Cub Cadet Yanmar 3TNV72 - Manual (Page 82)

PERIODIC MAINTENANCE
TNV IDI Service Manual 5-21
Periodic Maintenance Procedures
3. Tighten the V-belt to the proper tension. There
must be clearance (Figure 5-6, (1)) between
the V-belt and the bottom of the pulley groove. If
there is no clearance (Figure 5-6, (2)) between
the V-belt and the bottom of the pulley groove,
replace the V-belt.
Figure 5-6
4. Check the V-belt for cracks, oil or wear. If any of
these conditions exist, replace the V-belt.
• “New V-belt” refers to a V-belt which has been
used less than 5 minutes on a running engine.
• “Used V-belt” refers to a V-belt which has been
used on a running engine for 5 minutes or
more.
5. Inspect the condition of the used V-belt. There
must be clearance (Figure 5-6, (1)) between
the V-belt and the bottom of the pulley groove. If
there is no clearance (Figure 5-6, (2)) between
the V-belt and the bottom of the pulley groove,
replace the V-belt.
6. Install the new V-belt. Refer to the table for
proper tension.
7. After adjusting, run the engine for 5 minutes or
more. Check the tension again using the
specifications for a used V-belt.
After you complete the initial 50 hour maintenance
procedures, perform the following procedures every
50 hours thereafter.
• Drain Fuel Filter / Water Separator
• Check Battery
Drain Fuel Filter / Water Separator
New V-Belt Tension
A B C
5/16 - 7/16 in.
(8 - 12 mm)
3/16 - 5/16 in.
(5 - 8 mm)
1/4 - 7/16 in.
(7 - 11 mm)
Used V-Belt Tension
A B C
3/8 - 1/2 in.
(10 - 14 mm)
1/4 - 3/8 in.
(7 - 10 mm)
5/16 - 1/2 in.
(9 - 13 mm)
0000584
(2)
(1)
Every 50 Hours of Operation
A
DANGER
FIRE AND EXPLOSION HAZARD!
• Diesel fuel is flammable and explosive
under certain conditions.
• When you remove any fuel system
component to perform maintenance
(such as changing the fuel filter) place
an approved container under the
opening to catch the fuel.
• NEVER use a shop rag to catch the
fuel. Vapors from the rag are
flammable and explosive.
• Wipe up any spills immediately.
• Wear eye protection. The fuel system
is under pressure and fuel could spray
out when you remove any fuel system
component.
• Failure to comply will result in death or
serious injury.
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