Hour maintenance – Shindaiwa 62640-94313 User Manual

Page 13

Servicing the fuel filter

CAUTION!
Make sure you do not pierce the fuel

line with the end of the hooked wire.

The line is delicate and can be dam-

aged easily.

50-Hour Maintenance

Every 50 hours of operation

(more frequently in dusty or

dirty conditions):

Remove and clean the cylinder cover

and clean dirt and debris from the cylin-

der cooling fins.

Lubricate the gearcase. To perform

this operation, first remove the gearcase

from the outer tube as follows:

Figure 30

Outer Tube

Gearcase

CAUTION!

Do not remove the D-shaped shim

washer from the gearcase clamp! The

shim washer prevents damage from

overtightening the tube clamp screw.

Gearcase

Clamp Bolt

Index Bolt

Figure 31

Gearcase

Grease Fitting

a. Loosen the gearcase clamp bolt.
b. Remove the index bolt from the

gearcase.

139/150-Hour Maintenance

NOTE:

The NGK CMR5H also meets the require-

ments for electro magnetic compliance (EMC).

Valve Adjustment

1. Remove cylinder cover, rocker arm cover,

and set piston at TDC-compression.

2. Loosen adjuster locknut so that the 2.5

mm Allen socket head adjustment screw

can turn freely.

3. Insert feeler gauge .004” (0.10 mm) for

both inkake and exhaust; between valve

stem tip and rocker arm.

4. Turn adjustment screw (clockwise =

tighter, counter-clockwise = looser) until

CAUTION!
n

Performing a valve adjustment

incorrectly may cause hard starting

and/or can damage the unit. Refer

to the C-4 Service Manual for com-

plete valve adjustment procedure

and torque specifications.

If you are unfamiliar with this engine

or uncomfortable with this proce-

dure, Consult with an authorized

Shindaiwa servicing dealer.

feeler gauge is almost snug. Back off

just enough to allow gauge to slip out

with limited resistance.

5. While holding adjustment screw in

place with Allen driver, tighten locknut

with wrench.

6. Turn engine over several times, and

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.

7. Replace rocker arm cover gasket to as-

sure proper sealing and install cover.

c. Slide the gearcase out of the tube. Using

a grease gun, pump lithium-base grease

(about 10 grams) into the grease fitting

on the gearcase until you see old grease

being purged from the gearcase (Figure

31). Purged grease will be visible in the

outer tube cavity. Clean up excess

grease, then reassemble the gearcase

onto the outer tube. Make sure the

index bolt fits into the hole on the outer

tube. Securely tighten both bolts.

Use a wire hook to extract the fuel

filter from inside the fuel tank (Figure

32). Inspect the fuel filter element. If it

shows signs of contamination from de-

bris, replace it with a genuine Shindaiwa

replacement fuel filter element. Before

reinstalling the filter, inspect the fuel

line. If you discover damage or deterio-

ration, the unit should be removed from

service until it can be inspected by a

Shindaiwa-trained service technician.

IMPORTANT!

If new gasket is not available and/or old

gasket is not damaged, old gasket may

be reused. Never use cracked or dam-

aged gaskets!

Maintenance after first 139-hours,

then every 150-hours thereafter.

Combustion chamber should be decar-

bonized, and the valve clearance should

be adjusted. It is highly recommended

that this is done by a Shindaiwa-trained

service technician.

Replace the spark plug annually: Use

only NGK CMR5H or equivalent resis-

tor type spark plug of the correct heat

range. Set spark plug electrode gap to

0.024-0.028 inch (0.6 -0.7 mm).

Filter Element

Hooked

Wire

Figure 32