Cub Cadet Yanmar 3TNV72 User Manual

Page 98

PERIODIC MAINTENANCE

TNV IDI Service Manual

5-37

Periodic Maintenance Procedures

2. Remove the diaphragm cover, spring,

diaphragm plate (Figure 5-18, (5)) and
diaphragm.

3. Inspect the diaphragm for tears. Inspect the

spring for distortion. Replace components if
necessary.

4. Reinstall the diaphragm, diaphragm plate,

spring and diaphragm cover. Tighten the
diaphragm bolts to the specified torque. See
Tightening Torques for Standard Bolts and Nuts
on page 4-22.

Failure of the diaphragm and / or spring will cause
the loss of pressure control and allow an excessive
amount of crankcase fumes to be routed to the
intake manifold. This could result in excessive
deposits in the intake system, high engine exhaust
smoke levels, excessive engine oil consumption,
and / or engine run-on due to the burning of the
engine oil.

Perform the following maintenance every 2000
hours of operation.

• Check and Replace Fuel Hoses and Engine

Coolant Hoses

• Lap the Intake and Exhaust Valves

Check and Replace Fuel Hoses and Engine
Coolant Hoses

Regularly check the fuel system and engine coolant
system hoses. If they are cracked or degraded,
replace them. Replace the hoses at least every two
years. See Check and Replace Fuel Hoses and
Engine Coolant Hoses on page 5-37.

Lap the Intake and Exhaust Valves

Adjustment is necessary to maintain proper contact
of the valves and seats. See Inspection of Intake
and Exhaust Valves on page 6-27.

Every 2000 Hours of Operation

CAUTION

• ALWAYS be environmentally

responsible.

• Follow the guidelines of the EPA or

other governmental agencies for the
proper disposal of hazardous
materials such as engine oil, diesel
fuel and engine coolant. Consult the
local authorities or reclamation facility.

• NEVER dispose of hazardous

materials irresponsibly by dumping
them into a sewer, on the ground, or
into ground water or waterways.

• Failure to follow these procedures may

seriously harm the environment.

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