TM 5-4610-218-12
Section VII. MAINTENANCE OF CHEMICAL FEED EQUIPMENT
duces the speed so that the pumps operate approxi-
WARNING
mately 12 strokes per minute. The length of the
pump is adjustable to provide a feed of 1/2 to 2-1/2
Dry cleaning solvent, P-D-680, used to
gallons per hours. The adjustment can be made
clean parts, is potentially dangerous.
without stopping the pump. The rate of feed for
Avoid repeated and prolonged
each pump can be controlled individually.
breathing of the vapors and skin con-
tact with the liquid. Do not use near
open flame or excessive heat. Use in a
chemical solution feeder and diaphragm pumps.
well-ventilated area The flash-point
of P-D-680 is 100-138 F (38-59 C).
semble the diaphragm pumps.
d. Clean, Inspect and Repair.
4-20. Chemical Solution Feeder Assembly.
(1) Clean all foreign matter from the com-
a. Description. The chemical solution feeder as-
ponents. A white coating on any part is an indi-
sembly consists of two diaphragm pumps with nec-
cation of mineral deposits. Remove by wiping or
essary hose. They are operated by one electric motor
soaking the part in muriatic acid (a 5% hydrochloric
through a gear reduction mechanism which trans-
acid solution) or dry cleaning solvent P-D-680.
mits the power to a reciprocating mechanism and
priming levers. The gear reduction mechanism re-
Figure 4-10. Chemical Solution Feeder, Removal and Installation.
4-54
