Perkins 404C-22T - Engine Stopping; Stopping the Engine Correctly; Emergency Stopping Procedures

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