Replace worn cam follower sockets (21) by pressing out the old socket. Press in a new socket being sure
that the socket seats in the bore of the cam follower (12 or 13).
Inspect the cover (7) for cracks, warping, or damaged gasket surface. Remove slight warping or
imperfections using a flat mill file. Replace the cover if it is cracked.
Cummins Engine has obsolete this special tool ST-1283 without replacement.
Install the rollers (18 or 20) in the cam follower (12 or 13) using an arbor press and roller pin block ST-1283
as follows: (a) Position the cam follower (12 or 13), rollers (18 or 20), and pin (17 or 19) in ST-1 283 under
the ram of the press.
Carefully align the roll pin hole and lubrication hole of the pin (17 or 19) with the holes in the follower
(12 or 13).
Insert a 0.010 inch (0.26 mm) feeler gage between the follower (12 or 13) and roller (18 or 20) as
shown in Figure 9-14. Do not allow the feeler gage to extend over the shaft hole in the follower.
Being careful to align the roller (18 or 20) with the pin, press the pin (17 or 19, Figure 9-13) into the
follower (12 or 13) until the roll pin hole is aligned with the hole in the follower.
Remove the feeler gage and check the side clearance. The side clearance shall be 0.009 to 0.024
inch (0.23 to 0.61 mm).
Install the roll pin (16) through the follower (12 or 13) and pin (17 or 19).
Install new cup plugs (15) in the cam follower shafts (14) using a 0.125 inch (3.18 mm) pin punch and arbor
When assembling the followers (12 and 13) to the shaft (14), be sure that the elongated
capscrew hole In the shaft will face the front of the engine when Installed. The elongated hole
allows passage of lubricating oil. Severe damage will result from running the engine with an
Improperly Installed shaft.
Using new retaining rings (11), assemble the followers (12 and 13) to the shaft (1 4), observing the match-
mark made before disassembly.
Check the capscrews (3, 4, and 9) for stripped or damaged threads. Replace damaged or stripped
Inspect the slot in each capscrew (9) for distortion due to overtightening. Replace the capscrews if the
slots are distorted.
If removed, install bushings (10, Figure 9-13) in the cylinder block.
Be sure the elongated capscrew hole In the shaft (14) faces the front of engine when the shaft
Is Installed. The elongated hole allows passage of lubricating oil. Severe damage will result
from running the engine with an Improperly Installed shaft.
Observing the match-marks made during removal (the elongated hole in the shaft (14) must face the front
of the engine), position the follower assembly on the bushings (10).
Using flat washers (6), install capscrews (9), and tighten to 29 to 31 pound-feet (39 to 42 newton-meters).
Observing the match-marks, install the push rods (1 and 2) taking care that the ball-end of the push rods
are properly seated in the sockets (21).
Install the rocker arms in accordance with paragraph 9-10.
Using a new gasket (8), position the follower cover (7) to the cylinder block, and install flat washers (6),
lockwashers (5), and capscrews (3 and 4). Cross-tighten the capscrews to a final torque of 30 to 35 pound-
feet (41 to 47 newton-meters).