SAFARI

ENGINE

112

Fig. 5

Fig. 6

INSPECTION AND REPAIR OF VACUUM PUMP

1 Check cylinder sleeve bore for wear.

2 If wear on cylinder sleeve bore is so slight that

boring and/or honing is not required, old piston

can be reused.

3 Check old piston for cracks, scores, damage, etc.

4 Check fit of piston pin and condition of piston

rings, ring grooves and lands.

5 Clean piston ring grooves. Install piston rings and

check lateral clearances.

6 Check piston ring butt clearances.

7 If necessary, replace piston rings.

8 If wear on cylinder sleeve bore is excessive, re-

machine it to next repair stage. If it is not possible

to re-machine old cylinder sleeve, replace it by

new one.

9 Select suitable piston for re-machined cylinder

sleeve bore and install new piston rings.

10 Check camshaft eccentric for size and wear. If

necessary, re-grind it to next repair size.

11 Select suitable bearing shells in accordance with

camshaft eccentric size and install into connecting

rod and connecting rod cap.

12 Screw connecting rod cap to connecting rod and

tighten to specified torque.

13 Measure big end bearing bore of connecting rod

at 3 points (about 30 deg from parting surface)

with internal measuring instrument. Specified

values should be maintained.

14 Unscrew connecting rod cap again.

15 Measure bore of connecting rod small end

bushing for size and wear using internal

measuring instrument.

16 If necessary, replace bushing by new one and ream

it to correct size.

DRILL OIL HOLE THROUGH BUSHING

17 Check bend and twist of connecting rod on

suitable gauge by using new gudgeon pin. If

necessary straighten connecting rod in cold

condition.

18 Check condition of valves and replace worn out

parts. If necessary, replace complete sub-assembly

of cylinder head.