Toro Commercial Products Troubleshooting Guide Groundsmaster 345 325 D 96904SLDEX 1 Product Overview

TORO GM 345
Ford VSG-411 Gas Engine 17
Cylinder Leakage Test.
The cylinder leakage test can locate the following problems:
1.
2.
3.
4.
Leaking intake valves.
Air leaking from carburetor.
Leaking exhaust valves.
Air leaking from muffler.
Leaking cylinder head gaskets.
Air leaking externally by head gasket.
Worn piston rings.
Air leaking from breather or dipstick tube.
NOTE. There will always be some air leakage past the rings. Use the tester gauge to determine the severity of
the leak.
With the engine rotated until the piston is at the top of travel on the compression stroke. The cylinder is filled
with air through the spark plug opening, The leakage tester will display the percentage of air lost when the piston
is at the top part of the compression stroke.
A cylinder leakage of 25 percent or less is acceptable.
Compression Testing.
1.
2.
3.
4.
5.
Make sure the batteries are fully charged.
Remove all the spark plugs.
Set the throttle to high idle and the choke in the wide open position.
Install an automotive type (0-300 PSI) compression gauge.
Using an auxiliary starting switch, crank the engine (with the ignition switch off) at least five compression
strokes and record the highest reading.
6.
7.
Normal compression should read 170 to 185 PSI depending on engine temperature and cranking speed.
Repeat the test on each cylinder.
If one or more cylinders read low, and a cylinder leakage tester is not available, squirt approximately one
tablespoon of engine oil on top of the pistons in the low reading cylinders.
Repeat compression test on these cylinders.
1.
2.
3.
If the compression improves considerably, the piston rings are at fault.
If the compression does not improve, the valves are sticking or seating poorly.
If two adjacent cylinders indicate low compression pressures and squirting oil in the pistons does not
increase the compression, the cause may be a leaking cylinder head gasket between the two cylinders.
Notes
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Product Specification
CategoriesLawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals
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- 84 pages
Document TypeCatalog
LanguageEnglish
Product BrandToro. 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, Lawn Mower
Document File TypePDF
Publishertoro.com
Wikipedia's PageToro Company
CopyrightAttribution Non-commercial
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One thought on “Toro Commercial Products Troubleshooting Guide Groundsmaster 345 325 D 96904SLDEX 1 Product Overview

  1. “Toro Commercial Products Troubleshooting Guide Groundsmaster 345
    325 D 96904SLDEX 1 Product Overview” ended up being
    a fantastic post and also I actually was really joyful to discover it.
    Thanks for your time,Gabriela

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