Croplands Pinto 2000 - Hydraulic Pump Drive Problems

6.5
Pinto BT-POM 1212 - Revision 5
Section 6
Hydraulic Pump Drive Problems
PROBLEM
A A Low discharge
B Hydraulic system overheating
PROBABLE CAUSE
1 Pump not primed.
2 Air leaks in suction line.
3 Blocked or clogged line fi lter.
4 Impeller plugged.
5 Undersized or collapsed suction hose.
6 Improperly sized hydraulic motor.
7 Bypass adjustment screw not properly set.
8 Eye of impeller rubbing on volute.
1 Improper hydraulic motor size.
2 Bypass adjustment screw set to bypass too
much oil.
3 Improper metering orifi ce installed in pressure
port.
4 Insuffi cient hydraulic hose size.
REMEDY
1 Remove top most vent plug from face of pump
and run pump to expel trapped air.
2 Check and reseal inlet fi ttings.
3 Inspect fi lter & clear any debris from screen.
4 Inspect and clear obstruction.
5 Suction line should be the same diameter as
inlet port of pump or larger.
6 Refer to pump selection guide to determine
proper size.
7 Adjust bypass screw on the side of the
hydraulic motor.
8 Remove volute (front cover) and inspect the
impeller. If wear is detected, sand the impeller
eye O.D. with emery cloth.
1 Refer to pump selection guide to determine
proper size for your system.
2 Close adjustment screw on side of hydraulic
motor to lessen the amount of bypassing oil.
3 Install proper size orifi ce. Refer to Hypro
Manual.
4 Check hydraulic hose size. Hose should be at
least ½”. For large open-centre systems ¾”.