Craftsman 143.991200 Specifications download pdf (Page 70)

15. Remove the cylinder cover or mounting flange

using a seal protector positioned on the seal to

prevent seal damage. The crankshaft must be

free of rust or scale to slide the cover or flange

off the crankshaft. OHH engines with a ball

bearing on the P.T.O. end of the crankshaft

require the oil seal and the snap ring to be

removed prior to the cylinder cover removal. For

engines equipped with 8-1/2:1 gear reduction,

turn the crankshaft to roll the reduction shaft gear

off the crankshaft worm gear when removing the

cylinder flange (diag. 16, 17, 18, 19).

16. On engines equipped with 8-1/2 :1 gear

reduction, remove the auxiliary shaft from the

cover by removing the retaining ring and sliding

the shaft out of the washers and drive gear.

17. Align the timing marks on the camshaft and

crankshaft gears and remove the internal

components (diag. 20).

18. Remove the lifters, rod cap, and counterbalance

shaft or gears if applicable.

19. Before removing the piston, remove any carbon

from the top of the cylinder bore to prevent ring

breakage. Push the piston out the top of the

cylinder bore.

20. Remove the valves from the head on models

OHH and OVRM by supporting the valves with

fingers while compressing the valve springs, one

at a time, with thumbs. Slide the large opening

in the retainer toward the valve stem to remove

(diag. 21). On all other overhead valve engine

models, place a 3/4" (19.05 mm) deep socket

over the valve cap and strike the top with a steel

hammer. This action loosens the cap. Remove

the cap, retainers, and valve springs. The valve

springs must be assembled on the same valve

they are removed from (diag. 15).

OIL SLEEVE TOOL

MOUNTING FLANGE

OIL SEAL

GEAR

WORM GEAR

OIL SEAL REMOVED

SNAP RING

BEVELED TOOTH

TIMING MARK

CAMSHAFT

GEAR

CRANKSHAFT

GEAR

Main Menu

1 2 ... 65 66 67 68 69 70 71 72 73 74 75 ... 93 94

Comments to this Manuals

No comments

Craftsman 143.991200 Specifications Page 70

Comments to this Manuals