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Maintenance
2. To tighten transmission belt, loosen the 3/8 inch
nyloc nut on transmission belt idler pulley. Slide
bolt inward in slot and retighten nyloc nut.
3. When properly adjusted, the belt should have 1/2
inch (1.3 cm) of deection with three pounds
of pressure on the belt midway between the
transmission and engine pulley.
Wheel Drive Belt Pulley
Scrapers
1. Stop engine and wait for all moving parts to stop.
Engage parking brake. Remove key or spark plug
wire(s).
2. Be sure mud and grass scraper, on each side,
is adjusted properly and centered in the pulley
grooves. The pointed part of the scraper should
be centered and as deep in the pulley groove as
possible without rubbing at any point.
Engine to Mower Deck Belt
1. Stop engine and wait for all moving parts to stop.
Engage parking brake. Remove key or spark plug
wire(s).
2. Check the adjustment of the lower blade drive
linkage located between the bellcrank on the
engine deck and assist arm on the mower deck.
Lengthen or shorten the linkage. When properly
adjusted, there should be 1/16 inch to 1/8 inch
(2–3 mm) of clearance between bell-crank and
transmission output shaft when belt is engaged.
Make sure the assist arm is against the rear assist
arm stop on the deck (see Figure 13). Push the
lever down to the disengaged position. The assist
arm should contact the front assist arm stop on
the deck. If it does not contact, readjust so that
the bellcrank is closer to the transmission output
shaft.
3. Belt must be tight enough to not slip during heavy
loads while cutting grass. Over-tensioning will
reduce belt and spindle bearing life. To adjust
belt tension, loosen the 5/16 inch whizlock nut
on turnbuckle and rotate the turnbuckle; rotate
turnbuckle toward rear of mower to tighten, and
toward front of mower to loosen belt tension (see
Figure 13). Leave a minimum of 5/16 inch (.79
cm) of the eyebolt threads engaged on both ends
of the turnbuckle.
For 48” Decks: If there is no adjustment left in
the turnbuckle and the belt is still loose, the rear
idler pulley can be repositioned in the front hole
(See Figure 12). The belt guide located next to
the pulley must also be repositioned in the front
hole when the pulley is moved. The turnbuckle
will need to be readjusted.
Check belt tension after the rst hour of operation
and at least twice during the rst 24 hours of
operation. Adjust as necessary.
Figure 13
48 inch Deck Shown for Reference Only
1. Pulley location for Metro
2. Pulley can be moved to the front position to tighten the
belt when there is no adjustment left in the turnbuckle
(48 inch deck only)
3. Belt guide must be moved to the front position if the
pulley is moved. (48 inch deck only)
4. Turnbuckle
5. 5/16 inch (.79 cm) minimum engagement
6. 5/16 inch whizlock nut
7. Rear Assist Arm Stop
8. Assist Arm
9. Front Assist Arm Stop
10. Point “A”
4. Proper belt tension will require about 10 lb (4.5
kg) side pull on belt, halfway between pulleys (see
Figure 13, item 10–Point A) to deect belt 1/2
inch (12 mm).
5. Check belt guide under the engine deck to see that
it is properly set (see Belt Guide Adjustment
section). Also check the blade brake adjustment
(see Blade Brake Adjustment section).
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