Perkins 1706J-E93TA Operation And Maintenance Manual page 87

M0087475-03
5. Reinstall the belt guard, refer to OEM for the
correct procedure.
If new drive belts are installed, check the drive belt
tension again after 30 minutes of engine operation at
the rated rpm.
Belt Tension Chart
Table 17
New Belt Tension Used Belt Tension
801 N (180 lb) 645 N (145 lb)
Replace
To replace the fan belts, refer to Disassembly and
Assembly, V-Belts- Remove and Install.
Coolant Temperature
Regulator - Replace
Replace the water temperature regulator before the
water temperature regulator fails. Replacing the
water temperature regulator is a recommended
preventive maintenance practice. Replacing the
water temperature regulator reduces the chances for
unscheduled downtime. Refer to this Operation and
Maintenance Manual, "Maintenance Interval
Schedule" for the proper maintenance interval.
A water temperature regulator that fails in a partially
opened position can cause overheating or
overcooling of the engine.
A water temperature regulator that fails in the closed
position can cause excessive overheating. Excessive
overheating could result in cracking of the cylinder
head or piston seizure problems.
A water temperature regulator that fails in the open
position will cause the engine operating temperature
to be too low during partial load operation. Low
engine operating temperatures during partial loads
could cause an excessive carbon buildup inside the
cylinders. This excessive carbon buildup could result
in accelerated wear of the piston rings and wear of
the cylinder liner.
Reset Tension
378 N (84 lb)
i07297206
Coolant Temperature Regulator - Replace
NOTICE
Failure to replace your water temperature regulator
on a regularly scheduled basis could cause severe
engine damage.
Perkins engines incorporate a shunt bypass design
cooling system and require operating the engine with
a water temperature regulator installed.
If the water temperature regulator is installed incor-
rectly, the engine may overheat, causing cylinder
head damage. Ensure that the new water tempera-
ture regulator is installed in the original position. En-
sure that the water temperature regulator vent hole is
open.
Do not use liquid gasket material on the gasket or cyl-
inder head surface.
Refer to two articles in the Disassembly and
Assembly Manual, "Water Temperature Regulators -
Remove and Water Temperature Regulators - Install"
for the replacement procedure of the water
temperature regulator, or consult your Perkins dealer.
Note: If the water temperature regulators are
replaced, drain the coolant from the cooling system
to a level that is below the water temperature
regulator housing.
Cooling System Coolant
(DEAC) - 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.
Note: Inspect the water pump and the water
temperature regulator after the cooling system has
been drained.
87
Maintenance Section
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