Figure 4-2. Typical Oil Pump Test Setup.

TM 9-2815-210-34-2-2

A d j u s t m e n t and Test.

(1) Pressure relief valve adjustment.

NOTE

O i l pump has two halves. Front half of pump

b e h i n d drive shaft is called pressure pump.

P r e s s u r e pump pumps oil from deep sump of

engine oil pan to engine main oil gallery.

R e a r half of pump is called scavenge pump.

Scavenge pump pumps oil from shallow sump

in engine oil pan to deep sump in engine oil

pan.

( a ) Pour some engine lubricating oil into scavenge pump so scavenge

p u m p impellers will not be damaged during test.

( b ) Hook oil pump to test bench as shown in figure 4-2. Join oil inlet

h o s e and oil outlet hose to pressure half of pump. Check that you can see pressure

r e l i e f valve hole in pump.

Typical Oil Pump Test Setup.

Set drive unit to

turn pump at 1,000 to 2,000 rpm.