
3
Workshop Manual, TPD 1458E, issue 3 - Perkins Confidential: Green
25
400 Series
To inspect - valve spring
Operation 3-13
Visually inspect the valve spring for damage.
Use a spring tester to check spring force and free length. Renew the spring if it is outside the service limit.
Engine
Free length (1) mm (in)
Standard
Service limit
All models
35,0 (1.378)
33,5 (1.319)
Engine
Spring rate when compressed to 30,4 mm (1.197 in)
N (lbf) kgf
Standard
Service limit
All models
79 (17.8) 8,1
68,6 (15.4) 7,0
H1046
New
Worn
1
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