TM-5-3805-254-14-P-2
TRUCK, DUMP, 20 TON, 6X4, ON-OFF HIGHWAY 71,000 GVW, IHC MODEL F-5070 (CCE)
TECHNICAL MANUAL; OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, GENERAL SUPPORT AND DEPT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS INFORMATION AND SUPPLEMENTAL MAINTENANCE INSTRUCTIONS)
JUNE 1980
TM-5-3805-254-14-P-2 - Page 473 of 894
TRUCK SERVICE MANUAL
FUEL SYSTEM
3. Drain sediment from air inlet trap daily or weekly
as
required
depending
upon
amount
of
contamination in air lines.
A yellow indicator will appear in upper bulb when
sintered filter becomes clogged with foreign
matter. The filter must then be removed and
cleaned with solvent.
4. Do not obstruct flow meter vent in any way.
Oil
and oil mist must never be allowed to enter
either the drain of inlet of flow meter as this will
cause float to stick to the sides of tube.
5. Do not readjust or move injector plate supports
on rods.
These have been adjusted at the factory for proper
alignment and must not be disturbed.
6. Maintain air cylinder oiler at 1/2 to 1/3 full of
injector test oil at all times to insure proper
cylinder action.
7. All fittings, filter oiler and bubble-checker bowls
(upper and lower) must be kept tight and free
from air leaks.
8. Any oil that collects in bowl of separator mounted
by dry type filter must be drained regularly.
This
separator also contains a sintered filter which
must be cleaned in solvent at least twice yearly
according to all available data.
9. All available data indicates that dry type filter
element should be changed twice yearly under
normal conditions if sediment bowl adjacent is
drained regularly.
Cup Spray Pattern Check
Injector Spray Pattern - ST-668
Two models of ST668 are being used to check cup spray
patterns, the first was released in 1960 and contains
black-oxide plated seat and seat spacers; the current
tool contains "bright" cadium plated seat and seat
spacers.
The latter unit can be used with all Cummins
injectors, while the earlier model cannot be used with 2
degree spray angle injector cups.
To check L series
injector cups with the latest tool, use ST849 cup seat or
black seat from original ST668 tool.
If you have ST668 with black oxide finish seat and
spacer, it may be brought up to date by purchasing
ST668, Details 36, 2, 1, 17, 18, 19, 20, 22, 23, 24, 25, 4,
37 and 3 from your nearest Cummins Distributor.
The
following
instructions
are
written
with
the
understanding that all ST668 Spray Test Fixtures have
been brought uptodate.
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