TABLE 5. ENGINE WEAR LIMITS AND SERVICE SPECIFICATIONS

TABLE 5.

ENGINE WEAR LIMITS AND SERVICE SPECIFICATIONS (Continued)

10. CAMSHAFT

Between rear idler and balancer

g e a r . . . . . . . . . . . . . . . . 0.0054-0.0095 in.

(replace at 0.0145 in.)

Ream Cam Bushing

i n p l a c e ........ . ...... . ... . ...1.7515-1.752 in.

Between balancing gears 0.0054-0.0135 in.

(replace at 0.0185 in.)

Camshaf journal.0.D........................ 1.749-1.750 in.

Running..clearance........ ......... ............0.0015-0.003 in.

Between front idler gear and

in.)

(max wear 0.005

c r a n k s h a f t g e a r . . . . . . . 0.002-0.012 in.

End thrust taken up between camshaft

(replace at 0.017 in.)

gear and thrust button.

IGNITION.

15.

11.

ROCKERARMS

Spark plug gap . . . . . . . . . . . . . . . . 0 . 0 2 5 i n .

Contact point gap . . . . . . . . . . . . . 0.020 in.

Running clearance

on rocker shaft ........................ . . 0.0005-0.0025 in.

Time distributor at 5 deg. BTC at 400-500

RPM. (align timing pin and notch on crank-

12.

GOVERNOR

shaft pulley.)

Ream governor gear bushing

i n p l a c e . . . . . . . . . 0.439-0-440

in.

LUBRICATION.

16.

Running clearance in

N o r m a l o i l p r e s s u r e . . . . . . . . ...28-30 psi.

bushing . . . . . . . .

0.0025-0.004

in.

Ream governor shaft bushing

i n p l a c e . . . . . . . . . 0.376-0-377

in.

GOVERNED SPEED

17.

Running clearance

i n b u s h i n g . . . . . 0.0015-0.0032

in.

Maximum loaded speed . . . . . . . . . . 2200 RPM

CYLINDER HEAD

13.

18. BALANCING SYSTEM

Retorgue head after first warm-up

Idler gear bushing I.D. ..0.875-0.876 in.

and after 50 hours of operation.

Idler spindle O.D. . . . . 0.8745-0.8733 in.

Running clearance . . . . . 0.0005-0.0027 in.

Exhaust valve

insert O.D. . . . . 1 . 5 0 1 5 - 1 . 5 0 2 5 i n .

Balancing shaft bushing I.D.

Bore in cylinder head..1.499-1.500 in.

Front . . . . . . . . . . . . . . . . . 1.002-1.005 in.

1.290-1.2925 in.

Counterbore depth . . . . 0.260-0.263 in.

Rear . . . . . . . . . . . . . . . .

Valve face runout...... 0.002 in max.

Balancing Shaft O.D.

0.9975-0-998 in.

V a l v e seat angle . . . . . . . . . . 45 degrees

Front . . . . . . . . . . . . . . .

Valve seat width . . . . . . . . . 8 0 - , 0 9 0 i n .

1.2845-1.285 in.

...............

Rear

Running clearance

0.004-0.0075 in.

VALVE SPRING PRESSURE

Front................

Free length (intake) . . . . . 2.78 in.

0.005-0.008 in.

Rear . . . . . . . . . . . . . . . .

0.002-0.010 in.

Free length (exhaust).....2.314 in.

Idler gear end play . . .

Valve guide projection . . .9375 in.

0.005-0.008 in.

Shaft end play . . . . . . . .

(obtained by use of shims)

TIMING GEARS BACKLASH.

14.

CLUTCH FACE RUNOUT........ .008 in.

19.

Dial indicator readings to be taken in

plane of rotation.

20.

CYLINDER SLEEVE

.001 to .004 in.

Between all gears except balancing

PROJECTION . . . . .

idler gear and balancing gears

0.0055-0.011 in.

(Replace at 0.016 in.)

5-15