Gravely Convertible 10 Shop Manual page 41

8. Installation of Oil Seals on Crankshaft
a.
Guide oil seals into position on crankshaft without damaging lips of seals. Any foreign matter on
knife like edge or any bending of seal may cause damage and an oil leak can result.
b. After oil seals are started on shaft, place block on its side. The oil seals may now be driven
squarely into bearing plate and cylinder block. (See Figure 43)
10. Oil Base
a.
Use pilot studs to align cylinder block, gasket and oil base.
b. A new gasket must be used to prevent oil leakage.
c.
Assemble oil base to block with four screws.
d. Torque pan bolts.
Figure 43 - Installing Oil Seals
11. Installing and Setting Valves
a.
Valves, valve seats and ports should be thoroughly cleaned. Valves should be ground and lapped-in to
obtain a good valve seat. Keep valve seat from 1/32" to 1/16" in width.
b.
Valve clearance should be checked cold. On K241 and K301 adjust tappets to correct clearance.
c.
After correct clearance is obtained, remove valves and install valve springs and retainers and rotators
if used. Replace valves, compress springs and place locking keys in grooves of valve stems.
12. Cylinder Head
a.
Always use a new gasket when head has been removed for service work.
b. Check cylinder head on face plate to be sure gasket surfaces make good contact at all points.
c.
It is important that head cap screws be tightened evenly and in steps until proper torque is reached.
d. Install new spark plug and tighten to specified torque. Spark plug gap should be .025.
13. Breather Assembly
Reed type breathers are used to maintain slight vacuum in crankcase. All parts must be clean and in
good condition. Use new gaskets, reed and filter for reconditioned engine.
14. Magneto
a.
On all magneto ignition systems the magneto coil - core assembly is secured in stationary position on
the bearing plate. On the magneto - alternator system the coil is part of the stator assembly which is also
secured to the bearing plate. Permanent magnets are affixed to the inside rim of the flywheel.
Figure 44 – Checking Valve –
Tappet Clearance
41
Figure 45 - Tightening Cylinder
Head Capscrews