Replacement Part List
INSTALLATION INSTRUCTIONS
1
Models 19A30046* and 19A30047* mulch kits are designed for use with select 42” and
46” two-blade cutting decks with “S” shaped spindles. Refer to your tractor’s Operator’s
Manual to assure compatibility.
Carton Contents
Before beginning installation, remove all parts from the carton to make sure everything is
present. Carton contents are listed below and shown in Figure 1.
NOTE: Kits are deck-specific. Two (2) blades will be included
with your kit. Verify you have the correct kit for your
deck size.
Blade Installation
WARNING
Before beginning installation, place the tractor on a firm and level surface, set the
parking brake, place the PTO in the disengaged (OFF) position, stop the tractor’s
motor and remove the ignition key to prevent unintended starting.
WARNING
Cutting blades are sharp. Always protect hands by wearing heavy leather work gloves
to grasp blades.
1. Remove the deck from
beneath the tractor (refer
to Deck Removal in the
Operator’s Manual) then
gently flip the deck over to
expose its underside.
2. Use a 15/16” wrench to
hold the hex nut on top of
the spindle assembly when
loosening the hex nut (a)
and washer (d)* securing
the blade. A block of wood
(c) may be placed between the deck housing and the cutting edge of the existing
blade (b) to help in breaking loose the hex nut (a) and washer (d)*. See Figure 2.
3. When reinstalling blades, be sure of the following (see Figure 2):
a. Blades (b) are installed so wings are pointing upward toward the top of
the deck.
NOTE: When replacing or installing the blades, be sure to install with the side marked
“Bottom” or “Grass Side” (or with a part number stamped on it) facing the ground
when mower is in operating position.
Figure 1
Part No. Part Qty
936-0159 Flat Washer - 42” Deck 1
747-06686 Mulch Plug Wire - 42” Deck 1
742P05177A-X Mulching Blade - 42” Deck 2
742P05510-X Mulching Blade - 46” Deck 2
631-05195A Deck Mulch Plug Assembly 1
720-04122 Wing Knob 1
(a)
(d)
(c)
(b)
*
* If equipped* If equipped
Figure 2
XTREME™ Mulch Kits - 42”/46” Decks
19A30046*/19A30047*
Form No. 769-25560A
(May 3, 2021)
MTD PRODUCTS LLC, P.O. BOX 361131, CLEVELAND, OHIO 441360019
b. Washer (d)* is placed between bottom of blade (b) and hex nut (a).
IMPORTANT! Align “S” shaped cutout on XTREME™ mulch blade with matching “S”
shape on spindle for secure fit.
4. Repeat Steps 2 and 3 on the other cutting blade.
5. Tighten hex nut (a) to 70-90 ft-lbs (95-122 N-m).
6. Reinstall the deck (refer to Deck Installation in the Operator’s Manual).
Installing the Mulch Plug
1. Pivot the chute deflector upward and
remove the protective cover from the
pin found on the deck’s surface. See
Figure 3.
2. To install the mulch plug, pivot the
discharge chute upward. Refer to
Figure 4:
a. Insert the mulch plug rod into
the hole found on the bracket
(or deck wheel bracket, on
models so equipped).
b. Position the rear of the mulch
plug over the pin found on the
deck’s surface.
IMPORTANT! Be certain the bottom
edge of the mulch plug is installed on the
inside of the lip of the deck opening, as
shown in Figure 5.
3. Secure the mulch plug as follows:
a. 42” Deck: Slide the mulch
plug wire over the pin on the
deck’s surface, position the
flat washer over the wire, and
secure the mulch plug with
the wing knob. See Figure 6.
NOTE: Make sure the wing knob is snug,
and the wire is positioned inside the lip
of the deck to keep the mulch plug securely in place. See inset in Figure 6.
b. 46” Deck: Secure mulch plug with the wing knob. See Figure 6.
Figure 3
a
b
Figure 4
Figure 5
42” Deck 46” Deck
Figure 6