oil pressure valve with the relative screw (B, fig. 57).
5. Insert the cylinder studs and the centring pins.
Central main bearings
Fit the shells into their seats and coat with a thin film of oil.
The reference numbers (fig.58) must be aligned on each half-shell,
making sure that the oil passages match the corresponding
openings in the crankcase. Torque the bearing assembly bolts (fig.
59) to:
A warped oil retainer may allow the introduction of air into
the engine thus causing crankcase ventilation problems.
Use genuine oil retainers with the LOMBARDINI.
