Perkins 4.99 - Valve Removal and Replacement; Valve Removal Procedure

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10. Remove the eight push rods and place somewhere
safe (possibly in the cylinder head cover) to
avoid the
possibility of any being accidentally bent.
11.
Unscrew the small banjo bolts on the tops of the
atomisers and remove the leak-off pipe by unscrew-
ing
the union on top of the fuel filter.
12. Remove
the low pressure fuel pipes between the
fuel
filter and the fuel pump, remove the fuel filter
after disconnecting the feed pipe from the lift
pump, blank off all pipes and ports to prevent
ingress
of foreign particles.
13. Remove the
four high pressure fuel pipes from the
fuel
pump to the atomisers. Blank off fuel pump
outlet ports.
14. Remove the
atomiser securing nuts and carefully
remove the atomisers. (Refer to Fig. EA).
Blank off the exposed ports on the atomisers.
15.
Uncouple the dynamo or alternator adjusting link.
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CYLINDER HEAD-E.3
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16. Remove the cylinder head securing nuts and lift
off the cylinder head complete with the inlet and
exhaust manifolds. (Refer to Fig. E.5).
NOTE: On 4.99 and 4.107 engines, to prevent liner
movement should the engine be turned with the
cylinder head removed, it is suggested that the liners
are held in position by suitable tubing placed over two
of the cylinder head studs and locked with nuts and
washers.
To Remove the Valves
With earlier engines, the valves were numbered and the
cylinder head was marked with corresponding numbers
(see fig. E.6).
With current engines, the valves and seats are not
numbered and where a valve is to be used again, it
should be suitably identified to ensure it is replaced in
its
original position.
1. Remove collets by compressing the valve springs
as shown in Fig. E.7.
2. Remove the spring caps, springs, seals (where
fitted) and spring seats. Remove valves.
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