Jacket Water Heater - Check - Perkins 4008-30 Operation And Maintenance Manual

SEBU9077-02
Illustration 74
(1) Clamp torque 7 N·m (62 lb in)
Clamps and V-Band Clamp Torques
Table 16
Clamps and V-band Clamp Torques
Clamp
1
2
3

Jacket Water Heater - Check

(If Equipped)
Jacket water heaters help to improve starting in
ambient temperatures that are below 21 °C (70 °F).
All installations that require automatic starting should
have jacket water heaters.
Check the operation of the jacket water heater.
Check the operation of the circulation pump, if
equipped. For an ambient temperature of 0 °C
(32 °F), the heater should maintain the jacket water
coolant temperature at approximately 32 °C (90 °F).
(2) Clamp torque 9 N·m (79 lb in)
Torque
7 N·m (62 lb in)
9 N·m (79 lb in)
10 N·m (88 lb in)
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Jacket Water Heater - Check

Overhaul (Major)
Scheduling a Major Overhaul
The need for a major overhaul is determined by
several factors:
• An increase of oil consumption
• An increase of crankcase blowby
• A decrease and variation of cylinder compression
Other factors should be considered for determining a
major overhaul:
• The service hours of the engine
• The wear metal analysis of the lube oil
• An increase in the levels of noise and vibration
An increase of wear metals in the lube oil indicates
that the bearings and the surfaces that wear may
need to be serviced. An increase in the levels of
noise and vibration indicates that rotating parts
require service.
89
Maintenance Section
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