Operating Instructions and Parts List, Form No. 1000026, Back sheet 2 of 6
SERVICING INSTRUCTIONS
PREVENTIVE MAINTENANCE
The majority of service troubles are caused by dirt collecting about the tool or in the oil system. Keep the tool clean
and prevent foreign matter from entering the compressor while filling the reservoir. Lubricate all moving parts and
keep the C-head stop screw, ram guide screw, and reservoir handle stop screw tightened.
FILLING RESERVOIR
To add or replace oil in the compressor, retract the ram completely. Loosen the reservoir handle stop screw and
remove the handle. Remove the reservoir plug and O-ring seal. Pull the stem of the reservoir piston out as far as
possible. Add oil until it fills the stem. See “Compatible Hydraulic Fluids” Section.
DO NOT USE BRAKE FLUID OF ANY KIND.
Before replacing the reservoir plug, advance the ram a short distance by stroking the pump lever. Retract the ram by
pulling the trigger on the pump lever and make a pumping stroke, first having taken precautions against splashing of
the oil. Repeat this procedure until air bubbles cease appearing. Add oil if necessary to fill the stem, first making
certain the C-head ram is fully retracted so that too much oil is not added. Replace the O-ring, reservoir magnetic
plug and handle; tighten the reservoir handle stop screw.
Pump until the die faces meet, and then retract the ram. If the ram does not retract completely, too much oil had been
added. Drain enough to permit complete retraction.
REPLACING HYDRAULIC SEALS
Maintenance and repair of this tool should be provided with the same reasonable care given other fine equipment.
Service should be performed by adequately trained personnel in repair shops under clean conditions. For those
owners having adequately staffed repair facilities, a hydraulic seal replacement kit No. 3-3554 containing O-rings,
gaskets, etc., needed for one complete replacement of hydraulic seals in the compressor. Include compressor serial
number when ordering all parts.
To replace the seals it is necessary to separate the C-head and piston assemblies from the cylinder. Remove both
die halves. Removing the quick coupler drains the oil and aids in dis-assembly. Remove screw and washer to unlock
cylinder.
Unscrew the C-head and the piston will also rotate. After nine complete turns the piston spring rod is unthreaded
from within the cylinder and the piston guide arrangement should be removed. Further rotation will separate the C-
head from the cylinder. Pull the piston from the cylinder. All seals and rings are now accessible.
Reassemble with clean parts lubricated with the same grade of oil used in the remote pump. The steel piston washer
and leather wiper are installed on the outside of the piston with the steel washer next to the shoulder on the piston.
Insert piston into cylinder, rotate assembly until hand tight. Backoff one-half turn to permit the piston wipers to center
themselves in the C-head bore. Thread the C-head onto the cylinder until the bottom of the die groove in piston is
flush at a corresponding point on the C-head. Continue rotation until the key slots align. At this attitude, top of piston
should not have entered C-head opening and a die-half can be inserted in piston groove.
Reassemble the piston guide arrangement with Loctite on screw threads.
Invert the tool and fill the cylinder with oil. Bleed air from cylinder by rocking tool back and forth. Assemble 3/8 inch
female quick coupler.
WARNING
