Transmission Drive Belt - Troy-Bilt RZT MUSTANG ZT50 Operator's Manual

Mower Blade Care
WARNING!
Before performing any maintenance,
place the PTO switch in the "OFF" position, engage
the parking brake lever, turn the ignition key to the
"OFF" position and remove the key from the switch.
Protect your hands by using heavy gloves when
handling the blades. When servicing the mower
deck, be careful not to cut yourself on the
sharpened blades.
The cutting blades must be kept sharp at all times. Sharpen the
cutting edges of the blades evenly so that the blades remain
balanced and the same angle of sharpness is maintained.
If the cutting edge of a blade has already been sharpened many
times, or if any metal separation is present, it is recommended
that new blades be installed. New blades are available at your
authorized dealer.
The blades may be removed as follows.
1. Remove the deck from beneath the tractor, (refer to Deck
Removal on page 26) 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 securing the blade.
A block of wood may be placed between the deck housing
and the cutting edge of the blade to help in breaking loose
the hex nut securing the blade. See Fig. 7-7.
Hex Flange Nut
Spindle Assembly
Figure 7-7
3. When reinstalling the blades, be sure they are installed so
that the wind wings are pointing upward toward the top of
the deck.
4. Tighten the blade nuts to 70-90 ft. lbs.
5. Reinstall the deck (refer to Deck Installation on page 28).

Transmission Drive Belt

If the transmission drive belt becomes worn and causes the drive
transmissions to slip, the drive belt must be replaced. To replace
the drive belt, proceed as follows:
1.
2.
Square Hole
Idler
Bracket
Wood Block
3.
4.
5.
6.
7.
8.
9.
Remove the deck drive belt from the PTO clutch on the
bottom of the engine following the instructions in Deck
Removal.
From beneath the rear of the tractor, insert a
ratchet into the square hole of the drive idler bracket. See
Fig. 7-8.
Transmission
Drive Pulley
Idler
Pulley
Idler Bracket
Spring
Figure 7-8
Using the ratchet for leverage, pivot the idler bracket and
idler pulley away from the backside of the 'V" belt; then lift
the belt off and above the engine pulley and off the idler
pulley.
With the belt loose, lift the belt off, up and over the two
transmission drive pulleys. Remove the belt from the
engine and idler pulleys.
Loop the new belt and slide over and onto the two
transmission pulleys.
Route the belt above the idler bracket back to the engine
drive pulley. Lift the belt over the PTO pulley and above the
engine drive pulley.
Using the ratchet for leverage, pivot the idler bracket and
idler pulley against the spring tension; then slip the belt
down into the engine drive pulley and onto the idler pulley.
Release the idler bracket so that the idler pulley tightens
against the back side of the belt and tensions the drive belt.
Reinstall the deck drive belt.
3⁄8" drive
Drive
Belt
PTO
Pulley
Engine
Pulley
s 7 — s 29
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