Applifast HK961, Instruction Manual

Page: 13 / 36

2580 series Hydraulic Installation Tools
(HK961)
13
1. Tool fails to operate when trigger is depressed:
a. Inoperative POWERIG ® Hydraulic Unit. See
applicable instruction manual.
b. Loose or disconnected control cord.
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
hydraulic unit and tool.
3. Tool leaks hydraulic fluid:
a. Depending on where leak occurs, defective or worn
O-rings, or loose hydraulic hose connection at tool.
4. Hydraulic couplers leak fluid:
a. Damaged or worn O-ring in coupler body.
See Figure 4.
5. Hydraulic fluid overheats:
a. Hydraulic unit not operating properly. See applicable
POWERIG Hydraulic Unit Instruction Manual.
b. Unloading valve installed backwards.
6. Tool operates erratically and fails to install fastener properly:
a. Low or erratic hydraulic pressure supply - air in system.
See applicable POWERIG Instruction Manual.
b. Damaged or excessively worn piston O-ring in tool.
c. Unloading valve installed backwards.
d. Excessive wear or scoring of sliding surfaces of tool parts.
e. Excessive wear of unloading valve.
Always check out simplest possible
cause of malfunction first. For example,
switch turned off or power cord not con-
nected. Then proceed logically,
eliminating each possible cause until the defective circuit or part is located.
Where possible, substitute known good
parts for suspected bad parts. Use
TROUBLESHOOTING chart as an aid in
locating and correcting malfunction.
T
T
ROUBLESHOOTING
ROUBLESHOOTING