Cub-cadet Yanmar 3TNV72 User Manual download pdf (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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