MTD 243-685-000 - Manual (Page 8)

Gear Box (Self-Propelled Models Only)—The gear
box is lubricated with 3 ounces of High Tem|:. (450°
F.) grease. Order part number 737-0223. Peri Ddically
check lubricant level by removing the two self-tapping
screws on the gear box cover and lifting off tho cover.
Do not change grease; simply add if necessary.
ENGINE
Refer to the separate engine manual for engine
maintenance instructions.
Maintain engine oil as instructed in the separate
engine manual packed with your unit. Read an j follow
instructions carefully.
Service air cleaner every 25 hours under normal con­
ditions. Clean every few hours under extremely dusty
conditions. Poor engine performance and f coding
usually indicates that the air cleaner should be ser­
viced. To service the air cleaner, refer to the ssparate
engine manual packed with your unit.
p reset
recom-
engine
ions.
The spark plug should be cleaned and the ge
once a season. Spark plug replacement is
mended at the start of each season; check
manual for correct plug type and gap specifical
Clean the engine regularly with a cloth or brusi
the cooling system (blower housing area) c
permit proper air circulation which is esse
engine performance and life. Be certain to ren
dirt and combustible debris from muffler area. 1 . Keep
lean to
ntial to
love all
BELT REPLACEMENT (Self-Propelled Model:: Only)
1. Remove the nozzle or impeller guard from front of
blower housing.
2. Remove hex bolt and lock washer from c jnter of
impeller. See figure 18. A 9/16" socket wrench
with extension is needed.
3.
4
.
Remove hand knob and cupped washer f om top
of housing.
Remove two self-tapping screws which f old the
belt guard. See figure 19. A 3/8" wrtmch is
required. Lift off belt guard.
FIGURE 19.
5. Slide belt off the impeller pulley. Slide housing
and impeller off engine crankshaft. Be careful to
not lose square key. See figure 20.
Engine
Crankshaft
P.T.O.
Pulley Square
Key
FIGURE 20.
6. Slide impeller and blower housing assemblies off
crankshaft.
7. Remove belt from P.T.O. pulley and install new
belt. See figure 20.
NOTE: H//7en reassembling the new belt, the aid of
another person will be helpful.
8. Turn the crankshaft until the keyway on shaft is
directly on top. While holding housing assembly
and impeller assembly, line up the keyway on the
pulley with the key on the crankshaft, and slide
housing and impeller assemblies onto crankshaft.
9. Secure impeller to crankshaft with hex bolt and
lock washer, removed in step 2. Tighten securely.
10. Slip belt over impeller pulley. Reassemble the
belt guard.
11. Secure blower housing with hand knob and wash­
er.
12. Reassemble the nozzle or impeller guard.