SAFARI

ENGINE 80 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.