Beka-Max EP-1 Hammer Pump w/SEP-8 Control Trouble Shooting Guide

BEKA-MAX SEP-8 Hydraulic Hammer Pump

HKX Proportional Hydraulic System

Trouble Shooting Guide

SEP-8 wire functions:

7 – conductor cable grey in color from SEP-8 computer at base of pump.

Green/yellow wire – ground

Black #1 wire – not used

Black #2 wire – low level signal

Black #3 wire – turns lube pump on

Black #4 wire – not used

Black #5 wire – power to SEP-8 computer

Black #6 wire – not used

Operational Theory:

When the rocker switch is turned to the hammer position power is supplied to the Black #5 wire turning on the SEP-8 computer. When the hammer switch or pedal is turned on the pressure switch in the hydraulic pilot circuit closes supplying power to the Black #3 wire turning on the lube pump. If the lube pump is low on lubricant the low level proximity switch will send a signal to the Black #2 wire opening the n/c relay and breaking the signal from the hammer slide switch or pedal turning off the hammer.

Problem:	Symptom:	Repair:

Hammer quits working	Reservoir empty	Fill reservoir
	Reservoir full, GLI check.	Check for power at Black #2 wire, if there is power with a full reservoir, check the GLI (grease level indicator proximity switch) in the reservoir. If there is power at the signal wire with a full reservoir, GLI is bad and needs to be replaced.
	Reservoir full, SEP-8 computer check.	Check for power at Black #2 wire, if there is power with a full reservoir, check the GLI. If there is no power from the signal wire in the GLI but there is power at the Black #2 wire from the SEP-8 computer, the computer is bad and needs to be replaced.
	Reservoir full, relay check	If there is no power at the Black #2 wire at the relay, check the n/c terminals of the relay. If the n/c terminals have opened, replace the relay.
Lube pump not working.	Hammer operates but lube pump does not turn on. No power at the Black #5 wire Power at the Black #5 wire but no power at the Black #3 wire when hammer switch engaged. Power at the black #5 wire and power at the Black #3 wire when the hammer switch is engaged.	Check fuse. If bad, replace fuse. If fuse is good, check connections at power source and repair as necessary. Check for power going to the pressure switch in the priority hydraulic circuit, if there is no power, check connections and repair as necessary. Check for power coming from the pressure switch when the hammer switch is engaged, if power does not go through the pressure switch, check the priority hydraulic pressure to make sure it is to specification. If hydraulic pressure is good pressure switch is bad and needs to be replaced. Separate computer housing from base of pump and check for power from the computer to the red and green wires from the computer to the drive motor, if power is at the red and green wires and pump is not turning pump motor is bad and needs to be replaced. If no power at red and green wires computer is bad and needs to be replaced.

Lube pump working but no lubricant at hammer tool.	Pumping unit not working.	Replace pumping unit or units. When using Chisel Paste pumping units should be replaced after 1,000 hours of use as they start to lose efficiency from the wear of the chisel paste. See pumping unit replacement sheet. Run pump to be sure pumping unit primes before connecting lube lines.