Cooling System Coolant (Elc) - Change - Perkins 2506 Operation And Maintenance Manual

58
Maintenance Section

Cooling System Coolant (ELC) - Change

4. Move the assembly in order to increase or
decrease the belt tension. Refer to Systems
Operation, Testing and Adjusting, "Belt Tension
Chart".
5. Tighten the setscrew for the adjustment link (1).
Tighten alternator pivot bolt (2).
Refer to Specifications, "Alternator Mounting" for
correct torque.
6. Reinstall the belt guard.
If new alternator belts are installed, check the
tension of the alternator belt again after 10
minutes of engine operation at the rated rpm.
7. Remove the belt guard and check the belt tension.
When the correct belt tension is obtained, fit the
belt guard.
Adjustment of the Fan Drive Belt
1. Remove the belt guard.
2. Loosen the large locknut and turn the adjustment
screw (3) until the correct belt tension is obtained.
3. Tighten the large locknut (3) and recheck the belt
tension.
4. If the belt tension is correct, loosen the adjustment
screw (3) in order to release the tension.
5. Reinstall the belt guard.
If new alternator belts are installed, check the
tension of the alternator belt again after 10
minutes of engine operation at the rated rpm.
6. Remove the belt guard and check the belt tension.
When the correct belt tension is obtained, fit the
belt guard.
Cooling System Coolant (ELC)
- Change
NOTICE
Care must be taken to ensure that fluids are con-
tained during performance of inspection, mainte-
nance, testing, adjusting and repair of the product.
Be prepared to collect the fluid with suitable contain-
ers before opening any compartment or disassem-
bling any component containing fluids.
Dispose of all fluids according to Local regulations
and mandates.
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened
component life.
Clean the cooling system and flush the cooling
system before the recommended maintenance
interval if the following conditions exist:
• The engine overheats frequently.
• Foaming of the coolant 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.
Note: When the cooling system is cleaned, only
clean water is needed when the ELC is drained and
replaced.
Note: Inspect the water pump and the water
temperature regulator after the cooling system has
been drained. This is a good opportunity to replace
the water pump, the water temperature regulator and
the hoses, if necessary.
Drain
Pressurized System: Hot coolant can cause seri-
ous burns. To open the cooling system filler cap,
stop the engine and wait until the cooling system
components are cool. Loosen the cooling system
pressure cap slowly in order to relieve the
pressure.
1. Stop the engine and allow the engine to cool.
Loosen the cooling system filler cap slowly in
i02579635
order to relieve any pressure. Remove the cooling
system filler cap.
2. Open the drain cock or remove the drain plug on
the radiator.
Allow the coolant to drain.
Dispose of used engine coolant or recycle. Various
methods have been proposed to reclaim used cool-
ant for reuse in engine cooling systems. The full distil-
lation procedure is the only method acceptable by
Perkins to reclaim the coolant.
SEBU8313-02
NOTICE
NOTICE