MTD 241-675-000 - Manual (Page 8)

Gear Box (Self-Propelled Models Only)— Tne gear
box is lubricated with 2 ounces of High Tem|). (450°
F.) grease. Order part number 737-0133. Perodically
check lubricant level by removing the two self tapping
screws on the gear box cover and lifting off th3 cover.
Do not change grease; simply add if necess iry.
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 ar d follow
instructions carefully.
Service air cleaner every 25 hours under normal con­
ditions. Clean every few hours under extreme ly dusty
conditions. Poor engine performance and flooding
usually indicates that the air cleaner should be ser­
viced. To service the air cleaner, refer to the s eparate
engine manual packed with your unit.
The spark plug should be cleaned and the gap reset
once a season. Spark plug replacement is recommend­
ed at the start of each season; check engine manual
for correct plug type and gap specifications.
Clean the engine regularly with a cloth or bruì h. Keep
the cooling system (blower housing area) clean to per­
mit proper air circulation which is essential tc^ engine
performance and life. Be certain to remove all dirt and
combustible debris from muffler area.
BELT REPLACEMENT (Self-Propelled Models Only)
1. Remove the nozzle or impeller guard fron i front of
blower housing.
2. Remove hex bolt and lock washer from c enter of
impeller. See figure 18. A 9/16" socket wre neh with
extension is needed.
3. Remove hand knob and belleville washer from top
of housing.
4. Remove two self-tapping screws which hold the
belt guard. See figure 19. A 3/8" wrennh is re­
quired. 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
FIGURE 20.
Square
Key
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: When 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
washer.
12. Reassemble the nozzle or impeller guard.