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Page Title:
Table 4-1. Preliminary Performance Checks |
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 TM 55-4920-405-13&P
Table 4-1.
P r e l i m i n a r y Performance Checks
I
Normal
Abnormal
Indication
Corrective Action
Indication
Test stand cannot
Inspect, test, adjust, or
Wheels will not lock,
1
Set parking brake.
a.
roll.
replace, as necessary.
continue to roll freely.
b.
Inspect, test, and replace,
Probable cause:
as necessary.
a.
Faulty handbrake
c.
Inspect, test, and replace,
assembly.
as necessary.
b.
Faulty brake rod.
c.
Faulty brake shoe on
rear wheels.
Doors open freely
Doors cannot be opened
a. Inspect. test, and replace,
2
Open access doors.
or cannot be locked open
and can be locked
as necessary.
in open position.
b. Replace as necessary.
because of:
c. Replace as necessary.
Faulty latches.
a.
b . Faulty hinges.
c. Faulty locking bars.
PRESSURE COMPEN-
PRESSURE COM-
Replace or repair as necessary.
Turn PRESSURE
3
SATOR binds or cannot
PENSATOR oper-
COMPENSATOR
ates freely.
be turned because it is
(16, figure 2-1)
defective.
fully CCW to open.
Replace or repair as necessary.
COMPENSATOR
COMPENSATOR SHUT-
4
Turn COMPENSA-
OFF VALVE binds or
SHUTOFF VALVE
TOR SHUTOFF
operates freely.
cannot be turned be-
VALVE (17, figure
cause it is defective.
open.
5
Turn FLOW CON-
FLOW CONTROL
F LOW CONTROL
Replace or repair as necessary.
TROL VALVE (12,
VALVE operates
VALVE binds or cannot
freely.
be turned because it is
figure 2-1) fully
defective.
CW to close.
Turn HlGH PRESS
6
Replace or repair as necessary.
HIGH PRESS RE-
HIGH PRESS RELIEF
LIE F VALVE
VALVE binds or cannot
RELIEF VALVE
.
operates freely.
be turned because it is
(14, figure 2-1)
fully CCW to open.
defective.
FLUID PRESS GAGE
FLUID PRESS
Replace or repair as necessary.
7
Turn FLUID PRESS
SHUTOFF VALVE binds
GAGE SHUTOFF
GAGE SHUTOFF
or cannot be turned be-
VALVE operates
VALVE (22, figure
cause it is defective.
freely.
open.
Replace or repair as necessary.
HIGH PRESS BYPASS
8
Set HIGH PRESS
HIGH PRESS BY-
PASS VALVE con-
VALVE control binds
BYPASS VALVE
or cannot be turned be-
control (19, fig-
trol operates
ure 2-1) to open.
freely.
cause valve is defective.
q
Replace or repair as necessary.
Set SUCTION
SUCTION PRES-
SUCTION PRESSURE
PRESSURE
SURE FILTER-
F I L T E R - O U T control
binds or cannot be turned
FILTER-OUT con-
OUT control
because valve is
operates freely.
trol (21, figure
defective.
its positions, ending
a t FILTER-OUT.
Replace or repair as necessary.
10
Turn VOLUME con-
VOLUME control
VOLUME control binds
or cannot be turned be-
trol (14, figure 2-1)
turns freely.
cause of defective con-
fully CCW to zero
trol or pump.
flow.
4-2
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