Denyo DIS-390ES, Instruction Manual, Page: 42 / 67

39
7-4 Checking/every 250 hours
(1) Checking on battery specific gravity.
If battery is likely to be discharged due to failure in startup of the engine, measure the
specific gravity of battery acid.
The relation between battery charge condition (charging rate) and specific gravity is as
shown below.
Charging tem
rate (
％ ) ( ℃ )
20
0
-10
100 1.28 1.29 1.30
90 1.26 1.27 1.28
80 1.24 1.25 1.26
75 1.23 1.24 1.25
(2) Replacement of engine oil
Replacement is refer to
「
7-2.(1) Replacement of engine oil See p.37
」
.
(3) Checking and cleaning the drain filter
First, take off the drain filter, and clean the filter and orifice with clean well-pressed air.
Parts number of drain filter
E91191 00404