5
Operating & Service Instructions - continued
STORAGE
Before storage of the tool, blow all water out of the tool and
blow in a generous amount of 10W machine oil to deter
corrosion.
CAUTION:
Before operating these tools, always make
sure that the handles (41) are threaded fully and se-
curely into the motor case and that the operator is fully
prepared to safely absorb the full stall torque of the
tool in the event that the drill hangs up during opera-
tion.
SERVICE INSTRUCTIONS
SERVICING THE HIGH PRESSURE COUPLING
If after some usage, it is found that the high pressure cou-
pling begins to leak excessively, it may be necessary to
replace the “O” rings and back-up rings on the seal sup-
port. By removing the coupling retainer No. 22, it will be
possible to grasp part No. 23 and by slightly twisting back
and forth, pull the seal support from the shaft. It is sug-
gested that anytime the support is removed for servicing,
that new “O” ring and back-up rings be installed on the seal
support. The back-up ring is installed in the groove first
with the radius portion of the back-up ring facing the small
end of the support. Install in the same groove beside the
back-up ring, one of the “O” rings as furnished. These “O”
rings are of special durometer hardness to stand the 5000
psi pressure. Standard “O” rings and back-up rings
should
never be used
as they will as they will have a tendency to
extrude from the groove and deteriorate very rapidly. After
installation of the back-up ring and“O” ring in each groove,
three in number, liberally lubricate the seal support and
“O” rings with grease and placing in the shaft and rocking
the seal support back and forth, push the support into the
shaft. Push on the support until it touches the bronze bear-
ing. Reinstall the coupling retainer No. 22 and tighten se-
curely. This will normally repair the coupling and stop the
leakage.
REPLACING THE DRIVE SHAFT
If after considerable usage, it is found necessary to replace
the drive shaft because of wear to the seal area, remove
the socket head cap screws No. 8 that hold the case cover
in place. This will allow removal of the case cover at this
point. With the proper size Allen wrench, reach down
through the thrust nut No. 14, in one of the elongated slots
and loosen the two set screws that are in the thrust nut.
Rotate the shaft until the set screws appear. After loosen-
ing the set screws, use a wrench and rotate the spindle in
a counterclockwise rotation which will unthread the thrust
nut from the shaft. Once the thrust nut has been unthreaded,
it will be possible then to remove the shaft from the ma-
chine. At this point it is advantageous to remove the thrust
nut No. 14, which will allow servicing of the thrust bearing
and allow inspection of this part to make sure that the thrust
bearing is in good condition before replacement in the
machine. Also, at this point, the bronze bearing No. 21 can
be inspected to make sure that it is not worn to allow ex-
cess wobble of the shaft in this area. To install the new
shaft, it will be necessary to press the old shaft from the
gear by resting the gear on the inner diameter and pushing
the large threaded end of the shaft. This will allow the spindle
to be pressed from the gear in this direction. Install the
drive key in the new shaft and replace the large drive gear
on the new shaft by pressing it until the diameter of the
shaft is flush with the back of the large gear. At this point, it
would be advantageous to run the shaft between centers
to make sure that the gear has been pressed on square to
prevent problems in operation of the machine after assem-
bly. If it is found that the gear does not run true, the gear
should be realigned by pressing on the proper spot for
seating the gear squarely on the shaft. If other bearings or
seals are excessively worn, they should be replaced in this
area before reinstalling the shaft. To reinstall the shaft, feed
the shaft down through the housing until the small diam-
eter of the shaft protrudes from the front portion of the case.
At this point, place on the shaft the thrust nut along with the
thrust bearing washers, thrust bearing and adjusting nut.
The shaft can then be pushed father into the motor to allow
the shaft to start entering into the rear bronze bearing. As
soon as this is done, the thrust nut No. 14 should be tight-
ened into position and again placing an Allen wrench down
through one of the crescent shaped holes in the side of the
thrust nut, the adjusting nut can be screwed on the shaft.
Continue to thread the adjusting nut on the shaft while the
shaft is being rotated and also being pushed rearward as
this operation is being performed. As soon as possible, the
front gear cover should be reinstalled and the cap screws
tightened. By continuing rotating the shaft, adjust the thrust
adjusting nut until a slight resistance is felt on the Allen
wrench when the shaft is rotated. At this point, turn the
shaft and wrench together until it touches the right-hand
side of the crescent shaped opening until the wrench
reaches the end. Then rotate the nut back the entire length
of the opening and at this point, tighten the set screw. Ro-
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