SKF FlowMaster II Guía De Usuario Y Mantenimiento página 14

Troubleshooting
Condition
Pump does not operate
Pump runs excessively
Pump speeds up or runs erratically
Pump runs, but output is low
Lubricant leaking from safety unloader valve
Lubricant leaking from weep hole in vent valve
Possible cause
No hydraulic power to pump
No pressure on gauge:
• Closed supply line shut off valve
• No power to solenoid valve
• Faulty solenoid
• Pressure reducing valve is set too low
• Insufficient hydraulic fluid supply
Pressure is shown on gauge on pump manifold:
• Closed fluid outlet line
• Flow control valve is fully closed
• Pump is stalled due to grease back pressure
Pump is seized or damaged
Pump tube malfunction
Outlet check damage or contamination
Vent valve damage or contamination
System component leaking
Vent valve not receiving proper pressure
to keep closed
Injector bypassing
Low level of grease or reservoir is empty
Follower plate is stuck and separated
from grease
Pump piston or checks are worn
Insufficient hydraulic fluid supply
Inlet pressure too low
Faulty inlet or discharge check valve in pump
Pressure of system set too high
Safety unloader damaged or contaminated
Vent valve lubricant seal damaged
14
Corrective action
Turn on or connect hydraulic supply to pump
Open shut-off valve
Correct electrical fault
Replace solenoid
Reset pressure reducing valve
Check hydraulic supply for proper pressure
and flow
Check outlet line and clear obstructions
Readjust flow control valve to 1 / turn open
4
Check vent valve in system
Dismantle pump and repair defective or seized
component Refer to manual 404554
Refer to manual 404554
Repair check or remove contamination
Repair vent valve or remove contamination
Repair leaks
Orifice fitting plugged
Repair injectors
Refill reservoir
Check follower plate and container for damage
Refer to manual 404554
Check hydraulic supply and adjust flow
Increase pressure at pressure control valve
Replace faulty components Refer to manual
404554
Adjust pressure switch setting
Replace safety unloader
Replace lubricant seal