Cub Cadet Yanmar 3TNV72 - Manual (Page 97)

PERIODIC MAINTENANCE
5-36 TNV IDI Service Manual
Periodic Maintenance Procedures
Perform the following maintenance every 1500
hours of operation.
• Inspect, Clean and Test Fuel Injectors
• Inspect Crankcase Breather System
Inspect, Clean and Test Fuel Injectors
(if required)
Proper operation of the fuel injectors is required to
obtain the optimum injection pattern for full engine
performance. The EPA / ARB requires that the fuel
injectors are inspected, cleaned and tested (if
required) every 1500 hours. See Testing of Fuel
Injectors on page 7-24.
This procedure is considered normal maintenance
and is performed at the owner’s expense. This
procedure is not covered by the Yanmar Limited
Warranty.
Inspect Crankcase Breather System
Proper operation of the crankcase breather system
is required to maintain the emission requirements
of the engine. The EPA / ARB requires that the
crankcase breather system is inspected every 1500
hours.
There are three different crankcase breather
systems used on the TNV engines. Only the
non-turbo TNV engines crankcase breather system
requires periodic maintenance.
The non-turbo TNV engines use a crankcase
breather system that has a spring-backed
diaphragm (Figure 5-18, (1)) in the valve cover
(Figure 5-18, (2)). When the crankcase pressure
reaches a predetermined value, the diaphragm
opens a passage that allows crankcase fumes to
be routed to the intake manifold.
Figure 5-18
To inspect the diaphragm and spring
(Figure 5-18, (3)):
1. Remove the bolts retaining the diaphragm
cover (Figure 5-18, (4)).
Every 1500 Hours of Operation
A
WARNING
HIGH-PRESSURE HAZARD!
• Avoid skin contact with the
high-pressure diesel fuel spray caused
by a fuel system leak such as a broken
fuel injection line. High-pressure fuel
can penetrate your skin and result in
serious injury. If you are exposed to
high-pressure fuel spray, obtain
prompt medical treatment.
• NEVER check for a fuel leak with your
hands. ALWAYS use a piece of wood
or cardboard. Have your authorized
Yanmar industrial engine dealer or
distributor repair the damage.
• Failure to comply could result in death
or serious injury.
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