19
SECTION VI
TROUBLESHOOTING
SYMPTOM
PROBABLE CAUSE
REQUIRED ACTION
Gauge shows pressure build-up but the
tool will not cycle
1. Couplings loose or inoperative
2. Solenoid inoperative
1. Tighten and/or replace couplings. Use Test #1
listed below to isolate problem.
2. Check using test #2 below. If solenoid is bad,
replace.
Cylinder will not retract.
1. See above
2. Voltage to electric pump is too low
to line drop or inadequate amperage is
available.
3. Linkage between piston rod and drive
arms are broken.
1. See Above
2. Get shorter extension cord or upgrade to
12AWG, 25 amp rating or better. If shop power is
adequate, draw power from welding machine or cal
rod transformer.
3. Replace parts as necessary.
Cylinder pressure will not build.
1. Oil blow by in tool (Piston seal leak,
blown O-ring, cracked piston)
2. Pump Problem
1. Replace defective parts. SHOP JOB
2. Check to see if sub-plate is worn by; a) Remove
screws from pump motor to reservoir, slide Pump
motor to the side, turn pump on and while holding
down on the button, put your finger on the dump
tube (round tube under the directional control
valve) - if you feel pressure, then replace the sub-
plate and shear seals.
2A. Check to see if you have leaks from the
external relief valve and the 2 oil line connections
(bottom of relief valve and connection into pump
body’s other end) of oil line. If leaking, retighten
with 9/16” open end wrench. SHOP JOB
2B. If pump sounds like a lot of pebbles in a tin
can, the problem may be a worn motor coupling.
Remove motor from base plate - using a pair of
needle nose pliers remove the motor coupling - if
worn, replace. SHOP JOB
2C. AIR PUMPS - Faulty Air Valve due to exces-
sive moisture and/or dirt in air supply. Disassemble
air valve and wipe any residue from air valve piston.
Spray brake cleaner into air valve body,
dry thoroughly. Disassemble all small air lines and
blow out with compressed air. Lubricate both air
valve piston and body with hydraulic oil (sparingly)
and reassemble. SHOP JOB
2D. Air pumps - Faulty remote control valve
cartridge. Replace.
