TM
55-1730-229-34
AG
320A0-MME-000
TO
35C2-3-473-2
TM
1730-34/1
Direct/General Support Troubleshooting (continued)
Table 2-2.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
PUMP EMITS HIGH PITCH WHINE AFTER HYDRAULIC MODULE OUTPUT TURNED ON (continued)
32.
Replace module RETURN QD check valve (5, figure 8-19) or return line
Step 2.
a.
Remove RETURN QD fitting and return line check valve.
Clean manifold hole where check valve fits.
b.
c. Install a new QD fitting and return line check valve with new
packing.
Step 3.
UNABLE TO PERFORM HOSE FLUID WARMUP AND HOSE AIR BLEED PROCEDURES.
33.
Repair dual manifold according to the procedures of paragraph
34.
AGPU DOES NOT DRIVE WHEN SPEED/DIRECTION CONTROL ASSEMBLY HANDGRIPS ROTATED IN
EITHER DIRECTION (CONDITIONS PROPER FOR OPERATION).
Step 1.
Check if control panel DRIVE light is on when handgrips are rotated.
a. If DRIVE light is lit, continue with step 2.
If DRIVE light is not lit , refer to TM 55-1730-229-12, table
b.
4-2, malfunction 71.
NOTE
Make sure battery voltage is up before performing drive motor
test. Observe DC AMPS meter while performing test. If meter
indication exceeds 300 amps after initial surge, set DRIVE
switch off.
Operate AGPU in alternate (battery) propulsion mode (see
Step 1.1.
click from electric brake. If there is no audible click:
a. Check diode CR16 for correct operation and installation.
Replace as required.
2-18
Change 2