um Unverferth 2750, Operator'S Manual And Parts Catalog, Page: 40 / 112

2-12
Service
TROUBLE SHOOTING
PROBABLE CAUSE CORRECTION
UNDERCARRIAGE SWAYING, TIRE WEAR, LIGHTS
Unit sways during travel Check tire pressure
Check tongue and steering hardware, tighten ap-
propriately
Tires show excessive wear Check tire pressure
Wheel makes grinding or squeaking noise Service wheel bearings
Tail lights are not functioning Check wires and connections
Replace lamps
CONVEYOR WILL NOT TURN OVER OR DEVELOP PROPER
SPEED OR TORQUE
Pump does not deliver suffi cient pressure or
volume
Check output and delivery, change if necessary.
See “Adjusting Hydraulic Pressure Relief Valve”
in Operations Section of this manual.
Conveyor jammed Shut-off and lock-out power, open clean-out door
and remove excess material (make sure swivel
spout is clear)
CONVEYOR RUNS TOO SLOW
Engine running too slow Increase engine speed
Pump not producing minimum required fl ow and
pressure Check pump fl ow and pressure and correct
Pump is worn Repair or replace pump
Internal leak in controls or motor Replace seals; repair or replace valves or mo-
tor
Air in system Bleed system and tighten connections
Improper hydraulic oil viscosity If conveyor starts slowly and speed increases
after oil heats up, oil is too heavy weight. If
conveyor slows down after oil heats up, oil is
too light weight
OIL HEATS EXCESSIVELY
Oil viscosity incorrect Drain and refi ll with proper weight oil
Dirty oil Drain, fl ush, and refi ll with a clean oil and fi lter
Oil level too low Fill to proper level
Oil slipping through worn pump Repair or replace pump
Restricted line or piping Reroute lines to eliminate restrictions
Reservoir too small to provide adequate cooling Replace with larger reservoir or install oil cooler