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1.0 MAINTENANCE
1.4.2 Center Head Bearing Replacement
1. Raise head as far as possible by turning knob "C".
2. Remove pulley "H".
3. Remove chip chute "D".
4. Remove cutting block from table.
5. Back off bolts "E" approximately 1/2" and slide head
up on rods so there is enough clearance between
table and bottom of head to allow spindle to be re-
moved (place block between table and head to hold
in up position).
6. Tap out spindle (down).
7. Tap out bearings (must use rod from opposite end
of each bearing).
8. Tap the upper bearing (S-706) in place using a piece
of wood between the hammer and the bearing (an
old drill block works fine).
9. Place the lower bearing (S-706) on the spindle and
tap in the spindle and bearing simultaneously. Use
the wood block from the previous step to protect
the spindle.
10. Replace the chip chute and pulley.
11. Adjust head for drill depth.
1.5 HYDRAULIC
Through normal use, hydraulic systems gum up and
seals wear. Signs of wear are hydraulic leaks and er-
ratic operation of the vertical speed. Check with your
Authorized Challenge Dealer for a current repair and/or
replacement policy. Replace oil yearly. (Capacity: 1
Quarts/1.4 liters)
CAUTION: NEVER USE Automatic
Transmission oil or brake fluid as a sub-
stitute! Oils other than the recom-
mended type will cause seals, cups and O-rings
to deteriorate. Unsafe operating conditions will
result.
1.5.1 Recommended Oils
Oil Name
Rykon No. 100 ............................................. AMOCO
Duro AW Oil 465 ................................................ Arco
AW Machine Oil 100 ..................................... Chevron
Pacemaker XD No. 100 ..................................... Citgo
Super Hydraulic 100 ...................................... Conoco
Nuto H-100 ..................................................... Exxon
Harmony 100 AW ............................................... Gulf
HO 2A Hydraulic Oil ................................... Lubriplate
DTE No. 18 ....................................................... Mobil
Pennzoil AW 100 ......................................... Pennzoil
Magnus A Oil 215 .......................................... Phillips
Tellus 100 ......................................................... Shell
1-6
Energol HLP 100 ............................................. Sohio
Industron 100 ........................... Std. Oil Indiana/Boron
Sunvis 851 WR ............................................. Sunoco
Rando HD 100 ............................................... Texaco
Unax AW 100 ....................................... Union Oil Co.
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2
Distributor
F.352-KT/EH-3C DRILL/AUG 03
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