SAFARI

ENGINE

Fig. 1

Fig. 2

Fig. 3

ROCKER ARM ASSEMBLY AND PUSH

RODS

ROCKER ARM ASSEMBLY AND PUSH RODS

REMOVAL AND INSPECTION

(Cylinder head cover removed)

1 Unscrew rocker arm bracket mounting bolts and

remove. Fig. 1.

2 Remove rocker arms with shaft and brackets.

3 Remove push rods and arrange them serially by

suitable marking. Push rods should be removed

carefully since tappets might get pulled along with

it.

4 Remove grub screws holding rocker shaft in rocker

arm brackets and take out rocker arm shaft

brackets, rocker springs and spring clips. Fig.2.

5 Compare free length of rocker springs and

replace defective ones. Check rocker shafts for

wear on rocker arm bearing surfaces and replace

shafts, if necessary.

6 Check expansion plugs at extreme ends of rocker

shaft for proper sealing and replace, if necessary.

7 Check rocker arms for wear on threads, replace

rocker arm if threads are damaged.

8 Check fit of rocker arm bush in its parent bore. If

bush has turned in rocker enlarging parent bore,

replace rocker arm.

9 Measure inside diameter of bush. Replace bush, if

worn out, taking care that oil hole in bush and

rocker arm are aligned. Ream new bush to size.

10 Check rocker arm tips for wear and pitting. Slight

- wear on rocker arm tips may be corrected by

dressing it to a radius of 15 mm. Replace rocker

arm if there is heavy pitting/wear.

11 Check ball pins of adjusting screw for thread wear/

damage. Replace, if necessary.

12 Check rocker end of push rod for excessive wear,

pitting/scoring. Replace push rods, if necessary.

13 Check push rods for straightness Fig.3 Bent push

rods with ball and sockets in good condition can

ba straightened in cold condition. The movable

supports At and B’ in relation to fixed guide

supports in the fixture represent the centre line

for push rod, if bends have been ascertained,

displace supports under the bend portion and

straighten the bend by slight hammer blows.