Troy-Bilt J860 - Manual (Page 16)

Service
7
16
5. Lubricate the engine crankshaft and the inner surface
of the blade adapter with light oil. Slide the blade
adapter (and wave washer, if applicable) onto the engine
crankshaft. Place the blade on the adapter such that the
side of the blade marked “Bottom” (or with part number)
faces the ground when the mower is in the operating
position. Make sure that the blade is aligned and seated on
the blade adapter flanges.
6. Place blade bell support on the blade. Align notches on the
blade bell support with small holes in blade.
7. Replace hex bolt and tighten hex bolt to torque: 450 in. lbs.
min., 600 in. lbs. max.
To ensure safe operation of your mower, periodically check the
blade bolt for correct torque.
Belt Care
NOTE: Several components must be removed in order to change
the mower’s belt. See an authorized Troy-Bilt Service Dealer to
have your belt replaced.
Replacing Battery
WARNING: Batteries contain sulfuric acid which
may cause burns. Do not short circuit or mutilate
batteries in any way. Do not put batteries in fire as
these may burst or release toxic materials.
Remove the ignition key. 1.
Remove the three screws securing battery harness 2.
assembly to the speed control housing and place them to
the side.
Carefully remove the harness assembly from the speed
3.
control housing. See Fig. 7-2.
Blade Care
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.
Periodically inspect the blade adapter for cracks, especially if you
strike a foreign object. Replace when necessary. Follow the steps
below for blade service.
Disconnect spark plug boot from spark plug. Turn mower 1.
on its side making sure that the air filter and the carburetor
are facing up.
Remove the bolt and the blade bell support which hold the
2.
blade and the blade adapter to the engine crankshaft. See
Fig. 7-1.
Remove blade and adapter from the crankshaft. See Fig.
3.
7-1.
IMPORTANT: When removing these items, a wave washer
may also come off with the adapter. Be sure to include this
washer when reassembling the blade adapter. Failure to do
so will result in the unit not being able to change speeds.
Remove blade from the adapter for testing balance.
4.
Balance the blade on a round shaft screwdriver to check.
Remove metal from the heavy side until it balances evenly.
When sharpening the blade, follow the original angle of
grind. Grind each cutting edge equally to keep the blade
balanced.
WARNING: An unbalanced blade will cause
excessive vibration when rotating at high speeds. It
may cause damage to mower and could break
causing personal injury.
Figure 7-1
Figure 7-2
Tab
Slot
Blade
Blade
Adapter
Bolt
Blade Bell
Support