MTD E644E - Manual (Page 16)

16
SECTION 9: LUBRICATION
WARNING: Disconnect the spark plug
wire and ground against the engine
before performing any lubrication or
maintenance.
ENGINE
Refer to engine manual for all engine lubrication
instructions.
WARNING: When following instruct-
ions in separate engine manual for
draining oil, be sure to protect frame to
avoid oil dripping onto transmission
parts.
CHUTE CRANK
The gear on the end of the chute crank should be
greased with multi-purpose automotive grease once
a season.
AUGER SHAFT
At least once a season, remove shear bolts on auger
shaft. Oil or spray lubricant inside shaft. See Figure
28. Also lubricate the auger bearings at least once a
season.
Figure 28
SPROCKET SHAFT
Lubricate the sprocket shaft with a light oil at least
once a season or after every 25 hours of operation.
IMPORTANT: Keep all grease and oil off of the
rubber friction wheel and aluminum drive plate.
DRIVE AND SHIFTING MECHANISM
At least once a season or after every 25 hours of
operation, remove the bottom frame cover. Lubricate
any chains, sprockets, gears, bearings, shafts, and
shifting mechanism at least once a season. Use
engine oil or a spray lubricant. Avoid getting oil on
rubber friction wheel and aluminum drive plate.
GEAR CASE
The gear case is lubricated with grease at the
factory and does not require checking. If
disassembled for any reason, lubricate with 2
ounces of shell grease, part number 737-0168.
IMPORTANT: Do not overfill the gear case.
Damage to the seals could result. Be sure the vent
plug is free of grease in order to relieve pressure.
SECTION 10: MAINTENANCE
AUGERS
The augers are secured to the spiral shaft with two
shear bolts and hex lock nuts. Refer to Figure 28. If
you hit a hard foreign object or ice jam, the snow
thrower is designed so that the hex bolts will shear.
If the augers will not turn, check to see if the bolts
have sheared. Two replacement shear bolts and hex
lock nuts have been provided with the snow thrower.
For future use, order part number 710-0890 (shear
bolt 5/16-18 x 1.5" long) and 712-0429 (hex insert
lock nut 5/16-18 thread).
SHAVE PLATE AND SKID SHOES
The shave plate and skid shoes on the bottom of the
snow thrower are subject to wear. They should be
checked periodically and replaced when necessary.
To remove skid shoes, remove the four carriage
bolts, belleville washers and hex nuts which attach
them to the snow thrower. Reassemble new skid
shoes with the four carriage bolts, belleville washers
(cupped side goes against skid shoes) and hex nuts.
Make certain the skid shoes are adjusted to the
same level on both sides.
To remove shave plate, remove the carriage bolts,
belleville washers and hex nuts which attach it to the
snow thrower housing. Reassemble new shave
plate, making sure heads of the carriage bolts are
to the inside of the housing. Tighten securely.
ENGINE
Refer to separate engine manual for all engine
maintenance procedures.
BELT REMOVAL AND REPLACEMENT
WARNING: Disconnect the spark plug
wire from the spark plug and ground.
Bearings
Shear Bolts