New Holland LS140 Workshop Manual page 287

Electronic instrument cluster (EIC) hydraulic oil filter light:
Pretest instructions:
* Hydraulic oil reservoir oil at proper oil level
* Operator in seat
* Service/Run switch in "RUN" position
* Seat belt fastened
* Ignition switch in the "ON" position
* Engine running half throttle, 1500 RPM
STEP TEST
1 Electronic instrument cluster
(EIC)
Hydraulic oil filter light should
be off.
2
Boom operation:
Pretest instructions:
* Operator in seat
* Service/Run switch in "RUN" position
* Seat belt fastened
* Ignition switch in the "ON" position
* Engine running half throttle, 1500 RPM
STEP TEST
1 Boom movement
Boom should move freely
through full range when the
foot or hand controls are
moved.
2
3
4
5 Boom movement
Boom should raise smoothly
without jerking.
SECTION 35 - HYDRAULIC SYSTEM
RESULT PROBABLE CAUSE AND CORRECTION
YES System OK
NO Replace oil filter, if problem still exists go to next
step.
Check filter sender and wires.
RESULT PROBABLE CAUSE AND CORRECTION
YES System OK
NO Check for binding in boom linkage, if OK go to next
step.
Check for bent cylinders, if OK go to next step.
Check hydraulic system oil flow and pressure, if OK
go to next step.
Check cylinders for internal damage.
YES System OK
NO Check for air in the hydraulic system. Check, tighten,
or replace suction line and fittings.
Check for air leak in hydrostatic pump case drain line
from the hydrostatic pumps to the suction side of
gear pump.
35-18
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