CHAPTER 2 8454
2-12
D569-W02 May-2003
569W221A
569W220A
(1) Bypass Valve
(2) Bypass Adjusting Spring
(3) Filter Element
(4) Relief Valve Ball
(5) Relief Adjusting Spring
(a) To Idle Gear, Camshaft and Rocker Arm
(b) From Oil Pump
(c) To Crankshaft Journal Crankpin
(d) Drain of Relief Valve
(A) At lower Oil Pressure
(49 kPa (0.5 kgf/cm
2
, 7 psi) or less)
(B) At Proper Oil Pressure
(1) Warning Lamp (6) Rubber washer
(2) Battery (7) Oil Pressure
(3) Contact Movable (8) Cylinder Block
(4) Contact Cup (9) Pressure
(5) Diaphragm
D. OIL PRESSURE SWITCH
The oil pressure switch is installed on the cylinder
block and leads to the oil passage of the lubricating
oil. When the oil pressure falls below the specified
value, the contacts of the oil pressure switch closes to
turn on the warning lamp (1).
C. OIL FILTER AND RELIEF VALVE
The lubricating oil force-fed by the pump is filtered by
the filter cartridge, passing through the filter element
from the outside to the inside. When the filter element
accumulates dirt and the pressure difference between
the inside and the outside rises more than 98 kPa
(1.0 kgf/cm
2
, 14 psi), the bypass valve (1) opens to
allow the oil to flow from the inlet line to outlet line,
bypassing the filter element. The relief valve ball (4) in
the inlet line allows oil to prevent damage to the lubri-
cating system, when the oil pressure rises more than
441 kPa (4.5 kgf/cm
2
, 64 psi).
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K&T Saw Shop 606-678-9623 or 606-561-4983
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