Operation and Maintenance Manual and User Service Guide for Industrial Power WP10 Series Diesel Engine
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1 Fuel, lubricating oil and coolant used for diesel engines
1.1 Oil
1.1.1 Quality grade
Refer to the quality and feature to divide the oil into API and GB standards.
Oil allowed to be used:
API grade: CF-4 and CH-4
GB grade: CF-4 and CH-4
It is allowed to use the oil with higher quality grade to take place of one with
lower quality grade.
1.1.2 Oil viscosity
Refer to table 1-1 for selection of oil viscosity.
Table 1-1 The relation between oil viscosity and ambient temperature
Lubricating
oil
SAE Viscosity grade
Ambient temperature (
℃
)
5W/30
30-35
10W/30
25-35
15W/40
20-40
20W/50
15-50
Notice: Before starting of diesel engine, thoroughly check the oil
level in the oil sump.
Do not check engine oil level with engine running.
It is not allowed to mix the different grades of oil.
Suggestion:
It is recommended to use the Weichai special oil, which is mixed by the
imported quality basic oil and selected additive. This oil is sold at all the
service stations of Weichai at the unified national sale price.
