TM 5-3805-280-24-1
Tests
2. Remove plug (A) from tube between turbocharger and
intake manifold.
3. Install fitting, hose, and pressure gauge.
4. Warm engine to normal operating temperature.
5. Turn engine rpm dial to fast idle.
Engine Fast Idle--Specification
9010
Speed .................................................... 2180 25 rpm in standard mode
25
8
6. Check combined pump engine pulldown using arm in
A--Plug
function over relief.
Combined Pump Engine Pulldown--Specification
Speed .................................................... 100 rpm approximate with arm in
over relief
If combined pump engine pulldown is not approximately
100 rpm, turn the load adjusting cartridge on the pump
regulators in equal amounts to obtain 100 rpm combined
pump engine pulldown. (See Hydraulic Pump Regulator
Test and Adjustment--Engine Pulldown in Group
9025-25.)Be sure to turn the load adjusting cartridges out
to their original setting at the end of test.
7. Push the HP mode switch on. The HP mode indicator
on.
HP Mode Switch--Specification
Position .................................................................................................. On
NOTE: HP mode is actuated so the injection pump lever
is pushed against the fast idle stop on the
injection pump as the hydraulic pressure
increases. With the injection pump lever against
the fast idle stop, the maximum amount of fuel is
delivered to the engine.
8. Watch the engine speed and pressure.
9. Slowly actuate arm in function over relief to load the
engine pulling the speed down below rated engine
speed. Repeat this step at least six times.
Continued on next page
CED,TX08227,3197
1912AUG982/4
3-59
