Ridge Tool Company
3
• Do not over-tighten the connections. Connections
need only be tightened securely and leak-free.
Over-torque may cause premature thread failure and
may cause high pressure fittings to split at pressures
lower than their rated capacities.
• Do not subject the hose to any potential hazard
such as fire, extreme heat or cold, heavy impact or
sharp surfaces. Do not use the hose to lift or
move the equipment connected to it.. Might rupture
or weaken the hose.
• Periodically inspect the hose for signs of wear.
Never use a defective hose with any pressurized
equipment. Escaping hydraulic fluid could cause seri-
ous injury.
• Never paint the couplers, fittings or hose. Make
sure that the hose material and coupler seals are
compatible with the hydraulic fluid used. Avoid
contact with creosote-saturated materials. May
result in hose damage and leaking of hydraulic fluid.
Hydraulic Pump
• Never exceed the rated capacity of the unit. Never
tamper with the internal high pressure relief valve.
May result in pump failure.
• Always retract the system before replenishing the
oil level. Never over-fill the pump reservoir with oil.
Could damage the pump.
Hydraulic Cylinder
• Keep the cylinder clean at all times. Keep the pis-
ton fully retracted when the cylinder is not in use.
Prevents damaging the cylinder.
• Make certain that the hydraulic fluid added to the
system is compatible with the seals and the exist-
ing fluid. Never use brake fluid. May result in leaking
of the hydraulic fluid.
Description, Specifications and
Standard Equipment
Description
RIDGID Hydraulic Knockout Sets are designed for
punching holes of
1
/
2
″
through 4
″
(conduit size) diameter
in mild steel of up to 10 gauge (.134
″
/ 3.40mm) maxi-
mum thickness.
The RIDGID Model HKO-186 Knockout Set includes
the H-18 Hand Pump, 8R111S Hydraulic Cylinder, 3
ft. hose,
1
/
2
″
-2
″
Punch/Die Sets and various accessories.
The Model FKO-186 Knockout Set is the same basic set
except that the HF-18 Foot Pump is included in place of
the hand pump and a 10 ft. hose is provided.
The single-stage hand pump will develop up to 10,000
PSI pressure with a maximum handle effort of 80 lbs.
The two-stage foot pump will develop 10,000 PSI of
pressure with maximum lever effort of 143 lbs. Both
pumps incorporate an internal relief valve set at 10,000
PSI. The ram will develop up to 100 tons of force at
10,000 PSI and has a 1
″
stroke.
Specifications
Ram:
Capacity .......................11.2 Tons
Stroke...........................1 Inch
Oil Volume....................2.45 cu. in.
Weight ..........................5.3 lbs.
Punch Diameter
(Conduit Size)...............
1
/
2
″
through 4
″
Maximum Plate
Thickness.....................10 Gauge (.134
″
/ 3.4mm)
Pump: ............................H-18..................HF-18
Stage ..............................Single................Two
Volume Per Stroke:
Low Pressure .........................................670 cu. in.
High Pressure ..............0.061 cu. in........0.061 cu. in.
Valve ............................2-Way ...............2-Way
Maximum Pressure ......10,000 PSI........10,000 PSI
Reservoir Capacity.......18.6 cu. in. ........18.6 cu. in
Useable Volume...........16 cu. in. ...........16 cu. in
Maximum Lever Effort ...80 lbs. ...............143 lbs.
Oil Port .........................3/8
″
NPTF..........3/8
″
NPTF
Weight (w/o Oil) ...........7.5 lbs. ..............11 lbs.
Relief Valve..................Yes ....................Yes
HKO-186/1810, FKO-186/1810 Hydraulic Knockout Sets
Hydraulic Hand Pump
3
1
/
2
″
2
43
/
64
″
14
9
/
16
″
4
1
/
4
″
