If the belt is too loose, vibration causes unnecessary
wear on the belt and pulleys. A loose belt may slip
enough to cause overheating.
The correct tension for a new belt is 400 N (90 lb) to
489 N (110 lb). The correct tension for a used belt
that has been in operation for 30 minutes or more at
the rated speed is 267 N (60 lb) to 356 N (80 lb).
The belt tension should be checked at the center
point of the belt between the pulleys.
Adjust
Illustration 52 g03886616
Typical example
1. Loosen bolt (1) and loosen bolt (3).
2. Loose nut and bolt (4).
3. Move the alternator (2) to adjust the belt (4) to the
required tension.
4. Tighten bolt (1) and bolt (3) to a torque of 22 N·m
(194 lb in). Tighten nut and bolt (4) to a torque of
22 N·m (194 lb in).
Engines Equipped with a Balancer
If the engine is equipped with a balancer, the
alternator is supplied by the Original Equipment
Manufacturer (OEM). The belt adjustment procedure
will be provided by the OEM. Refer to the OEM for
the correct inspect and adjust procedures.
Illustration 53 g06546562
Typical example of an engine equipped with a
balancer
() Alternator
() Alternator Belt
i08105118
Coolant (Commercial Heavy-
Duty) - Change
Clean the cooling system and flush the cooling
system before the recommended maintenance
interval if the following conditions exist:
• The engine overheats frequently.
• Foaming is observed.
• The oil has entered the cooling system and the
coolant is contaminated.
• The fuel has entered the cooling system and the
coolant is contaminated.
NOTICE
When any servicing or repair of the engine cooling
system is performed, the procedure must be per-
formed with the engine on level ground. Level ground
will allow you to check accurately the coolant level.
This procedure will also help in avoiding the risk of in-
troducing an air lock into the coolant system.
86 M0094137-02
Maintenance Section
Coolant (Commercial Heavy-Duty) - Change
To Next Page
Loading...