New Holland CX720 Repair Manual page 1693

11. CHECKS, MEASUREMENTS AND REPAIRS ON
THE VALVE SPRINGS, ROCKER ARM SHAFT
AND ROCKER ARMS
Before assembly, the flexibility of the valve springs
needs to be checked with an appropriate tool. Com-
pare the load and elastic deformation data with the
data of the new springs given in the Fig. 13.
NOTE: The bushing is driven in correctly when the refer-
ence C is flush with the bushing seat.
Handle all parts carefully. Do not put your hands or fin-
gers between parts. Always wear suitable safety items
such as fitted clothing, safety goggles, gloves, shoes,
etc. M954
12. F2B Engine — Main data for checking the valve
springs (Dimensions in mm [pounds feet])
1. Load of 454 N +/- 22 (102 lbf. +/- 5 ).
2. Load of 840 N +/- 42 (189 lbf. +/- 9.5 ).
13. F3A Engine – Main data for checking the valve
springs (Dimensions in mm [pounds feet])
1. Load of 500 N +/- 25(112.5 lbf. +/- 5.6).
2. Load of 972 N +/- 25(218.7 lbf. +/- 5.6).
14. Fitting valves and oil seal
Lubricate the stem of the valves and insert them in
their valve guides. Mount the bottom plates (3) with
a key:
- 296176, for engine F2B;
- 296181, for engine F3A.
Fit the oil seal (1) on the valve guide (2) then mount
the valves as follows.
POWER PRODUCTION - ENGINE
CAUTION
2 4/7/2006
B.10.A / 147
12
MID0465A
13
MID0466A
14
MID0467A