CHAPTER 2. OPERATING INSTRUCTIONS - TM-5-4320-251-140011

CHAPTER 2

O P E R A T I N G INSTRUCTIONS

Section I. SERVICE UPON R E C E I P T O F M A T E R I E L

(.8) Tighten any loose hardware. Report any

2-1.

Assembling, Inspection, and Servicing

o t h e r dam age to the required authority.

the

Equipment

c. S e r v i c i n g . Service the equipment as follows:

a . Assembly. N e w p u m p s a r e s h i p p e d f r o m t h e

(1) Service the engine as directed in TM 5-

factory with the diaphragm removed. Notify

2805-257-14.

organizational maintenance personnel for in-

(2) Lubricate the pump as directed in the

s t a l l a t i o n of the separately packed diaphragm.

current L.O.

b. Inspection. I n s p e c t t h e p u m p a s s e m b l y a n d

(3) Perform all the daily preventive main-

hoses as follows:

t e n a n c e checks and services indicated in table 3-1.

(1) Inspect the pump assembly for cracks,

d e n t s , and other damage which may have occurred

2-2.

Installation

during shipment.

Install the reciprocating pump as follows:

(2) Inspect for loose or missing hardware.

a. Locate the pump on a level surface as close to

( 3 ) Check for damaged threads on the suction

the liquid supply as possible.

a n d discharge ports.

b. B l o c k t h e w h e e l s o f t h e p u m p t r a i l e r t o

( 4 ) Using the starting rope, turn the engine

p r e v e n t the pump from shifting during operation.

o v e r with the ignition switch in the OFF position.

c. Connect the female end of the suction hose to

The engine and pump shall turn freely without any

the suction port (3, fig. 2-1 ) on the pump. Use

binding,

scraping, or

other

signs

faulty

t h r e a d sealant on all threaded connections. If more

operation.

t h a n one length of hose is required, add additional

(5)

the

pump

had

been

service

lenghts to the end of the first hose attached to the

p r e v i o u s l y , turn the engine over as directed in (4)

pump.

a b o v e and carefully check the diaphragm for cuts,

Note: Use the shortest possible length of suction hose.

tears, and leaks.

Suction hose exceeding 20 feet will reduce the pump capacity.

(6) Insert a hand into the suction and

Under any circumstances, the suction lift of the pump must not

discharge ports and check for free operation of the

exceed 25 feet. When the suction lift is greater than 5 feet, a 3-

inch suction hose can be used in place of a 4-inch hose without

suction and discharge valves. The valves must

any loss of efficiency. Use a suitable reducer. The 3-inch hose

m o v e freely and seal tightly.

will reduce priming time and will cause less surging during

(7) Inspect the hoses for cuts, collapsed walls,

operation. Make sure the suction hose has rigid walls to

a n d dam aged threads on end fittings.

prevent the hose from collapsing when suction is applied.

2-1