Yanmar YM155d Service Manual page 146

XI I I. TRACTOR TROUBLE-SHOOTING
When asked by a customer t o perform repairs and
services on a tractor,
it
is essential that you first
find out from the customer the full details of the
trouble, diagnose
it
correctly, and then perform
repairs swiftly and in
a
manner that will fully
satisfy the customer.
No customer will want t o have a lot of time spent
on repairs and services nor will he want the work
t o cost a lot of money. Therefore, always try t o
carry out the repairs and services b y placing your-
self in the customer's shoes.
The trouble-shooting procedures described in this
chapter will list the symptoms on a section by
section basis, and will explain what to do about
them. When the trouble has been pinpointed and
you are about t o carry out the work, do
it
prop-
erly and completely, in accordance with the
maintenance standards described in the preceding
chapters.
Poor maintenance work will not only damage
the establishment's reputation but could also lead
t o serious accidents, so after the work has been
completed and the tractor is ready t o be delivered
t o the customer, always recheck the work carried
out.
Troubleshooting will be explained in the follow-
ing order:
(1) Engine and related items
(2)
Electrical systems
(3) Brake system
(4)
clutch and related items
(5) Transmission and related items
(6) P.T.O. and related items
(7) Hydraulic system
(8) Steering and suspension systems