HUSQVARNA MK380 User Manual

38 INCH CUT MOWER MULCHER KIT

for 1991 AND NEWER MODELS

Kit No. MK380

INSTALLATION INSTRUCTIONS

Kit Contains: (1) Mulcher Plate (2) Mulcher Blades

(1) Mounting Bolt (1) Washers (1) Locknut (1) Wing Nut

REPLACE MOWER BLADES (See Fig. 1)

• Raise mower to highest position to allow access to blades.

• Remove hex bolts, lock washers and ﬂ at washers se cur ing blades.

• Install mulcher blades with trailing edge up towards deck as shown.

• Reassemble hex bolts, lock washers and ﬂ at washers in exact order as shown.

• Tighten bolts securely (30-35 Ft. Lbs. torque).

IMPORTANT: BLADE BOLT IS GRADE 8 HEAT TREATED.

TRAILING EDGE UP

FLAT WASHER

LOCK WASHER

MANDREL (JACKSHAFT) ASSEMBLY

BLADE

INSTALL MULCHER PLATE (See Figs. 3 & 4)

CAUTION: Do not remove discharge guard

from mower. Raise and hold guard when at tach ing mulcher plate and allow it to rest on plate while in op er a tion.

• Raise and hold deﬂ ector shield in the upright position.

• Position alignment cup over rear bafﬂ e.

• Pivot mulcher plate forward and hook on mounting bolt. Be sure hang tab hooks top of deck opening.

• Assemble ﬂ at washer, lock washer and wing nut to mount ing bolt and tighten securely.

DEFLECTOR SHIELD

MOUNT ING BOLT

MULCHER PLATE

HEX BOLT (GRADE 8)*

*A GRADE 8 HEAT TREATED BOLT CAN BE IDENTIFIED BY SIX LINES ON THE BOLT HEAD.

FIG. 1

REAR BAFFLE

ALIGNMENT CUP

FIG. 3

FAS TI NG TAB SLOT

INSTALL MOUNTING BOLT (See Fig. 2)

• Raise your tractor mower deck to its highest position.

• Install the mounting bolt and locknut through mower deck bafﬂ e as shown and tighten securely.

HEX BOLT

LOCKNUT

FIG. 2

954 04 04-31 Printed in the U.S.A.

DEFLECTOR SHIELD

HANG TAB

MULCHER PLATE

FIG. 4

135418 Rev. 2 01.17.00

FLAT WASHER

LOCK WASHER

WING NUT

TO CONVERT TO BAGGING OR DIS CHARG ING

Simply remove mulcher plate and store in a safe place. Your mower is now ready for dis charg ing or in stal la tion of optional grass catcher accessory.

NOTE: It is not necessary to change blades. The mulcher blades are designed for discharging and bagging also.

MULCHING MOWING TIPS

IMPORTANT: FOR BEST PERFORMANCE, KEEP MOWER

HOUSING FREE OF BUILT-UP GRASS AND TRASH. CLEAN AFTER EACH USE.

• The spe cial mulch ing blade will recut the grass clip pings

many times and reduce them in size so that as they fall onto the lawn they will disperse into the grass and not be noticed. Also, the mulched grass will biodegrade quick ly to provide nutrients for the lawn. Always mulch with your highest engine (blade) speed as this will pro vide the best recutting action of the blades.

• Avoid cutting your lawn when it is wet. Wet grass tends

to form clumps and interferes with the mulch ing action. The best time to mow your lawn is the early afternoon. At this time the grass has dried and the newly cut area will not be exposed to the direct sun.

• For best results, adjust the mower cutting height

so that the mower cuts off only the top one-third of the grass blades (See Fig. 5). For ex tremely heavy mulch ing, re duce your width of cut and mow slow ly.

MAX 1/3

FIG. 5

• Certain types of grass and grass con di tions may re quire that an area be mulched a second time to com pletely hide the clippings. When doing a sec ond cut, mow across or perpendicular to the ﬁ rst cut path.

• Change your cutting pattern from week to week. Mow north to south one week then change to east to west the next week. This will help prevent matting and graining of the lawn.

REPAIR PARTS

MODEL NO. MK380, PRODUCT NO. 954 04 04-31

FOR FUTURE REFERENCE AND REPAIR PARTS OR DER ING, KEEP THIS INSTRUCTION SHEET WITH YOUR TRACTORS OWNER'S MANUAL

1 KEY PART DESCRIPTION NO. NO.

1 532134148 Blade, Mulching 2 532132803 Cover, Mulcher 3 874930620 Bolt, Hex 3/8-16 x 1-1/4 4 873930600 Locknut 3/8-16 5 819132016 Washer 13/32 x 1-1/4 x 16 Ga. 6 810040600 Washer, Lock 3/8 7 532135651 Wing Nut — 532135418 Sheet, Instruction

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