14
12142 Hydraulic Installation Tool (HK638)
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 air or electric connections.
c. Damaged trigger assembly.
d. Loose or faulty hydraulic hose couplings.
e. Unloading valve not installed in tool.
2. Tool operates in reverse.
a. Reversed hydraulic hose connections between
POWERIG and tool.
3.
Tool leaks hydraulic fluid
.
a. Defective or worn O-rings or loose hose
connections at tool.
4. Hydraulic couplers leak fluid.
a. Damaged or worn O-rings in coupler body. See
Coupler (P/N
110440
).
5. Hydraulic fluid overheats.
a. Hydraulic unit not operating properIy; see unit’s
manual.
b. Unloading valve incorrectly installed.
c. POWERIG 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.
b. Damaged or excessively worn piston/anvil O-ring.
b. Unloading valve incorrectly installed.
d. Excessive wear on or scoring of sliding surfaces
of tool parts.
e. Excessive wear of unloading valve.
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 HUCKBOLT
®
fastener not completely
swaged.
a. Improper tool operation. See Trouble 6.
b. Scored anvil in nose assembly.
9. Jaw segments do not maintain proper position in
collet.
a. Improper operation of jaw follower. Check
number of follower O-rings.
10. Tool “hangs-up” on swaged collar of HUCKBOLT
fastener.
a. Improper tool operation. See Trouble 6.
b. RETURN pressure too low.
11. 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.
d. Worn unloading valve.
Always check the simplest possible cause (such as a loose or disconnected trigger line) of a malfunction first. 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.