TM 5-3810-300-24&P-3
1.2.1. Valve Operating Mechanism
Fig. 10 - Installation of Cam Followers
with a screen insert. The screen will prevent the cam
followers from touching the bottom of the pail and avoid
Fig. 9 - Valve and Injector Operating Mechanism and
Install used cam followers and push rods in their original
Relative Location of Parts
locations. Refer to Fig. 9 and proceed as follows:
check the side clearance (Fig. 5). The clearance must
CYLINDER HEAD ON ENGINE:
be .015" to .023".
1. Note the oil hole in the bottom of the cam follower.
With the oil hole directed away from the exhaust valves
(Fig. 10), slide the cam follower in position in the
Install Cam Follower and Push Rod
cylinder head.
If new cam follower assemblies are to be installed,
2. Assemble the serrated lower spring seat (Fig. 6),
spring and upper spring seat on the push rod.
and wipe dry. Do not usefuel oil.
3. Place a flat washer over the upper spring seat and
Before cam followers are installed, immerse them in
start the lock nut on the push rod. Place tool J 3092-01
clean Cindol 1705 (heated to 100-125F or 38-52-C) for
on the push rod between the washer and the upper
at least one hour to ensure initial lubrication of the am
spring seat and place the push rod assembly in- the cam
roller pins and bushings. Rotate the cam rollers during
follower. Then thread the lock nut on the push rod until
the soaking period to purge any air from the bushing-
the spring is compressed sufficiently to permit the spring
roller area. The heated Cindol oil results in better
retainer to be installed. Install the retainer with the tangs
penetration as it is less viscous than engine oil and flows
facing the notch in the cylinder head.
more easily between the cam roller bushing and pin.
After the cam followers are removed from the heated
4. Remove the nut, flat washer and tool. Then
Cindol 1705, the cooling action of any air trapped in the
reinstall the lock nut and thread it as far as possible on
bushing and pin area will tend to pull the lubricant into
the push rod.
the cavity.
CYLINDER HEAD REMOVED FROM ENGINE:
Refer to Fig. 9 and install the cam follower and pushrod
NOTE: Heat the Cindol 1705 in a small pail
as follows:
Page 46