MTD 60-1620-4 Lawn Mower User Manual


 
11
5
WARNING
When removing
the cutting blade
for sharpening or
replacement, protect
your hands with a
pair of heavy gloves
or use a heavy rag to
hold the blade.
An unbalanced blade
will cause excessive
vibration when rotat-
ing at high speeds. It
may cause damage
to mower, and could
break causing per-
sonal injury.
Figure 5-2
Maintenance
NOTE: Always remove blade from the adapter for testing
balance.
7. The blade can be tested for balance by balancing it
on a round shaft screwdriver. Remove metal from the
heavy side until it balances evenly.
8. Before reassembling the blade and the blade adapter
to the unit, lubricate the engine crankshaft and the
inner surface of the blade adapter with light oil.
9. Install the blade adapter on the crankshaft with the
“star” away from the engine. See Figure 5-2. Place
the blade with the side marked “bottom” (or with part
number) facing away from the adapter. .Align the
blade bell support over the blade with the tabs in the
holes of the blade and insert the hex bolt.
10. Tighten the hex bolt to the torque listed below:
Blade Mounting Torque
Center Bolt 450 in. lb. min., 600 in.lb. max.
To insure safe operation of your unit, ALL nuts and bolts
must be checked periodically for correct tightness.
Cutting grass in sandy
soil condition causes
abrasive wear to the
blade.
Rear Flap Replacement
The rear flap is attached to the back of the mower deck,
and is designed to minimize the possibility that objects
will be thrown from the rear of the mower toward the
operator. If the rear flap becomes damaged, replace as
follows.
1. To remove the old rear flap, lift rear door, and press
flap in on either side to remove from hole. See Figure
5-3.
2. Remove flap from opposite hole and replace with new
flap following these steps in reverse order.
Off-Season Storage
The following steps should be taken to prepare your lawn
mower for storage.
1. Clean and lubricate mower thoroughly as described in
the lubrication instructions.
2. We do not recommend the use of a pressure washer
or garden hose to clean your unit.
3. Refer to engine manual for correct engine
storage instructions.
4. Coat mower’s cutting blade with chassis grease to
prevent rusting.
5. Store mower in a dry, clean area. Do not store next to
corrosive materials, such as fertilizer.
NOTE: When storing any type of power equipment in
a poorly ventilated or metal storage shed, care should
be taken to rust-proof the equipment. Using a light oil or
silicone, coat the equipment, especially cables and all
moving parts of your lawn mower before storage.
Figure 5-3