TM-5-3895-372-20
CONCRETE-MOBILE MIXER BODY M919, MODEL 8CM-24/F
TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE MANUAL
AUGUST 1980
TM-5-3895-372-20 - Page 196 of 694
TM 5-3895-372-20
Section II
TROUBLESHOOTING
6-5.
INTRODUCTION.
Troubleshooting procedures for the wet admix systems are given in table 6-1.
It is arranged by malfunctions, in the
following order:
a.
Air pressure cannot be maintained at 15 psi (Malfunction No.
1).
b.
Liquid admix flows unevenly (Malfunction No.
2).
c.
Liquid admix flows too quickly (Malfunction No.
3).
d.
Liquid admix flows too slowly or not at all (Malfunction No.
4).
e.
Quick opening valve sticks (Malfunction No.
5).
f.
Flowmeter does not return to zero (Malfunction No.
6).
g.
Dry admix system inoperative (Malfunction No.
7).
If only one liquid admix system malfunctions, apply the troubleshooting steps to that system only.
If both systems
malfunction, troubleshoot both of them.
You will find that most malfunctions are caused by a gelatinous or gummy sediment from the admixtures themselves.
Remove sediment with the cleaning agent recommended by the admixture manufacturer.
Remind the operator:
a.
Never mix admixtures in tanks.
b.
Always flush and drain each system after use.
6-2
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