14
256 Pneudraulic Installation Tool (HK1015)
Alcoa Fastening Systems & Rings
Always check out the simplest possible cause of a malfunc-
tion first. For example, an air hose not connected. Then
proceed logically, eliminating each possible cause until the
cause is located. Where possible, substitute known good
parts for suspected bad parts. Use TROUBLESHOOTING
CHART as an aid in locating and correcting malfunction.
Note: “Piston drift” is when the air piston is in the down
position, but the hydraulic pull piston is not in the full
follward position. This causes an out of sequence condi-
tion.
1 Tool fails to operate when trigger is depressed.
a) Air line not connected
b) Throttle Valve O-rings worn or damaged.
c) Throttle Valve Cable is broken.
2 Tool does not complete fastener installation and break
pintail.
a) Air pressure too low
b) Air Piston Quad Ring worn or damaged.
c) Reservoir empty or low, refer to Fill and Bleed
section.
d) Air in hydraulic system, refer to Fill and Bleed
section.
e) Reservoir Springs worn or damaged
f) Check for piston drift
3 Pintail stripped and/or swaged collar not ejected.
a) Check for broken or worn jaws in nose assembly,
refer to nose assembly data sheet.
b) Check for loose Retaining Nut
c) Check for piston drift.
4 Tool has piston drift.
a) Loose collet crashing into the front of the anvil
causes the relief valve to open allowing the piston to
drift. Tighten the collet and refer to Fill and Bleed
section.
b) Worn or damaged Return Pressure Relief Valve in
tool, inspect Seat, O-Ring, Back-up Rings, Steel Ball
and Valve Spring. Replace if necessary.
c) Worn or damaged Intensifier Piston Assembly:
Inspect O-Rings and Back-up Rings, and replace if
necessary.
5 Hydraulic fluid exhausts with air or leaks at base of
handle.
a) Worn or damaged Gland Assembly: Inspect
Polyseal, O-rings, Quad Ring, and Back-up Ring,
and replace if necessary.
6. Hydraulic fluid leaks at rear of Pull Piston
a) Worn or damaged Rear Gland: Inspect O-Rings and
Back-up Rings, and replace if necessary.
7. Hydraulic fluid leaks at front of Pull Piston.
a) Worn or damaged Front Gland: Inspect Polyseal
and replace if necessary.
8. Pull Piston will not return.
a) Throttle Valve stuck: Lubricate O-Rings.
b) Throttle Arm, Cable, or Trigger binding.
9. Air leaks at Air Cylinder Head.
a). Worn or damaged O-Ring. Replace if necessary.
Stroke Limiter
-
118362-1
Reduces stroke to .750 inches (1.91 cm)
Stall Nut
-
120824
Pintail Collection Bag -
125655
Service Tool Kit
-
126104
Includes:
Piston Assembly Bullet (Fig. 2) -
123111-1
Spacer (Fig. 2)
-
123112-1
T r o u b l e s h o o t i n g
A c c e s s o r i e s
