TM 5-5420-203-14
3-6. TROUBLESHOOTING.
SYMPTOM INDEX
1.
Hydraulic fluid under pressure is observed
Bridge will not lift from bridge seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..... 3-4
2.
q
Bridge reacts rapidly to controls (jerks, jumps) . . . . . . . . . . . . . . . . . . . . . ..3-4
3.
Bridge reacts slowly to controls
4.
Bridge reacts well to controls, then fails to move . . . . . . . . . . . . . . . . . . ...3-4
5.
Bridge lifts from bridge seat slowly or stops . . . . . . ..... . . . . . ..... 3-5
6.
q
q
Bridge is slow to raise to vertical position . . . . . . . . . .
7.
., . . . . . . . . . . . . . . .
Bridge raises to vertical position, then stops
8.
.
00
.
.
00
.0000... q
...........
Bridge begins to lower, then stops ........,. . . . . . . . . . . . . . . . ....... 3-6
9.
q
i
Br dge will not fully extend flat prior to laying . . . . . . . . . . . . . . . . . . . . . ...3-6
10.
Bridge assumes an unusual position during launch/retrieval . . . . . . ...3-6
11.
1.
Hydraulic fluid under pressure is observed
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
6
*..
Bridge reacts rapidly to controls (jerks, jumps) . . . . . . . . . . . . . . . . . . . . ...3-4
3.
Bridge reacts slowly to controls . . . . . . . ....
4.
. . . . . . . . . . . . . . . . ...0.... . ...0
Bridge assumes an unusual position during launch/retrieval . . . . . . . ..3-6
11.
Bridge will not lift from launched position
12.
.
..0.....00.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
..-
Bridge raises from ground, but stops
13.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .0 . ...0
Bridge will not raise to full vertical position . . . . ....... . . . . ....... . . 3-7
14.
q
Bridge will not lower to bridge seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
15.
Table 3-1. Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. HYDRAULIC FLUID UNDER PRESSURE IS OBSERVED.
Step 1. Check hydraulic connections at leak.
Tighten loose connections.
Step 2. Check hydraulic quick-disconnects.
Reconnect hydraulic quick-disconnects.
Step 3. Check threads of hoses and lines at leak.
Replace defective component if threads, etc. are
damaged.
3-3
