Derate Tables
4000 Series 4012-46
Diesel Engines TAG1A, TAG2A, TAG3A
non-emissions compliant
4012-46TAG1A 1800 rev/min
Derate for high intake Temp. and/or elevated altitude from ISO 3046 standard conditions. Applies to tropical and temperate builds where
applicable.
20
18
16
14
12
Note : No derate required below 50°C and 2400 m asl.
Derate %
10
2
50°C
0
0 500 1000 1500 2000 2500
Altitude m asl
Note: Ambient temperature at air cleaner inlet.
4012-46TAG2A 1800 rev/min
Derate for high intake Temp. and/or elevated altitude from ISO 3046 standard conditions. Applies to tropical and temperate builds where
applicable.
20
18
16
14
12
Derate %
10 50°C
45°C
6
4 40°C
2
35°C
0
0 500 1000 1500 2000 2500
Altitude m asl
Note: Ambient temperature at air cleaner inlet.
4012-46TAG3A 1800 rev/min
Derate for high intake Temp. and/or elevated altitude from ISO 3046 standard conditions. Applies to tropical and temperate builds where
applicable.
50°C
20
18
45°C
16
40°C
14
35°C
12
30°C
Derate %
10
25°C
8
0
0 500 1000 1500 2000 2500
Altitude m asl.
Note: Ambient temperature at air cleaner inlet.
4000 Series 4012-46
Publication No. TPD1692E, issue 1. Printed in England. © Perkins Engines Company Limited
Distributed by
Perkins Engines Company Limited
Peterborough PE1 5NA United Kingdom
Telephone +44 (0) 1733 583000
Fax +44 (0) 1733 582240
www.perkins.com
All information in the document is substantially correct at the time
of printing but may be subsequently altered by the company.
