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Maintenance
Lubricants and operating fluids
Synthetic lubricating oils
Oil category
Oil category 2
Oil category 2.1
Oil category 3
Oil category 3.1
Tab. 37: KD lubricating oil categories
Lubricating oil additives
Kohler prohibit the use of lubricating oil additives in the KD diesel engines.
5.13.4 Approved coolants
Coolant function
Diesel engine coolant fulfills three functions:
– Heat transfer from the diesel engine and its components to the radiators, without fluid cavi‐
tation
– Corrosion protection and deposit prevention in the cooling system
– Antifreeze protection in the cooling system
Information
Corrosion inhibitors present no cavitation protection. Use of water and corrosion inhibitor only
in the cooling system is not recommended.
Coolant specification
Kohler KD diesel engines are designed to operate with either SI, SI-OAT or hybrid technology
with ethylene glycol basis products as coolant.
The user can choose a ready-to-use preparation or prepare their own blend of water with anti‐
freeze and corrosion-protection agents. Kohler recommends the use of ready-to-use mixture as
it reduces the risk of error in concentration and pollution of the system.
146
Oil standard
ACEA E4
ACEA E7
API CI-4 Plus
DHD-1
JASO DH-1
ACEA E6
ACEA E9
API CJ-4
JASO DH-2
ACEA E4-16
Both ACEA E4 and
ACEA E7
ACEA E6-12
Both ACEA E6 and
ACEA E9
API CK-4
© 2022 by Kohler Co. All rights reserved.
Type of Lubricant
Synthetic
(Group 2 and/or 3 base
oils)
Synthetic
(Group 2 and/or 3 base
oils)
Synthetic
(Group 3 and/or 4 base
oils)
VI > 155
Long live additive
Synthetic
(Group 3 and/or 4 base
oils)
VI > 155
Long live additive
KD103V20 33521030901_2_1 EN_US
Oil cate‐
Compat‐
gory
ible with
factor
EATS
1
No
1
OK
2
No
2
OK
2022-09
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