TM 9-2350-256-34-1
(b) Start the auxiliary engine and allow a
hydraulic load on the auxiliary pump of 2000 ± 50
three-minute warmup period with no load on the
psi. If necessary, adjust the system selector valve
generator or pump. Then check the engine speed
relief valve with the adjusting screw (view A, fig. 2-
with a hand tachometer or stroboscope. Adjust to
29) to obtain a pressure reading of 2000 ± 50 psi.
2000 ± 100 rpm, if necessary, in the following
Check engine rpm for 2000 ± 100 rpm. If engine rpm
manner.
is below 2000 ± 100, troubleshoot.
1 Locate the governor speed adjustment
screw on the front of theengine (3, fig. 4-1).
2 Loosen locknut and turn screw slowly
until tachometer or stroboscope reads 2000 ± 100
rpm.
(f) Continue to operate the auxiliary engine
for 10 minutes with a 2000 ± 50 psi load on the
a u x i l i a r y h y d r a u l i c p u m p a n d n o l o a d o n t h e
generator.
3 Carefully tighten locknut so that the
tachometer or stroboscope reading does not change.
(c) Stop engine, check crankcase oil and fill
to proper level (TM 9-2350-256-10) if required.
(d) Install a pressure gage in the gage port
of the system selector valve relief valve, place the
manual shutoff valve in NORMAL OPERATION
position and place the system selector valve in
AUXILIARY position.
(g) Check all points for leakage (TM 9-2350-
256-20) and correct any other defects. Return system
selector valve to MAIN position and shut off engine.
( h ) C a l i b r a t e t h e c u r r e n t l i m i t e r a s p e r
paragraph 3-47. With the load applied as stated in
step (i) of paragraph 3-47f(3), verify that the engine
speed remains within 2000 ± 100 rpm. If not,
readjust the governor speed control. If the engine
cannot maintain 2000 ± 100 rpm under generator
load, troubleshoot.
(e) Check the pressure gage to confirm a
S e c t i o n I I . D e l e t e d
S e c t i o n I I I . D e l e t e d
Change 8
4-21 (4-22 Thru 4-28 Deleted)
