TRUCK SERVICE MANUAL
ENGINE
extension on injector plunger top at No. 3 cylinder, Fig.
Temperature Settings
14-27. Make sure indicator extension is secure in
indicator stem and not against rocker lever,
The following temperature conditions provide the
necessary stabilization of engine components to assure
Note: Cylinder No. 3 for injector setting and cylinder No.
accurate adjustments.
5 for valve setting are selected for illustration purposes
only. Any cylinder combination may be used as a starting
Cold Setting
point, see Table 14-9 and firing order Table 14-10.
Engine must have reached a stabilized temperature (oil
and/or component temperature to be within 10 deg. F of
ambient air temperature).
Note: At rebuild period this setting is obtained through
normal room temperature.
Hot Setting
1. Set injectors and valves immediately after the engine
has reached normal stabilized operating oil temperature.
2. If oil temperature gauge is unavailable, set injectors
Fig. 14-25, (N114220). Valve set timing mark
and valves immediately after engine has operated at
rated speed and load or at high idle for a period of 40
minutes. If slotted thread adjusting screws are used, 20
minutes is sufficient.
Adjustment After Engine Rebuild
During rebuild, adjust injectors and valves using
appropriate values in the "Cold Set" column. The engine
must then run until normal oil operating temperature has
been obtained to allow stability of structural components
as affected by gasket replacements. Recheck injectors
and valves. See Engine Test Procedure, Phase 4,
INJECTOR AND VALVE ADJUSTMENT
DIAL INDICATOR METHOD USING ST-1170
1. If used, pull compression release lever back and block
Fig. 14-26, (N114230). Accessory drive pulley markings
in open position while barring engine, this allows
crankshaft to be rotated without working against
compression.
2. Bar engine until "A" or 1-6 "VS" mark on pulley,
Fig's.14-25 and 14-26, is aligned with pointer on gear
case cover. Remove block from compression release. In
this position, both valve rocker levers for cylinder No. 5
must be free (valves closed). Injector plunger for cylinder
No. 3 must be at top of travel; if not, bar engine 360 deg.,
realign marks with pointer.
3. Turn adjusting screw down on cylinder being adjusted
until plunger contacts cup and advance an additional 15
Fig. 14-27, (N l14231). Dial indicator in place - extension
degrees to squeeze oil from cup. Loosen adjusting screw
contact with plunger
two full turns.
4.
Set up ST-1170 Indicator Support with indicator
407