TM 1-1730-232-13&P
Table 3-2. TROUBLESHOOTING PROCEDURES (cont)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3.
PUMP DOES NOT REACH FULL PRESSURE (cont)
Step 2. Check if relief valve is set too low.
Test pump. Refer to Chapter 4, AVIM.
If test fails, replace pump. Refer to para. 3-15.4.
Step 3. Check for oil leaking past unloading valve piston.
Replace o-ring on valve unloading piston. Refer to Chapter 4, AVIM.
4.
PUMP HANDLE RISES AFTER EACH STROKE
Step 1. Check for oil leaking past outlet ball seats.
Check for dirt, replace ball and/or reseat valve. Refer to Chapter 4, AVIM.
5.
PUMP HANDLE CAN BE PUSHED DOWN (SLOWLY) WITHOUT RAISING THE LOAD
Step 1 Check rf inlet ball is not seating
Check for dirt, replace ball and/or reseat valve. Refer to Chapter 4, AVIM.
Step 2. Check for damaged piston assembly.
Replace piston assembly. Refer to Chapter 4, AVIM.
Step 3. Check for scored cylinder wall or pump body.
Replace pump body and assembly. Refer to Chapter 4, AVIM.
6.
PUMP HANDLE OPERATES WITH SPONGY ACTION.
Step 1. Check for air trapped in the system.
Bleed hydraulic system.
Step 2. Check for too much oil in reservoir.
Check oil level and drain oil as necessary.
3-12
