Husqvarna BC 435B Maintenance Instructions, Replacing Cutter Line, Storing A Unit, Air Filter

MAINTENANCE INSTRUCTIONS

•REPLACING CUTTER LINE

GB

A

C

GB

•STORING A UNIT

WARNING: Failure to follow these steps may cause varnish to form in the carburetor

1.	Turn the nut (A) CLOCKWISE and remove it (Fig.
	15A).
2.	Remove the spool (C), and spring (D) from spindle
	(E).
3.	Remove any remaining cutter line.
4.	Double a 32' (9.8m) length of .095 or .105" (.24 or
	.27cm) cutter line. Place the looped center in one of
	the slots (G) of the spool divider (Fig. 15B).
5.	Wind as shown in illustration (Fig. 15C), keeping ten-
	sion, with each half separated by the spool divider.
	Wind to within 6" (15cm) of the ends.
6.	Lock each end of line into a slot (H) on opposite sides
	of the spool (Fig. 15D).
7.	Install the spring (D) over the spindle (E). Insert each

H

Fig. 15D

B

B

Fig. 15F Fig. 15G

•AIR FILTER

J

E D

FJ

Fig. 15E

5” (13mm)

Fig. 15H

Fig. 17A

D

Fig. 17C

B

Fig. 17B

and difficult starting or permanent damage following storage.

1.	Perform all the general maintenance recommended
	in the Maintenance Section of your User Manual.
2.	Clean exterior of engine, Output Shaft, cutting attach-
	ment guard and cutting head.
3.	Drain fuel from the fuel tank.
4.	After fuel is drained, start engine.
5.	Run engine at idle until unit stops. This will purge the
	carburetor of fuel.
6.	Allow engine to cool (approx. 5 minutes).
7.	Using a spark plug wrench, remove the spark plug.
8.	Pour 1 teaspoon of clean 4-cycle oil into the
	combustion chamber. Pull starter rope slowly several

end of the line through an eyelet (J) in the housing (F)

(Fig. 15E).

8. Lower the spool into the housing (E) while feeding the

line through the eyelets (J). Ensure the spring seats

itself into the spool (Fig. 15E).

9. Once the spool is in place, apply pressure on the

spool compressing the spring. Pull each end of the

line (B) sharply to unlock the line from the slots (Fig.

15F).

10. Continue to apply pressure to the spool until the knob

can be threaded COUNTERCLOCKWISE onto the

spingle. Tighten the knob securely by hand only (Fig.

15H)

11. Trim the excess line to approximately 5” (13cm). This

wil minimize load on engine durig starting and warm-

up. (Fig. 15H)

CAUTION: NEVER operate trimmer without the air filter. The air filter must be kept clean. If it becomes damaged, install a new filter.

To Clean Air Filter:

1.Remove button (A) holding air filter cover in place,remove cover (B) and lift filter (C) from air box (Fig.16).

2.Wash filter in soap and water. DO NOT USE GASO-

LINE!

3.Air dry filter.

4.Reinstall filter.

NOTE: clean the air filter element every 3 months or 25 hours.

NOTE: Replace filter if frayed, torn, damaged or unable to be cleaned.

times to coat internal components. Replace spark

plug.

•CARBURETOR ADJUSTMENT

The carburetor was pre-set at the factory for optimum per- formance. If further adjustments are necessary, please take your unit to the nearest Authorized Service Center.

•SPARK PLUG

1.Spark plug gap = .025" (.635mm) (Fig. 18).

2.Torque to 105 to 130 inch pounds (12 to 15 N•m). Connect spark plug boot.

F

E

9. Store unit in a cool, dry place away from any source

of ignition such as an oil burner, water heater, etc.

•REMOVING A UNIT FROM STORAGE

1.Remove spark plug.

2.Pull starter rope briskly to clear excess oil from com- bustion chamber.

3.Clean and gap spark plug or install a new spark plug with proper gap.

4.Prepare unit for operation.

5.Fill fuel tank with proper fuel.

A. KNOB				G
B. CUTTER LINE					J
C. SPOOL		B
D. SPRING
E. SPINDLE	C
F. HOUSING
G. DIVIDER SLOTS
H. SLOTS
J. EYELETS
A						F
	B			D	E
			Fig. 15A

Fig. 15B Fig. 15C

A

B C

Fig. 16

•FUEL CAP / FUEL FILTER

COUTION: Remove fuel from unit and store in approved container before starting this procedure. Open fuel cap slowly to release any pressure which may have formed in fuel tank.

1.Completely remove fuel cap (A) from fuel tank (B) to be able to remove fuel filter (D) from tank. Use a piece of wire (C) with a hook formed at the end to pull filter out of tank. (Fig. 17A & Fig. 17B)

2.Pull filter (D) off with a twisting motion.

3.Replace fuel filter (D). (Fig. 17C)

NOTE: Never operate the trimmer without the fuel filter. Internal engine damage could result!

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Fig. 18 Fig. 19

•CUTTING ATTACHMENT GUARD KNIFE SHARPENING

1.Remove cutter knife (A) from cutting attachment guard

(B)(Fig. 19).

2.Place knife in a bench vise. Sharpen knife using a flat file, being careful to maintain the angle of cutting edge. File in one direction only.

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