ENGINE
A. Vertical scratches that appear all the way
around the piston sometimes is combined with
discoloration (see Figure 76). Scratches all the
way around the piston indicate high hours or
dirt ingestion. If the scratches are in limited
areas, look more closely to see if they are in
line with the ports. On a NEW engine, if the
ports are not properly deburred, piston damage
can result. This can appear ONLY on engines
with very few hours on them. The damage is
immediate. If the engine has more than a
couple of hours use, inspect the carburetor,
reed area, and crankcase for any sign of dirt.
Much of the dirt that an engine ingests does its
damage and goes out the exhaust. Any dirt
found in these areas indicate that the engine
has ingested a great deal more. If an engine
has ingested dirt, the best solution is a short
block replacement as the bearings have been
exposed to that dirt also.
C. Cylinder damage is usually less than the
damage to the piston. As the cylinder liner is
made of harder material, it can stand more
abrasion. However, it is generally best to
replace the short block if severe piston damage
is present, as it is the most cost-effective repair.
Reed Valve Service
(DuraForce Engines Only)
The reed assemblies (see Figure 77) permit fuel
mixtures to enter the crankcase on compression
strokes and to trap fuel mixtures in the crankcase on
power strokes.
Figure 77
0720-018
1.
2.
Check clearance between tip of reed and plate;
replace reeds if clearance is more than .020"
(.5
mm).
Figure 76
0893-027
CAUTION: Do not use compressed air to clean
reeds.
B. Discoloration of a piston is often caused by
improper lubrication. Without the necessary
lubrication, friction increases and overheats the
piston. Often in an engine that failed due to
improper lubrication, the piston is discolored,
the rings may be stuck, yet the lower rod and
crankshaft bearings might appear usable. As
the piston is the source of the friction and heat,
the bearings, further from the heat source, may
not appear damaged. However, we would not
recommend re-using bearings in an engine that
failed due to improper lubrication.
Clean reeds carefully, by hand, using carburetor
solvent.
43
| Categories | Snow Blower Manuals, Toro Snow Blower |
|---|---|
| Tags | Toro 3650 GTS, Toro 38409, Toro 38412, Toro 38413, Toro 38414, Toro 38418, Toro 38419, Toro 38422, Toro 38424, Toro 38428, Toro 38429, Toro 38432, Toro 38433, Toro 38437, Toro 38438, Toro 38440, Toro 38441, Toro 38442, Toro 38445, Toro 38515, Toro 38516, Toro 38517, Toro 38518, Toro 38537, Toro 38538, Toro 38600, Toro 38601, Toro 38602, Toro 38603, Toro 38610, Toro 38611, Toro CCR 2400, Toro CCR 2400 GTS, Toro CCR 2450 GTS, Toro CCR 2500 GTS, Toro CCR 3000, Toro CCR 3000 GTS, Toro CCR 3650 GTS, Toro Power Max 6000, Toro Power Max 726TE, Toro Snow Commander |
| Model Number | 38412, 38418, 38413, 38419, 38422, 38424, 38440, 38428, 38429, 38432, 38433, 38437, 38438, 38439, 38440, 38441, 38442, 38445, 38515, 38537, 38538, 38600, 38601, 38602, 38603, 38610, 38611, 38419, 38516, 38517, 38518 |
| Model Year | 1999, 2000, 2001, 2002, 2004, 2005, 2007 |
| Download File |
|
| Document Type | Engine Service Manual |
| Language | English |
| Serial Number | 240000001 - 240999999 |
| Product Name | Toro Snow Commander Snowthrower |
| Product Brand | Toro. Customer Service Representatives are available by phone:
Monday - Friday 7:30 a.m. to 9:00 p.m. (CDT) - Saturday 8:00 a.m. to 8:00 p.m. (CDT) - Sunday 10:00 a.m. to 8:00 p.m. (CDT)
Canada 1-888-225-4886 USA 1-888-384-9939, Snow Blower |
| Product Type | Snowthrower |
| Product Series | Single Stage, Single Stage Snow Commander |
| Swath | 24 inch |
| Discharge | Single Stage |
| Engine Manufacturer | Toro |
| Engine Oil Type | Toro 2 cycle / NMMA-TCW3 |
| Engine Motor Model # | R-tek |
| Engine Motor Size | 7 hp |
| Engine Motor Type | 2 Cycle EPA2 |
| Document File Type | |
| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
| Copyright | Attribution Non-commercial |
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