F i g u r e 11B-40. Cam Followers and
Guides
5. Pull the push rod and spring assembly
Figure 11B-39. Removing Push Rod
from the bottom of the cylinder head.
from Upper Side of Cylinder Head
6. Remove the push rod lock nut, spring
6. Unscrew the lock nut to release the
and spring seats from the push rod.
spring. Then remove the nut, flat
washer and tool from the push rod.
If the cylinder head is to be replaced,
remove the spring retainers and install
7. Pull the push rod, spring, spring
t h e m in the new head.
seats and cam follower out of the cylin-
der head.
Inspection
R e m o v e Cam Follower and Push Rod
( C y l i n d e r Head Removed)
Proper inspection and service of the cam
follower is necessary to obtain continued
When removing the cam followers and as-
efficient engine performance. When any
sociated parts, tag them so they may be
appreciable change in injector timing or
reinstalled in their original locations.
exhaust valve clearance occurs during
engine operation, remove the cam follow-
1. Rest the cylinder head on its side
ers and their related parts and inspect
(Figure 11B-40) and remove the cam fol-
them for excessive wear. This change in
lower guide.
injector timing or valve clearance can
usually be detected by excessive noise at
2. Remove the cam follower out of the
i d l e speed.
cylinder head.
Wash the cam followers with lubricating
3. Remove the fuel pipes from the injec-
oil or Cindol 1705 and wipe dry. Do not
tors and the fuel connectors.
use fuel oil. Fuel oil working its way in
between the cam roller bushing and pin
NOTE
may cause scoring on initial start up of
the engine since fuel oil does not provide
Immediately after removing the fuel
adequate lubrication. The push rods,
pipes, cover the injector inlet and
springs and spring seats may be washed
outlet openings with shipping caps
with clean fuel oil and dried with com-
to prevent dirt or foreign material
pressed air.
from entering.
Examine the cam follower rollers for scor-
ing, pitting or flat spots. the roller
4. Loosen the push rod lock nut and un-
must turn freely on their pins. Measure
screw the push rod from the rocker arm
clevis.
11B-28
