Gear Pump Flow Efficiency Test - New Holland LS140 Workshop Manual

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GEAR PUMP FLOW EFFICIENCY TEST

Fittings and gauges required:

1. Hydraulic flow tester - 115 l/min (30 GPM) capac-

2. Male and female 1/2" quick couplers for units

equipped with auxiliary boom hydraulics.

3. Two male 3/4" UNF 37 flare to tester fittings for

units without auxiliary boom hydraulics.

Test Procedure

Gear pump flow test with units equipped with auxilia-

ry boom hydraulics.

1. Lower the boom and bucket to the lowered posi-

tion, resting on the ground.

2. Stop engine, turn ignition key to the run position

and operate the boom and bucket control pedals

to relieve pressure in the cylinders. Turn off the

3. Attach the pressure (inlet) hose from the flow

tester with the female quick coupler to the male

half on the loader at 1.

4. Attach the return (outlet) hose from the flow test-

er with the male coupler to the female half on the

loader at 2.

IMPORTANT: Make sure the flow tester is connected

into the hydraulic system properly for proper oil flow

through the tester to prevent damage to the hydraulic

test equipment or hydraulic system.

Never position tester between the gear pump and

control valve as the system relief valve will be out

of the test circuit, and pump over pressure may

cause a pump failure by splitting the center sec-

tion or twisting off the input shaft.

SECTION 35 - HYDRAULIC SYSTEM

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