TRUCK SERVICE MANUAL
ENGINE
3. install push tubes. Injector push tube is largest and
Compression Release Shaft
fits in middle socket.
On engines equipped with
Install new "0" ring over shaft. Insert shaft into cylinder
compression release, exhaust push tube is equipped with
block and secure at rear end of block with copper washer
collar to match with milled lift of compression release.
and lockscrew. Coat expansion plug with sealant, install
On engines without compression release, intake and
plug in counterbore at rear of block, until it seats.
exhaust tubes are identical.
Cam Followers And Push Tubes
Timing The Engine
1. Install cam follower gaskets. It may be necessary to
Use ST-593 to obtain precise timing of push tube travel
add or remove gaskets to obtain correct injection timing.
with piston travel. The travel readings for engine model
2. Position cam follower assembly to block. Torque
must be as listed in Table 14-3. Adjustments to timing
capscrews in sequence as shown in Fig. 14-6 in
are made by altering thickness of cam follower housing
increment of 15 to 20 ft-lbs [2.1 to 2.8 kg m] to 30 to 35
gaskets.
ft-lbs [4.1 to 4.8 kg ml .
1. Position ST-593 Timing Tool in injector sleeve.
Engage rod of push rod indicator in injector push tube
socket. Secure tool in place by tightening knurled hold-
downs evenly by hand. Be sure tool is straight in the
cylinder. Fig.14-7.
Note: Each of the two dial indicators used in timing
engine must have total travel of at least 0.250 inch [6.35
mml .
2. Loosen both indicator supports to prevent damage.
Bar engine crankshaft to bring piston to top center.
Position piston indicator to compress indicator stem to
within 0.010 inch of inner travel stop. Carefully bar
Fig. 146, (N114236). Cam follower torquing sequence
crankshaft to bring piston to exactly top center (1, Fig.
14-8). Zero the indicator dial at this point.
90 DEG. AFTER TOP CENTER
45 DEG. BEFORE TOP CENTER 19 DEG. BEFORE TOP CENTER
TOP CENTER
.
.
"O" Indicator Over Piston.
"O" Indicator Over Rod.
Both Indicators Move In some Direction If Not
Both indicators retate Twice Step 0.032
Bar Engine One Revolution For Proper Position.
(0.2032 Before"O" On Indicator
.
Over Piston
Read Push Rod Indicator.
Fig. 14-7, (FWC-34). Injection timing
396
