Ingersoll Rand IR12PS Operación Y Mantenimiento página 52

ASSEMBLY OF THE IR9PS AND IR12PS PICKHAMMERS
GENERAL INSTRUCTIONS
• Before assembly of the pickhammer, clean all parts
thor ough ly and lubricate surfaces with a thin fi lm of
rec om mend ed oil – (see lubrication).
• Apply a thin fi lm of O-ring lubricant to all O-rings be fore
fi nal assembly.
• It is recommended that the assembly of the nozzle (2)
be carried out by the manufacturer or au tho rised dis-
trib u tor.
• The existence of a piston air cushion should be de ter-
mined. Hold the cylinder vertically and al low the piston
to drop down the bore small di am e ter fi rst. An air cush-
ion is present if the piston "bounc es", at the bottom of
the cyl in der and no metal to metal contact noise can be
heard. If a cushion is not present contact your au tho rised
Ingersoll – Rand repair centre for advise.
CYLINDER ASSEMBLY
Grip the cylinder (1) vertically in a vice protected with leath er
or copper covered vice jaws.
Lubricate and insert the piston (3) small end fi rst into the
bore. Check for air cushion.
Lubricate and slide the valve ring (4) onto the cyl in der and
replace the valve plate (5).
Replace the spacing washer (6) on top of the valve plate.
HANDLE ASSEMBLY
Position trigger (25) in its slot in the handle body and align
the holes in each part.
Drift or press home the trigger pin (26). Check the throt tle
lever is free to move easily.
Grip the handle body (24) in a vice protected with leath er or
copper covered vice jaws.
Lubricate and insert throttle pin (32) into position re duced
diameter out of the hole.
Replace the throttle ball (27) and throttle spring (28) and
retain in place with throttle valve plug (29), apply Loctite
243 to the threads of the plug and screw home fully.
If the air inlet (30) has been removed, refi t it into the handle
body using Loctite 243 and screw home fully.
Replace the quick release coupling (31).
All manuals and user guides at all-guides.com
Firmly grip the cylinder assembly vertically across the fl ats,
in a vice protected with leather or copper cov ered vice jaws.
Check for correct lo ca tion of the valve ring (4) valve plate (5)
and spac ing washer (6).
Carefully lower the han dle assembly (23) onto the cyl in der
and engage the threads. Tighten the handle down by hand.
Fully tighten the han dle using the 1.5 meters long pipe until
the lock pin (7) can be replaced in po si tion – thread to the
out side.
Slide the muffl er (9) down the cylinder until the muf fl er re-
tain ing lip engages with the groove in the cyl in der. Replace
the retaining clip (10) in its groove in the cyl in der (IR9PS
only).
Replace the sealing ring (8) in its groove in the cyl in der.
Inspect the chisel buffer (13) for wear and replace if nec es sary,
by sliding a new buffer into the retainer.
Screw the retainer onto the cylinder assembly.
Grease the latch plunger (22) and plunger spring (21) and
insert them into position in the fronthead (15).
Locate the latch lever (20) with the holes in the front head and
press or drift into place the fronthead spring pins (18,19).
Check the operation of the latch.
Slide the fronthead (15) onto the end of the cylinder and align
the bolt hole with the groove machined in the cylinder.
Fit fronthead screw (16) and secure with front head
nut (17) tighten to 90 Nm (66.4 lbs.ft) torque.
Following service or repair the pickhammer should be checked
for correct operation before being sent back to the job site.
Fit the correct size accessory into the pickhammer and con-
nect to an airline. Using low pressure 2 bar (30psi) check
to ensure the pickhammer is free of air leaks around the
inlet connection and also that the pick ham mer does not
au to mat i cal ly start to operate without the trigger being
depressed.
Increase the air pressure to 6 bar (90psi) and run the tool in
short bursts to check the tools starts and stops cleanly and
without hesitation.
Pickhammer operating frequency should be as given in the
specifi cation table at the end of this manual.
MAIN ASSEMBLY
ASSEMBLY OF THE FRONTHEAD – SCREW
RETAINER MOD ELS
ASSEMBLY OF THE FRONTHEAD – LATCH
RETAINER MOD ELS
ASSEMBLY CHECKS