Shindaiwa T2510 Service Manual page 9

I. Adjustment Procedure
Adjustment
Procedure
STEP 1. Remove cylinder cover, rocker arm
STEP 2. (Optional.) To lock crankshaft/cam
STEP 3. Loosen adjuster locknut so that 2.5
STEP 4. Insert feeler gauge (.003 for intake;
STEP 5. Turn adjustment screw (clockwise =
STEP 6. While holding adjustment screw in
STEP 7. Deactivate timing screw if used.
STEP 8. Turn engine over several times, and
STEP 9. Replace rocker arm cover gasket to
gasket is not damaged, old gasket may be
reused if coated with threeBond #1207-C
sealant upon reassembly.
Never use cracked or damaged gaskets!
Edition 2 • 09/2007
Valve Clearance Adjustment
cover, and set piston at TDC-compression
(see point "H" above).
position at TDC-compression stroke,
activate timing screw (see pg. 12).
mm Allen socket head adjustment screw can
turn freely.
.004 for exhaust) between valve stem tip
and rocker arm.
tighter, counter-clockwise = looser) until
feeler gauge is almost snug. Back off just
enough to allow gauge to slip out with
limited resistance.
place with Allen driver, tighten locknut with
wrench.
return to TDC-compression. Recheck with
proper feeler gauge to make sure clearance
adjustment did not change as a result of
tightening locknut. Readjust as necessary.
assure proper sealing and install cover.
If new gasket is not available and old
IMPORTANT!
At TDC-compression, cam lobe is straight
down. Rib aligns with mark on casting.
Loosen adjuster locknut with 8 mm box-end
wrench.
Insert appropriate feeler gauge between
rocker arm and valve stem tip. Turn
adjustment screw with 2.5 mm Allen driver
until gauge is held snugly between rocker
arm and valve stem. Tighten locknut.
To ensure proper sealing, always use a new
gasket when replacing covers.
4
Section
10