Lubrication System - Honda ST50 1969 Shop Manual

14
.....
.....
Fig.ID
3.2 Lubrication System (Oil Pump)
Description
The engine oil from by the trochoid pump is di-
verted into two routes. (Fig. 8)
Route one:
Oil Is seot through the right crankcase-,.rigbt crank·
case cover--t«t1trifuga]
ltff--+eonnectiog
rod
large end rollers.
Route two:
Oil Is sent through the cylinder stud bolt-.rocktt
ann side cover-camshaft profiles and bearing-,.
vaJvemecbanlsm .
Disassembly
I. Unscrew the right crankcase cover mounting
screws the cover.
2. Remove the clutch outer cover.
3. Unscrew the 14 mm clutch lock nut and
wa-
sher. Remove the clutch assembly.
4.
Loosen
the three 6 mm oil pump mounting
bolts and remove the oil pump assembly.
S. Loosen the three cross screws attaching the
oil pump cover. The oil pump can then
be
disassembled(Flg. 9) •
Inspection
I. Tum the oil pump drive shaft by hand to
make sure it turns smoothl y.
2. Measuring the clearance between the outer
rotor and the pump body.
Insert the thickness gauge between the ou1er
rotor and the pump body
{Fig.
10).
Standard Value
0.10-0.u
{0.004-<i.006}
mm(incb)
Serviocablcilmlt
Repilceifovel"
0.20 (0.0079)