Section 10: Maintenance - MTD E602E, E642E, E642F, E662E, E662H, 614E, E644E, E644F, E6A4E Operator's Manual

Bearings
Figure 27
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
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 27. 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 710-0890A (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.
Shear
Bolts
require checking.
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:
wire from the spark plug and ground.
AUGER BELTS
NOTE:
It is necessary to remove both belts in
order to change either one. If changing just one belt,
be certain to check the condition of the other belt.
1. Remove the plastic belt cover on the front of the
engine by removing the two self-tapping screws.
See Figure 28.
If
2. Drain the gasoline from the snow thrower, or
place a piece of plastic under the gas cap.
3. Tip the snow thrower up and forward so that it
rests on the auger housing.
Belt
Cover
4. Remove six self-tapping screws from the frame
cover underneath the snow thrower.
16
Disconnect the spark plug
Self-Tapping
Screws
Figure 28