Yard Machines 690 Thru 699 - Manual (Page 15)

15
• Depress the clutch-brake pedal until the scissor
brackets come together.
• Shut off the engine.
• Tighten hex nut on the scissor mounting bracket.
• Thread the speed selector rod in or out of the
ferrule until the hydrostatic control lever lines up in
neutral position on the speed control index bracket.
• Tighten hex jam nut against the ferrule.
• Replace the transmission panel, parking brake
knob and rubber boot on relief valve.
• Remove the blocks from under the frame and test
the operation of the tractor.
Deck Leveling
If the tractor is cutting grass unevenly, level the deck
following instructions on page 10.
Cutting Deck Engagement
The cutting deck engagement may be adjusted to
ensure that deck is disengaged when lift lever is in
BLADES STOP position. Correct adjustment as
follows.
• With the engine off, place the lift lever in the highest
cutting position (first position).
• Remove the cotter pin and flat washer which
secure the disengagement rod to the stabilizer
shaft assembly. See Figure 14 .
Figure 14
• Shorten the rod by threading it in, until the ferrule is
against the back of the slot in the lift shaft
assembly, and the rod lines up with the hole in the
stabilizer shaft.
• For more belt tension, the disengagement rod must
be lengthened. To decrease belt tension the
disengagement rod must be shortened.
• Check the adjustment by placing the lift lever in the
BLADES STOP position. The deck should move up
and forward, allowing the belt to become loose.
Start and test for disengagement. Repeat
procedure as necessary.
Brake Adjustment
WARNING: Do not have the engine running
when you adjust the brake.
The brake is located by the right rear wheel inside the
frame. The brake has been set at the factory to the
proper clearance. During normal operation of this
machine, the brakes are subject to wear and will require
periodic examination and adjustment.
Figure 15
• To adjust the brake, adjust the nut so the brake
starts to engage when the brake lever is 1/4" to
5/16" away from the axle housing. See Figure 15 .
Wheel Adjustment
(Units with Adjustable Tie Rod)
The caster (forward slant of the king pin) and the
camber (tilt of the wheels out at the top) require no
adjustment. Automotive steering principles have been
used to determine the caster and camber on the tractor.
The front wheels should toe-in between 1/16- 5/16 inch.
To adjust the toe-in, follow these steps.
• Remove the hex nut and the lock washer, and drop
the end of the tie rod from the axle bracket. See
Figure 16 .
• Loosen the hex jam nut on tie rod.
38" Decks
42" and
46"Decks
Stabilizer Shaft
Assembly
Disengagement Rod
Flat Washer
Hairpin Clip
Stabilizer Shaft
Assembly
Disengagement Rod
Flat Washer
Hairpin Clip
Nut
Brake
Lever
Disc
Brake