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GATES.COM
TroublesHooTing
Gates GC20 Cortex
TROUBLESHOOTING
All equipment is tested for proper performance before it is shipped from the fac-
tory. However, if you should experience any difficulties, we recommend you check
this guide to help restore the equipment to proper operating standards before
contacting Gates customer service.
PROBLEM
SOLUTION
Crimper will not come up to
pressure
Check the oil level in the pump.
Check operation of the pump relief valve. (See pump
operation manual.)
Crimper leaves a “bell” or “tail” on
the ferrule.
Check the location of the ferrule in the die fingers before
crimping.
Crimping produces the wrong crimp
diameter.
Check for proper die set.
Check for proper hose/ferrule/stem combination.
Run a maintenance calibration of the crimper.
Pump will not activate crimper.
Check electrical connections between the pump and the
crimper, and between the pump and the wall outlet.
Crimping unit is off-center under
the ram.
Make certain that the die backup ring is completely back
against both rear locating pins.
Ram will not retract, retracts slowly,
or retracts with a “jerky” motion.
Carefully remove hose assembly from pump. Fluid is
under pressure. Be prepared to catch fluid in a container.
If ram retracts normally, without a “jerky” motion, repair
or replace relief valve in the pump. If ram does not
retract, retracts slowly, or retracts with a “jerky” motion,
the piston or piston seals may be damaged by binding.
Replace piston seals or piston.
Cylinder leaks hydraulic fluid.
Replace piston seals.
Hose assembly will not fit through
baseplate of crimper.
Check the width of the slot in the crimper’s baseplate.
Width should measure at least 2.64". If not, grind
baseplate slot to increase width to accommodate –20
MegaCrimp
®
.
Hose assembly will not fit through
die backup ring.
Check diameter of hole in the die backup ring. Diameter
should measure 2.56". If not, grind the die backup ring
hole to increase the diameter, or replace.
Die cone sticks on die fingers.
Check inside of the die cone for proper lubrication. Apply
a thin layer of Molykote “G” grease to lubricate the die
cone.
Crimping unit does not fit under
ram.
Check the distance between the bottom of pusher cup
and top of base plate. The distance should measure
5.37".
Check for correct ferrule and die.