Shindaiwa 357 Service Manual download pdf (Page 109)

Q Shindaiwa Inc. 1995 109

Steady flow at

bar pad; no oil

to chain

■ System is functioning properly

Bubbles appear

at discharge

port

■ Oil tank is empty

■ Air leak in the suction side 

of the system

Refill the tank

Check pump gasket/elbow

(where used); suction line

Symptom Possible Cause Solution

Check guide bar passages

Flow is weak

■ Flow adjustment set too low

■ Clogged filter or tank vent

■ Oil suction tube is collapsing

■ Wrong type or weight of oil

■ Pump is scored internally

■ Pump shaft worn at the bevel

Reset adjustment to higher setting

Clean filter or vent as required

Replace tube

Replace with correct oil

Replace pump

Replace pump

No or irregular

oil flow

■ Clogged filter or tank vent 

■ Tank is empty

■ Pump drive is broken

■ Pump gear is stripped

■ Crankcase damage (bar 

pad cracked)

Clean filter or vent as required

Refill tank

Replace pump drive

Replace gear or pump as required

Replace crankcase

Oil is leaking

from saw

■ Oil is wrong type/viscocity



■ Oil fill cap/gasket is damaged

■ Tank vent faulty/missing

■ Bar studs are loose

■ Oil tank or gasket is damaged

Refill with Shindaiwa Premium Bar

and Chain Oil

Repair or replace cap as required

Repair or replace as required

Repair or replace crankcase half

Replace gasket (where used)

or crankcase as required

Oil Pumps Section 11

Oil Pump

Troubleshooting

(Figure 11.2)

Outright pump failure is unusual, and scoring or

galling of the polished pump bore can usually

be traced to acids or particulates from pumping

reclaimed or dirty oil. Damage to the oil pump

driven gear is often the result of operating the

saw with accumulations of dirt or grit trapped in

the pump gears. For operation in very dusty

conditions, special oil pump cover kits are

available for saw models 488, 577, 680, 695,

and 757 (Figure 11.3).

IMPORTANT!

Pump gears can also be damaged by

excessive lash from operating with incorrect

bar oil or with air bubbles entering through

the suction side of the system.

Provided the pump gears are intact and the

pump shaft is free to move, most oil delivery

problems can be traced to the suction side of

the oiling system. Such problems are often

caused by:

■ Incorrect bar oil (type or weight)

■ Clogged oil filter; dirty or contaminated oil

■ Air entering suction side of system

■ Clogged oil tank vent

Figure 11.3 “Fuzzy” Cover for Very Dusty Condtions

(Model 695 shown)

LUB-1

OIL PUMPS

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