21
2620 Series Hydraulic Installation Tools (
HK1012
)
Alcoa Fastening Systems & Rings
T
ROUBLESHOOTING
1. Tool fails to operate when trigger is pressed.
a. Inoperative
POWERIG
®
Hydraulic Unit. See
applicable instruction manual.
b. Loose electrical connections.
c. Damaged
trigger
assembly.
d. Loose or faulty hydraulic hose coupling.
2. Tool operates in reverse.
a. Reversed hydraulic hose connections between
POWERIG and tool.
3. Tool leaks hydraulic fl uid.
a. Defective
or
worn O-rings or loose hose
connections at tool.
4. Hydraulic
couplers
leak
fl uid.
a. Damaged or worn O-rings in coupler body (P/N
110440
).
5. Hydraulic
fl uid overheats.
a. Hydraulic unit not operating properIy; see unit’s
manual.
b. Unit running in reverse (918 & 918-5 only). See
unit’s manual.
6. Tool operates erratically and fails to properly
install fastener.
a. Low or erratic hydraulic pressure supply; air in
system. See applicable instruction manual.
b. Damaged or excessively worn piston O-ring.
c. Excessive
wear
on or scoring of sliding surfaces
of tool parts.
7. Pull grooves on fastener pintail stripped during
PULL stroke.
a. Operator not sliding anvil completely onto
fastener pintail.
b. Incorrect fastener grip.
c. Worn or damaged jaw segments.
d. Metal particles accumulated in pull grooves of
jaw segments.
e. Excessive sheet gap.
8. Collar of fastener not completely swaged.
a. Improper tool operation. See Trouble 6.
b. Scored anvil in nose assembly.
9. Tool “hangs-up” on swaged collar of fastener.
a. Improper tool operation. See Trouble 6.
b. RETURN pressure too low.
c. Not enough collar lubricant.
d. Nose assembly not properly attached; see
Nose
Assembly Data Sheet
.
10. Pintail of fastener fails to break.
a. Improper tool operation. See Trouble 6.
b. Pull grooves on fastener stripped. See Trouble 7.
c. PULL pressure too low.
11. Nose will not release broken pintail.
a. Nose assembly incorrectly installed; see
Nose
Assembly Data Sheet
.
Always check the simplest possible cause (such as a loose or disconnected trigger line) of a malfunction fi rst. Then
proceed logically, eliminating other possible causes until the cause is discovered. Where possible, substitute known
good parts for suspected defective parts. Use this troubleshooting information to aid in locating and correcting
trouble.
H
YDRAULIC
C
OUPLINGS
TIP: U
SE
A
FINE
I
NDIA
STONE
TO
REMOVE
NICKS
AND
BURRS
FROM
DIAMETER
A
AND
LEADING
EDGE
TO
PREVENT
DAMAGE
TO
O-
RING
.
O-ring (P/N
504438
)
Back-up ring (P/N
501102
)
F
IGURE
14
