Oil Pumps - Shindaiwa 300 Service Manual

Section
11 Oil Pumps
Operation
AII Shindalwa saws fe ature Mlkuni
M
posltlve
disp lacement
01 1
purnp s. See me ac ornpany­
Ing Table lar speclfic applica ions .
The pump ís driver by a worm gear a
tac hed lo the saw's clutch drum , and dellvers
oil lo the guíde bar only when lhe clutch is
engaged an d the saw chain
IS
movlng
The pump shaft is sprillg loaded and has a
bevel at one end, causíng the shaft o travel
fore- an d-afl in the pump body bore and
fu nc tíon as a pistan whenever lhe shaft
15
rotated (Fig ure 11.1)
Except 'or Model 357 p mp flow rate on all
saws can be regulated by turning an adjl.Jster
shaft
lo increase or decrease pump shart stroke.
Oil Pump Part Numbers
Pum p Output
@
Max.
Model Part No.
(ce/mm)
300, 300S 22154-55200 165
360, 377
22156-55 200
15
357
72320-55200
10
488,575,577
22160-55200 16.5
680, 695
757 22 169-55200 126
Crankcase Oi l passage
Pum p
Grom met
Tank Vent
Fil ter
----~_JJ,~
Sprin g loading torces th e
beveled pump shaft
against the adjuster. Pump Shaft
As th e pump
shaft rotates, th e
bevel cau ses the
Adju ster
sha tt to recipro­
cate within the
Discharge
pump body bore.
Figure
11 I
O"
Pump OperdllOn
Disc harge Port
Ba r Pad
Grommet
Suction
Hose
Figure 11.2 Pump Components and Flow Ro ¡linO !mslallallon may vary}
'~
Shindaiwa Ine . 1995
108